Title:
CIRCULAR ACCELERATOR AND, BEAM EMITTING METHOD AND DEVICE
Document Type and Number:
Japanese Patent JP2596292
Kind Code:
B2
Abstract:
PURPOSE: To keep beam emitting position and beam diameter constant and prevent a beam loss by conducting the increase of amplitude for beam emission by the resonance of betatron vibration, and emitting the particle exceeding the safety limit of the resonance.
CONSTITUTION: After a beam is accelerated to a determined energy, a high frequency accelerating cavity 8 is stopped, and a converging quadrupole electromagnet 5 and a divergent quadrupole electromagnet 7 are regulated to form a horizontal frequency of a determined value. Then, a current for resonance excitement is sent to a six-electrode electromagnet 9. This current is set to a value in which the beam under circulating stably circulates while conducting betatron vibration. An irregular time change signal is applied to the beam by a high frequency applying device 14, whereby the orbit gradient of the beam is changed to increase the amplitude by vibration. Consequently, the particle exceeding the safety limit is emitted from an emitting deflector 13. Thus, the beam having a constant emitting position and beam diameter can be emitted, and a beam loss is prevented.
Inventors:
Kazuo Hiramoto
Junichi Hirota
Masatsugu Nishi
Hiroyuki Watanabe
Junichi Hirota
Masatsugu Nishi
Hiroyuki Watanabe
Application Number:
JP24993592A
Publication Date:
April 02, 1997
Filing Date:
September 18, 1992
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
H05H13/04; A61N5/10; H05H7/10; (IPC1-7): H05H13/04; A61N5/10; H05H7/10
Attorney, Agent or Firm:
Ogawa Katsuo