摘要A 104-MHz ladder interdigital-H radio frequency quadrupole accelerator (T-IH-RFQ) is developed for applying RFQs to heavy ion implantation and accelerator-based mass spectroscopy in recent years at the Institute of Heavy Ion Physics, Peking University. It could accelerate ions with a mass-to-charge ratio of less than 14, from 2.9 keV/u to 35.7 keV/u within a length of 1.1 m. The T-IH-RFQ cavity operating at H21(0) mode was constructed successfully. Based on a well designed rf power feeding system, the cavity was cold measured and tested with high rf power. In the case of cold measurement, the rf properties were obtained using a vector network analyzer with the help of a perturbation capacitor. During a high power test, the inter−electrode voltage was derived from the energy spectrum of x-rays measured by a high purity Ge detector. The results show that the specific shunt impedance of the T-IH-RFQ cavity reaches 178 kΩm, which could meet the requirements of beam dynamics design.
Abstract：A 104-MHz ladder interdigital-H radio frequency quadrupole accelerator (T-IH-RFQ) is developed for applying RFQs to heavy ion implantation and accelerator-based mass spectroscopy in recent years at the Institute of Heavy Ion Physics, Peking University. It could accelerate ions with a mass-to-charge ratio of less than 14, from 2.9 keV/u to 35.7 keV/u within a length of 1.1 m. The T-IH-RFQ cavity operating at H21(0) mode was constructed successfully. Based on a well designed rf power feeding system, the cavity was cold measured and tested with high rf power. In the case of cold measurement, the rf properties were obtained using a vector network analyzer with the help of a perturbation capacitor. During a high power test, the inter−electrode voltage was derived from the energy spectrum of x-rays measured by a high purity Ge detector. The results show that the specific shunt impedance of the T-IH-RFQ cavity reaches 178 kΩm, which could meet the requirements of beam dynamics design.
(Beam dynamics; collective effects and instabilities)
引用本文:
LU Yuan-Rong;CHEN Wei;NIE Yuan-Cun**;LIU Ge;GAO Shu-Li;ZENG Hong-Jin;YAN Xue-Qing;CHEN Jia-Er
. Power Test of the Ladder IH-RFQ Accelerator at Peking University[J]. 中国物理快报, 2011, 28(7): 72901-072901.
LU Yuan-Rong, CHEN Wei, NIE Yuan-Cun**, LIU Ge, GAO Shu-Li, ZENG Hong-Jin, YAN Xue-Qing, CHEN Jia-Er
. Power Test of the Ladder IH-RFQ Accelerator at Peking University. Chin. Phys. Lett., 2011, 28(7): 72901-072901.
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2011, Vol. 28 
