IBIC2017 - List of Authors (Miura, A.)

Paper	Title	Page
TUPCF12	Measurement of Each 324 MHz Micro Pulse Stripping Efficiency for H⁻ Laser Stripping Experiment in J-PARC RCS	233
	P.K. Saha, H. Harada, N. Hayashi, A. Miura, K. Okabe, M. Yoshimoto JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan
	In 3-GeV RCS of J-PARC, an experiment for H⁻ stripping to protons by using lasers is under preparation. The experiment requires measurements of all three charge fractions of each 324 MHz H-μpulse in the downstream of laser and H⁻ interaction point (IP). However, at the first stage, only a single H-μpulse is aimed to strip by using lasers. It is therefore very essential to establish a new measurement method for that purpose, which has not yet been studied anywhere in that direction. We consider measuring BPM (beam position monitor) pickup signal by using an oscilloscope of 4 GHz bandwidth and sampling rate no less than 1TS/s. To test the system, we have done some experimental studies, where beam halo scrapper (carbon foil), placed at the L-3BT (linac to 3-GeV beam transport) is used for H⁻ stripping. The unstripped H⁻ and the stripped protons separated by a bending magnet in the downstream of the scrapper are simultaneously measured by two BPMs in two beam lines. The H-μpulses were clearly measured with good resolution, where a ratio of the pulses without and with scrapper gives the stripping efficiency. A detail of the present study results are presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-TUPCF12
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Paper

Title

Page

Measurement of Each 324 MHz Micro Pulse Stripping Efficiency for H⁻ Laser Stripping Experiment in J-PARC RCS

233

P.K. Saha, H. Harada, N. Hayashi, A. Miura, K. Okabe, M. Yoshimoto
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan

In 3-GeV RCS of J-PARC, an experiment for H⁻ stripping to protons by using lasers is under preparation. The experiment requires measurements of all three charge fractions of each 324 MHz H-μpulse in the downstream of laser and H⁻ interaction point (IP). However, at the first stage, only a single H-μpulse is aimed to strip by using lasers. It is therefore very essential to establish a new measurement method for that purpose, which has not yet been studied anywhere in that direction. We consider measuring BPM (beam position monitor) pickup signal by using an oscilloscope of 4 GHz bandwidth and sampling rate no less than 1TS/s. To test the system, we have done some experimental studies, where beam halo scrapper (carbon foil), placed at the L-3BT (linac to 3-GeV beam transport) is used for H⁻ stripping. The unstripped H⁻ and the stripped protons separated by a bending magnet in the downstream of the scrapper are simultaneously measured by two BPMs in two beam lines. The H-μpulses were clearly measured with good resolution, where a ratio of the pulses without and with scrapper gives the stripping efficiency. A detail of the present study results are presented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-TUPCF12

Export •

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