... Corresponding author, Tel. +81-298-64-5490, Fax. +81-298-64 -1993, E-mail: toshiya.sanami@ ke... more ... Corresponding author, Tel. +81-298-64-5490, Fax. +81-298-64 -1993, E-mail: toshiya.sanami@ kek.jp II. ... Meth., A376, 208 (1996). 9) T. Murakami, J. Kasagi, H. Tachibanaki, K. Yoshida, Y. Shi-bata, T. Nakagawa, M. Ogihara, SM Lee, T. Kubo and T. Mo-tobayashi, Nucl. ...
On April 2015, the J-PARC E56 (JSNS2: J-PARC Sterile Neutrino Search using neutrinos from J-PARC ... more On April 2015, the J-PARC E56 (JSNS2: J-PARC Sterile Neutrino Search using neutrinos from J-PARC Spallation Neutron Source) experiment officially obtained stage-1 approval from J-PARC. We have since started to perform liquid scintillator R&D for improving energy resolution and fast neutron rejection. Also, we are studying Avalanche Photo-Diodes (SiPM) inside the liquid scintillator. In addition to the R&D work, a background measurement for the proton beam bunch timing using a small liquid scintillator volume was planned, and the safety discussions for the measurement have been done. This report describes the status of the R&D work and the background measurements, in addition to the milestones required before stage-2 approval.
Transverse beam halo is one of the most important beam parameters because it limits the performan... more Transverse beam halo is one of the most important beam parameters because it limits the performance of a high intensity beam accelerator. Therefore in the J-PARC 3-GeV RCA, transverse beam halo measurements are required to increase the output beam power. Transverse halo monitors, which are horizontal and vertical scanning aluminium plats type, have been installed in the extraction beam line. But the residual free electrons hindered the beam halo diagnostic. Thus we combine the several devices and methods to measure the beam halo components. And then various new transverse beam halo monitors are developed to measure the beam halo more clearly.
Double differential cross sections of charged-particles emitted in the p+ 12 C reaction were meas... more Double differential cross sections of charged-particles emitted in the p+ 12 C reaction were measured in the energy region from 14 to 26 MeV. The observed continuous components of emitted protons and α-particles were analyzed by assuming sequential decay of intermediate reaction products and/or simultaneous breakup process. It was found that the three body simultaneous decay, p+α+ 8 Be, and the sequential decay via p+ 12 C* 3-and α+ 9 B g.s. are most important in the proton-induced breakup of 12 C for energies up to 30 MeV.
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2001
ABSTRACT We have developed a high-energy particle transport code NMTC/JAM, which is an upgraded v... more ABSTRACT We have developed a high-energy particle transport code NMTC/JAM, which is an upgraded version of NMTC/JAERI97. The applicable energy range of NMTC/JAM is extended in principle up to 200 GeV for nucleons and mesons by introducing the high-energy nuclear reaction code JAM for the intra-nuclear cascade part. We compare the calculations by NMTC/JAM code with the experimental data of thin and thick targets for proton-induced reactions up to several tens of GeV. The results of the NMTC/JAM code show excellent agreement with the experimental data.
... Corresponding author, Tel. +81-298-64-5490, Fax. +81-298-64 -1993, E-mail: toshiya.sanami@ ke... more ... Corresponding author, Tel. +81-298-64-5490, Fax. +81-298-64 -1993, E-mail: toshiya.sanami@ kek.jp II. ... Meth., A376, 208 (1996). 9) T. Murakami, J. Kasagi, H. Tachibanaki, K. Yoshida, Y. Shi-bata, T. Nakagawa, M. Ogihara, SM Lee, T. Kubo and T. Mo-tobayashi, Nucl. ...
On April 2015, the J-PARC E56 (JSNS2: J-PARC Sterile Neutrino Search using neutrinos from J-PARC ... more On April 2015, the J-PARC E56 (JSNS2: J-PARC Sterile Neutrino Search using neutrinos from J-PARC Spallation Neutron Source) experiment officially obtained stage-1 approval from J-PARC. We have since started to perform liquid scintillator R&D for improving energy resolution and fast neutron rejection. Also, we are studying Avalanche Photo-Diodes (SiPM) inside the liquid scintillator. In addition to the R&D work, a background measurement for the proton beam bunch timing using a small liquid scintillator volume was planned, and the safety discussions for the measurement have been done. This report describes the status of the R&D work and the background measurements, in addition to the milestones required before stage-2 approval.
Transverse beam halo is one of the most important beam parameters because it limits the performan... more Transverse beam halo is one of the most important beam parameters because it limits the performance of a high intensity beam accelerator. Therefore in the J-PARC 3-GeV RCA, transverse beam halo measurements are required to increase the output beam power. Transverse halo monitors, which are horizontal and vertical scanning aluminium plats type, have been installed in the extraction beam line. But the residual free electrons hindered the beam halo diagnostic. Thus we combine the several devices and methods to measure the beam halo components. And then various new transverse beam halo monitors are developed to measure the beam halo more clearly.
Double differential cross sections of charged-particles emitted in the p+ 12 C reaction were meas... more Double differential cross sections of charged-particles emitted in the p+ 12 C reaction were measured in the energy region from 14 to 26 MeV. The observed continuous components of emitted protons and α-particles were analyzed by assuming sequential decay of intermediate reaction products and/or simultaneous breakup process. It was found that the three body simultaneous decay, p+α+ 8 Be, and the sequential decay via p+ 12 C* 3-and α+ 9 B g.s. are most important in the proton-induced breakup of 12 C for energies up to 30 MeV.
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2001
ABSTRACT We have developed a high-energy particle transport code NMTC/JAM, which is an upgraded v... more ABSTRACT We have developed a high-energy particle transport code NMTC/JAM, which is an upgraded version of NMTC/JAERI97. The applicable energy range of NMTC/JAM is extended in principle up to 200 GeV for nucleons and mesons by introducing the high-energy nuclear reaction code JAM for the intra-nuclear cascade part. We compare the calculations by NMTC/JAM code with the experimental data of thin and thick targets for proton-induced reactions up to several tens of GeV. The results of the NMTC/JAM code show excellent agreement with the experimental data.
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Papers by Shin-ichiro Meigo