BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Industrial contributions to the maintenance of CERN helium cryopla nts DTSTART;VALUE=DATE-TIME:20080923T113000Z DTEND;VALUE=DATE-TIME:20080923T115500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-24@cern.ch DESCRIPTION:Speakers: Mr. FERRAND\, Frederic (Air Liquide)\nCERN has the l argest concentration in the world of high capacity helium cryoplants for t he LHC and its experiments. Production and distribution systems have been designed to ensure a minimum service in case of a major failure of a sub-s ystem. But the availability of cryoplants also relies on spare parts strat egy\, maintenance methods and capability to get the best plant follow-up and time to repair.\n\nCERN is working together with industrial partners t o ensure a high level of expertise in the field of maintenance\, and to im plement a comprehensive maintenance policy for its key assets. The core of this policy is based on a preventive maintenance plan managed and perform ed by the contractor during annual shut down. This plan is also completed with predictive and corrective maintenance during standard operation to pr ovide adapted technical support. \n\nThe presentation will give a general overview of the maintenance policy and focus on benefits of predictive mai ntenance tools and indicators for screw compressors vibration analysis\, a nd benefits of advanced portable devices for field work interconnected wit h Computerized Maintenance Management Software.\n\nhttp://indico.cern.ch/c ontributionDisplay.py?contribId=24&sessionId=5&confId=26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=24&sessionId=5& confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:CERN's cryogenics safety record DTSTART;VALUE=DATE-TIME:20080923T133000Z DTEND;VALUE=DATE-TIME:20080923T135500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-25@cern.ch DESCRIPTION:Speakers: Mr. PERINIC\, Goran (CERN)\nCERN operates an extensi ve park of cryogenic refrigeration and distribution systems and CERN is ab out to terminate an extremely demanding project with the putting into serv ice of the LHC. There is not only a large variety of cryogenic systems\, b ut there are also many particularities due to the installation conditions comprising surface and underground locations. Due to the often quite excep tional conditions safety plays an important role in design\, construction and operation. As a matter of fact CERN can today present for both\, the o perational installations as well as the commissioned installations\, an en viable safety record.\nThis paper shall recall the main safety considerati ons for the cryogenic installations and it shall review the incidents link ed to cryogenic installations that have occurred during the years of the L HC construction as well as the lessons learned from these incidents.\n\nht tp://indico.cern.ch/contributionDisplay.py?contribId=25&sessionId=6&confId =26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=25&sessionId=6& confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:Application of a computer aided maintenance management system to C ERN's cryogenic installation park DTSTART;VALUE=DATE-TIME:20080923T120000Z DTEND;VALUE=DATE-TIME:20080923T122500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-26@cern.ch DESCRIPTION:Speakers: Mr. PERINIC\, Goran (CERN)\nWith the end of the comm issioning of the cryogenic refrigeration and distribution systems\, CERN s hall enter a new period. It will be demanding not only for operation\, but also for the services that support and ensure operation as e.g. maintenan ce. In order to ensure the best possible maintenance services for an exten sive cryogenic refrigeration and distribution system\, industrial maintena nce management methods must be applied. Maintenance management comprises t asks of asset management\, warehouse management as well as work order mana gement.\nThis paper shall present CERN’s maintenance management strategy . It shall furthermore present the current state of the deployment of an i ndustrial maintenance management system (CAMMS) to the cryogenic installat ions as well as the future prospects.\n\nhttp://indico.cern.ch/contributio nDisplay.py?contribId=26&sessionId=5&confId=26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=26&sessionId=5& confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:The world of cryogenics at CERN DTSTART;VALUE=DATE-TIME:20080923T073000Z DTEND;VALUE=DATE-TIME:20080923T075500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-27@cern.ch DESCRIPTION:Speakers: Dr. DELIKARIS\, Dimitri ()\nToday at CERN\, cryogeni cs is largely used in the LHC project under commissioning for cooling the 27 km magnet ring which requires the largest 1.8 K helium refrigeration an d distribution systems in the world as well as its two largest detectors ( ATLAS and CMS)\, which incorporate a variety of cryogenic equipment. In ad dition\, cryogenics is used for cooling specific experiments not related t o the LHC complex. Finally\, CERN wide\, liquid helium is produced and dis tributed for specific users and cryogenic test facilities.\nThis presentat ion will introduce the CERN cryogenics world with emphasis on operation ch allenges and specificities.\n\nhttp://indico.cern.ch/contributionDisplay.p y?contribId=27&sessionId=3&confId=26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=27&sessionId=3& confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:Design status of the cryogenic system of JT60-SA: optimization of the refrigeration capacity for different operation modes DTSTART;VALUE=DATE-TIME:20080925T083000Z DTEND;VALUE=DATE-TIME:20080925T085500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-20@cern.ch DESCRIPTION:Speakers: Dr. HOA\, Christine (CEA Grenoble)\nThe JT-60SA proj ect is a combined project of the Japanese and European Satellite Tokamak P rogramme under the Broader Approach Programme. The tokamak will be operate d in 2015 in Japan and will support ITER exploitation and research towards DEMO. This tokamak is currently in the conception design phase.