Simulation and analysis of the transverse spectrum in HIRFL-CSR

LI Peng; YUAN You-Jin; MAO Li-Jun; YANG Jian-Cheng; LI Guo-Hong; YIN Da-Yu; LI Jie; LI Xiao-Ni; CHAI Wei-Ping; SHI Jian

doi:10.1088/1674-1137/35/2/015

Chinese Physics C> 2011, Vol. 35> Issue(2) : 183-187 DOI: 10.1088/1674-1137/35/2/015

Simulation and analysis of the transverse spectrum in HIRFL-CSR

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Abstract：
Particles in a storage ring oscillate in the longitudinal and transverse dimensions. Therefore, the signal that beam has generated can be analyzed in the frequency domain to extract many beam parameters, such as tune, momentum spread, emittance and their evolution with time and so on. In this paper, the transverse spectrum in HIRFL-CSR was simulated and analyzed under different conditions, including electron cooling, hollow electron beam, solenoid effect, the tune shift caused by power supply ripple and the misalignment between ion and electron beams. The result of the simulation shows that the longitudinal magnetic field of the electron cooling device should be compensated by a “compensation solenoid”, and the power supply ripple must be controlled, otherwise the accumulation would be affected and the beam would be lost.

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LI Peng, YUAN You-Jin, MAO Li-Jun, YANG Jian-Cheng, LI Guo-Hong, YIN Da-Yu, LI Jie, LI Xiao-Ni, CHAI Wei-Ping and SHI Jian. Simulation and analysis of the transverse spectrum in HIRFL-CSR[J]. Chinese Physics C, 2011, 35(2): 183-187. doi: 10.1088/1674-1137/35/2/015

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Received: 2009-04-29
Revised: 2010-06-02

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沈阳化工大学材料科学与工程学院沈阳 110142

Simulation and analysis of the transverse spectrum in HIRFL-CSR

Received Date: 2009-04-29
Accepted Date: 2010-06-02
Available Online: 2011-02-05

Abstract: Particles in a storage ring oscillate in the longitudinal and transverse dimensions. Therefore, the signal that beam has generated can be analyzed in the frequency domain to extract many beam parameters, such as tune, momentum spread, emittance and their evolution with time and so on. In this paper, the transverse spectrum in HIRFL-CSR was simulated and analyzed under different conditions, including electron cooling, hollow electron beam, solenoid effect, the tune shift caused by power supply ripple and the misalignment between ion and electron beams. The result of the simulation shows that the longitudinal magnetic field of the electron cooling device should be compensated by a “compensation solenoid”, and the power supply ripple must be controlled, otherwise the accumulation would be affected and the beam would be lost.