BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:The Two CTF3 Photoinjectors DTSTART;VALUE=DATE-TIME:20090422T140000Z DTEND;VALUE=DATE-TIME:20090422T150000Z DTSTAMP;VALUE=DATE-TIME:20130620T091144Z UID:indico-event-56164@cern.ch DESCRIPTION:CTF3 is a CERN facility built and operated by an international Collaboration\, that aims at demonstrating the feasibility of the main cr itical issues regarding the CLIC concept i.e. two beams acceleration\, hig h gradient and high frequency accelerating structures\, stability of high charge high current electron beams etc.\n\nThe CLIC and CTF3 demand for sh ort electron bunches (few picoseconds) makes of laser driven photoinjector s the natural choice for the source. The flexibility required to temporall y shift the micro-bunch structure contained in a time window of 140 ns (ma cro-bunch) puts even more constraints on the choice of this type of source .\n\nThis latest feature\, called "phase coding"\, is necessary for the mu ltiplication in frequency of the drive beam in the CTF3 delay loop and com biner ring.\n\nTwo photoinjectors have been built in the last years: the d rive beam PHIN photoinjector\, named by the FP6 EU program that provided m ost of the funds to build it in a collaboration between CERN\, RAL\, LAL\, INFN Frascati and INFN Milano. The CALIFES photoinjector\, which provides the seed to the so-called probe beam accelerator\, was built in collabora tion between CEA/DAPNIA\, CERN and LAL.\n\nTwo preliminary tests have been performed on the photoinjectors at the end of 2008. In 2009 the two machi nes are undergoing further test for a more detailed study.\n\nIn this semi nar a brief description of the CTF3 facility will be presented and some in formation will be provided about the design of the photoinjectors and thei r main constituents i.e. laser\, RF gun and photocathodes. Some encouragin g preliminary results from the recent beam tests will be shown.\n\nhttp:// indico.cern.ch/conferenceDisplay.py?confId=56164 LOCATION:CERN 30-7-018 URL:http://indico.cern.ch/conferenceDisplay.py?confId=56164 END:VEVENT BEGIN:VEVENT SUMMARY:FLUKA Models and (CERN) Applications DTSTART;VALUE=DATE-TIME:20090527T140000Z DTEND;VALUE=DATE-TIME:20090527T150000Z DTSTAMP;VALUE=DATE-TIME:20130620T091144Z UID:indico-event-58497@cern.ch DESCRIPTION:In designing and operating accelerators and detectors numerous challenges have to be overcome\, many of which require the application of a particle transport and interaction Monte-Carlo code in various stages. Related issues refer to important safety or machine protection concerns\, the conception and optimization of machine and detector performance\, up t o the final validation of experimental data. For these purposes\, the eval uation of key physical quantities such as energy deposition in the irradia ted components\, dose released in the sensitive elements\, material and en vironmental activation\, and fluence of particles at different locations\, represents an essential ingredient.\nThe quality of the code turns out to be critical for the achievement of the established goals when performing Monte-Carlo calculations (such as by FLUKA) for accelerator applications. This requires an accurate development and benchmarking of the underlying i ndependent physics models\, and their balanced and effective interplay. On ly both constant code development and benchmarking allow for an increasing ly reliable and precise picture of the radiation-matter interaction and re lated processes. A careful and continuous analysis of the Monte-Carlo code in conditions comparable to the actual measurements finally helps not onl y to quantify uncertainties\, but also to reach further improvements.\n\nI n this seminar\, the capabilities of the FLUKA Monte-Carlo code with respe ct to the tasks outlined above are discussed and put in context of the res pective accelerator based activities as well as the embedded physical proc esses. Different applications are illustrated\, mainly concerning CERN pro jects (e.g.\, LHC\, CNGS\, LINAC-4\, and n_TOF) and benchmark measurements (e.g.\, CERF)\, but also other closely connected fields (e.g.