Development of Cyclotron Beam Technology for Applications in Materials Science and Biotechnology at JAERI-TIARA

Journal Article · Tue Aug 26 04:00:00 EDT 2003 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1619892· OSTI ID:20632528

Ohara, Y; Arakawa, K; Fukuda, M; Kamiya, T; Kurashima, S; Nakamura, Y; Okumura, S; Saidoh, M; Tajima, S ^[1]

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1. Takasaki Radiation Chemistry Research Establishment, Japan Atomic Energy Research Institute, 1233 Watanuki, Takasaki, Gunma, 370-1292 (Japan)

Recent progress of cyclotron ion beam development for applications in materials science and biotechnology at the ion-irradiation research facility TIARA of the Japan Atomic Energy Research Institute(JAERI) is overviewed. The AVF cyclotron in TIARA can accelerate protons and heavy ions up to 90 MeV and 27.5 MeV/n, respectively. In order to conform to the requirement of a reliable tuning of microbeam formation, the cyclotron beam current has been stabilized by controlling the temperature of the magnet yoke and pole within +/-0.5 deg. and hence by decreasing the variation of the magnetic field {delta}B/B below 10-5. A heavy ion microbeam with energy of hundreds MeV is a significantly useful probe for researches on biofunctional elucidation in biotechnology. Production of the microbeam with spot size as small as 1{mu}m by quadrupole lenses requires the energy spread of the beam {delta}E/E < 2 x 10-4. In order to minimize the energy spread of the cyclotron beam, the fifth-harmonic voltage waveform has been successfully superposed on the fundamental one to make energy gain uniform.

• OSTI ID: 20632528
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 680; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
43 PARTICLE ACCELERATORS
BEAM CURRENTS
BIOTECHNOLOGY
CYCLOTRON RESONANCE
CYCLOTRONS
ELECTROMAGNETIC LENSES
HEAVY IONS
ION BEAMS
MAGNETIC FIELDS
MATERIALS TESTING
MEV RANGE 10-100
PROTON BEAMS
QUADRUPOLES
TUNING
WAVE FORMS