Actions for EXCESS RF POWER REQUIRED FOR RF CONTROL OF THE SPALLATION NEUTRON SORUCE (SNS) LINAC, A PULSED HIGH-INTENSITY SUPERCONDUCTING PROTON ACCELERATOR [electronic resource].

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EXCESS RF POWER REQUIRED FOR RF CONTROL OF THE SPALLATION NEUTRON SORUCE (SNS) LINAC, A PULSED HIGH-INTENSITY SUPERCONDUCTING PROTON ACCELERATOR [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2001.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
4 pages : digital, PDF file
Additional Creators
Los Alamos National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
A high-intensity proton linac, such as that being planned for the SNS, requires accurate RF control of cavity fields for the entire pulse in order to avoid beam spill. The current design requirement for the SNS is RF field stability within ±0.5% and ±0.5 . This RF control capability is achieved by the control electronics using the excess RF power to correct disturbances. To minimize the initial capital costs, the RF system is designed with 'just enough' RF power. All the usual disturbances exist, such as beam noise, klystron/HVPS noise, coupler imperfections, transport losses, turn-on and turn-off transients, etc. As a superconducting linac, there are added disturbances of large magnitude, including Lorentz detuning and microphonics. The effects of these disturbances and the power required to correct them are estimated, and the result shows that the highest power systems in the SNS have just enough margin, with little or no excess margin.
Report Numbers
E 1.99:la-ur-01-3046
la-ur-01-3046
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Note
Published through SciTech Connect.
01/01/2001.
"la-ur-01-3046"
Submitted to: PAC 2001, Chicago, IL, June 18-22, 2001.
Lynch, M. T.; Wang, Y. M.; Kwon, S. I.; Regan, A. H.
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