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Takahashi, Hiroki; Kawase, Masato; Sakaki, Hironao; Yoshikawa, Hiroshi; Ishiyama, Tatsuya*; Ito, Yuichi; Kato, Yuko; Sugimoto, Makoto*; Suzuki, Takahiro*
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.442 - 444, 2006/08
no abstracts in English
Nishitani, Tomohiro; Tabuchi, Masao*; Noritake, Yosuke*; Hayashitani, Haruhiko*; Hajima, Ryoichi; Iijima, Hokuto; Nagai, Ryoji; Sawamura, Masaru; Kikuzawa, Nobuhiro; Nishimori, Nobuyuki; et al.
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.45 - 47, 2006/00
no abstracts in English
Okawa, Tomohiro; Ao, Hiroyuki; Ikegami, Masanori*
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.355 - 357, 2006/00
L3BT is a beam transport line from J-PARC (Japan Proton Accelerator Research Complex) linac to the succeeding 3-GeV RCS (Rapid Cycling Synchrotron). The construction of the L3BT has been almost finished. The beam commissioning of the L3BT will be started soon. On the other hand we have performed 3D particle simulations with IMPACT to evaluate the performance of the halo scraping and beam loss in the scraper section and beam dump line. In this paper, results of the beam simulation of the L3BT are presented. The construction status of the L3BT is also presented in brief.
Iijima, Hokuto; Nishitani, Tomohiro; Nagai, Ryoji; Hajima, Ryoichi; Minehara, Eisuke
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.529 - 531, 2006/00
no abstracts in English
Sawamura, Masaru
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.832 - 834, 2006/00
no abstracts in English
Arakawa, Kazuo
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.85 - 89, 2006/00
no abstracts in English
-A type low-level RF controllerNagai, Ryoji; Sawamura, Masaru; Hajima, Ryoichi; Nishimori, Nobuyuki; Kikuzawa, Nobuhiro; Iijima, Hokuto; Nishitani, Tomohiro; Minehara, Eisuke
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.838 - 840, 2006/00
no abstracts in English
Tamura, Fumihiko; Schnase, A.; Nomura, Masahiro; Yamamoto, Masanobu; Hasegawa, Katsushi; Yoshii, Masahito*; Omori, Chihiro*; Hara, Keigo*; Toda, Makoto*; Takagi, Akira*; et al.
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.460 - 462, 2006/00
The beam in the J-PARC RCS has to be extracted with the proper timingand phase to the MR (main ring) and the neutron target in the MLF (material and life science facility). The neutron beamfrom the neutron target is led to the group of spectrometers, such asthe fermi chopper. The choppers and the beam must be precisely synchronized to achieve high energy resolution. Also, the MR injection requires the proper RF bucket selection andprecise beam phase control to avoid the longitudinal dipole oscillations. In this presentation we describe the requirements of the beamsynchronization, the operational principle, and the newly developedmodules for the synchronization.
Sakaki, Hironao; Takahashi, Hiroki; Ishiyama, Tatsuya*; Kawase, Masato; Sako, Hiroyuki; Kato, Yuko; Ito, Yuichi; Yoshikawa, Hiroshi; Ueda, Shinji*; Suzuki, Takahiro*
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.367 - 369, 2006/00
This paper reports Personnel Interlock System, Machine Protection System, and other Interlock System in J-PARC LINAC. The noise measures is important in MPS, we describe the noise decreasing method. The number of accelerating particles in J-PARC LINAC that can be accelerated has been deciding by ministry's guideline. Therefore, it is necessary to do severe surveillance. Here we also explain this particle monitoring instrument.
Iijima, Hokuto; Nagai, Ryoji; Hajima, Ryoichi; Minehara, Eisuke
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.738 - 740, 2006/00
no abstracts in English
Okumura, Susumu; Kurashima, Satoshi; Miyawaki, Nobumasa; Kashiwagi, Hirotsugu; Yoshida, Kenichi; Ishibori, Ikuo; Yuri, Yosuke; Nara, Takayuki; Agematsu, Takashi
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.919 - 921, 2006/00
no abstracts in English
Morishita, Takatoshi; Asano, Hiroyuki; Ito, Takashi; Ikegami, Masanori*; Takasaki, Eiichi*; Tanaka, Hirokazu*; Naito, Fujio*; Yoshino, Kazuo*
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.376 - 378, 2006/00
In the J-PARC Linac, the DTL and the SDTL have been installed. A precise alignment of accelerator components is essential for high quality beam acceleration. Due to the heavy wiring for DTQs, the realignment of DTL cavity requires a long term. Then the DTL/SDTL and the focusing magnets are aligned precisely enough for the beam operation at the installation. The DTL/SDTL alignment accuracy satisfied the requirement, which confirmed by the laser tracker measurement. The floor level of the accelerator tunnel has been measured periodically. The long term motion of accelerator tunnel is quantitatively evaluated since Feb. 2005.
