WEAP076 (Poster)

Presenter: Christine Treml (Los Alamos National Laboratory)
email: treml@lanl.gov
Review Status: Proceedings Ready - 02/11/02
FullText: pdf
Eprint: physics/0111083

Resonance Control Cooling System for a Proto-type Coupled Cavity Linac*

C.A. Treml, S.K. Brown, J.D. Bernardin

Los Alamos National Laboratory LANL will be supplying a coupled cavity linac CCL to the Spallation Neutron Source SNS at Oak Ridge National Laboratory ORNL. The CCL cavities have been designed and will be manufactured and pre-tuned to have a resonant frequency of 805.140 MHz with 20C coolant flowing through the structure surrounding the RF cavity and no RF heating.[1] For a CCL, electromagnetic field resonant frequency is primarily a function of the geometry of the cavities, side coupling cells, and bridge couplers. So as RF power is introduced into the cavity, the copper cavity will heat up, thus expand, and it^Rs resonant frequency will decrease. A resonance control cooling system RCCS has been designed to control this expansion, thus the resonant frequency of the CCL. A proto-type, Hot Model, consisting of two segments of the overall CCL has been manufactured and installed at LANL.[2] An RF source will be applied to the Hot Model to determine the success of the cavity design, the effectiveness of the control algorithms and cooling systems, and the validity of the RCCS model used during the Hot Model design. From a system controls perspective, an overview of the hot model, a description of the RCCS, and the pertinent data from the RF tests will be presented.
[1]J.D. Bernardin, et al., 'Spallation Neutron Source Coupled Cavity Linac Water Cooling and Resonance Control System Preliminary Design Report,' SNS-104040500-DA0001-R00, August 2, 2000
[2] D. Hayden and C. Martin, 'Instrumentation and Controls System for the SNS Hot Model RCCS 1999 Final Report,' Energy and Process Engineering, Nov. 1999
{*} Work supported by the Office of Basic Science, Office of Science of the US Department of Energy, and by Oak Ridge National Laboratory
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