Optimization of the HIRFL-CSR Cluster Target

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CAI Xiao-Hong, SHAO Cao-Jie, LU Rong-Chun, LI Ming-Sheng, RUAN Fang-Fang and ZHAN Wen-Long. Optimization of the HIRFL-CSR Cluster Target[J]. Chinese Physics C, 2007, 31(8): 750-754.
CAI Xiao-Hong, SHAO Cao-Jie, LU Rong-Chun, LI Ming-Sheng, RUAN Fang-Fang and ZHAN Wen-Long. Optimization of the HIRFL-CSR Cluster Target[J]. Chinese Physics C, 2007, 31(8): 750-754. shu
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Received: 2006-11-05
Revised: 2006-12-20
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Optimization of the HIRFL-CSR Cluster Target

    Corresponding author: CAI Xiao-Hong,
  • Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China2 Budker Institute of Nuclear Physics, 630090 Novosibirsk, Russian Federation

Abstract: A new gas delivery system is designed and installed for HIRFL-CSR cluster target. The original blocked nozzle is replaced by a new one with the throat diameter of 0.12mm. New test of hydrogen and argon gases are performed. The stable jets can be obtained for these two operation gases. The attenuation of the jet caused by the collision with residual gas is studied. The maximum achievable H2 target density is 1.75×1013 atoms/cm3 with a target thickness of 6.3×1012 atoms/cm2 for HIRFL-CSR cluster target. The running stability of the cluster source is tested both for hydrogen and argon. The operation parameters for obtaining hydrogen jet are optimized. The results of long time running for H2 and Ar cluster jets look promising. The jet intensity has no essential change during the test for H2 and Ar.

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