\nThe cryo genic system of JT60-SA is designed to provide supercritical helium at 4.5 K\, to cool down the superconducting magnets\, their structures and cryop umps. The equivalent refrigeration capacity at 4.5 K will be around 11 kW (including thermal shields at 80K and current leads at 50K) and has to be optimised for different operation modes:\nDuring the day\, the refrigerato r has to cope with the pulsed heat loads due to the heating of the plasma reactions. The peak heat loads can increase up to 40% of the average power . During the night\, the tokamak is under holding operation mode and the h eat loads are highly reduced.\nThe operation under pulsed heat loads can b e critical for the refrigeration and the cryogenic devices\, which cannot accept large variations in time. The presentation will focus on the differ ent solutions for smoothing the heat loads\, such as the use of a thermal buffer tank and the controls on cryogenic components in order to regulate the helium mass flow rate and to maintain a stable operation of the refrig erator. The design of the cryogenic system will be addressed taking advant age of the day/night cycles\, in order to reduce the investment costs.\n\n http://indico.cern.ch/contributionDisplay.py?contribId=20&sessionId=10&con fId=26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=20&sessionId=10 &confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:Design choices of the cryogenic system for the long-term operation of ATLAS and CMS detector magnets DTSTART;VALUE=DATE-TIME:20080923T090000Z DTEND;VALUE=DATE-TIME:20080923T092500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-21@cern.ch DESCRIPTION:Speakers: Mr. DELRUELLE\, Nicolas (CERN)\nThe design of detect ors for High Energy Physic experiments is frequently based on large superc onducting magnets generating the field for particle momentum measurements. The CMS experiment is built around a single large superconducting solenoi d\, whilst the magnetic configuration of ATLAS is based on a thin Central Solenoid surrounded by a large superconducting toroid consisting of three separate magnets\, the Barrel and two End-Caps.\nThe cooling of all these magnets is achieved by an indirect method which greatly simplifies the cry ostat design. For the two solenoids (CMS and ATLAS Central Solenoid)\, the simplest cryogenic principle to drive the helium flow into the cooling pi pes has been adopted\, i.e. the thermo-siphon which uses the hydrostatic p ressure difference between the supplied liquid and the two-phase return. F or the three ATLAS toroids\, where the thermo-siphon could not be applied because of the unfavourable geometry and the complex helium internal distr ibution\, a centrifugal pump was necessary to ensure the stability in the two-phase regime.\nATLAS magnets have the particularity to use two separat e cryoplants\; one unit to cool-down all magnets from 80K down and operate them at 4.5K and a second simple plant dedicated to the cooling of the th ermal shields between 40K and 80K with minimized interruption for maintena nce.\nThis talk presents the reasons of these design choices which should ensure the easiest - while still flexible - operation of these LHC detecto rs during the next 15 years.\n\nhttp://indico.cern.ch/contributionDisplay. py?contribId=21&sessionId=3&confId=26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=21&sessionId=3& confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:Collection of data related to the operation experience on the Tore Supra cryogenic system DTSTART;VALUE=DATE-TIME:20080925T090000Z DTEND;VALUE=DATE-TIME:20080925T092500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-22@cern.ch DESCRIPTION:Speakers: Mr. REYNAUD\, Pascal (CEA Cadarache)\nOperating mode s of the cryoplant are reconstructed for the considered years\, thus allow ing a more precise calculation of the system availability relatively to it s exploitation period and to the plasma exploitation period.\nOperating ti mes\, number and type of failures\, failure rates and mean time between fa ilures are given for the main components of the system.\nThe study focuses on the years 2004 to 2007\, which provide the most relevant data.\n\nhttp ://indico.cern.ch/contributionDisplay.py?contribId=22&sessionId=10&confId= 26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=22&sessionId=10 &confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:Process control systems for the LHC cryogenic systems DTSTART;VALUE=DATE-TIME:20080924T113000Z DTEND;VALUE=DATE-TIME:20080924T115500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-23@cern.ch DESCRIPTION:Speakers: Dr. GAYET\, Philippe (CERN)\nThe LHC Cryogenic contr ol system launched in 1999 followed a maturation process to reach the pres ent layout. This evolution led by technical and operational issues will be reviewed in the presentation together with the initial operational requir ements.\nWe will present the current operational tools such as control inf rastucture monitoring\, access control principle\, process simulation... a lready implemented in the process control system.Finally we will assess th e future improvements to be introduced.