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摘要:
介绍了一种新型传感器Turbo-ICT在BEPCII输运线电荷量测量上的应用。 该探测器的电荷测量系统具有强抗干扰能力和较高的信噪比，能满足各种运行模式，尤其是Top-Up模式时的测量需求。介绍了该系统的工作原理、设计思想和功能。目前，该系统已在BEPCII电子输运线上在线应用于电荷量测量和注入效率的计算，文中给出了实际测量结果以及该系统进一步优化的方案。
Abstract:A new kind of sensor Turbo-ICT has been applied to accurate bunch charge measurement in BEPCII transportation line. The system improves the resistance ability against external interference and has high signal-to-noise ratio. This paper introduces the principle, the design ideas and the function of the system. Up to now, Turbo-ICT has been used to operate online for electron bunch charge quantity measurements successfully. This paper also presents the experiment results of the sensor.
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Key words:
- bunch /
- charge measurement /
- Turbo-ICT /
- BEPCII
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Figure 8. Large current collide mode (a) and synchrotron top-up mode (b) injection measurement results
Table 1. Main parameters of BEPCII LINAC
repetition rate/Hz frequency/MHz bunch length/ps(2σ) energy/GeV 50* 2856 10 1.89−2.5 *It is adjustable, depending on the need of injection. 
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Table 2. Parameters of charge measurement system
Turbo-ICT flange Turbo-ICT length/mm BCM-RF scale/nC BCM-RF output/V DN100 40 0.05−2 +5
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Table 3. Main features of RedpiataySTEMlab 125-14
RF Input full scale voltage/V RF Input channels Sample rate/(MS/s) ADC resolution/bit Bandwidth ±20 2 125 14 DC−60 MHz
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[1] Zhang Chuang, Ma Li. Design and development of upgrade project of Beijing electron positron collide accelerator[M]. Shanghai: Shanghai Scientific & Technical Publishers, 2015: 4. [2] TURBO-ICT & BCM-RF-E[EB/OL]. https://www.bergoz.com/products/turbo-ict/ [3] Belohrad D, Krupa M, Søby L, et al. A new integrating current transformer for the LHC[C]//Proceedings of the 3rd International Beam Instrumentation Conference (IBIC’14). Monterey, CA, USA: SLAC National Accelerator Laboratory, 2014. [4] Stulle F, Bergoz J, Instrumentation B, et al. TURBO-ICT pico-coulomb calibration to percent-level accuracy[C]//Proceedings of the 37th International Free Electron Laser Conference (FEL’2015). Daejeon, Korea: Korea Atomic Energy Research Institute and Pohang Accelerator Laboratory, 2015: 118-121. [5] Choi H J, Chae M S, Kang H S, et al. Introduction to the test result of Turbo-ICT in PAL-ITF[C]//Proceedings of the 3rd International Beam Instrumentation Conference (IBIC’14). Monterey, CA, USA: SLAC National Accelerator Laboratory, 2014: 553-557. [6] Turbo-ICT and BCM-RF Manual[EB/OL].https://www.bergoz.com/products/turbo-ict/. [7] STEMlab 125-14[EB/OL].https://redpitaya.com/stemlab-125-14/ [8] What do I need before I start?[EB/OL]. https://redpitaya.readthedocs.io/en/latest/quickStart/needs.html [9] Lu Y H, He J. Virtual signal spectrum analyzer development based on Redpitaya and epics for tune measurement in BEPC-II[C]//Proceedings of the 7th International Beam Instrumentation Conference (IBIC’18). Shanghai, China: Shanghai Institute of Applied Physics, 2018: 159-161. [10] redpitaya-epics[EB/OL].https://github.com/AustralianSynchrotron/redpitaya-epics [11] AsynDrivermanual[EB/OL]. https://epics.anl.gov/modules/soft/asyn/ -
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