Title:
LASER ION SOURCE, CIRCULAR ACCELERATOR, AND PARTICLE THERAPY SYSTEM
Document Type and Number:
WIPO Patent Application WO/2022/123821
Kind Code:
A1
Abstract:
The present invention makes it possible to obtain an ion beam having a relatively long pulse width. A laser ion source (20) comprises: a laser oscillator (201) that outputs a laser beam (LB); a target (205) that generates plasma (PL) by being irradiated with the laser beam from the laser oscillator; and a plasma transport unit (207) that transports the generated plasma toward an extraction electrode (206) for extracting an ion beam (12). At least a portion of the plasma transport unit is provided in a magnetic pole (21) for forming a magnetic field that generates an orbit of the ion beam. This allows the generated plasma to be converged by a residual magnetic field in the magnetic pole (21).
Inventors:
SEKI TAKAYOSHI (JP)
NAKASHIMA YUTO (JP)
NAKASHIMA YUTO (JP)
Application Number:
PCT/JP2021/028896
Publication Date:
June 16, 2022
Filing Date:
August 04, 2021
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H01J37/08; A61N5/10; G21K1/00; G21K5/04; H01J27/24; H05H1/24; H05H13/00
Domestic Patent References:
| WO2020166116A1 | 2020-08-20 | |||
| WO2018096648A1 | 2018-05-31 |
Foreign References:
| JP2020135958A | 2020-08-31 | |||
| JP2018524764A | 2018-08-30 | |||
| JP2014102990A | 2014-06-05 | |||
| JP2019169255A | 2019-10-03 | |||
| JP2015109247A | 2015-06-11 |
Attorney, Agent or Firm:
WILLFORT INTERNATIONAL PATENT FIRM (JP)
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