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First Superconducting RF Cavity for HEPS-TF Developed

Mar 24, 2017     Email"> PrintText Size

An on-site test of the 166.6 MHz Superconducting RF Cavity, a core component of the High Energy Photo Source-Test Facility (HEPS-TF), was conducted at the Institute of High Energy Physics (IHEP) of the Chinese Academy of Sciences on March 15.

Experts from Tsinghua University, Peking University and IHEP were given a report by the project research group and witnessed the on-site test.

The 166.6 MHz superconducting RF cavity is the world's first low-frequency (<200 MHz), high current (> 200 mA), high power (> 150 kW), beta = 1 superconducting cavity.

The test results at temperatures of 4.2 K and 2 K showed that the cavity’s performance has reached a world-leading level, and are an important milestone for the HEPS-TF project.

Vertical tests at 166.6 MHz and beta = 1, at temperatures of 4.2 K and 2 K, showed that the cavity has reached the design goals and has a high Q0 value. At 4.2 K, the cavity pressure is 1.5 MV and Q0 is 2.4x109 (compared to the design values of 1.5 MV and Q0> 5*108@4.2K), the surface resistance at low field is 10 nΩ, and the surface residual resistance is only 2.3 nΩ.

The cavity was designed by the high-frequency group from the Accelerator Division and manufactured by the Beijing High Energy Racing New Technology Co., Ltd.

 Test results of the 166.6 MHz Superconducting RF Cavity (Image by IHEP) 

the 166.6 MHz Superconducting RF Cavity (Image by IHEP) 

The 166.6 MHz Superconducting RF Cavity (Image by IHEP) 

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(Editor: ZHANG Nannan)

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