Miyawaki, Nobumasa; Okumura, Susumu; Kurashima, Satoshi; Kashiwagi, Hirotsugu; Yoshida, Kenichi; Ishibori, Ikuo; Yuri, Yosuke; Nara, Takayuki; Agematsu, Takashi; Fukuda, Mitsuhiro*
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.907 - 909, 2006/00
The central region of the JAEA AVF cyclotron has been modified to solve the problem of the beam instability caused by the electric discharge between the dee electrode and the RF shielding cover attached to the inflector electrode and to control a beam phase width for microbeam production. The beam stability has been improved by separating the inflector electrode and its RF shielding cover. The beam phase width, controlled with phase slits, has been 4.5 rf degrees FW for acceleration harmonic mode 1 (H=1) and 3.6 rf degrees FW for H=2 to fulfil the requirement for the microbeam production.
Sako, Hiroyuki; Sakaki, Hironao; Takahashi, Hiroki; Yoshikawa, Hiroshi; Ito, Yuichi; Kato, Yuko; Kawase, Masato; Shen, G.; Kiyomichi, Akio; Kamikubota, Norihiko*; et al.
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.373 - 375, 2006/00
A Relational database (RDB) system, which is the core of the J-PARC Linac control system, has been developed. The beam commissioning of Linac is planned to start in December 2006. The RDB sytem consists of the following databases; "DB1", which records basic device parameters, "DB2", which acquires online EPICS data, "Operation Log DB", which records a history of operating parameters, and "Commissioning DB", which holds information on geometry of devices and commissioning. We report on the development status of each DB as well as status of the unified commissioning environment software which utilizes these databases.
Nagai, Ryoji; Iijima, Hokuto; Nishitani, Tomohiro; Hajima, Ryoichi; Nishimori, Nobuyuki; Sawamura, Masaru; Kikuzawa, Nobuhiro; Minehara, Eisuke
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.559 - 561, 2006/00
no abstracts in English
Kondo, Yasuhiro; Ueno, Akira; Hasegawa, Kazuo
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.388 - 390, 2006/00
no abstracts in English
Sato, Kenichiro; Lee, S.*; Toyama, Takeshi*; Hayashi, Naoki
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.115 - 117, 2006/00
3 GeV Rapid Cycling Synchrotron and 50 GeV Main Ring Synchrotron in J-PARC, which is under construction, are expected to accelerate high power proton beam of 1 MW and 0.75 MW class, respectively. To measure such a high intensity beam profile, we have been developing Residual Gas Ionization Profile Monitors (IPMs). To confirm the reliability of this type monitors, we constructed a prototype and installed in Main Ring of Proton Synchrotron at KEK and tested using proton beams for two different operation modes, that is ion and electron collection mode using magnetic guiding field. The obtained data are used to discuss the detection reliability of the real ones.
Sato, Susumu; Igarashi, Zenei*; Akikawa, Hisashi*; Tomisawa, Tetsuo; Lee, S.*; Ueno, Akira; Ikegami, Masanori*; Ao, Hiroyuki
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.127 - 129, 2006/00
In J-PARC LINAC section, several types of beam position monitors (BPMs) from 37.7 mm to 120 mm in diameter are allocated. In this paper, background of design and key points for a larger diameter (180 mm) of BPM are reported.
Nagai, Ryoji; Hajima, Ryoichi; Nishimori, Nobuyuki; Sawamura, Masaru; Kikuzawa, Nobuhiro; Iijima, Hokuto; Nishitani, Tomohiro; Minehara, Eisuke
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.514 - 516, 2006/00
no abstracts in English
Kikuzawa, Nobuhiro
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.768 - 770, 2006/00
no abstracts in English