IBIC2016 - List of Authors (Yamane, I.)

Paper	Title	Page
THAL03	Multi-Laser-Wire Diagnostic for the Beam Profile Measurement of a Negative Hydrogen Ion Beam in the J-PARC LINAC	856
	A. Miura, K. Okabe, M. Yoshimoto JAEA/J-PARC, Tokai-mura, Japan I. Yamane KEK, Ibaraki, Japan
	In the J-PARC linac, the negative hydrogen ion beam is acceralated to be 400 MeV. Repitition rate will be increased to be from 25 Hz to 50 Hz. The half of 400 MeV beams are injected to the downstream scynchlotoron (RCS) and the other half will be transported to the planned experimental laboratory of the accelerator driven transmutation facility. One of the important issues for the high-current and high-brilliance accelerators is to understand the beam dynamics. The wire scanner monitor is reliably operated in many accelerator facilities around the world. Because the heat loading on a wire is getting increaced in high-current beam tuning, we focused to use a laser wire system. Ionization potential of the negative hydrogen ion is 0.75 eV and one electron is easily detached by a laser beam whose wavelength is adjusted by the Doppler-shift to a large cross-section point. In addition, we propose to use a new multi-laser-wire system. In the new system, we use a pair of concave millors with different diameters to make multi-paths of laser beam, and the beam waists of the laser paths are aligned in principle. In the paper, we propose the multi-laser-wire system and its application.
	Slides THAL03 [1.861 MB]
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-THAL03
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Multi-Laser-Wire Diagnostic for the Beam Profile Measurement of a Negative Hydrogen Ion Beam in the J-PARC LINAC

856

A. Miura, K. Okabe, M. Yoshimoto
JAEA/J-PARC, Tokai-mura, Japan
I. Yamane
KEK, Ibaraki, Japan

In the J-PARC linac, the negative hydrogen ion beam is acceralated to be 400 MeV. Repitition rate will be increased to be from 25 Hz to 50 Hz. The half of 400 MeV beams are injected to the downstream scynchlotoron (RCS) and the other half will be transported to the planned experimental laboratory of the accelerator driven transmutation facility. One of the important issues for the high-current and high-brilliance accelerators is to understand the beam dynamics. The wire scanner monitor is reliably operated in many accelerator facilities around the world. Because the heat loading on a wire is getting increaced in high-current beam tuning, we focused to use a laser wire system. Ionization potential of the negative hydrogen ion is 0.75 eV and one electron is easily detached by a laser beam whose wavelength is adjusted by the Doppler-shift to a large cross-section point. In addition, we propose to use a new multi-laser-wire system. In the new system, we use a pair of concave millors with different diameters to make multi-paths of laser beam, and the beam waists of the laser paths are aligned in principle. In the paper, we propose the multi-laser-wire system and its application.

Slides THAL03 [1.861 MB]

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-THAL03

Export •

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