Bunch-by-bunch beam size measurement during injection at Shanghai Synchrotron Radiation Facility

Chen, Han-Jiao; Chen, Jie; Gao, Bo; Leng, Yongbin

doi:10.1007/s41365-018-0420-2

Cited by 15 publications

(6 citation statements)

References 12 publications

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“…While for the Oscilloscope-based approach, its system can be built quickly, and the BbB profile can be extracted by specific algorithms. However, the past extraction algorithm for BbB profile can hardly work timely due to the time cost of the Gaussian fitting process [7]. To accelerate the extraction process, one in-situ extraction algorithm for monitoring BbB profile in the storage ring was developed.…”

Section: Figure 1 the Layout Of Typical Synchrotron Radiation Light S...mentioning

confidence: 99%

Data synchronization module for multi-dimensional bunch-by-bunch measurement in a storage ring

Zhao

Jin

et al. 2022

Review of Scientific Instruments

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Multi-dimensional bunch-by-bunch (BbB) measurements are an efficient tool to research beam dynamics induced by wakefields in storage ring light sources, yet they can have data misplacement problems on high-speed acquisition boards. Hence, a data synchronization module (DSM) was designed to solve the issue of data misplacement. We analyzed different synchronization states in the DSM and conducted testing of the DSM on a field programmable gate array to evaluate its performance. Test results indicate the synchronized DSM data from multiple high-speed acquisition boards corresponds to the bucket number in the bunch filling pattern. We found that the resolution of the longitudinal phase in three-dimensional BbB measurements can be improved with DSM and propose a scheme for multi-dimensional BbB measurements. In this paper, we will detail the structure of DSM and its limitations.

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Section: Figure 1 the Layout Of Typical Synchrotron Radiation Light S...mentioning

confidence: 99%

Data synchronization module for multi-dimensional bunch-by-bunch measurement in a storage ring

Zhao

Jin

et al. 2022

Review of Scientific Instruments

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“…When the pre-kicker is triggered, the expected beam centroid motion is not measured, and the machine protection system can be notified to prevent extraction. In addition, recent developments in bunch-by-bunch beam size measurement systems [16] could provide more direct verification of the influence of the pre-kicker system on the bunch size. This aspect of the beam instrumentation and machine protection systems requires a more refined study.…”

Section: Working Principle Of a Pre-kicker Systemmentioning

confidence: 99%

Using a pre-kicker to ensure safe extractions from the HEPS storage ring

et al. 2021

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The High Energy Photon Source (HEPS) is a 6 GeV diffraction-limited storage ring light source under construction. The swap-out injection is adopted with the depleted bunch recycled via high-energy accumulation in the booster. The extremely high beam energy density of the bunches with an ultra-low emittance (about 30 pm horizontally and 3 pm vertically) and high bunch charges (from 1.33 to 14.4 nC) extracted from the storage ring could cause hazardous damage to the extraction Lambertson magnet in case of extraction kicker failure. To this end, we proposed the use of a pre-kicker to spoil the bunches prior to extraction, significantly reducing the maximum beam energy density down to within a safe region while still maintaining highly efficient extractions. The main parameters of the pre-kicker are simulated and discussed.

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“…By measuring the transverse size of the bunched beam, we can obtain the transverse damping time, the transverse quadrupole oscillation frequency and other machine parameters. Furthermore, by analyzing the change of the transverse beam size during injection, the injection efficiency can be optimized and simultaneously the mechanism of the transverse beam instability under high current intensity also can be explored [2] . Therefore, in order to further improve the performance and operation stability of the machine, it is necessary to develop a bunch-by-bunch transverse beam size measurement system for the investigation of beam instability, analysis of beam dynamics, and optimization of beam injection process.…”

Section: Introductionmentioning

confidence: 99%

Preliminary design of bunch-by-bunch transverse beam size system at the HLS-II storage ring

Liu

Zhao

Sun

et al. 2023

Ninth Symposium on Novel Photoelectronic Detection Technology and Applications

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Bunch-by-bunch beam size measurement during injection at Shanghai Synchrotron Radiation Facility

Cited by 15 publications

References 12 publications

Data synchronization module for multi-dimensional bunch-by-bunch measurement in a storage ring

Data synchronization module for multi-dimensional bunch-by-bunch measurement in a storage ring

Using a pre-kicker to ensure safe extractions from the HEPS storage ring

Preliminary design of bunch-by-bunch transverse beam size system at the HLS-II storage ring

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