Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2009, Vol. 20 ›› Issue (3): 129-132 doi: 10.13538/j.1001-8042/nst.20.129-132


Venturi tube application in high power test of the SRF module

MA Guangming1,2,3 LIU Jianfei1,3 HOU Hongtao1,2,3 MA Zhenyu1,2,3 FU Zechuan1,2,3 ZHANG Zhigang1,3 ZHAO Zhentang1,3,*   

  1. 1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China 2Graduate University of Chinese Academy of Sciences, Beijing 100049, China 3Shanghai Key Lab. of Cryogenics & Superconducting RF Technology, Shanghai 201800, China
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MA Guangming, LIU Jianfei, HOU Hongtao, MA Zhenyu. Venturi tube application in high power test of the SRF module.Nuclear Science and Techniques, 2009, 20(3): 129-132     doi: 10.13538/j.1001-8042/nst.20.129-132


In the superconducting RF module, the dissipation power of the niobium cavity is an important parameter. In the Superconducting radio frequency (SRF) module’s acceptance test at Shanghai Synchrotron Radiation Facility (SSRF), the Venturi tube is used to measure the quality factor of SRF cavity at 4.2 K. During the test, the venturi tube is be calibrated by increasing heat load with internal heater. In this paper, the horizontal test principle and venturi effect are briefly introduced. The authors find out a correct way to calibrate the venturi tubes, the calibration results are presented here. From the calibration results, one can deduce the static loss of each module, the source of static loss is also analyzed.

Key words: RF superconductivity, Venturi, Horizontal test, Static loss