Beam size and position measurement based on logarithm processing algorithm in HLS Ⅱ

Chao-Cai Cheng; Bao-Gen Sun; Yong-Liang Yang; Ze-Ran Zhou; Ping Lu; Fang-Fang Wu; Ji-Gang Wang; Kai Tang; Qing Luo; Hao Li; Jia-Jun Zheng; Qing-Ming Duan

doi:10.1088/1674-1137/40/4/047004

Chinese Physics C> 2016, Vol. 40> Issue(4) : 047004 DOI: 10.1088/1674-1137/40/4/047004

Beam size and position measurement based on logarithm processing algorithm in HLS Ⅱ

1.
National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China

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Abstract：
A logarithm processing algorithm to measure beam transverse size and position is proposed and preliminary experimental results in Hefei Light Source Ⅱ(HLS Ⅱ) are given. The algorithm is based on only 4 successive channels of 16 anode channels of multianode photomultiplier tube(MAPMT) R5900U-00-L16, which has typical rise time of 0.6 ns and effective area of 0.8×16 mm for a single anode channel. In the paper, we first elaborate the simulation results of the algorithm with and without channel inconsistency. Then we calibrate the channel inconsistency and verify the algorithm using a general current signal processor Libera Photon in a low-speed scheme. Finally we get turn-by-turn beam size and position and calculate the vertical tune in a high-speed scheme. The experimental results show that measured values fit well with simulation results after channel differences are calibrated, and the fractional part of the tune in vertical direction is 0.3628, which is very close to the nominal value 0.3621.
- logarithm processing algorithm ,
- beam size and position ,
- multianode photomultiplier tube ,
- channel inconsistency

References

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Chao-Cai Cheng, Bao-Gen Sun, Yong-Liang Yang, Ze-Ran Zhou, Ping Lu, Fang-Fang Wu, Ji-Gang Wang, Kai Tang, Qing Luo, Hao Li, Jia-Jun Zheng and Qing-Ming Duan. Beam size and position measurement based on logarithm processing algorithm in HLS Ⅱ[J]. Chinese Physics C, 2016, 40(4): 047004. doi: 10.1088/1674-1137/40/4/047004

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Received: 2015-08-04
Revised: 2015-11-26

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Supported by National Natural Science Foundation of China(11005105, 11175173)

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沈阳化工大学材料科学与工程学院沈阳 110142

Beam size and position measurement based on logarithm processing algorithm in HLS Ⅱ

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Beam size and position measurement based on logarithm processing algorithm in HLS Ⅱ

Corresponding author: Chao-Cai Cheng,

Corresponding author: Bao-Gen Sun,

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