TESLA RF POWER COUPLERS DEVELOPMENT AT DESY.
TESLA RF POWER COUPLERS DEVELOPMENT AT DESY.
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发表时间：
2001
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通讯作者：
B. Dwersteg;D. Kostin;M. Lalayan;C. Martens;W. Moeller
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作者：
B. Dwersteg;D. Kostin;M. Lalayan;C. Martens;W. Moeller
TESLA测试设施（TTF）[1]的不同RF功率耦合器正在DESY开发和运行。TTF功率耦合器II型，目前主要与“FNAL”耦合器一起使用[2]，最近通过耦合器TTF III的设计进行了改进[3]。射频功率耦合器通常在全射频功率下进行测试，首先在测试台上测试两个耦合器，然后在水平测试低温恒温器中测试每个耦合器及其超导腔。耦合器的测试结果表明，在1.3 ms的全脉冲长度和RF功率甚至高达约1 MW时稳定运行而没有故障。在约25 MV/m下腔操作所需的平均功率为230 kW。正在研究改善RF性能和缩短处理时间的新程序，如内表面的TiN涂层。此外，下一个耦合器设计TTF IV和V正在开发中。
Different RF power couplers for the TESLA Test Facility (TTF) [1] are under development and operation at DESY. TTF power couplers type II which are mainly used up till now together with "FNAL" couplers [2] recently have been improved by design of coupler TTF III [3]. RF power couplers are tested normally with full RF power, at first two couplers on a test stand and afterwards each coupler together with its superconducting cavity in a horizontal test cryostat. Results of coupler tests showed stable operation at full pulse length of 1.3 ms and RF power even up to about 1 MW without breakdowns. The average power needed for cavity operation at about 25 MV/m is 230 kW. New procedures to improve RF performance and to shorten processing time, like TiN coating of the inner surfaces, are being investigated. Also, the next coupler designs TTF IV and V are being developed.