Quantitative monitoring of the stripper foil degradation in the 3-GeV rapid cycling synchrotron of the Japan proton accelerator research complex

被引：4

作者：

Saha, P. K. ^{[1
]}

Yoshimoto, M. ^{[1
]}

Yamazaki, Y. ^{[1
]}

Hotchi, H. ^{[1
]}

Harada, H. ^{[1
]}

Hayashi, N. ^{[1
]}

Yamamoto, K. ^{[1
]}

Kinsho, M. ^{[1
]}

Irie, Y. ^{[2
]}

机构：

[1] Japan Atom Energy Agcy, J PARC Ctr, Tokai, Ibaraki 3191195, Japan

[2] High Energy Accelerator Res Org, KEK, Tsukuba, Ibaraki 3050801, Japan

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2014年 / 299卷 / 02期

关键词：

J-PARC; 3-GeV RCS; HBC stripper foil; Foil degradation; Foil breaking; Waste beam;

D O I：

10.1007/s10967-013-2636-2

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A hybrid-type boron doped carbon stripper foil of 200 mu g/cm(2) is used for the present H- injection beam energy of 181 MeV in the 3-GeV rapid cycling synchrotron (RCS) of the Japan Proton Accelerator Research Complex (J-PARC). A stripper foil has a certain lifetime and usually lifetime goes shorter for high power operation. Foil degradation such as foil thinning and pinhole formation caused by the radiation might be a signal of the foil breaking. As a result, one can avoid sudden foil breaking by an efficient monitoring of the foil degradation. We have succeeded measuring even a little change of the stripper foil thickness during user operation of the RCS. It is the main motivation of the present study. A single foil was irradiated with a total of 2.7 x 10(21) particles (injected H- itself) during 4 months continuous operation of the RCS but we did not observe any indication of the foil degradation.

引用

页码：1041 / 1046

页数：6

共 7 条

[1] High-intensity Proton Accelerator Project Team, 2003, 2003044 JAERI HIGH I
[2] Hiroki S., 2008, EPAC08, P1131
[3] Direct observation of the phase space footprint of a painting injection in the Rapid Cycling Synchrotron at the Japan Proton Accelerator Research Complex
Saha, P. K.
Shobuda, Y.
Hotchi, H.
Hayashi, N.
Takayanagi, T.
Harada, H.
Irie, Y.
[J]. PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS, 2009, 12 (04):
[4] Sako H., 2008, P 11 EUR PART ACC C, P1272
[5] Suppression of carbon buildup and lifetime improvement by heating carbon stripper foils
Sugai, I.
Oyaizu, M.
Takeda, Y.
Kawakami, H.
Hattori, T.
Kawasaki, K.
[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2011, 269 (03) : 223 - 228
[6] Double-layer effects on the lifetime of newly developed HBC-foils for RCS of J-PARC
Sugai, I.
Takeda, Y.
Oyaizu, M.
Kawakami, H.
Irie, Y.
Takagi, A.
Hattori, H.
Kawasaki, K.
[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2010, 613 (03) : 457 - 461
[7] MEASUREMENT OF THE ELECTRON LOSS CROSS-SECTIONS FOR NEGATIVE HYDROGEN-IONS ON CARBON AT 200-MEV
WEBBER, RC
HOJVAT, C
[J]. IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 1979, 26 (03) : 4012 - 4014

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