Beam transmission efficiency of the HIRFL-SSC

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YE Feng and YANG Shang-Yun. Beam transmission efficiency of the HIRFL-SSC[J]. Chinese Physics C, 2013, 37(3): 037001. doi: 10.1088/1674-1137/37/3/037001
YE Feng and YANG Shang-Yun. Beam transmission efficiency of the HIRFL-SSC[J]. Chinese Physics C, 2013, 37(3): 037001.  doi: 10.1088/1674-1137/37/3/037001 shu
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Received: 2011-10-10
Revised: 1900-01-01
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Beam transmission efficiency of the HIRFL-SSC

    Corresponding author: YE Feng,

Abstract: In this paper we address the problem of the low beam transmission efficiency of the HIRFL-SSC. The influence of the SFC-SSC energy match, the SSC RF voltage, and harmonic field in the injection area of the SSC, and the SSC central trajectory on the beam transmission efficiency have been analyzed both from the theoretical side and from the actual operating data. The main reason is that the soft-edge approximation of the magnet field (the so-called theoretical field) and the simplified calculation programs were adopted when calculating the beam center trajectory and designing the injection and extraction system, and the measured magnetic field was not used to correct the calculation results. These led to large deviations of the calculated center trajectory, and then resulted in low efficiency of the SSC beam transmission. Therefore, the re-calculation of SSC beam center trajectory and injection and extraction system, as well as the measured magnet field correction are the key points required to solve the problem.

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