Conveners
Opening Session
- Trevor Linnecar (CERN)
Opening Session
- Trevor Linnecar (CERN)
Description
The Scientific Secretary of this session is Dr. Thomas Bohl
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Dr Trevor Linnecar (CERN)10/10/2005, 08:45invited
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Dr Steve Myers (CERN)10/10/2005, 08:50invitedIntroduction talkGo to contribution page
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Mr Curt Hovater (Jefferson Lab)10/10/2005, 09:00invitedThe first LLRF workshop was held at Jefferson Lab in April 2001. Since then, many of the questions posed at that workshop have been answered while new issues have arisen. Two topics that resonated at that the first workshop were issues of Analog vs. Digital, and Self Excited Loop (SEL) control vs. Generator Driven Resonator (GDR) control. A number of talks were given on both subjects,...Go to contribution page
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Prof. Kazunori Akai (KEK)10/10/2005, 09:30invitedThe KEK B-Factory (KEKB) is a high-luminosity asymmetric energy electron-positron collider to support physics research programs on CP-violation and other topics in B- meson decays. The RF system for KEKB was designed to cope with difficulties arising from high current stored beam. It has two types of innovative heavily damped cavities for stabilizing coupled-bunch instabilities due to...Go to contribution page
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Dr Makoto Tobiyama (KEK Accelerator Laboratory)10/10/2005, 10:30invitedTransverse bunch-by-bunch feedback systems for curing coupled-bunch instabilities have been working well since the early stages of the commissioning of the rings. To meet requirments of 90 degrees of phase shift, suppression of the static component and adjustable digital delay, a high-speed digital filter system with two-tap FIR functionality has been developed. Beam diagnostic systems...Go to contribution page
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Dr Flemming Pedersen (CERN)10/10/2005, 10:50invited
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Mr Dan Van Winkle (SLAC)10/10/2005, 11:20invitedThe PEP-II Low Level RF systems incorporate multiple feed back loops to control the cavity impedance as well as maintain the operating point regulation. The system incorporates several recording and playback buffers which can be used to both setup and monitor the operating point of the system. In addition, the recording buffers aid in the diagnostics of hardware failures within the...Go to contribution page
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Dr John Fox (Stanford Linear Accelerator Center)10/10/2005, 11:40invitedThe RF systems in PEP-II use direct and comb loop feedback techniques to minimize the cavity fundamental impedance driving low-mode coupled bunch instabilities. The effectiveness of these techniques are strongly dependent on the linearity and dynamic behavior of the klystron amplifier in the feedback path. This short talk will summarize the impedance control techniques in PEP-II, and...Go to contribution page
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Mark Champion (Oak Ridge National Laboratory / Spallation Neutron Source)10/10/2005, 12:00invitedThe Spallation Neutron Source (SNS) project, which is scheduled for completion in Spring 2006, will utilize 100 RF systems for acceleration and bunching of the H- beam. Ninety-six of these systems drive the Linac, which was successfully commissioned with beam in Aug-Sep 2005. The remaining four RF systems are presently being tested in preparation for the Ring commissioning run,...Go to contribution page
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Mr Kevin S. Smith (BNL)10/10/2005, 12:30invitedThe RF group within the BNL Collider-Accelerator Department (BNL C-AD) supports the development, operations and maintenance of RF systems for three operational synchrotrons (AGS Booster, AGS and RHIC), and is also responsible for RF system development for a number of upgrades and projects both planned or in progress. Active projects include the C-AD LLRF Upgrade (upgrade of AGS...Go to contribution page