\, Hadron-Th erapy). The crucial relationship between the actual application\, the rela ted quantities\, the required physical models and their accuracy\, forms t he centre-line of this seminar\, with all aspects aiming to solve the orig inal problem. The importance of continuous code development and detailed b enchmarking is underlined in order to address not only present\, but also future accelerator challenges.\n\nhttp://indico.cern.ch/conferenceDisplay. py?confId=58497 LOCATION:CERN 30-7-012 URL:http://indico.cern.ch/conferenceDisplay.py?confId=58497 END:VEVENT BEGIN:VEVENT SUMMARY:Towards the next generation of radioactive Ion beam facilities: de sign of the Multi Megawatt Target Station of EURISOL DTSTART;VALUE=DATE-TIME:20090605T090000Z DTEND;VALUE=DATE-TIME:20090605T100000Z DTSTAMP;VALUE=DATE-TIME:20130620T091144Z UID:indico-event-60126@cern.ch DESCRIPTION:Please note unusual day and timeThe European Isotope Separatio n On-Line Radioactive Ion Beam Facility (EURISOL) is set to be the ‘next -generation’ European Isotope Separation On-Line (ISOL) Radioactive Ion Beam (RIB) facility. It will extend and amplify current research in nuclea r physics\, nuclear astrophysics and fundamental interactions beyond the y ear 2010.\n \nIn EURISOL\, four target stations are foreseen\, three direc t targets of approximately 100 kW of beam power and one multi-MW liquid me tal proton-to-neutron converter\, all driven by a high-power particle acce lerator. In the aforementioned multi-MW target assembly\, high-intensity R IBs of neutron-rich isotopes will be obtained by inducing fission in sever al actinide targets surrounding a liquid metal spallation neutron source.\ n \nThis presentation summarises the work carried out for the Multi Megawa tt target station of the EURISOL Design Study with particular attention to the coupled neutronic of the liquid converter and the overall performance of the facility\, which will sustain fast neutron fluxes of the order of 1014 n/cm2/s. The production of radionuclides in the actinide targets as w ell as in the liquid metal are also evaluated\, showing that the targeted 1015 fissions/s can be achieved.\n \nSome of the greatest challenges in th e design are the high power densities\, entailing large structural stresse s\, and the heat removal\, requiring detailed thermo-hydraulics calculatio ns. Some result of a validation experiment of the Coaxial Guided Stream De sign will be presented.\n \nAlternatively\, a windowless target configurat ion has been proposed\, based on a liquid mercury transverse film design. With this design\, higher power densities and fission rates may be achieve d\, also avoiding the technical issues related to the beam window.\n\nhttp ://indico.cern.ch/conferenceDisplay.py?confId=60126 LOCATION:CERN 30-7-012 URL:http://indico.cern.ch/conferenceDisplay.py?confId=60126 END:VEVENT BEGIN:VEVENT SUMMARY:Simulating Transient Effects of Pulsed Beams on Beam Intercepting Devices DTSTART;VALUE=DATE-TIME:20090703T090000Z DTEND;VALUE=DATE-TIME:20090703T100000Z DTSTAMP;VALUE=DATE-TIME:20130620T091144Z UID:indico-event-61695@cern.ch DESCRIPTION:Well focused high intensity particle beams deposit large amoun ts of energy within the material they irradiate. For beam intercepting dev ices (BID)\, where structural integrity and lifetime are important issues\ , it is of interest to understand the dynamic response of the target\, esp ecially for bunched beam time distributions. While the Monte Carlo code FL UKA provides the energy deposited by the particle beam in a static target\ , the explicit hydro-code ANSYS AUTODYN ® is used to model the non-linear dynamic response of the target.\n\nThis talk presents results of simulati ons with ANSYS AUTODYN for liquid and solid targets exposed to pulsed part icle beams at ISOLDE-CERN and GSI.Please note unusual day and time!\n\nhtt p://indico.cern.ch/conferenceDisplay.py?confId=61695 LOCATION:CERN 30-7-012 URL:http://indico.cern.ch/conferenceDisplay.py?confId=61695 END:VEVENT BEGIN:VEVENT SUMMARY:Computational Fluid Dynamics Studies in Cooling of LHC Experiments and Infrastructures DTSTART;VALUE=DATE-TIME:20090710T090000Z DTEND;VALUE=DATE-TIME:20090710T100000Z DTSTAMP;VALUE=DATE-TIME:20130620T091144Z UID:indico-event-63474@cern.ch DESCRIPTION:Computational Fluid Dynamics (CFD) simulations provide assista nce to the LHC machine and detectors during the prototype\, design and dev elopment phases of their components. The bulk of studies performed are mai nly related to the cooling of detector components. However\, a number of s tudies were also developed in areas such as operational safety and room ve ntilation.