\n\nhttp://indico.cern.ch/contribut ionDisplay.py?contribId=23&sessionId=8&confId=26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=23&sessionId=8& confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:LHC Cryogenics: Cool-down of the ring for commissioning and first beams DTSTART;VALUE=DATE-TIME:20080923T083000Z DTEND;VALUE=DATE-TIME:20080923T085500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-28@cern.ch DESCRIPTION:Speakers: Mr. CLAUDET\, Serge (CERN)\nA recall of the LHC cryo genics architecture and hardware equipment will be given\, including the o rganization and achievements for cool-down of the eight geographical secto rs. The hardware commissioning procedures of the cryogenic system and mach ine will be described. A brief introduction to the preparation work in vie w of the first beam injection will be presented. Finally the long-term cry ogenic operation perspectives will be summarized.\n\nhttp://indico.cern.ch /contributionDisplay.py?contribId=28&sessionId=3&confId=26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=28&sessionId=3& confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:Welcome and introduction to CERN DTSTART;VALUE=DATE-TIME:20080923T070000Z DTEND;VALUE=DATE-TIME:20080923T072500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-29@cern.ch DESCRIPTION:Speakers: Dr. LEBRUN\, Philippe ()\nhttp://indico.cern.ch/cont ributionDisplay.py?contribId=29&sessionId=3&confId=26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=29&sessionId=3& confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:Cyclotron Tank Cryopumping and Cryogenics for Superconducting Faci lities at TRIUMF DTSTART;VALUE=DATE-TIME:20080925T133000Z DTEND;VALUE=DATE-TIME:20080925T135500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-40@cern.ch DESCRIPTION:Speakers: Dr. SEKACHEV\, Igor (TRIUMF\, Canadian National Labo ratory)\nA modern helium refrigerator has replaced a 30-year old Philips c ryogenerator on the 500 MeV cyclotron. Two ~11m long cryopanels are cooled down to 4.5K from the previous 17K\, increasing pumping speed and improvi ng reliability of the 90 m3 cyclotron tank vacuum system.\nA 600 Watts hel ium refrigerator\, supporting the ISAC Phase-I SC-linac\, is now in routin e operation. The Phase-II SC-linac will be cooled with an identical refrig erator\, already commissioned and tested on the Phase-I section of the lin ac. This second refrigerator is being used for Phase-II linac development s\, including new SC-cavity performance tests.\nA 50 MeV\, 500kW supercond ucting electron linac\, with its 2K refrigeration system\, is proposed as a primary development for the Laboratory.\n\nRelevant design choices for t he above systems\, as well as results from recent operational and commiss ioning experience will be discussed.\n\nhttp://indico.cern.ch/contribution Display.py?contribId=40&sessionId=11&confId=26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=40&sessionId=11 &confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:Cryogenic improvements for the ATLAS accelerator energy upgrade DTSTART;VALUE=DATE-TIME:20080924T070000Z DTEND;VALUE=DATE-TIME:20080924T072500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-1@cern.ch DESCRIPTION:Speakers: Mr. MACDONALD\, Stephen (Argonne National Laboratory )\nThe ATLAS accelerator is a product of staged construction beginning in 1978. It serves as a national user facility for accelerating heavy ions a t energies in the vicinity of the Coulomb barrier. The accelerator is div ided into 3 sections with a refrigerator cooling each section through an i nterconnected forced flow distribution system. ATLAS acquired a CTI model 2800 from Lawrence Livermore National Laboratory as part of a major upgra de to the ATLAS accelerator. This refrigerator was installed to provide c ooling capacity for a new upgraded cryostat and to address other system is sues related to the staged construction\, forced flow distribution and nar row operating margin. The refrigerator sustained substantial damage durin g shipment and had several leaks which required extensive repair. An over view of the upgraded ATLAS cryogenic system and refrigerator repairs will be presented.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=1& sessionId=7&confId=26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=1&sessionId=7&c onfId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:Refrigeration Recovery for Experimental Hall High Target Loads DTSTART;VALUE=DATE-TIME:20080924T083000Z DTEND;VALUE=DATE-TIME:20080924T085500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-3@cern.ch DESCRIPTION:Speakers: Mr. KNUDSEN\, Peter (Jefferson Laboratory)\nThe End Station Refrigerator (ESR) at Jefferson Lab (JLab) supports three experime ntal halls. The refrigerator for the ESR\, a CTI 1500 W 4.5-K refrigerato r designed in the late 1970’s\, is capable of supporting a 1250 W target load at 15 K (simultaneously with a 1100 W 4.5-K refrigeration load). Th is plant has been routinely supporting 15-K target loads\, as well as 4.5- K magnet loads\, since 1994. In the summer of 2004\, a single use\, two w eek run duration\, high powered target load required some low cost modific ations to ESR in order to allow the target to be directly supplied with su per-critical 4.5-K helium from JLab’s Central Helium Liquefier (CHL). H owever\, after the installation of these modifications\, which included an air ambient vaporizer\, there has been a consistent usage of this capabil ity for the same sized target loads and a demand for an even higher target load by the planned Qweak experiment in mid 2009. In the Fall of 2004\, after it was apparent that this capability was now routinely being sought\ , a method of integrating refrigeration recovery with the existing refrige rator was proposed. In April 2008\, funding was given to execute the proj ect. After completing the process studies\, the mechanical design is now underway. The purpose of the modification is to recover the available ref rigeration from the 20-K target return\, resulting in reduced 4.5-K helium required from the CHL. In addition\, these modifications are anticipated to result in an ESR input power reduction for present target loads and th e capability to support the 2500 W 15 K Qweak target load.