High-intensity multi-bunch beam generation by a photo-cathode RF gun

Koichiro Hirano; Masafumi Fukuda; Mikio Takano; Yoshio Yamazaki; Toshiya Muto; Sakae Araki; Nobuhiro Terunuma; Masao Kuriki; Mitsuo Akemoto; Hitoshi Hayano; Junji Urakawa

doi:10.1016/j.nima.2006.01.106

High-intensity multi-bunch beam generation by a photo-cathode RF gun

Koichiro Hirano, Masafumi Fukuda, Mikio Takano, Yoshio Yamazaki, Toshiya Muto, Sakae Araki, Nobuhiro Terunuma, Masao Kuriki, Mitsuo Akemoto, Hitoshi Hayano, Junji Urakawa

Research Center for Electron Photon Science (ELPH)

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

Abstract

A multi-bunch photo-cathode RF gun system has been developed as an electron source for the production of intense quasi-monochromatic X-rays based on inverse Compton scattering. The desired multi-bunch beam is 100 bunches/pulse with a total charge of 500 nC and a bunch spacing of 2.8 ns. We modified the gun cavity of a 'BNL-type IV' RF gun to allow a CsTe cathode plug in the end plate. The system uses a four-dipole chicane beam line to allow the injection of laser light normal to the cathode surface. We compensate the gun cavity beam loading caused by the high-intensity multi-bunch electron beam by injecting the laser pulse before RF power has filled the cavity. We have achieved a total intensity of 220 nC in 100 bunches with a bunch-to-bunch energy spread under 1.3% (peak-to-peak). This paper concentrates on experiments to generate the high-intensity multi-bunch beam with compensation of the bunch-to-bunch energy spread due to heavy beam loading.

Original language	English
Pages (from-to)	233-239
Number of pages	7
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	560
Issue number	2
DOIs	https://doi.org/10.1016/j.nima.2006.01.106
Publication status	Published - 2006 May 10

Keywords

Beam loading
Multi-bunch
Photo-cathode
RF gun

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10.1016/j.nima.2006.01.106

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Hirano, K., Fukuda, M., Takano, M., Yamazaki, Y., Muto, T., Araki, S., Terunuma, N., Kuriki, M., Akemoto, M., Hayano, H., & Urakawa, J. (2006). High-intensity multi-bunch beam generation by a photo-cathode RF gun. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 560(2), 233-239. https://doi.org/10.1016/j.nima.2006.01.106

@article{7bc7c219138a4d829f42f9b61c34bc58,

title = "High-intensity multi-bunch beam generation by a photo-cathode RF gun",

abstract = "A multi-bunch photo-cathode RF gun system has been developed as an electron source for the production of intense quasi-monochromatic X-rays based on inverse Compton scattering. The desired multi-bunch beam is 100 bunches/pulse with a total charge of 500 nC and a bunch spacing of 2.8 ns. We modified the gun cavity of a 'BNL-type IV' RF gun to allow a CsTe cathode plug in the end plate. The system uses a four-dipole chicane beam line to allow the injection of laser light normal to the cathode surface. We compensate the gun cavity beam loading caused by the high-intensity multi-bunch electron beam by injecting the laser pulse before RF power has filled the cavity. We have achieved a total intensity of 220 nC in 100 bunches with a bunch-to-bunch energy spread under 1.3% (peak-to-peak). This paper concentrates on experiments to generate the high-intensity multi-bunch beam with compensation of the bunch-to-bunch energy spread due to heavy beam loading.",

keywords = "Beam loading, Multi-bunch, Photo-cathode, RF gun",

author = "Koichiro Hirano and Masafumi Fukuda and Mikio Takano and Yoshio Yamazaki and Toshiya Muto and Sakae Araki and Nobuhiro Terunuma and Masao Kuriki and Mitsuo Akemoto and Hitoshi Hayano and Junji Urakawa",

