Using a full-sine septum power supply to study the top-up orbit disturbance at Taiwan light source

Chang, H. P.; Fann, Cathy S.J.; Chen, H. H.; Huang, Szu-Jung; Huang, Chih-Hsien; Chiu, Pei-Chen; Hu, Kuo Hwa; Chen, C. L.; Tsai, Kuang-Lung; Lin, K.K.; Hsu, K.T.

doi:10.1109/ppc.2017.8291215

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“…Its circumference is 120 m, with a harmonic number of 200 [2]. Four kickers are used in the injection scheme, making the beam perturbation unavoidable during injection [3,4]. In a previous study [3], turn-by-turn (TByT) data were used to analyze the injection transient.…”

Section: Introductionmentioning

confidence: 99%

Bunch-by-bunch transverse position measurement during injection

Huang,

Hsu,

Liao

et al. 2024

J. Phys.: Conf. Ser.

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Bunch-by-bunch systems have been developed at the Taiwan Light Source and the Taiwan Photon Source to monitor transverse position and filling patterns. The system comprises four channels with a 500 MHz sampling rate synchronized with the accelerator’s radio frequency. It is utilized to diagnose injection transients due to kick mismatch, beam oscillations resulting from damped betatron oscillations and wakefield, and monitor the injection current of each bunch.

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Section: Introductionmentioning

confidence: 99%

Bunch-by-bunch transverse position measurement during injection

Huang,

Hsu,

Liao

et al. 2024

J. Phys.: Conf. Ser.

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Beam motion and photon flux dips during injection at the Taiwan Photon Source

Huang

Hsu

Chen

et al. 2019

J. Phys.: Conf. Ser.

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The Taiwan photon source (TPS) is a 3 GeV synchrotron light source now in routine operation at the NSRRC. At the beginning of beam commissioning, significant photon flux dips could be observed at injection due to a blow-up of the beam size. To eliminate this transient effect, all four kickers were rematched. The leakage field was shielded and the induced current loops at vacuum chambers in the injection area were also eliminated. These efforts reduced the horizontal betatron oscillations and orbit distortions to around one-tenth. In order to decrease the recovery time of photon dips during injection, the operational chromaticity was reduced to improve incoherent effects. After all those improvements, the photon flux dips during injection dropped to 30 % and the recovery time to less than 1 msec.

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Using a full-sine septum power supply to study the top-up orbit disturbance at Taiwan light source

Cited by 2 publications

References 3 publications

Bunch-by-bunch transverse position measurement during injection

Bunch-by-bunch transverse position measurement during injection

Beam motion and photon flux dips during injection at the Taiwan Photon Source

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