LINAC2016 - List of Authors (Oguri, H.)

Paper	Title	Page
MOPLR052	LEBT Commissioning of the J-PARC LINAC	251
	T. Shibata, K. Ikegami, T. Maruta, K. Ohkoshi J-PARC, KEK & JAEA, Ibaraki-ken, Japan H. Asano, Y. Kondo, A. Miura, H. Oguri JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan Y. Liu KEK/JAEA, Ibaraki-Ken, Japan F. Naito, A. Takagi KEK, Tokai, Ibaraki, Japan
	After upgrade of J-PARC Linac in 2014, Low Energy Beam Transport (LEBT) beam commissioning of the J-PARC LINAC has been made for improving H-beam intensity extracted from Linac. Currents of two solenoid coils and steering magnets in LEBT are optimized with extraction and acceleration voltages for static acceleration in ion source (IS) which decides on an initial emittance diagram of H⁻ beam. As a result of LEBT and IS parameter optimization, beam transmission rate of RFQ has been reached up to 96 % in 50 mA H⁻ current operation. Moreover, PIC-MC (Particle-In-Cell Monte-Carlo) simulation model is developed for H⁻ transport in LEBT. Comparison between experimental and numerical results are presented to clarify beam physics from IS exit to RFQ entrance.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-MOPLR052
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MOPLR071	A 3-MeV Linac for Development of Accelerator Components at J-PARC	298
	Y. Kondo, H. Asano, E. Chishiro, K. Hirano, T. Itou, Y. Kawane, N. Kikuzawa, S.I. Meigo, A. Miura, S. Mizobata, T. Morishita, H. Oguri, K. Ohkoshi, A. Ohzone, Y. Sato, S. Shinozaki, K. Shinto, H. Takei, K. Tsutsumi JAEA/J-PARC, Tokai-mura, Japan Z. Fang, Y. Fukui, K. Futatsukawa, K. Ikegami, T. Miyao, K. Nanmo, T. Shibata, T. Sugimura, A. Takagi KEK, Ibaraki, Japan T. Hori Nippon Advanced Technology Co., Ltd., Tokai, Japan T. Ishiyama, T. Maruta KEK/JAEA, Ibaraki-Ken, Japan M. Mayama, Y. Sawabe Mitsubishi Electric System & Service Co., Ltd, Tsukuba, Japan
	We are constructing a linac for development of accelerator components at J-PARC. This linac consists of a H⁻ ion source, a low energy beam transport (LEBT), an radio frequency quadrupole (RFQ) linac, and a diagnostics bean line. The beam energy is 3 MeV, the beam current is 30 mA, and the duty factor is 0.6%, which corresponds to 0.5 kW. The accelerator itself has a capacity of at least 1 kW. However, the beam power is limited by radiation dose, because there are no radiation shields between the accessible area during the operation. The source and LEBT are same as the J-PARC linac's. The RFQ is a used one in the J-PARC linac, called RFQ I. At first, we are planning to conduct experiments of the laser charge exchange development for the transmutation facility. Then, this linac will be used for the development accelerator components such as beam scrapers, bunch shape monitors, laser profile monitors, and so on. We will be able to install new devices into the actual J-PARC linac after the full testing. The development of H⁻ ion source can be carried out at this system, and also RFQ in the future. In this paper, present status of this 3-MeV linac at J-PARC is presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-MOPLR071
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

LEBT Commissioning of the J-PARC LINAC

251

T. Shibata, K. Ikegami, T. Maruta, K. Ohkoshi
J-PARC, KEK & JAEA, Ibaraki-ken, Japan
H. Asano, Y. Kondo, A. Miura, H. Oguri
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan
Y. Liu
KEK/JAEA, Ibaraki-Ken, Japan
F. Naito, A. Takagi
KEK, Tokai, Ibaraki, Japan

After upgrade of J-PARC Linac in 2014, Low Energy Beam Transport (LEBT) beam commissioning of the J-PARC LINAC has been made for improving H-beam intensity extracted from Linac. Currents of two solenoid coils and steering magnets in LEBT are optimized with extraction and acceleration voltages for static acceleration in ion source (IS) which decides on an initial emittance diagram of H⁻ beam. As a result of LEBT and IS parameter optimization, beam transmission rate of RFQ has been reached up to 96 % in 50 mA H⁻ current operation. Moreover, PIC-MC (Particle-In-Cell Monte-Carlo) simulation model is developed for H⁻ transport in LEBT. Comparison between experimental and numerical results are presented to clarify beam physics from IS exit to RFQ entrance.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-MOPLR052

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MOPLR071

A 3-MeV Linac for Development of Accelerator Components at J-PARC

298

Y. Kondo, H. Asano, E. Chishiro, K. Hirano, T. Itou, Y. Kawane, N. Kikuzawa, S.I. Meigo, A. Miura, S. Mizobata, T. Morishita, H. Oguri, K. Ohkoshi, A. Ohzone, Y. Sato, S. Shinozaki, K. Shinto, H. Takei, K. Tsutsumi
JAEA/J-PARC, Tokai-mura, Japan
Z. Fang, Y. Fukui, K. Futatsukawa, K. Ikegami, T. Miyao, K. Nanmo, T. Shibata, T. Sugimura, A. Takagi
KEK, Ibaraki, Japan
T. Hori
Nippon Advanced Technology Co., Ltd., Tokai, Japan
T. Ishiyama, T. Maruta
KEK/JAEA, Ibaraki-Ken, Japan
M. Mayama, Y. Sawabe
Mitsubishi Electric System & Service Co., Ltd, Tsukuba, Japan

We are constructing a linac for development of accelerator components at J-PARC. This linac consists of a H⁻ ion source, a low energy beam transport (LEBT), an radio frequency quadrupole (RFQ) linac, and a diagnostics bean line. The beam energy is 3 MeV, the beam current is 30 mA, and the duty factor is 0.6%, which corresponds to 0.5 kW. The accelerator itself has a capacity of at least 1 kW. However, the beam power is limited by radiation dose, because there are no radiation shields between the accessible area during the operation. The source and LEBT are same as the J-PARC linac's. The RFQ is a used one in the J-PARC linac, called RFQ I. At first, we are planning to conduct experiments of the laser charge exchange development for the transmutation facility. Then, this linac will be used for the development accelerator components such as beam scrapers, bunch shape monitors, laser profile monitors, and so on. We will be able to install new devices into the actual J-PARC linac after the full testing. The development of H⁻ ion source can be carried out at this system, and also RFQ in the future. In this paper, present status of this 3-MeV linac at J-PARC is presented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-MOPLR071

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