note = "Funding Information: We would like to express our gratitude to all members of the KEK-ATF group and the KEK-Injector group for their helpful support. We would like to thank Marc Ross and Janice Nelson for useful comments and good suggestions. This research was supported by the budget for the Advanced Compact Accelerator Project of National Institute of Radiological Sciences.",

year = "2006",

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doi = "10.1016/j.nima.2006.01.106",

language = "English",

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pages = "233--239",

journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",

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Hirano, K, Fukuda, M, Takano, M, Yamazaki, Y, Muto, T, Araki, S, Terunuma, N, Kuriki, M, Akemoto, M, Hayano, H & Urakawa, J 2006, 'High-intensity multi-bunch beam generation by a photo-cathode RF gun', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 560, no. 2, pp. 233-239. https://doi.org/10.1016/j.nima.2006.01.106

High-intensity multi-bunch beam generation by a photo-cathode RF gun. / Hirano, Koichiro; Fukuda, Masafumi; Takano, Mikio et al.
In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 560, No. 2, 10.05.2006, p. 233-239.

Research output: Contribution to journal › Article › peer-review

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T1 - High-intensity multi-bunch beam generation by a photo-cathode RF gun

AU - Hirano, Koichiro

AU - Fukuda, Masafumi

AU - Takano, Mikio

AU - Yamazaki, Yoshio

AU - Muto, Toshiya

AU - Araki, Sakae

AU - Terunuma, Nobuhiro

AU - Kuriki, Masao

AU - Akemoto, Mitsuo

AU - Hayano, Hitoshi

AU - Urakawa, Junji

N1 - Funding Information: We would like to express our gratitude to all members of the KEK-ATF group and the KEK-Injector group for their helpful support. We would like to thank Marc Ross and Janice Nelson for useful comments and good suggestions. This research was supported by the budget for the Advanced Compact Accelerator Project of National Institute of Radiological Sciences.

PY - 2006/5/10

Y1 - 2006/5/10

N2 - A multi-bunch photo-cathode RF gun system has been developed as an electron source for the production of intense quasi-monochromatic X-rays based on inverse Compton scattering. The desired multi-bunch beam is 100 bunches/pulse with a total charge of 500 nC and a bunch spacing of 2.8 ns. We modified the gun cavity of a 'BNL-type IV' RF gun to allow a CsTe cathode plug in the end plate. The system uses a four-dipole chicane beam line to allow the injection of laser light normal to the cathode surface. We compensate the gun cavity beam loading caused by the high-intensity multi-bunch electron beam by injecting the laser pulse before RF power has filled the cavity. We have achieved a total intensity of 220 nC in 100 bunches with a bunch-to-bunch energy spread under 1.3% (peak-to-peak). This paper concentrates on experiments to generate the high-intensity multi-bunch beam with compensation of the bunch-to-bunch energy spread due to heavy beam loading.

AB - A multi-bunch photo-cathode RF gun system has been developed as an electron source for the production of intense quasi-monochromatic X-rays based on inverse Compton scattering. The desired multi-bunch beam is 100 bunches/pulse with a total charge of 500 nC and a bunch spacing of 2.8 ns. We modified the gun cavity of a 'BNL-type IV' RF gun to allow a CsTe cathode plug in the end plate. The system uses a four-dipole chicane beam line to allow the injection of laser light normal to the cathode surface. We compensate the gun cavity beam loading caused by the high-intensity multi-bunch electron beam by injecting the laser pulse before RF power has filled the cavity. We have achieved a total intensity of 220 nC in 100 bunches with a bunch-to-bunch energy spread under 1.3% (peak-to-peak). This paper concentrates on experiments to generate the high-intensity multi-bunch beam with compensation of the bunch-to-bunch energy spread due to heavy beam loading.

KW - Beam loading

KW - Multi-bunch

KW - Photo-cathode

KW - RF gun

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High-intensity multi-bunch beam generation by a photo-cathode RF gun

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