Enhancement of the positron intensity by a tungsten single-crystal target at the KEKB injector linac

Abstract

A new tungsten single-crystal target has been successfully employed at the positron source of the KEKB injector linac. The crystal thickness was determined to be 10.5 mm based on the previous systematic measurements of the positron-production efficiency. The crystal axis, 〈111〉, was precisely aligned to the direction of the 4-GeV primary electron beam. The positron yield increased by ∼25% compared to that for a conventional tungsten plate with a thickness of 14 mm. On the contrary, the heat load on the crystal target decreased by ∼20%. No degradation of the positron-production efficiency was observed since the crystal target was installed in September 2006, and it has been stably operating at the KEK B-factory.

Original language	English
Title of host publication	Proceedings of the IEEE Particle Accelerator Conference
Pages	2778-2780
Number of pages	3
DOIs	https://doi.org/10.1109/PAC.2007.4440573
Publication status	Published - 2007
Event	IEEE Particle Accelerator Conference, PAC07 - Albuquerque, NM, United States Duration: 25 Jun 2007 → 29 Jun 2007

Other

Other	IEEE Particle Accelerator Conference, PAC07
Country	United States
City	Albuquerque, NM
Period	25.6.07 → 29.6.07

ASJC Scopus subject areas

Engineering(all)

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10.1109/PAC.2007.4440573

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Suwada, T., Satoh, M., Sugimura, T., Kamitani, T., Furukawa, K., Umemori, K., Okuno, H., Haruna, T., Hamatsu, R., Sumiyoshi, T., Yoshida, K., Potylitsin, A. P., Tropin, I. S., & Chehab, R. (2007). Enhancement of the positron intensity by a tungsten single-crystal target at the KEKB injector linac. In Proceedings of the IEEE Particle Accelerator Conference (pp. 2778-2780). [4440573] https://doi.org/10.1109/PAC.2007.4440573

Enhancement of the positron intensity by a tungsten single-crystal target at the KEKB injector linac. / Suwada, T.; Satoh, M.; Sugimura, T.; Kamitani, T.; Furukawa, K.; Umemori, K.; Okuno, H.; Haruna, T.; Hamatsu, R.; Sumiyoshi, T.; Yoshida, K.; Potylitsin, A. P.; Tropin, I. S.; Chehab, R.

Proceedings of the IEEE Particle Accelerator Conference. 2007. p. 2778-2780 4440573.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Suwada, T, Satoh, M, Sugimura, T, Kamitani, T, Furukawa, K, Umemori, K, Okuno, H, Haruna, T, Hamatsu, R, Sumiyoshi, T, Yoshida, K, Potylitsin, AP, Tropin, IS & Chehab, R 2007, Enhancement of the positron intensity by a tungsten single-crystal target at the KEKB injector linac. in Proceedings of the IEEE Particle Accelerator Conference., 4440573, pp. 2778-2780, IEEE Particle Accelerator Conference, PAC07, Albuquerque, NM, United States, 25.6.07. https://doi.org/10.1109/PAC.2007.4440573

Suwada, T. ; Satoh, M. ; Sugimura, T. ; Kamitani, T. ; Furukawa, K. ; Umemori, K. ; Okuno, H. ; Haruna, T. ; Hamatsu, R. ; Sumiyoshi, T. ; Yoshida, K. ; Potylitsin, A. P. ; Tropin, I. S. ; Chehab, R. / Enhancement of the positron intensity by a tungsten single-crystal target at the KEKB injector linac. Proceedings of the IEEE Particle Accelerator Conference. 2007. pp. 2778-2780

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title = "Enhancement of the positron intensity by a tungsten single-crystal target at the KEKB injector linac",

abstract = "A new tungsten single-crystal target has been successfully employed at the positron source of the KEKB injector linac. The crystal thickness was determined to be 10.5 mm based on the previous systematic measurements of the positron-production efficiency. The crystal axis, 〈111〉, was precisely aligned to the direction of the 4-GeV primary electron beam. The positron yield increased by ∼25% compared to that for a conventional tungsten plate with a thickness of 14 mm. On the contrary, the heat load on the crystal target decreased by ∼20%. No degradation of the positron-production efficiency was observed since the crystal target was installed in September 2006, and it has been stably operating at the KEK B-factory.",

author = "T. Suwada and M. Satoh and T. Sugimura and T. Kamitani and K. Furukawa and K. Umemori and H. Okuno and T. Haruna and R. Hamatsu and T. Sumiyoshi and K. Yoshida and Potylitsin, {A. P.} and Tropin, {I. S.} and R. Chehab",

year = "2007",

doi = "10.1109/PAC.2007.4440573",

language = "English",

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pages = "2778--2780",

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AU - Suwada, T.

AU - Satoh, M.

AU - Sugimura, T.

AU - Kamitani, T.

AU - Furukawa, K.

AU - Umemori, K.

AU - Okuno, H.

AU - Haruna, T.

AU - Hamatsu, R.

AU - Sumiyoshi, T.

AU - Yoshida, K.

AU - Potylitsin, A. P.

AU - Tropin, I. S.

AU - Chehab, R.

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AB - A new tungsten single-crystal target has been successfully employed at the positron source of the KEKB injector linac. The crystal thickness was determined to be 10.5 mm based on the previous systematic measurements of the positron-production efficiency. The crystal axis, 〈111〉, was precisely aligned to the direction of the 4-GeV primary electron beam. The positron yield increased by ∼25% compared to that for a conventional tungsten plate with a thickness of 14 mm. On the contrary, the heat load on the crystal target decreased by ∼20%. No degradation of the positron-production efficiency was observed since the crystal target was installed in September 2006, and it has been stably operating at the KEK B-factory.

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