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Power Test of the Ladder IH-RFQ Accelerator at Peking University |
| LU Yuan-Rong, CHEN Wei, NIE Yuan-Cun**, LIU Ge, GAO Shu-Li, ZENG Hong-Jin, YAN Xue-Qing, CHEN Jia-Er
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State Key Lab of Nuclear Physics and Technology, Peking University, Beijing 100871
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| Cite this article: |
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LU Yuan-Rong, CHEN Wei, NIE Yuan-Cun et al 2011 Chin. Phys. Lett. 28 072901 |
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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.
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| Keywords:
29.20.Ej
29.27.Bd
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Received: 19 February 2011
Published: 29 June 2011
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| PACS: |
29.20.Ej
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(Linear accelerators)
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29.27.Bd
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(Beam dynamics; collective effects and instabilities)
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