Alternating-phase-focused IH-DTL for an injector of heavy-ion medical accelerators

被引：31

作者：

Iwata, Y.

Yamada, S.

Murakami, T.

Fujimoto, T.

Fujisawa, T.

Ogawa, H.

Miyahara, N.

Yamamoto, K.

Hojo, S.

Sakamoto, Y.

Muramatsu, M.

Takeuchi, T.

Mitsumoto, T.

Tsutsui, H.

Watanabe, T.

Ueda, T.

机构：

[1] Natl Inst Radiol Sci, Dept Accelerator & Med Phys, Inage Ku, Chiba 26385555, Japan

[2] Accelerator Engn Corp, Inage Ku, Chiba 2630043, Japan

[3] Sumitomo Heavy Ind Ltd, Shinagawa Ku, Tokyo 1418686, Japan

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2006年 / 569卷 / 03期

关键词：

heavy ion linac; Interdigital H-mode (IH); Alternating-Phase-Focusing (APF); medical accelerator;

D O I：

10.1016/j.nima.2006.09.057

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A compact Drift-Tube-Linac (DTL) using all Interdigital H-mode (1H) cavity was designed for all injector of medical accelerators. For beam focusing, the method of Alternating-Phase-Focusing (APF) was applied. The APF IH-DTL can accelerate heavy ions having a charge-to-mass ratio of q/m = 1/3 up to 4.0MeV/u. Having optimized all array of synchronous phases for cells, namely arranging drift tubes and gaps appropriately, both longitudinal and transverse focusing strengths were produced just with the rf acceleration field, and therefore no focusing element or cooling equipments had to be installed in the cavity. This allowed us to employ a rather high operating frequency, and hence to design a compact and cost-effective cavity. A further advantage of the APF linac call be found in its operation. Since the parameters to be adjusted are just the level and phase of the input rf, beam tuning can be made with ease. Consequently, the APF linac is suitable for an injector for medical accelerators. Tuning methods of the gap voltages and cavity frequency as well as the design of the cavity for APF I H-DTL have been developed. After constructing the cavity, measurements of the electric field and tuning of the gap voltages were performed. Finally, the rf power was fed into the cavity. In this paper, the design and results of the measurements are described. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：685 / 696

页数：12

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