Development of high-quality intense proton beam at the rcnp cyclotron facility

M. Fukuda, K. Hatanaka, T. Yorita, H. Yamamoto, T. Saito, Hiroshi Ueda, H. Tamura, M. Kibayashi, K. Nagayama, Y. Yasuda, S. Morinobu, S. Kurashima

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

An upgrade program for increase of beam intensity and improvement of beam quality is in progress at the cyclotron facility of Research Center for Nuclear Physics(RCNP). A 2.45 GHz ECR proton source was modified to increase 392 MeV proton beam intensity. Rated output power of a microwave power supply was increased from 200 W to 2 kW. A water-cooled waveguide system for high power microwave transfer is being installed for the proton source. A 15 keV proton beam with intensity of 0.6 mA was stably produced for output microwave power of 200 W. Emittance of 50 to 100 mm-mrad was obtained for 0.05 to 0.1 mA proton beams in the LEBT system. Beam transmission, defined by the ratio of the beam intensity between a Faraday cup placed in the axial injection beam line and an inflector electrode of the AVF cyclotron, was improved from 25 % for a 0.07 mA proton beam to more than 90 % for 0.03 mA, which indicated that the beam transmission was limited by the acceptance of the axial injection beam line. A new active gradient corrector is being designed for horizontal beam focusing in the extraction region of the AVF cyclotron and for reducing a beam loss at the vacuum chamber in the extraction region. An asymmetric dee voltage distribution at an acceleration gap is being analyzed for improvement of a flat-top acceleration system of the AVF cyclotron.

Original languageEnglish
Title of host publicationIPAC 2011 - 2nd International Particle Accelerator Conference
Pages2694-2696
Number of pages3
Publication statusPublished - 2011
Externally publishedYes
Event2nd International Particle Accelerator Conference, IPAC 2011 - Kursaal, San Sebastian, Spain
Duration: Sep 4 2011Sep 9 2011

Other

Other2nd International Particle Accelerator Conference, IPAC 2011
CountrySpain
CityKursaal, San Sebastian
Period9/4/119/9/11

Fingerprint

proton beams
cyclotrons
beam injection
microwaves
protons
output
nuclear physics
vacuum chambers
emittance
power supplies
acceptability
waveguides
gradients
electrodes
electric potential
water

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Fukuda, M., Hatanaka, K., Yorita, T., Yamamoto, H., Saito, T., Ueda, H., ... Kurashima, S. (2011). Development of high-quality intense proton beam at the rcnp cyclotron facility. In IPAC 2011 - 2nd International Particle Accelerator Conference (pp. 2694-2696)

Development of high-quality intense proton beam at the rcnp cyclotron facility. / Fukuda, M.; Hatanaka, K.; Yorita, T.; Yamamoto, H.; Saito, T.; Ueda, Hiroshi; Tamura, H.; Kibayashi, M.; Nagayama, K.; Yasuda, Y.; Morinobu, S.; Kurashima, S.

IPAC 2011 - 2nd International Particle Accelerator Conference. 2011. p. 2694-2696.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Fukuda, M, Hatanaka, K, Yorita, T, Yamamoto, H, Saito, T, Ueda, H, Tamura, H, Kibayashi, M, Nagayama, K, Yasuda, Y, Morinobu, S & Kurashima, S 2011, Development of high-quality intense proton beam at the rcnp cyclotron facility. in IPAC 2011 - 2nd International Particle Accelerator Conference. pp. 2694-2696, 2nd International Particle Accelerator Conference, IPAC 2011, Kursaal, San Sebastian, Spain, 9/4/11.
Fukuda M, Hatanaka K, Yorita T, Yamamoto H, Saito T, Ueda H et al. Development of high-quality intense proton beam at the rcnp cyclotron facility. In IPAC 2011 - 2nd International Particle Accelerator Conference. 2011. p. 2694-2696
Fukuda, M. ; Hatanaka, K. ; Yorita, T. ; Yamamoto, H. ; Saito, T. ; Ueda, Hiroshi ; Tamura, H. ; Kibayashi, M. ; Nagayama, K. ; Yasuda, Y. ; Morinobu, S. ; Kurashima, S. / Development of high-quality intense proton beam at the rcnp cyclotron facility. IPAC 2011 - 2nd International Particle Accelerator Conference. 2011. pp. 2694-2696
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abstract = "An upgrade program for increase of beam intensity and improvement of beam quality is in progress at the cyclotron facility of Research Center for Nuclear Physics(RCNP). A 2.45 GHz ECR proton source was modified to increase 392 MeV proton beam intensity. Rated output power of a microwave power supply was increased from 200 W to 2 kW. A water-cooled waveguide system for high power microwave transfer is being installed for the proton source. A 15 keV proton beam with intensity of 0.6 mA was stably produced for output microwave power of 200 W. Emittance of 50 to 100 mm-mrad was obtained for 0.05 to 0.1 mA proton beams in the LEBT system. Beam transmission, defined by the ratio of the beam intensity between a Faraday cup placed in the axial injection beam line and an inflector electrode of the AVF cyclotron, was improved from 25 {\%} for a 0.07 mA proton beam to more than 90 {\%} for 0.03 mA, which indicated that the beam transmission was limited by the acceptance of the axial injection beam line. A new active gradient corrector is being designed for horizontal beam focusing in the extraction region of the AVF cyclotron and for reducing a beam loss at the vacuum chamber in the extraction region. An asymmetric dee voltage distribution at an acceleration gap is being analyzed for improvement of a flat-top acceleration system of the AVF cyclotron.",
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AU - Fukuda, M.

AU - Hatanaka, K.

AU - Yorita, T.

AU - Yamamoto, H.

AU - Saito, T.

AU - Ueda, Hiroshi

AU - Tamura, H.

AU - Kibayashi, M.

AU - Nagayama, K.

AU - Yasuda, Y.

AU - Morinobu, S.

AU - Kurashima, S.

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