Development of thick hybrid-type carbon stripper foils with high durability at 1800K for RCS of J-PARC

Sugai, I.; Takeda, Yasuhiro; Oyaizu, M.; Kawakami, H.; Irie, Y.; Arakida, Y.; Hara, K.; Hattori, Hiroki; Kawasaki, K.; Kamiya, J.; Kinsho, Michikazu; Kuramochi, K.

doi:10.1016/j.nima.2005.12.225

Cited by 40 publications

(15 citation statements)

References 11 publications

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“…That temperature can be estimated moderately well by assuming that the loss of heat (primarily by radiation) balances the input heat deposited via the energy losses of the ions and electrons incident upon the foil. Assuming negligible radiation from the surroundings to the foil, T is then given by T ¼ ½ðP=AÞ=ð2esÞ 1=4 (1) where P/A is the power per unit area absorbed by the foil, e is its emissivity, and s is the Stefan-Boltzmann constant. The factor of 2 accounts for the emission from both faces of the foil.…”

Section: Stability and Deterioration Of Carbon Foilsmentioning

confidence: 99%

“…More-complex calculations have been done, making various assumptions concerning the stopping powers and emissivities of carbon foils, heat losses via conduction, etc. [1][2][3][4]. Fig.…”

Section: Stability and Deterioration Of Carbon Foilsmentioning

confidence: 99%

“…(1) and also as calculated by Liaw et al [2] for a pulsed beam at the spallation neutron source (SNS). Diamond stripper foils have been studied by several authors with mixed results [1,[3][4][5][6]. Diamond is a mechanically strong material, but it is transparent over the wavelength range 0.27-2.6 mm [7] and cannot radiate in this region.…”

Section: Stability and Deterioration Of Carbon Foilsmentioning

confidence: 99%

“…Diamond foils must cool by radiating outside this wavelength region, hence must reach temperatures higher than the other forms of carbon. Above 1800 K, graphitization of diamond foils is expected to occur [1,8]. The resulting dimensional changes with accompanying stresses may limit the utility of diamond foils; diamond foils are not considered further in this work.…”

Section: Stability and Deterioration Of Carbon Foilsmentioning

confidence: 99%

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New methods for testing cyclotron carbon stripper foils

Miller

Jolivet

Stoner

2008

Nuclear Instruments and Methods in Physics Research Section A:

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Section: Stability and Deterioration Of Carbon Foilsmentioning

confidence: 99%

“…More-complex calculations have been done, making various assumptions concerning the stopping powers and emissivities of carbon foils, heat losses via conduction, etc. [1][2][3][4]. Fig.…”

Section: Stability and Deterioration Of Carbon Foilsmentioning

confidence: 99%

Section: Stability and Deterioration Of Carbon Foilsmentioning

confidence: 99%

Section: Stability and Deterioration Of Carbon Foilsmentioning

confidence: 99%

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New methods for testing cyclotron carbon stripper foils

Miller

Jolivet

Stoner

2008

Nuclear Instruments and Methods in Physics Research Section A:

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“…It is important for a charge stripper foil to endure heat load by energy deposition from the beam. For a charge stripper foil in the RCS, we applied a Hybrid type thick Boron-doped Carbon (HBC: Boron 25 %) foil which is produced with the arc-discharge method developed by Sugai and has enough toughness to stand high-intensity beam irradiation [1]. For the beam operation in RCS, the required foil thickness is about 1 lm (200 lg/cm 2 ) corresponding to a conversion efficiency of 99.7 % for 181 MeV injection from the linac [2].…”

Section: Introductionmentioning

confidence: 99%

Analyses and the effect of impurities contained in charge stripper foils for the 3-GeV RCS of J-PARC

Yamazaki

Yoshimoto

Saha

et al. 2015

J Radioanal Nucl Chem

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In J-PARC, the 3 GeV rapid cycling synchrotron (RCS) applied hybrid type thick boron-doped carbon (HBC) foils as charge stripper in the multi-turn injection. Although HBC foils have successfully operated to provide a high-power beam for experimental users since the operation of the accelerator started, the deformation and radio-activation of the foils occurred as serious problems. We investigated the cause of the problems, as result we found that impurities in the foil led to these phenomena. In this report, we describe why impurities were mixed in the foil, and which kinds of impurities were found by various methods of analysis. The effect of impurities is also discussed.

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Targets for Particle Accelerators

Lommel

Kindler

2009

Digital Encyclopedia of Applied Physics

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This article gives an overview of the different targets applied in particle accelerators and a short introduction to the material demands and the techniques established for the production. The main emphasis is placed not only on solid targets and strategies to increase their lifetime but also liquid and internal targets are touched. Special production processes for highly enriched isotopes are discussed. Finally, characterization in the sense of thickness, purity, and homogeneity is an important issue. This review is meant to be an outline, so we have provided an extensive bibliography furnishing details of the original publications.

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Development of thick hybrid-type carbon stripper foils with high durability at 1800K for RCS of J-PARC

Cited by 40 publications

References 11 publications

New methods for testing cyclotron carbon stripper foils

New methods for testing cyclotron carbon stripper foils

Analyses and the effect of impurities contained in charge stripper foils for the 3-GeV RCS of J-PARC

Targets for Particle Accelerators

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