Conveners
Talks Session 3
- Roland Garoby (CERN)
Talks Session 3
- Roland Garoby (CERN)
Description
The Scientific Secretary of this session is Mr. Joachim Tuckmantel
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Mr Brian Chase (FNAL)12/10/2005, 08:30invitedThe SMTF collaboration is constructing a broad-based high-power test facility (HPTF) for superconducting RF modules at Fermilab. The purpose of HPTF is to test pulsed and CW superconducting modules and support systems with and without beam to facilitate progress in SRF. Slated projects are International Linear Collider 1.3 GHz modules, Proton Driver 325 MHz modules and Cornell CW...Go to contribution page
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Dr Dmitry Teytelman (SLAC)12/10/2005, 09:00invitedSuper B-factory designs under consideration expect to reach luminosities in the $10^{35}$ - $10^{36}$ range. The dramatic luminosity increase relative to the existing B-factories is achieved, in part, by significantly raising the beam currents stored in the electron and positron rings. In such machines beam loading effects drive the RF system design. The main effects are the synchronous...Go to contribution page
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Mr Guenter MOELLER (DESY)12/10/2005, 09:20invitedTechnical standard of Downconverters used for Tesla User Facility at DESY - Preview of Board schematic of 8 channel version of Downconverter - Behaviour of linearity, offset, crosstalk and noise parameters - Estimation of accuracy of phase measurement.Go to contribution page
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Mr John Musson (Jefferson Lab)12/10/2005, 09:40invitedSuperconducting Accelerators, worldwide, are appealing to digital Low-Level RF (LLRF) control systems in order to achieve high-precision RF gradient and phase regulation, typically less than 0.1% and 0.01 degrees, respectively. Although mostly digital, these high-performance systems still rely on analog front-end receiver components for down-conversion, amplification, and...Go to contribution page
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Dr Markus Hoffmann (DESY)12/10/2005, 10:00invitedFuture accelerator projects such as the European X-FEL and the International Linear Collider (ILC) will require the operation of the order of 1000 to 10,000 cavities. The operation of these large scale RF systems must be highly automated to guarantee high performance and availability of the linacs. The automation must provide a framework in the accelerator control system such as...Go to contribution page
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Kirk Davis (Jefferson Lab)12/10/2005, 10:50invitedTransient microphonic and Ponderomotive effects have been observed and measured under a number of different operating conditions. Microphonic effects are those sources that are external to the cryomodule, or by devices such as piezo tuners and mechanical tuners. Ponderomotive effects are changes in frequency due to changes in rf field through the Lorentz force. This talk will give...Go to contribution page
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Mr Frank Ludwig (DESY)12/10/2005, 11:10invitedFor a precise detection of the cavity rf-field with a resolution of 0.01 degree (rms) in phase and amplitude smaller then 5 10^-5 (rms), we present a down- converter prototype. The down-converter is designed for a multichannel phase and amplitude readout using an intermediate frequency between 10-100MHz, which is sampled by an ADC. We give an overview of commercial available mixers,...Go to contribution page
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Mr Krzysztof Czuba (DESY Hamburg)12/10/2005, 11:30invitedThe presentation will cover the actual development of the master oscillator (MO) and the frequency distribution system for the UVFEL and the XFEL projects. The MO design issues will be briefly described. The concept of a phase stable signal distribution system based on the RF and fiber-optic solutions will be shown. A long distance signal distribution subsystem with a feedback loop...Go to contribution page
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Tomasz Jezynski (Technical Univ. of Lodz)12/10/2005, 11:50invitedIn order to provide a continuous work of the VUV-FEL and high stable RF field during pulse is necessary to monitor all parameters of the Control System. An advanced algorithms looking for a correlation between data from different subsystems of the LLFR, on-line measure field parameters , produce information about current condition and performance of the LLRF Control System. Diagnostic...Go to contribution page
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Mr John Molendijk (CERN)12/10/2005, 12:10invitedModern Low-Level RF systems rely heavily on digital signal treatment. This evolution has been mainly enabled by the recent availability of powerful FPGAs. Current FPGAs can implement almost all of the signal-treatment requirements e.g. post-mortem and observation memory management, base-band network analyzer functionality, the remote interface to the control systems front-end...Go to contribution page
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Mr Hengjie Ma (SNS, Oak Ridge National Laboratory)12/10/2005, 12:30invitedA single high-density FPGA XC2V1500 plus 14-bit ADCs/DAC and 128Mb SRAM forms the digital hardware platform of SNS low-level RF control system. The carefully designed HDL implementation has limited controller latency under 150 ns (6 clock cycles) which allows the possibility for obtaining a rapid real-time feedback control. Given the typical 1 us external loop delay , a small...Go to contribution page