\n\nhttp://indic o.cern.ch/contributionDisplay.py?contribId=3&sessionId=7&confId=26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=3&sessionId=7&c onfId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:Unicos upgrade project of the CERN obsolete cryogenics control sys tems DTSTART;VALUE=DATE-TIME:20080924T140000Z DTEND;VALUE=DATE-TIME:20080924T142500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-2@cern.ch DESCRIPTION:Speakers: Mr. PEZZETTI\, Marco (CERN)\nThe cryogenic infrastru cture at CERN was originated in the 1960s by bubble chambers and the assoc iated superconducting solenoids. Since then\, complex cryoplants have been installed to provide cooling power from 400 W to 18 kW at 4.5 K\, requiri ng high technical capabilities from the control system. The LHC cryogenics has recently adopted the CERN standard control framework UNICOS in order to enhance ease of operation and maintenance and to provide long-term dura bility. After the completion of the LHC construction\, CERN has undertaken a large project for the upgrade of the obsolete control system (total of 15) of helium cryoplants cooling superconducting magnet of various CERN de tectors as well as large cryogenic test facilities. This paper describes t he technical procedure used in order to meet the technological challenge i n term of installation constraint\, reduced manpower and minimal costs. So me examples are given.\n\nhttp://indico.cern.ch/contributionDisplay.py?con tribId=2&sessionId=8&confId=26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=2&sessionId=8&c onfId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:Safety aspects concerning the operation of liquid krypton and liqu id argon calorimeters in underground areas DTSTART;VALUE=DATE-TIME:20080923T140000Z DTEND;VALUE=DATE-TIME:20080923T142500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-5@cern.ch DESCRIPTION:Speakers: Dr. BREMER\, Johan (CERN)\nThe operation of particle physics calorimeters using large quantities of liquid krypton or liquid a rgon in underground areas creates specific safety risks because of conflic ting requirements. On one hand the walls of the cryostats\, including elec trical feedthroughs\, must be as thin as possible to minimize the interac tion of the particles passing through the structure\, while on the other h and the risk of an eventual loss of krypton or argon must be avoided since it will give rise to an oxygen deficiency in the underground cavern.\nA 1 0 m3 liquid krypton and a 85 m3 liquid argon calorimeter are installed at CERN in underground caverns. This presentation will focus on the measures taken to have an early detection of an eventual loss of cryogenics and on how to diminish the consequence of such a leak for its environment.\n\nhtt p://indico.cern.ch/contributionDisplay.py?contribId=5&sessionId=6&confId=2 6935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=5&sessionId=6&c onfId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:Continuous operation of liquefied noble gas calorimeters at CERN DTSTART;VALUE=DATE-TIME:20080923T093000Z DTEND;VALUE=DATE-TIME:20080923T095500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-4@cern.ch DESCRIPTION:Speakers: Dr. BREMER\, Johan (CERN)\nTwo experiments at CERN a re demanding the continuous cooling (24h/24h\, 365 days/year) of liquefied noble gas calorimeters: the NA48 experiment equipped with a 10 m3 liquid krypton calorimeter and the ATLAS experiment equipped with a 85 m3 liquid argon calorimeter housed in three independent cryostats.\nThis presentatio n will focus on the design principles applied to allow for this highly dem anding operation condition and on the experience gathered with these two c ryogenic systems.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribI d=4&sessionId=3&confId=26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=4&sessionId=3&c onfId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:The Control System for the cryogenics in the LHC tunnel DTSTART;VALUE=DATE-TIME:20080924T120000Z DTEND;VALUE=DATE-TIME:20080924T122500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-7@cern.ch DESCRIPTION:Speakers: Dr. GOMES\, Paulo (CERN)\nThe cryogenics process aut omation of each of the 8 LHC sectors is based on 2 Siemens-S7® Programmab le Logic Controllers (PLC)\, each running 250 closed control loops\, 300-5 00 alarms and interlocks\, and the process phase sequencer. \n\nDistribute d along the LHC circumference\, 15 000 cryogenic sensors and actuators are accessed through industrial field networks (Profibus® and WorldFIP®)\, running through optical fibres\, copper cables and signal repeaters.\n\nTh is presentation describes the main hardware and software components of the control system for the LHC tunnel cryogenics\, together with their human interfaces and tools for operation and diagnosis.\n\nhttp://indico.cern.ch /contributionDisplay.py?contribId=7&sessionId=8&confId=26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=7&sessionId=8&c onfId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:SPIRAL2 Cryogenic System DTSTART;VALUE=DATE-TIME:20080924T093000Z DTEND;VALUE=DATE-TIME:20080924T095500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-6@cern.ch DESCRIPTION:Speakers: Mr. SOULI\, Mehdi (GANIL/IN2P3\, CNRS)\nSPIRAL2 is a rare isotope accelerator which will based at GANIL\, it is dedicated for the production of high intensity radioactive beams (E=40Mev\, I=5mA). The driver of SPIRAL2 is a Linac\, it uses bulk niobium superconducting RF cav ities cooled with liquid helium. The cryogenic transfer line of the Linac is composed of about 20 valves boxes which su[[ly two types of helium cryo genic lines: The first at T=4.2K to feed the cavities and the second at T= 60K for the thermal shield of the cryomodules. The refrigerator of the cry ogenic installation must evacuate a total heat loss of about 1kW at T=4.2K and 2.5kW at T=60K. In this presentation\, the SPIRAL2 cryogenic installa tion design will be detailed and its different operation modes will be des cribed. The preliminary cryogenic experimental test results of the first c ryomodule B at IPN ORSAY will be also presented and interpreted.