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Mr Francis Perez (ALBA)04/05/2010, 09:30ALBA RF systemGo to contribution page
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Dr patrick marchand (Synchrotron-SOLEIL)04/05/2010, 10:00OPERATIONAL EXPERIENCE WITH THE SOLEIL 352 MHZ RF SYSTEMS Patrick Marchand, on behalf of the SOLEIL RF group The 352 MHz RF accelerating systems for the SOLEIL Booster (BO) and Storage Ring (SR) are in operation since mid 2006. In the BO, a 5-cell copper cavity of the CERN-LEP type is powered with a 35 kW solid state amplifier. In the SR, the required RF accelerating voltage (up to 4.4...Go to contribution page
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Sergey Belomestnykh (Cornell University)04/05/2010, 11:00Two accelerator facilities at Cornell University use CW superconducting RF systems: Cornell Electron Storage Ring (CESR) and ERL injector prototype. The CESR RF operates at 500 MHz and employs two high power klystrons and four single-cell superconducting cavities. The 1300 MHz ERL injector system has six klystron transmitters and one IOT-based transmitter feeding five superconducting 2-cell...Go to contribution page
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Mr Doug Horan (Argonne National Laboratory)04/05/2010, 11:30Performance of the Advanced Photon Source 352-MHz rf systems will be described, with emphasis on system reliability and related hardware issues. Recent failures involving high-voltage capacitors and cavity input couplers will be discussed. Methods employed to minimize klystron-related downtime will be described.Go to contribution page
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Dr Shigeki Sasaki (JASRI/SPring-8)04/05/2010, 13:30The RF system of the booster synchrotorn and of the storage ring at SPring-8 is equipped with 1MW CW klystrons. For the booster two klystrons are used and the phase between the two klystrons are changed accorging to the ramping up of the electron energy from 1 GeV to 8 GeV in order to form the accelerating voltage by the vector sum of the two outputs. The power produced by the 2 klystrons are...Go to contribution page
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Thomas Hardek (ORNL)04/05/2010, 14:00The SNS has been delivering production neutrons for four years. First beam was delivered to the neutron target at the end of April 2006. On September 18, 2009 SNS officially reached 1 megawatt of beam on target marking the achievement of a decades-old dream of delivering a mega-watt class pulsed spallation source in the U.S. The present effort is aimed at routinely delivering 1 megawatt of...Go to contribution page
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Mr Kenneth Baptiste (Lawrence Berkeley National Laboratory)04/05/2010, 14:30The Advanced Light Source (ALS) is a 3rd generation light source operating in her 17th year and is in the midst of a vigorous series of upgrades including Top-Off, Magnet PS’s, SRRF, Insertion Devices, Control System & Diagnostics that will keep ALS near the forefront in its specific synchrotron radiation regime. The Storage Ring RF is being upgraded over the next three years to meet a modest...Go to contribution page
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Mr MArco DI GIACOMO (CEA/GANIL/SPIRAL2)04/05/2010, 15:30The high current driver accelerator of the SPIRAL 2 project uses independently phased resonators working at 88 MHz. One RFQ, three normal conducting rebunchers and twelve and fourteen SC cavities of two different families have to be driven with amplifiers ranging from few to tens of kW, for a total installed RF power up to 750 kW. Solid state power amplifiers equipped with circulators are...Go to contribution page
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Mr Daniel Valuch (CERN)04/05/2010, 16:00Operation experience with the LHC RF systemGo to contribution page
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Mr Tom Powers (Jefferson Lab)04/05/2010, 16:30Jefferson Lab (JLab) is proposing JLAMP (JLab AMPlifier), a 4th generation light source covering the range 10–100 eV in the fundamental mode with harmonics stretching towards the oxygen k-edge. The scientific purpose is to study ultrafast dynamics in complex systems as a pathway to the understanding and creation of novel materials and devices. The machine will be based on an energy upgrade to...Go to contribution page
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multiple authors05/05/2010, 08:30
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Mr James Rose (Brookhaven)05/05/2010, 09:30Various methods of measuring RF amplitude and phase jitter and time correlated DC power supply variations are presented. A simple setup using a 4 channel scope as a digitizer is described. Measurements of the DC power supply variations and correlated RF amplitude and phase jitter of the klystron amplifier and SRF cavity fields for the Canadian Light Source are presented and the results summarized.Go to contribution page
