Energy degrader and charged particle irradiation system including the same
AssigneeSumitomo Heavy Industries, Ltd.
InventorTakamasa Ueda
Life of this patent
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Abstract
An energy degrader includes: an attenuation member that attenuates energy of entering charged particles to a different amount of energy according to an incident position of the charged particles; an energy adjustment drive unit that drives the attenuation member in a first axial direction in order to change the incident position of the charged particles; and a beam diameter adjustment drive unit that drives the attenuation member in a second axial direction different from the first axial direction in order to adjust the beam diameter of the charged particles.
Claims5
An energy degrader comprising:
- an attenuation member that attenuates energy of entering charged particles to a different amount of energy according to an incident position of the charged particles;
- an energy adjustment drive unit that drives the attenuation member in a first axial direction in order to change the incident position of the charged particles;
- and
- a beam diameter adjustment drive unit that drives the attenuation member in a second axial direction different from the first axial direction in order to adjust the beam diameter of the charged particles.
An energy degrader comprising:
- an attenuation member that attenuates energy of entering charged particles to a different amount of energy according to an incident position of the charged particles;
- energy adjustment drive means for driving the attenuation member in a first axial direction in order to change the incident position of the charged particles;
- and
- beam diameter adjustment drive means for driving the attenuation member in a second axial direction different from the first axial direction in order to adjust the beam diameter of the charged particles.
Dependencies are inferred from the claim text.