\n\nhttp:/ /indico.cern.ch/contributionDisplay.py?contribId=6&sessionId=7&confId=2693 5 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=6&sessionId=7&c onfId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:The liquid nitrogen system for chamber A: a change from forced flo w to a natural flow (thermo siphon) system DTSTART;VALUE=DATE-TIME:20080925T070000Z DTEND;VALUE=DATE-TIME:20080925T072500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-9@cern.ch DESCRIPTION:Speakers: Mr. HOMAN\, Jonathan (NASA-Johnson Space Center)\, D r. SIDI-YEKHLEF\, Ahmed (Jefferson Laboratory)\nNASA at the Johnson Space Center (JSC) in Houston is presently working toward modifying the origina l forced flow liquid nitrogen cooling system for the thermal shield in the environmental control chamber-A (65’ dia x 120’ high) to work as a na tural flow (thermo siphon) system. The new thermo siphon system will impro ve the reliability\, stability\, and operating temperature while reducing the amount of liquid nitrogen used to operate the system.\n\nThis paper wi ll present the requirements for the various operating modes. System level thermodynamic comparisons of the existing system to the various options s tudied and the selected option. A thermal and hydraulic analysis used to validate the selected option for the conversion of the current design will be discussed. The modifications to the existing system as well as design features that improve the operations and maintenance will be presented.\n\ nhttp://indico.cern.ch/contributionDisplay.py?contribId=9&sessionId=10&con fId=26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=9&sessionId=10& confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:Floating pressure conversion and equipment upgrades of two 3.5KW\, 20K\, helium refrigerators DTSTART;VALUE=DATE-TIME:20080924T090000Z DTEND;VALUE=DATE-TIME:20080924T092500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-8@cern.ch DESCRIPTION:Speakers: Mr. HOMAN\, Jonathan (NASA-Johnson Space Center)\, D r. SIDI-YEKHLEF\, Ahmed (Jefferson Laboratory)\nTwo helium refrigerators\, each rated for 3.5KW at 20K\, are used at NASA’s Johnson Space Center ( JSC) to provide cryo-pumping within two large thermal-vacuum chambers. Th ese refrigerators were originally commissioned in 1996. Equipment refurbi shment and upgrades of the controls of these refrigerators were recently c ompleted. This paper describes some of the mechanical and control issues t hat necessitated the equipment refurbishment and controls change-over. It will describe the modifications and the new process control which allows t he refrigerators to take advantage of the Ganni Cycle “floating pressure ” control technology. \n\nThe upgrades have greatly improved the perform ance\, stability\, and efficiency of these two refrigerators. The upgrade s have also given the operators more information and details about the ope rational status of the main components (compressors\, expanders etc.) of t he refrigerators at all operating conditions (i.e.\, at various loads in t he vacuum chambers). \n\nCapabilities\, configuration\, and performance d ata pre\, and post\, upgrading will be presented.\n\nhttp://indico.cern.ch /contributionDisplay.py?contribId=8&sessionId=7&confId=26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=8&sessionId=7&c onfId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:The procurement and distribution of cryogens for LHC DTSTART;VALUE=DATE-TIME:20080923T123000Z DTEND;VALUE=DATE-TIME:20080923T125500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-11@cern.ch DESCRIPTION:Speakers: Mr. BARTH\, Klaus (CERN)\nCERN is a large user of in dustrially procured cryogens essentially liquid helium and nitrogen.\nRece nt contracts have been placed by the Organization for the delivery of quan tities up to 320 tons of liquid helium and up to 70’000 tons of liquid n itrogen\, both over a four years operational period. Main users are the ve ry large cryogenic system of the LHC accelerator complex\, the physics det ectors using superconducting magnets and liquefied gases and all the relat ed test facilities whether industrial or laboratory scale. The initial coo l down of LHC requests the supply of in total 10’000 tons of liquid nitr ogen to be delivered in batches of 1’250 tons for each of the 8 sectors. For the operation of LHC\, a total helium inventory of 130 tons will be n eeded\, of which up to 75 tons can be stored in situ in gaseous or liquid storage tanks. During maintenance shutdowns up to 55 tons might have to be stored at suppliers premises in collaboration with the industrial contrac tors. The presentation reviews the procurement and distribution strategy f or liquid helium and nitrogen\, including delivery rates\, distribution me thods and adopted safety standards.