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Physics > Accelerator Physics

arXiv:1507.08515 (physics)
[Submitted on 30 Jul 2015 (v1), last revised 3 Aug 2015 (this version, v3)]

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

Authors:Chaocai Cheng, Baogen Sun, Yongliang Yang, Zeran Zhou, Ping Lu, Fangfang Wu, Jigang Wang, Kai Tang, Qing Luo, Hao Li, Jiajun Zheng, Qingming Duan
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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 0.8x16 mm for a single anode channel. In the paper, we firstly elaborate the simulation results of the algorithm with and without channel inconsistency. Then we calibrate the channel inconsistency and verify the algorithm using general current signal processor Libera Photon in low-speed scheme. Finally we get turn-by-turn beam size and position and calculate the vertical tune in 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.
Comments: 6 pages, 11 figures, 7 equations
Subjects: Accelerator Physics (physics.acc-ph); High Energy Physics - Experiment (hep-ex)
Cite as: arXiv:1507.08515 [physics.acc-ph]
  (or arXiv:1507.08515v3 [physics.acc-ph] for this version)
  https://doi.org/10.48550/arXiv.1507.08515
Journal reference: Chinese Physics C, 2016, 40(4): 047004
Related DOI: https://doi.org/10.1088/1674-1137/40/4/047004

Submission history

From: Chaocai Cheng [view email]
[v1] Thu, 30 Jul 2015 14:27:39 UTC (6,004 KB)
[v2] Fri, 31 Jul 2015 00:31:57 UTC (6,004 KB)
[v3] Mon, 3 Aug 2015 04:45:35 UTC (6,004 KB)
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