Fast beam cut-off method in RF-knockout extraction for spot-scanning

被引：24

作者：

Furukawa, T

Noda, K

机构：

[1] Natl Inst Radiol Sci, Dept Accelerator Phys & Engn, Inage Ku, Chiba 2638555, Japan

[2] Chiba Univ, Grad Sch Sci & Technol, Inage Ku, Chiba 2638522, Japan

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2002年 / 489卷 / 1-3期

关键词：

RF-knockout slow extraction; synchrotron; heavy-ion therapy; dose management; spot-scanning;

D O I：

10.1016/S0168-9002(02)00895-1

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 [仪器科学与技术]; 080401 [精密仪器及机械]; 081102 [检测技术与自动化装置];

摘要：

An irradiation method with magnetic scanning has been developed in order to provide accurate irradiation even for an irregular target shape. The scanning method has strongly required a lower ripple of the beam spill and a faster response to beam-on/off in slow extraction from a synchrotron ring. At HIMAC, RF-knockout extraction has utilized a bunched beam to reduce the beam-spill ripple, Therefore, particles near the resonance can be spilled out from the separatrices by synchrotron oscillation as well as by a transverse RF field, From this point of view, a fast beam cut-off method has been proposed and verified by both simulations and experiments. The maximum delay from the beam cutoff signal to beam-off has been improved to around 60 mus from 700 mus by a usual method. Unwanted dose has been considerably reduced by around a factor of 10 compared with that by the usual method. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：59 / 67

页数：9

共 23 条

[1]

*ACC COMPL STUD GR, 1999, 99010 CERNPS DI ACC

[2]

*AK ITANO, 2001, P 13 S ACC SCI TECHN, P160

[3]

CHU W, 1993, LBL33749

[4]

INSTRUMENTATION FOR TREATMENT OF CANCER USING PROTON AND LIGHT-ION BEAMS [J].