\n\nhttp://indico.cern.ch/contributionD isplay.py?contribId=11&sessionId=5&confId=26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=11&sessionId=5& confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:Web-based tool for reporting operational non-conformities and trac king associated corrective actions DTSTART;VALUE=DATE-TIME:20080924T123000Z DTEND;VALUE=DATE-TIME:20080924T125500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-10@cern.ch DESCRIPTION:Speakers: Mr. BALLE\, Christoph (CERN)\nThe cryogenic instrume ntation of the LHC-machine includes 15000 sensors and actuators. In the fi rst phase of the hardware commissioning of the accelerator the correct fun ctioning of the measuring channels was checked\, while in the second phase the operation-team did a fine-tuning of the cryogenic system based on the acquired measurements. For this purpose and when running the machine in t he future\, a quality assurance (QA)-tool for the operators and the instru mentation & controls-team had to be make available. The principle specific ations of such a tool includes: tracking all operational non-conformities\ , resultant consequences and associated corrective actions\, user-friendli ness\, delete-protection and well-defined accessibility.\nThe present pape r describes how we coped with those requirements\, the experiences made an d an outlook for prospective upgrades.\n\nhttp://indico.cern.ch/contributi onDisplay.py?contribId=10&sessionId=8&confId=26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=10&sessionId=8& confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:Presentation of the visits of Friday 26th September DTSTART;VALUE=DATE-TIME:20080925T150000Z DTEND;VALUE=DATE-TIME:20080925T151500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-39@cern.ch DESCRIPTION:Speakers: Ms. GARDETTE\, Sophie (CERN)\nPresentation of the vi sits of Friday 26th September\n\nhttp://indico.cern.ch/contributionDisplay .py?contribId=39&sessionId=11&confId=26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=39&sessionId=11 &confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:Tools for the maintenance of Siemens PLCs and associated Profibus ® fieldbuses and intelligent instrumentation DTSTART;VALUE=DATE-TIME:20080924T133000Z DTEND;VALUE=DATE-TIME:20080924T135500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-12@cern.ch DESCRIPTION:Speakers: Mr. TOVAR-GONZALEZ\, Antonio (CERN)\nSeveral tools h ave been developed to assist on the maintenance and diagnostics of the LHC control hardware. These tools run independently of the control infrastruc ture\, do not require any particular computer configuration and are quite fast to load and run.\n\nTwo real-time tools based on TCP/IP communication between a PC and Siemens PLCs are implemented:\n- PLCdiag: shows the stat us of all Siemens CPUs and associated Profibus master and slaves\, allowin g a fast diagnostics of the cryogenics control system.\n- FastTrend: a mul ti variable real-time (50 ms refresh rate) visualization of instrumentatio n readings and other PLC data.\n\nAn offline tool for data visualization:\ n- "MultiGraph" is a multi-variable bar-graph animator\, with adjustable t ime frame\, that reads data directly from excel files\; a future version m ight retrieve data from the LHC logging system.\n\nhttp://indico.cern.ch/c ontributionDisplay.py?contribId=12&sessionId=8&confId=26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=12&sessionId=8& confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:Registration Particpants CryoOps 2008 DTSTART;VALUE=DATE-TIME:20080922T120000Z DTEND;VALUE=DATE-TIME:20080922T140000Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-15@cern.ch DESCRIPTION:Speakers: \nhttp://indico.cern.ch/contributionDisplay.py?contr ibId=15&confId=26935 LOCATION:CERN Room A URL:http://indico.cern.ch/contributionDisplay.py?contribId=15&confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:Welcome Reception CryoOps 2008 DTSTART;VALUE=DATE-TIME:20080922T140000Z DTEND;VALUE=DATE-TIME:20080922T153000Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-14@cern.ch DESCRIPTION:Speakers: \nhttp://indico.cern.ch/contributionDisplay.py?contr ibId=14&confId=26935 LOCATION:CERN Pas perdus URL:http://indico.cern.ch/contributionDisplay.py?contribId=14&confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:Workshop Dinner DTSTART;VALUE=DATE-TIME:20080924T170000Z DTEND;VALUE=DATE-TIME:20080924T210000Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-17@cern.ch DESCRIPTION:Speakers: \nhttp://indico.cern.ch/contributionDisplay.py?contr ibId=17&confId=26935 LOCATION:CERN Globe of Science and Innovation URL:http://indico.cern.ch/contributionDisplay.py?contribId=17&confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:Visit of CERN sites DTSTART;VALUE=DATE-TIME:20080926T062000Z DTEND;VALUE=DATE-TIME:20080926T103000Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-16@cern.ch DESCRIPTION:Speakers: \n1/ Visit of Point 18\n- SM18 \n- Pt18\n\n2/ Visit of the CCC: CERN Control Center\n- CCC\n\n3/ Visit of Point 8\n- Point 8\n \nhttp://indico.cern.ch/contributionDisplay.py?contribId=16&confId=26935 LOCATION:CERN CERN Reception Meyrin Site Bldg. 33 URL:http://indico.cern.ch/contributionDisplay.py?contribId=16&confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:Description of the flexible large scale Cryogenic test facility at CEA Grenoble and various test experiments connected over the past years DTSTART;VALUE=DATE-TIME:20080924T073000Z DTEND;VALUE=DATE-TIME:20080924T075500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-19@cern.ch DESCRIPTION:Speakers: Mr. ROUSSEL\, Pascal (CEA Grenoble)\nThis test facil ity at CEA Grenoble mainly consists of an helium refrigerator whose flexib le operation permits various types of experiments or test benches to be co upled to it. This presentation first introduces the qualification of the p erformances of our helium refrigerator\, able to cover a wide range of tem perature\, from 1.5K to 4.5K. Then we describe through several experiments successively connected to our test facility the possible configurations o f this cryogenic test facility.