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Journal Articles

High-power tests of RF input coupler for the IFMIF/EVEDA RFQ prototype linac

Maebara, Sunao; Sukegawa, Keiichi*; Tadano, Shuya*; Kasugai, Atsushi; Suzuki, Hiromitsu; Abe, Kazuhiko*; Oku, Ryuji*; Sugimoto, Masayoshi

Proceedings of 12th Annual Meeting of Particle Accelerator Society of Japan (Internet), p.1140 - 1142, 2015/09

For the IFMIF/EVEDA accelerator prototype RFQ linac, the operation frequency of 175MHz was selected to accelerate a large current of 125mA. The driving RF power of 1.28MW by 8 RF input couplers has to be injected to the RFQ cavity for CW operation mode. For each RF input coupler, nominal RF power of 160kW and maximum transmitted RF power of 200kW are required. For this purpose, an RF input coupler with cooling functions was designed, based on a 6 1/8 inch co-axial waveguide, and the RF coupler was manufactured by way of trial. For the trial RF coupler, high-power tests using a high voltage standing wave on a high-Q load circuit wave were carried out, and a 200kW-14 sec CW operation were performed after four days of RF aging. No RF contact defects, unnecessary low-Q value and extraordinary outgassing were observed. This report describes the high-power tests of the RF input coupler.

Journal Articles

From laboratory to field; ${it OsNRAMP5}$-knockdown rice is a promising candidate for Cd phytoremediation in paddy fields

Takahashi, Ryuichi*; Ishimaru, Yasuhiro*; Shimo, H.*; Bashir, K.*; Senoura, Takeshi*; Sugimoto, Kazuhiko*; Ono, Kazuko*; Suzui, Nobuo; Kawachi, Naoki; Ishii, Satomi; et al.

PLOS ONE (Internet), 9(6), p.e98816_1 - e98816_7, 2014/06

 Times Cited Count:51 Percentile:86.87(Multidisciplinary Sciences)

Journal Articles

Current status of the control system for J-PARC accelerator complex

Yoshikawa, Hiroshi; Sakaki, Hironao; Sako, Hiroyuki; Takahashi, Hiroki; Shen, G.; Kato, Yuko; Ito, Yuichi; Ikeda, Hiroshi*; Ishiyama, Tatsuya*; Tsuchiya, Hitoshi*; et al.

Proceedings of International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS '07) (CD-ROM), p.62 - 64, 2007/10

J-PARC is a large scale facility of the proton accelerators for the multi-purpose of scientific researches in Japan. This facility consists of three accelerators and three experimental stations. Now, J-PARC is under construction, and LINAC is operated for one year, 3GeV synchrotron has just started the commissioning in this October the 1st. The completion of this facility will be next summer. The control system of accelerators established fundamental performance for the initial commissioning. The most important requirement to the control system of this facility is to minimize the activation of accelerator devices. In this paper, we show that the performances of each layer of this control system have been achieved in the initial stage.

Journal Articles

RDB system in J-PARC LINAC and its application to commissioning, 2

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.

Journal Articles

RDB system in J-PARC LINAC and its application to commissioning

Sako, Hiroyuki; Sakaki, Hironao; Takahashi, Hiroki; Yoshikawa, Hiroshi; Ito, Yuichi*; Kato, Yuko*; Kamikubota, Norihiko*; Sugimoto, Makoto*; Watanabe, Kazuhiko*; Ikeda, Hiroshi*; et al.

Proceedings of 2nd Annual Meeting of Particle Accelerator Society of Japan and 30th Linear Accelerator Meeting in Japan, p.462 - 464, 2005/07

Current status of the RDB system in J-PARC LINAC is presented. The machine database records static data of devices and the control system, whereas the operation log database records a history of operation parameters. The overall design of control flow among high-level applications, simulators, and database is described. Then results of a control test of the power supply for DTQ, and a prototype test of the operation log database in MEBT1 test bench at KEK are reported. In the end, a scheme to generate simulation configuration files from RDB is shown.

Journal Articles

Development of user interface for accelerator components database

Watanabe, Kazuhiko*; Yoshikawa, Hiroshi; Sakaki, Hironao; Takahashi, Hiroki; Kawase, Masato*; Sugimoto, Makoto*

Proceedings of 2nd Annual Meeting of Particle Accelerator Society of Japan and 30th Linear Accelerator Meeting in Japan, p.451 - 453, 2005/07

In J-PARC, we manage the accelerator devices data using the relational database. It is used for managing physical value of all devices. We request the database to generate EPICS records, and the managed data must always the latest. Some data is treated by operator who doesn't have enough experience of database input. If they feel the input is difficult, the input of the database stagnates. In the worst case, the database might not be used. This paper reports the database GUI for operator who doesn't have enough experience of database.

Journal Articles

Development of remote control JAVA tool for PLC

Kawase, Masato*; Takahashi, Hiroki; Sakaki, Hironao; Ito, Yuichi*; Sugimoto, Makoto*; Watanabe, Kazuhiko*

Proceedings of 2nd Annual Meeting of Particle Accelerator Society of Japan and 30th Linear Accelerator Meeting in Japan, p.633 - 635, 2005/07

In J-PARC control System, machinery having a network controller(NTC) is operated with EPICS. A NTC can also connect with an upper level computer directly, while in EPICS, an IOC is used for communication between an upper level computer and a NTC. In case of a communication error, one must investigate the source of the error, whether it is due to the NTC. It becomes very effective if one can switch the connection method between EPICS and direct connection on an operation screen. We report on a development of a tool realizing such functionalities.

Journal Articles

Summary of 3GeVRCS control system, 2

Takahashi, Hiroki; Sakaki, Hironao; Sako, Hiroyuki; Yoshikawa, Hiroshi; Ito, Yuichi*; Kato, Yuko*; Kawase, Masato*; Sugimoto, Makoto*; Watanabe, Kazuhiko*

Proceedings of 2nd Annual Meeting of Particle Accelerator Society of Japan and 30th Linear Accelerator Meeting in Japan, p.531 - 533, 2005/07

J-PARC 3GeV RCS send the beam of a different parameter to both the institutions of MLF and MR. Therefore, 3GeV RCS Control System is required unprecedented capability to supervise correctly by distinguishing the beam for MLF and MR. Following the status report last year, this report shows the status of 3GeV RCS Control System focusing on Data Acquisition system which is able to collect the synchronized data and Based Data Management system which become the basis for 3GeV RCS Control System.

Journal Articles

Mechanical strength of alumina ceramics in low temperatures

Sugimoto, Makoto; Takano, Katsutoshi*; Tsuji, Hiroshi; Abe, Kazuhiko*; *; *

Teion Kogaku, 33(11), p.716 - 723, 1998/00

no abstracts in English

Oral presentation

Characterization of ${it OsNRAMP5}$ knockdown rice plants using high cadmium accumulating cultivar

Takahashi, Ryuichi*; Bashir, K.*; Ishimaru, Yasuhiro*; Senoura, Takeshi*; Sugimoto, Kazuhiko*; Ono, Kazuko*; Yano, Masahiro*; Suzui, Nobuo; Fujimaki, Shu; Nishizawa, Naoko*; et al.

no journal, , 

no abstracts in English

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