Application of turn-by-turn measurement system to commissioning of Hefei Light Source digital feedback system

meng ming; wang junhua; yang yongliang; zhou zeran; chen yuanbo

Volume 23 Issue 04

Apr. 2011

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Article Navigation > High Power Laser and Particle Beams > 2011 > 23(04): 0-

meng ming, wang junhua, yang yongliang, et al. Application of turn-by-turn measurement system to commissioning of Hefei Light Source digital feedback system[J]. High Power Laser and Particle Beams, 2011, 23.

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meng ming, wang junhua, yang yongliang, et al. Application of turn-by-turn measurement system to commissioning of Hefei Light Source digital feedback system[J]. High Power Laser and Particle Beams, 2011, 23.

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Application of turn-by-turn measurement system to commissioning of Hefei Light Source digital feedback system

1.
School of Nuclear Science and Technology,University of Science and Technology of China,Hefei 230029,China

Publish Date: 2011-04-14

Abstract

Abstract

The digital transverse feedback system is used to suppress the transverse beam instabilities at Hefei Light Source (HLS). During the commissioning of the feedback system, a turn-by-turn measurement system has been adopted to gather beam position information for the assessment of its feedback efficiency. The growth and damping of beam instability were observed by gradually changing the chromaticity through varying the sextupole magnet current. Corresponding growth time and damping time of instability oscillation were calculated to be 0.258 ms and 1.172 ms, respectively. Beam characteristic parameters, such as tune and phase spaces, were measured and calculated. Moreover, the whole process of beam moving near and across the 5/9 resonant line was analyzed.
- turn-by-turn measurement,
- tune,
- growth time,
- damping time,
- phase space,
- digital feedback

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