Title:
ENERGY DEGRADER, AND CHARGED PARTICLE IRRADIATION SYSTEM COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2012/099023
Kind Code:
A1
Abstract:
Provided is an energy degrader which can reduce the size of a device, and also provided is a charged particle irradiation system which comprises the energy degrader. As attenuation sections (12) for attenuating energy, portions (11) having thicknesses which vary stepwise or continuously are two-dimensionally arranged in a plane which intersects the advancement direction of charged particles. The energy degrader (10) comprises a driving means (40) for translationally driving the attenuation sections in the directions of first and second intersecting axes (X, Y) in a two-dimensional coordinate system. As a result of using the two-dimensionally arranged attenuation sections, the maximum external shape of the attenuation sections is reduced.
Inventors:
SASAI KENZO (JP)
Application Number:
PCT/JP2012/050633
Publication Date:
July 26, 2012
Filing Date:
January 13, 2012
Export Citation:
Assignee:
SUMITOMO HEAVY INDUSTRIES (JP)
SASAI KENZO (JP)
SASAI KENZO (JP)
International Classes:
G21K1/00; A61N5/10; G21K5/00; H05H7/12; H05H13/00
Foreign References:
| JPH0757900A | 1995-03-03 | |||
| JP2002533888A | 2002-10-08 | |||
| JP2009273632A | 2009-11-26 |
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
Yoshiki Hasegawa (JP)
Yoshiki Hasegawa (JP)
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Claims: