1–6 Jun 2025
Taipei International Convention Center (TICC)
Asia/Taipei timezone

A study on the pattern waveform high-voltage power supply for the rapid cycling induction synchrotron

WEPB043
4 Jun 2025, 16:00
2h
Exhibiton Hall A _Bear (TWTC)

Exhibiton Hall A _Bear

TWTC

Poster Presentation MC7.T11 Power Supplies Wednesday Poster Session

Speaker

Katsuya Okamura (High Energy Accelerator Research Organization)

Description

The application of a 10 Hz repetitive induction synchrotron (IS) to the next generation of heavy ion therapy drivers is under investigation *. The IS is characterized by the use of a pulse voltage to accelerate the beam, but until now, due to technical limitations, the magnitude of the pulse voltage could not be perfectly matched to the acceleration conditions. Instead, a pulse density modulation method has been adopted. However, this method inevitably induces synchro-beta coupling, which increases beam emittance. To overcome this problem, we develop a pattern-voltage dc power supply in which the output voltage waveform has a sinusoidal half-wave shape that matches the acceleration conditions. First, a mini-model was fabricated, and comparative experiments were conducted with three different circuit schemes: (A) a bipolar-controlled full-bridge circuit, (B) a unipolar-controlled full-bridge circuit, and (C) a series connected half-bridge circuit. This paper describes the results of these tests and issues for future study.

Funding Agency

This study is supported by Grant-In-Aid for Scientific Research (B) (KAKENHI No. 23H03666).

Footnotes

  • Leo Kwee Wah et al., Phys. Rev. Accel. and Beams 19, 042802 (2016).
    ** K. Takayama et al., Phys. Rev. Accelerators and Beams 24, 011601 (2021).
Region represented Asia
Paper preparation format Word

Author

Katsuya Okamura (High Energy Accelerator Research Organization)

Co-authors

Akira Tokuchi (Pulsed Power Japan Laboratory Ltd.) Ken Takayama (High Energy Accelerator Research Organization) Takashi Yoshimoto (High Energy Accelerator Research Organization)

Presentation materials

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