\nIndeed we can cool down the experiment by a direct flow pumped by the refrigerator cold compressors producing super fluid helium as in the “cryoloop” experiment where we carried out ther mohydraulics studies with two phases flow superfluid helium at 1.8K for L HC. Other possible connection is to use a heat exchanger immersed in the r efrigerator superfluid helium bath to cool down a circulating loop. \nThis separate loop allows to adjust pressure mass flow and temperature in an i ndependent way This was done for Turbulence studies in HeII and also in H e I performed thanks to high Reynolds numbers achieved in this circulating loop.\nThe next step will allow to study the efficient pulsed loads smoot hing\, specific to tokamak (JT60SA and ITER) operation by testing a superc ritical helium circulation loop in various operating conditions.\n\nhttp: //indico.cern.ch/contributionDisplay.py?contribId=19&sessionId=7&confId=26 935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=19&sessionId=7& confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:Helium liquefaction and distribution at TIFR\, Mumbai\, INDIA DTSTART;VALUE=DATE-TIME:20080925T073000Z DTEND;VALUE=DATE-TIME:20080925T075500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-18@cern.ch DESCRIPTION:Speakers: Mr. SRINIVASAN\, K V (Tata Institute of Fundamental Research)\nThe low temperature facility (LTF) of Tata Institute of Fundame ntal Research\, (TIFR) Mumbai\, India\, has been operating and maintaining helium liquefiers and nitrogen generators for more than four decades. Fo r the past sixteen years\, helium is liquefied in KOCH’s model 1610S hel ium liquefier (production during 2007: 60000 ltrs). A new helium liquefier (Linde L280) has been recently commissioned in June 2008. The facility al so produces liquid nitrogen using a LINIT-25 and occasionally a Philips mo del PLN-430 plant with air separation column. \n\nLiquid helium is dispens ed to about 37 research laboratories including dilution refrigerator\, adi abatic de-magnetization (for development of micro-kelvin refrigerator) and three NMR spectrometers. Many systems are kept cold continuously. TIFR ha s a large network of helium gas recovery lines (~1.6 km) and our recovery rate is about 80% to 85%.\n\nWe will present our experience in helium liqu efier operation and maintenance\, highlighting aspects such as: improved m ethod to operate purifier with pre-cooling in impure mode\, liquefier deco ntamination with quick and simple method\, cold box vacuum valve modificat ion\, recovery of liquefier blow down helium gas\, shifting-re-installatio n and commissioning of KOCH liquefier in ten days\, repair and revival of cryogenic dewars\, development of ‘on-line’ cryogen request form\, hel ium gas accounting methods etc. Some details related to the recent install ation of a helium liquefier (Linde L-280\, including 5000 liters storage d ewar with submersible liquid pump)\, which resulted in efficient commissio ning within two weeks\, will also be discussed.\n\nhttp://indico.cern.ch/c ontributionDisplay.py?contribId=18&sessionId=10&confId=26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=18&sessionId=10 &confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:The ITER cryogenic system overview DTSTART;VALUE=DATE-TIME:20080925T113000Z DTEND;VALUE=DATE-TIME:20080925T115500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-31@cern.ch DESCRIPTION:Speakers: Mr. HENRY\, Denis (ITER Organization)\nThe ITER (Int ernational Thermonuclear Experimental Reactor) cryogenic system is in its final design phase to be constructed at Cadarache\, South of France. With a refrigeration capacity equivalent to 65 kW at 4.5 K distributed via comp lex and compact cryogenic distribution system it will represent the next l arge scale cryogenic installation to go into operation in the next decade. \nThe refrigeration capacity equivalent to 65 kW at 4.5 K is distributed f or the cooling of superconducting magnets\, their HTS current leads and sm all users. It includes also the cooling and regeneration in sequence of th e cryogenic pumps. A 1300 kW nitrogen plant cools the 80 K thermal shields . The key design requirement is the capability to cope with large pulsed h eat loads deposited in the magnets due to magnetic field variations and ne utron production from the fusion reaction.\nITER is designed to be operate d 365 days per year in order to optimize the available time of the Tokamak . It is foreseen to operate continuously for up to two weeks with short ma intenance periods of few days. Major shutdown will take place only every 1 6 months for routine maintenance of Tokamak and plant system installations .\nAfter recalling the basic features we will present the expected perform ances and requirements for operation and maintenance of the cryogenic inst allations.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=31&se ssionId=11&confId=26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=31&sessionId=11 &confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:Design remodeling of warm helium screw compressor skid assembly DTSTART;VALUE=DATE-TIME:20080925T143000Z DTEND;VALUE=DATE-TIME:20080925T145500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-36@cern.ch DESCRIPTION:Speakers: Mr. ARENIUS\, Dana (Jefferson Laboratory)\, Mr. DIXO N\, Kelly (Jefferson Laboratory)\nA good portion of the typical helium r efrigeration system inefficiency is attributed to the warm helium compres sor subsystem. Much of the current helium refrigeration system efficienc y improvement R+D centers on the refrigerator components which extract the energy from the gas but very little is research and development has gone into the portion of the system in which the energy is being put into the cycle. With rapidly rising utility costs and raw materials such as carbo n steel\, the continued optimization of helium compression systems in term s of performance and equipment cost has never been greater. An overview of the Jefferson Lab’s redesign activity in cooperation with industry wi ll be presented.