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Joseph Lu (TRIUMF)05/05/2010, 10:00In TRIUMF, the Eimac power tetrode vacuum tube 4CW100,000 (or 4CW150,000) is used in 3 amplifier systems. It is also used in Nordion, a medical isotope production company with collaboration with TRIUMF, in its TR-30 phase II amplifier system. In addition, the power tetrode 4CW50,000, which uses the same socket as 4CW100,000, is used in Nordion TR-30 phase I amplifier system. A test stand is...Go to contribution page
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Mark Middendorf (ORNL)05/05/2010, 11:00The original SNS baseline installation included six 20kWpk vacuum tube power amplifiers (four online amplifiers and two ready spares, manually interchangeable) to drive the four rebuncher cavities that are part of the Medium Energy Beam Transport (MEBT) structure. We are in the process of replacing the six vacuum tube amplifiers with five commercially-available 25kWpk solid-state amplifiers...Go to contribution page
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Dr Daniel Valuch (CERN)05/05/2010, 11:30The 400MHz/300kW LHC klystrons are powered by 58kV DC supply. The klystron cathode current is controlled by a means of "modulation anode (MA)". Variation of the MA potential between 5kV and 35kV provide klystron current regulation from zero up to the nominal 9A. A high voltage tetrode (Thomson TH5186) used in the klystron modulator allows to control the MA voltage. Many of the currently used...Go to contribution page
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Mr Slawomir Kwiatkowski (LBNL)05/05/2010, 13:30The 88-Inch Cyclotron is operated as a national facility in support of U.S. Department of Energy programs in basic nuclear science. The RF system of the cyclotron is based on the quarter-wave cantilever type resonating structure powered by 500kW 4648 RCA RF tetrode operating in grounded cathode configuration. The resonance frequency range of the RF system is 5.5MHz to 16.5MHz. Prohibitive...Go to contribution page
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Mr Arthur Grelick (Argonne National Laboratory)05/05/2010, 14:00The proposed baseline design for the addition of short X-ray pulses at a sector of the Advanced Photon Source (APS) storage ring called for 20 superconducting deflecting cavities, each excited with 5 kW cw at 2815.5 MHz, which is the 8th harmonic of the storage ring frequency. A klystron amplifier has been designed based on a best effort, reduced power, engineering sample tube. The initial...Go to contribution page
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05/05/2010, 14:30The European XFEL project at DESY in Germany requires 27 RF stations capable of 10 MW RF power each. Each RF station needs one high voltage modulator that generates pulses up to 12 kV and 2 kA with a duration of 1.7 ms and a nominal repetition rate of 10 Hz. DESY decided to investigate new modulator prototypes and Thomson has been awarded to design and build one of these prototype...Go to contribution page
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Paco Sanchez (CELLS)06/05/2010, 08:30
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Mr Jean-Paul ABADIE (ELTA-AREVA)06/05/2010, 09:30ELTA is an AREVA subsidiary specialized in Radiofrequency Equipments and High Power Supplies for Aeronautics, Nuclear and Scientific applications. In the frame of the upgrade of RF Power Amplifiers currently in operation at ESRF Booster (BO) and Storage Ring (SR), ELTA is in charge of the design and manufacturing of seven 150 kW SSA operating at 352 MHz . This 150kW SSA is based on the...Go to contribution page
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Mr Doug Horan (Argonne National Laboratory)06/05/2010, 10:00An investigation into the feasibility of utilizing solid-state rf power systems to replace the existing 352-MHz klystron-based rf power systems for the Advanced Photon Source booster and storage ring rf systems was started. Data from tests conducted on a dual-transistor/single-package LDMOS device capable of 1kW CW rf output at 352MHz will be discussed. Design details and test data for a...Go to contribution page
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Ti Ruan (Synchrotron-SOLEIL)06/05/2010, 11:00The required RF power for the SOLEIL Booster and Storage ring is provided using 352 MHz solid state amplifiers (1 x 35 kW and 4 x 190 kW). They consist in a combination of a large number of 330 W amplifier modules (1 x 147 and 4 x 726), based on a design developed in house, with LDMOS transistors, integrated circulators and individual power supplies. After about four years of running, the...Go to contribution page