\n \nThis seminar presents a series of relevant case studies:\n \nThermal behaviour of the ATLAS cavern UX15\nA three dimensional simulati on of full UX15 performed to predict the thermal behaviour and the air flo w distribution around the ATLAS Muon Spectrometer detector when subject to heat dissipation from the chambers. The cooling is obtained thanks to a d edicated cavern ventilation system.\n \nActivated Gas Permanence in the IS OLDE Tunnel - Ventilation System Optimization\nThe main goal of the CFD st udy is to simulate the air flow behaviour inside the experiment area in or der to optimise the ventilation system\, ensuring that leaks of airborne r adioactive contamination are kept within the confined area and so that the activated air is kept long enough for the contamination to decay.\n \nPre vessin Computer Center (CC) cooling\nThe construction of a new computer ce ntre is foreseen in Prevessin for the next future. A study was performed t o help in selection of the proposals of different external firms. The CC d esigns have been verified in terms of cooling efficiency (since one of the most critical point of new CCs is the extremely high density of CPUs) and fulfilment of declared thermal performances of the plants.\n \nATLAS Pixe l Inserted B-Layer (IBL) cooling \nThe current pixel system inner most la yer (B-layer) is expected to reach its radiation dose limit after one year \; the recommended option is actually not a replacement but rather Inserti ng a new B-Layer (IBL) inside the current pixel detector on a smaller beam pipe. CFD simulations are helping in the design of the IBL layout and coo ling system with a series of studies concerning the bake-out phase of the beam pipe. In the next future they will aim to simulate the evaporative co oling process for normal operation.\n\nhttp://indico.cern.ch/conferenceDis play.py?confId=63474 LOCATION:CERN 30-7-012 URL:http://indico.cern.ch/conferenceDisplay.py?confId=63474 END:VEVENT BEGIN:VEVENT SUMMARY:The ISOLDE RILIS: Current Capabilities\, Upgrades and the New Offl ine Development Laboratory (LARIS) DTSTART;VALUE=DATE-TIME:20090717T090000Z DTEND;VALUE=DATE-TIME:20090717T100000Z DTSTAMP;VALUE=DATE-TIME:20130620T091144Z UID:indico-event-63473@cern.ch DESCRIPTION:At ISOLDE radioactive isotopes are produced as the 1.4 GeV pro ton beam of the CERN PSB synchrotron impinges on a thick target. On accoun t of its high efficiency\, speed and unmatched selectivity\, the Resonance Ionization Laser Ion Source (RILIS) is the preferred method for ionizing the nuclear reaction products as they effuse out of the target. By exploi ting the unique electronic energy level ‘fingerprint’ of a chosen elem ent\, the RILIS process of laser step-wise resonance ionization enables an ion beam of high chemical purity to be sent through the mass selective se parator magnet. The isobaric purity of a beam of a chosen isotope is ther efore greatly increased. The RILIS\, comprising of up to three frequency tunable pulsed dye lasers has recently been upgraded with the installation of a Nd:YAG pump laser as a replacement for the old Copper Vapor Laser sy stem. This first phase in the RILIS upgrade has been implemented in conju nction with the construction of a new offline spectroscopy laboratory (LAR IS) which is essential for the smooth implementation of the new laser and for the future development of the RILIS in terms of efficiency\, selectivi ty and applicability. The details of current RILIS system and plans for t he next upgrade phase will be presented\, as will the results of the first in a series of resonance ionization spectroscopy studies performed at the LARIS laboratory.