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId =36&sessionId=11&confId=26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=36&sessionId=11 &confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:JT60 SA : Baking scenarios studies DTSTART;VALUE=DATE-TIME:20080925T140000Z DTEND;VALUE=DATE-TIME:20080925T142500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-35@cern.ch DESCRIPTION:Speakers: Mrs. LAMAISON\, Valérie (CEA Cadarache)\nPerforming high quality plasma requires “clean” vacuum vessel obtained by freque nt bakings. Baking consists of heating the vacuum vessel to 473K for sever al days. This operation requests a particular operational mode of the cryo genic system. Because of the increase of radiation heat loads on thermal s hields\, the helium mass flow in 80K cryogenic circuits should increase of 50%. \nTo avoid an over capacity of the cryogenic plant\, different scena rios are studied in order to reduce mass flow during baking. \nDepending o n the durations of the baking and the associated cool down conditions\, an optimisation of this operational mode must be carried out considering the total mass flow\, the repartition at low and middle pressure in the warm compression station and electrical consumption.\n\nhttp://indico.cern.ch/c ontributionDisplay.py?contribId=35&sessionId=11&confId=26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=35&sessionId=11 &confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:Focus of Jefferson Laboratory’s Collins Cryogenic Institute Rese arch and Development DTSTART;VALUE=DATE-TIME:20080925T093000Z DTEND;VALUE=DATE-TIME:20080925T095500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-34@cern.ch DESCRIPTION:Speakers: Mr. ARENIUS\, Dana (Jefferson Laboratory)\nRecognize d as a key core laboratory technology\, Jefferson Lab established the Coll ins Cryogenic Institute in 2006 to complement its other research areas inc lusive of SRF technology. Combining graduate engineering degree thesis work with applied research and development of helium refrigeration techno logy\, the Institute’s focus areas include improved process cycles\, hig her system efficiencies (lower utility requirements)\, lower capital equip ment cost\, higher reliability\, and lower maintenance. In collaborative partnership with research laboratories\, industry\, national programs\, a nd educational institutions\, the collaborations includes a wide range of helium plant capacities\, applications and temperatures. Special attenti on is paid to development of solutions to current technical problems and f uture applications that can not be addressed by a single organization due to the lack of R+D funding or technology base in specific areas. This inc ludes solutions for energy and helium gas conservation to curb ever increa sing utility and helium costs and preservation of natural resources. An ov erview of the range of the current research and development activities con ducted by the institute\, along with findings\, will be presented.\n\nhttp ://indico.cern.ch/contributionDisplay.py?contribId=34&sessionId=10&confId= 26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=34&sessionId=10 &confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:Overview of the 12 GeV cryogenic system upgrade at Jefferson Labor atory DTSTART;VALUE=DATE-TIME:20080925T123000Z DTEND;VALUE=DATE-TIME:20080925T125500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-33@cern.ch DESCRIPTION:Speakers: Mr. ARENIUS\, Dana (Jefferson Laboratory)\nAs part o f the planned Jefferson Laboratory’s electron accelerator (CEBAF) power upgrade\, ten additional superconducting RF cryomodules will be added to i ts accelerator linacs. Although physically the same size as each of the o riginal 40 linac cryomodules\, each new cryomodule will have approximately 4 times the acceleration power. To support the new additional cryomodule heat loads generated the existing 2K\, 4600W Central Helium Liquefier (CH L) plant capacity will be doubled to a total of 9200W at 2K plus 24\,000W at 35K for shield loads. The specified base line process cycle has been m odeled after the laboratory’s “Ganni Helium Cycle” process technolo gy. In addition\, a fourth physics experimental “Hall D” will be con structed which will have an additional stand alone 200W at 4K helium cryog enic plant. While the project is currently in the engineering project pha se\, the construction project phase (CD-3) is scheduled to begin in Octobe r of 2008. An overview of the planned cryogenic systems and current desig n baseline as it relates to operations will be presented.\n\nhttp://indico .cern.ch/contributionDisplay.py?contribId=33&sessionId=11&confId=26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=33&sessionId=11 &confId=26935 END:VEVENT BEGIN:VEVENT SUMMARY:Overview of cryogenics operations at DESY DTSTART;VALUE=DATE-TIME:20080925T120000Z DTEND;VALUE=DATE-TIME:20080925T122500Z DTSTAMP;VALUE=DATE-TIME:20130519T165359Z UID:indico-contribution-26935-32@cern.ch DESCRIPTION:Speakers: Mr. HERZOG\, Hermann (Linde Kryotechnik AG\, c/o DES Y Hamburg)\nDESY has a long tradition on Cryogenics. Each of the three ref rigerators of the HERA cryogenic plant\, being used at the DESY Laboratory in Hamburg\, Germany\, has a cooling capacity of 6.5kW at 4.4K and 20kW a t 40K-80K.Operating and maintenance was led by a mixed group of operators/ experts and under LINDE KRYOTECHNIK AG supervision. We describe the cryoge nic installations\, how they operated and experiences we have made over th e past years.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=32 &sessionId=11&confId=26935 LOCATION:CERN Council Chamber URL:http://indico.cern.ch/contributionDisplay.py?contribId=32&sessionId=11 &confId=26935 END:VEVENT END:VCALENDAR