HB2018 - List of Authors (Miura, A.)

Paper	Title	Page
MOP2WB01	60 mA Beam Study in J-PARC Linac	60
	Y. Liu KEK/JAEA, Ibaraki-Ken, Japan A. Miura JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan T. Miyao KEK, Ibaraki, Japan M. Otani, T. Shibata J-PARC, KEK & JAEA, Ibaraki-ken, Japan
	Upgrade of Linac peak current from 50 mA to 60 mA is one of the keys to the next power upgrade in J-PARC. Beam studies with 60 mA were carried out in July and December, 2017, for the challenging issues such as investigation of beam property from the ion source, halo behavior throughout the LEBT, RFQ and MEBT1, emittance/Twiss measurement at MEBT1, beam emittance control, etc. Expected/unexpected problems, intermediate results and preparation for the next trials were introduced in this paper.
	Slides MOP2WB01 [12.952 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-MOP2WB01
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THP1WC02	Status of Proof-of-Principle Demonstration of 400 MeV H-Stripping to Proton by Using Only Lasers at J-PARC	422
	P.K. Saha, H. Harada, M. Kinsho, A. Miura, M. Yoshimoto JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan Y. Irie, I. Yamane KEK, Ibaraki, Japan Y. Michine, H. Yoneda University of Electro-communications, Tokyo, Japan
	In order to make a breakthrough in the conventional H⁻ charge-exchange injection done by using solid stripper foil, we proposed a completely new method H⁻ stripping to proton by using only lasers. Extremely high residual radiation due foil beam interaction beam losses as well as unreliable and short lifetime of the stripper foil are already serious issues in all existing high intensity proton machines. To established our new principle, experimental studies for a proof-of-principle (POP) demonstration at 400 MeV H⁻ beam energy is under preparation at J-PARC. A vacuum chamber for the POP demonstration has already been installed at the end section of 400 MeV H⁻ beam transport of J-PARC Linac. The H⁻ beam manipulations, numerical simulations as well as the laser beam studies are in progress. The present status of the POP demonstration of 400 MeV H⁻ stripping to protons by using only lasers are presented.
	Slides THP1WC02 [7.535 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-THP1WC02
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

60 mA Beam Study in J-PARC Linac

60

Y. Liu
KEK/JAEA, Ibaraki-Ken, Japan
A. Miura
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan
T. Miyao
KEK, Ibaraki, Japan
M. Otani, T. Shibata
J-PARC, KEK & JAEA, Ibaraki-ken, Japan

Upgrade of Linac peak current from 50 mA to 60 mA is one of the keys to the next power upgrade in J-PARC. Beam studies with 60 mA were carried out in July and December, 2017, for the challenging issues such as investigation of beam property from the ion source, halo behavior throughout the LEBT, RFQ and MEBT1, emittance/Twiss measurement at MEBT1, beam emittance control, etc. Expected/unexpected problems, intermediate results and preparation for the next trials were introduced in this paper.

Slides MOP2WB01 [12.952 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-MOP2WB01

Export •

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

THP1WC02

Status of Proof-of-Principle Demonstration of 400 MeV H-Stripping to Proton by Using Only Lasers at J-PARC

422

P.K. Saha, H. Harada, M. Kinsho, A. Miura, M. Yoshimoto
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan
Y. Irie, I. Yamane
KEK, Ibaraki, Japan
Y. Michine, H. Yoneda
University of Electro-communications, Tokyo, Japan

In order to make a breakthrough in the conventional H⁻ charge-exchange injection done by using solid stripper foil, we proposed a completely new method H⁻ stripping to proton by using only lasers. Extremely high residual radiation due foil beam interaction beam losses as well as unreliable and short lifetime of the stripper foil are already serious issues in all existing high intensity proton machines. To established our new principle, experimental studies for a proof-of-principle (POP) demonstration at 400 MeV H⁻ beam energy is under preparation at J-PARC. A vacuum chamber for the POP demonstration has already been installed at the end section of 400 MeV H⁻ beam transport of J-PARC Linac. The H⁻ beam manipulations, numerical simulations as well as the laser beam studies are in progress. The present status of the POP demonstration of 400 MeV H⁻ stripping to protons by using only lasers are presented.

Slides THP1WC02 [7.535 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-THP1WC02

Export •

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