\n\nhttp://indico.cern.ch/conferenceDisplay.py?confId=63 473 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/conferenceDisplay.py?confId=63473 END:VEVENT BEGIN:VEVENT SUMMARY:Motorization and low-level control of the LHC collimators DTSTART;VALUE=DATE-TIME:20091002T090000Z DTEND;VALUE=DATE-TIME:20091002T100000Z DTSTAMP;VALUE=DATE-TIME:20130620T091144Z UID:indico-event-68258@cern.ch DESCRIPTION:The LHC will be protected against uncontrolled beam losses by the collimation system\, which is made of more than 100 collimators each e quipped with two moveable jaws of different materials. The nominal LHC sto red beam energy is 362 MJ\, therefore a great care has been taken in the c hoice\, design and optimization of the low-level control solution. The LHC collimators low level control system manages the position and angle of th e jaws with an accuracy of a few microns\, and monitors the actual positio n against errors with respect to the desired position at a rate of up to 1 00 Hz\, triggering a fast beam dump in case of problems. Stepping motors h ave been chosen to have an accurate open loop positioning\, while LVDTs an d resolvers monitor the axes. The National Instruments PXI platform has be en adopted as real-time low-level hardware. In this seminar the criteria f ollowed in the selection of sensors\, motorization and low-level control p latforms are reviewed. The entire control architecture based on the standa rd LHC controls is presented together with the low-level custom solutions implemented to fulfill the tight project requirements. At the end a detail ed performance review of the entire system is provided.\n\nhttp://indico.c ern.ch/conferenceDisplay.py?confId=68258 LOCATION:CERN TE Auditorium URL:http://indico.cern.ch/conferenceDisplay.py?confId=68258 END:VEVENT BEGIN:VEVENT SUMMARY:Analysis of nanoindentation in copper single crystals and related size effect based on experiments\, crystal plasticity and dislocation dyna mics DTSTART;VALUE=DATE-TIME:20091009T090000Z DTEND;VALUE=DATE-TIME:20091009T100000Z DTSTAMP;VALUE=DATE-TIME:20130620T091144Z UID:indico-event-68262@cern.ch DESCRIPTION:This work deals with experiments and simulations of nanoindent ation in copper single crystals. Indentation experiments are performed wit h different orientations of the indentation axis and both the load-displac ement curve and the surface imprint observed by atomic force microscopy ar e analysed and compared. Simulations are then performed using crystal plas ticity finite element modelling. ABAQUS user subroutines are specially dev eloped in order to account for the physics of dislocation activity in the twelve glide systems of copper crystals. 3D simulations are then performed and comparisons with the experiments give access to key parameters of the constitutive equations. A multiscale approach based on discrete dislocati on dynamics is used to reproduce (111) indentations of copper single cryst als. Molecular dynamics simulations give details of dislocation nucleation beneath the indenter. Dislocation dynamics simulations are then performed and the indentation size effect is addressed. Finally\, the indentation s ize effect is reproduced using a simplified strain gradient theory implant ed in the finite element modelling.\n Keywords: Nanoindentation\, Crystal plasticity\, Finite element method (FEM)\, Dislocation dynamics (DD)\, Mol ecular dynamics (MD)\, Indentation size effect\, Multi-scale simulation\, ABAQUS\, TRIDIS\, CASTEM\n\nhttp://indico.cern.ch/conferenceDisplay.py?con fId=68262 LOCATION:CERN TE Auditorium URL:http://indico.cern.ch/conferenceDisplay.py?confId=68262 END:VEVENT BEGIN:VEVENT SUMMARY:How can the Library help you? How can you help the Library? DTSTART;VALUE=DATE-TIME:20091127T100000Z DTEND;VALUE=DATE-TIME:20091127T110000Z DTSTAMP;VALUE=DATE-TIME:20130620T091144Z UID:indico-event-73865@cern.ch DESCRIPTION:The Library has a wide range of services and resources to offe r you. Among others\, I will highlight "Techniques de l'ingénieur"\, a Fr ench database of scientific and technical information featuring 4\,000 art icles in 11 subject categories\, such as Safety\, Construction\, Materials \, Environmental Engineering.\n\nDiscover how we can help you to identify and obtain the information you need for your work\, and also how you can h elp us to shape our collections so that they better meet your needs.\n\nht tp://indico.cern.ch/conferenceDisplay.py?confId=73865 LOCATION:CERN Kjell Johnsen Auditorium URL:http://indico.cern.ch/conferenceDisplay.py?confId=73865 END:VEVENT END:VCALENDAR