Multi-port cavity model and low-level RF systems design for VHF gun

Liu, Kui; Li, Lin; Wang, Cheng; Gu, Qiang; Zhao, Minghui

doi:10.1007/s41365-019-0711-2

Cited by 5 publications

(1 citation statement)

References 12 publications

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“…The simplified schematic layout of the SHINE injector, consisting of a VHF gun [23,24] operating at 162.5 MHz, three solenoids, a 1.3-GHz 2-cell normal-conducting RF buncher for electron bunch compression, a 1.3-GHz SRF single-cavity cryomodule (injCM01) and a TESLA 1.3-GHz SRF 8-cavities cryomodule (injCM02), is shown in figure 1. The electron bunch are generated by the driving laser in the VHF Gun, which energy is 0.75 MeV at the exit of the gun.…”

Section: The Layout Of Shine Injector and Geometry Of Tesla Cavitymentioning

confidence: 99%

Coupler RF kick and emittance optimization of the SHINE injector

Guo,

Gu,

Jiang

et al. 2024

J. Inst.

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Coupler RF kick due to the asymmetric structure caused by the coupler, is more likely to lead to emittance growth in the SHINE injector with low beam energy. The calculation of coupler RF kick and resulting emittance dilution has been studied in detail in the literature. In this paper, a novel approach is provided that a lossy material is placed on the surface of the superconducting cavity to approximate the Q 0 of the TESLA cavity, and a frequency solver of CST is used to simulate the electromagnetic field distribution, which is used to calculate coupler RF kick, and calibrated against the results of CST Particle Tracking Studio with a good agreement. In order to minimize the emittance growth of SHINE injector, a 1.3 GHz symmetric twin-coupler cavity is adoped in the single-cavity cryomodule, and the rotational angle and permutation of the 8 cavities in the 8-cavities cryomodule is optimized. Ultimately, the optimized emittance is lower than the design parameter.

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Section: The Layout Of Shine Injector and Geometry Of Tesla Cavitymentioning

confidence: 99%