IBIC2017 - List of Authors (Takei, H.)

Paper	Title	Page
WEPCC11	Profile Monitor on Target for Spallation Neutron Source	373
	S.I. Meigo, H. Takei JAEA/J-PARC, Tokai-mura, Japan
	For a high power hadron accelerator facilities such as spallation neutron source in J-PARC (JSNS) and material test facility for ADS called TEF-T, the beam profile monitor is essential. To diagnostic property of the proton beam introduced to the target, a multi-wire profile monitor (MWPM) was utilized, by which one -dimensional profile can be obtained. Since the nonlinear optics is employed to decrease peak current density at the target, two-dimensional information is required. To obtain a two-dimensional profile, we have been developing a new profile monitor based on the luminescence material. Since degradation of luminescence is concerned, which is observed at the SNS monitor system, an experiment was performed by using Al2O3 doped Cr material irradiated with Ar ion beam having the energy of 150 MeV at cyclotron facility in TIARA. During irradiation, degradation of the light yield of luminance was observed. For the development of the monitor less degradation of luminescence, other materials such as Y2O3 irradiation is planned.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-WEPCC11
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WEPCF08	Beam Extraction by the Laser Charge Exchange Method Using the 3-MeV LINACParc	435
	H. Takei, K. Hirano, S.I. Meigo JAEA/J-PARC, Tokai-mura, Japan K. Tsutsumi Nippon Advanced Technology Co., Ltd., Tokai, Japan
	Accelerator-driven system (ADS) is discussed as one of the efficient device to transmute long-lived nuclides. For the efficient transmutation of the minor actinide (MA), precise prediction of neutronics of ADS is indispensable. The Transmutation Physics Experimental Facility (TEF-P) aimed at obtaining experimental data for the accuracy improvement of neutronics evaluation of MA-loaded ADS. The critical assembly installed in TEF-P operates below 500 W to prevent the excessive radio activation of assembly. For the separation of low power beam from J-PARC intense proton accelerator, the meticulous low power beam extraction method from high power proton beam is required. The laser charge exchange method (LCE) is originally developed to measure the proton beam profile and can be applied to the beam separation device for TEF-P. The LCE device consists of bright Nd:YAG-laser and laser transport system with beam position controllers. To demonstrate the charge exchange of the negative proton beam, a preliminary LCE experiment was conducted using a negative proton linac with energy of 3 MeV at RFQ test stand in J-PARC. In this paper, preliminary results of LCE tests are presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-WEPCF08
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Profile Monitor on Target for Spallation Neutron Source

373

S.I. Meigo, H. Takei
JAEA/J-PARC, Tokai-mura, Japan

For a high power hadron accelerator facilities such as spallation neutron source in J-PARC (JSNS) and material test facility for ADS called TEF-T, the beam profile monitor is essential. To diagnostic property of the proton beam introduced to the target, a multi-wire profile monitor (MWPM) was utilized, by which one -dimensional profile can be obtained. Since the nonlinear optics is employed to decrease peak current density at the target, two-dimensional information is required. To obtain a two-dimensional profile, we have been developing a new profile monitor based on the luminescence material. Since degradation of luminescence is concerned, which is observed at the SNS monitor system, an experiment was performed by using Al2O3 doped Cr material irradiated with Ar ion beam having the energy of 150 MeV at cyclotron facility in TIARA. During irradiation, degradation of the light yield of luminance was observed. For the development of the monitor less degradation of luminescence, other materials such as Y2O3 irradiation is planned.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-WEPCC11

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPCF08

Beam Extraction by the Laser Charge Exchange Method Using the 3-MeV LINACParc

435

H. Takei, K. Hirano, S.I. Meigo
JAEA/J-PARC, Tokai-mura, Japan
K. Tsutsumi
Nippon Advanced Technology Co., Ltd., Tokai, Japan

Accelerator-driven system (ADS) is discussed as one of the efficient device to transmute long-lived nuclides. For the efficient transmutation of the minor actinide (MA), precise prediction of neutronics of ADS is indispensable. The Transmutation Physics Experimental Facility (TEF-P) aimed at obtaining experimental data for the accuracy improvement of neutronics evaluation of MA-loaded ADS. The critical assembly installed in TEF-P operates below 500 W to prevent the excessive radio activation of assembly. For the separation of low power beam from J-PARC intense proton accelerator, the meticulous low power beam extraction method from high power proton beam is required. The laser charge exchange method (LCE) is originally developed to measure the proton beam profile and can be applied to the beam separation device for TEF-P. The LCE device consists of bright Nd:YAG-laser and laser transport system with beam position controllers. To demonstrate the charge exchange of the negative proton beam, a preliminary LCE experiment was conducted using a negative proton linac with energy of 3 MeV at RFQ test stand in J-PARC. In this paper, preliminary results of LCE tests are presented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-WEPCF08

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)