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Hartmut Büttig (Research Center Dresden-Rossendorf)06/05/2010, 11:30The prototype of a "tunk key" 10kW@1.3GHz solid state power amplifier, designed and built by Bruker BioSpin Wissembourg/France has been tested at the superconducting linac ELBE in the Research Center Dresden-Rossendorf. The talk gives an overview on the design, its RF-parameters and the first 8-week period of test and operation at the superconducting CW-linac ELBE.Go to contribution page
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Mr Michel LANGLOIS (ESRF)06/05/2010, 13:30Cavity combiners have been used before: at ALBA, for instance, 2 IOTs add their output power in such a device to drive one storage ring accelerating cavity. Their main advantages lie in the minor footprint when compared to hybrid couplers and their capability to accept a large number of feeders. This makes them ideally suited for high power transistor amplifiers, where many pallets have to be...Go to contribution page
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Mr Jean-Maurice MERCIER (ESRF)06/05/2010, 14:00As presented in detail at the CWRF’2008 workshop, the ESRF RF system will undergo a major upgrade, klystrons being replaced with high power solid state amplifiers (SSA) and existing five-cell cavities of the storage ring with strongly HOM damped single cell cavities. The company ELTA, who has a technology transfer contract with SOLEIL, was selected to produce the first batch of seven 150 kW...Go to contribution page
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Dr Nikolai Schwerg (CERN)06/05/2010, 14:30The LHC accelerating RF system merely consists of a 300 kW klystron, a 3-port circulator, a superconducting cavity and an RF load. The resonance of the superconducting structure is strongly influenced by the external RF system. The loaded Q, i.e. the external quality factor of the cavity, therefore also depends on the reflection of the circulator. The circulators are equipped with a...Go to contribution page
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Dr Valery Katalev (DESY)06/05/2010, 15:30The linear accelerator for the Free Electron Laser in Hamburg (FLASH) contains fifty six superconducting cavities grouped into seven cryogenic modules and one normal conducting RF gun. The five RF stations using 5MW single beam and a 10MW multibeam klystrons supply the cryogenic modules and the gun through the distribution system based on WR650 waveguides. Since FLASH is based on the Tesla...Go to contribution page
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06/05/2010, 16:00Developments in Accelerator High Power RF Distribution.Go to contribution page
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06/05/2010, 16:30Project X and its RF systems.Go to contribution page
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Mr James Rose (Brookhaven)07/05/2010, 09:30The superconducting cavity designed for the Cornell Electron Storage Ring B-Factory (CESR-B) has been successfully adapted for use in synchrotron light sources and are in use at Canadian Light Source, Taiwan LS, Diamond LS, Shanghai LS. The coupling for these systems results in external Q's of ~250,000 to 150,000. For application in new large diameter high brightness light sources such as...Go to contribution page
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Dr Yoon Kang (Oak Ridge National Laboratory)07/05/2010, 10:00High power RF processing of RF components has been performed at the Spallation Neutron Source (SNS) for installation, commissioning, and operations support of its linac accelerating cavity structures. SNS linac employs various types of accelerating structures: the normal conducting RFQ, drift tube linac (DTL), and coupled cavity linac (CCL) cavities and the superconducting RF linac (SCL)...Go to contribution page
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Eric Montesinos (CERN)07/05/2010, 11:00Description of the new CERN-SPL, ESRF and SOLEIL RF power couplers.Go to contribution page
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David Bromberek (Argonne National Laboratory)07/05/2010, 11:30In operation since 2002, the APS 350-MHz cw rf test stand is used primarily for testing and conditioning of storage ring rf cavity components. Successes, failures, and conditioning techniques will be discussed, as well as recent improvements including the implementation of an automated conditioning script, input coupler design modifications, and future plans.Go to contribution page
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