LEDA的大功率运行
High Power Operations of LEDA
摘要:
LEDA的质子束加速器,一个350 MHz的连续波(CW)射频四极杆,成功地将100 mA的CW质子束从75 keV加速到6.7 MeV。我们已经积累了111小时的电子束上的时间与至少90毫安的连续波输出束流。8米长的加速器对来自LEDA注入器的直流、75 keV、106 mA的H+束进行了加速,其透过率为94%。当在设计的射频功率水平下运行时,叶片尖端的峰值电场为33 MV/m。然而,为了保持上述CW波束的高传输率,有必要在比设计高10%的场水平下操作该放大器。当使用该场操作时,该换能器消耗1.5 MW的RF功率。三个速调管提供了2.2兆瓦的射频功率所需的加速器,以加速100毫安的电子束。光束功率为670 kW。在加速100毫安CW质子束到6.7兆电子伏,遇到的一些挑战,将进行讨论。
英文摘要:
The LEDA RFQ, a 350-MHz continuous wave (CW) radio-frequency quadrupole (RFQ), successfully accelerated a 100-mA CW proton beam from 75 keV to 6.7 MeV. We have accumulated 111 hr of beam on time with at least 90 mA of CW output beam current. The 8-m-long RFQ accelerates a dc, 75-keV, ~106-mA H+ beam from the LEDA injector with ~94% transmission. When operating the RFQ at the RF power level for which it was designed, the peak electrical field on the vane tips is 33 MV/m. However, to maintain the high transmission quoted above with the CW beam, it was necessary to operate the RFQ with field levels ~10% higher than design. The RFQ dissipates 1.5 MW of RF power when operating with this field. Three klystrons provide the 2.2 MW of RF power required by the RFQ to accelerate the 100-mA beam. The beam power is 670 kW. Some of the challenges that were met in accelerating a 100-mA CW proton beam to 6.7 MeV, will be discussed.
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