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Journal Articles

Studies of high density baryon matter with high intensity heavy-ion beams at J-PARC

Sako, Hiroyuki; Harada, Hiroyuki; Sakaguchi, Takao*; Chujo, Tatsuya*; Esumi, Shinichi*; Gunji, Taku*; Hasegawa, Shoichi; Hwang, S.; Ichikawa, Yudai; Imai, Kenichi; et al.

Nuclear Physics A, 956, p.850 - 853, 2016/12

 Times Cited Count:11 Percentile:71(Physics, Nuclear)

Journal Articles

Highly efficient extraction separation of lanthanides using a diglycolamic acid extractant

Shimojo, Kojiro; Aoyagi, Noboru; Saito, Takumi*; Okamura, Hiroyuki; Kubota, Fukiko*; Goto, Masahiro*; Naganawa, Hirochika

Analytical Sciences, 30(2), p.263 - 269, 2014/02

 Times Cited Count:40 Percentile:86.31(Chemistry, Analytical)

Journal Articles

Time structure of an accelerated beam using a ratio-frequency quadrupole linac with direct plasma injection scheme

Kashiwagi, Hirotsugu; Okamura, Masahiro*; Jameson, R. A.*; Hattori, Toshiyuki*; Hayashizaki, Noriyosu*

Review of Scientific Instruments, 81(2), p.02B724_1 - 02B724_4, 2010/02

 Times Cited Count:2 Percentile:14.37(Instruments & Instrumentation)

Journal Articles

Direct plasma injection scheme with beam extraction in a radio frequency quadrupole linac cavity

Kashiwagi, Hirotsugu; Okamura, Masahiro*; Tamura, Jun*; Takano, Jumpei*

Review of Scientific Instruments, 79(2), p.02C716_1 - 02C716_4, 2008/02

no abstracts in English

Journal Articles

Simulation of beam injection by direct plasma injection scheme with beam extraction in an RFQ linac cavity

Kashiwagi, Hirotsugu; Okamura, Masahiro*; Tamura, Jun*; Kanesue, Takeshi*

Proceedings of 5th Annual Meeting of Particle Accelerator Society of Japan and 33rd Linear Accelerator Meeting in Japan (CD-ROM), p.509 - 511, 2008/00

no abstracts in English

Journal Articles

Measurement of RF properties for beam extraction in an RFQ linac

Kashiwagi, Hirotsugu; Okamura, Masahiro*; Tamura, Jun*; Takano, Jumpei*

Proceedings of 4th Annual Meeting of Particle Accelerator Society of Japan and 32nd Linear Accelerator Meeting in Japan (CD-ROM), p.739 - 741, 2007/00

no abstracts in English

Journal Articles

Acceleration of high current fully stripped carbon ion beam by direct injection scheme

Kashiwagi, Hirotsugu; Fukuda, Mitsuhiro; Okamura, Masahiro*; Jameson, R. A.*; Hattori, Toshiyuki*; Hayashizaki, Noriyosu*; Sakakibara, Kazuhiko*; Takano, Jumpei*; Yamamoto, Kazuo*; Iwata, Yoshiyuki*; et al.

Review of Scientific Instruments, 77(3), p.03B305_1 - 03B305_4, 2006/03

 Times Cited Count:12 Percentile:54.47(Instruments & Instrumentation)

Acceleration of a 17mA 100keV/u C$$^{6+}$$ ion beam has been successfully achieved with an RFQ linac by means of "Direct injection scheme". The Direct injection scheme is a new scheme for injecting an ion beam from a laser ion source to the RFQ linac without a low energy beam transport line to avoid a beam loss due to the space charge effect. The high current C$$^{6+}$$ beam is required for single turn injection to a synchrotron to reduce the size of synchrotron magnets. The high current C$$^{6+}$$ beam produced by an ion source with a Nd-YAG laser was injected to the RFQ linac by the Direct injection scheme. It has been proved experimentally that the fully-stripped carbon ion beam with a current more than 10mA can be accelerated by the RFQ linac.

Journal Articles

High current carbon beam production with direct plasma injection scheme

Okamura, Masahiro*; Kashiwagi, Hirotsugu; Sakakibara, Kazuhiko*; Takano, Jumpei*; Hattori, Toshiyuki*; Hayashizaki, Noriyosu*; Jameson, R. A.*; Yamamoto, Kazuo*

Review of Scientific Instruments, 77(3), p.03B303_1 - 03B303_3, 2006/03

 Times Cited Count:10 Percentile:49.28(Instruments & Instrumentation)

We have been studying a new heavy-ion production technique called "direct plasma injection scheme", DPIS, since 2000. A new radio frequency quadrupole "RFQ" designed especially for the DPIS was commissioned in 2004 and very intense carbon beam was successfully obtained, reaching more than 60 mA accelerated current from the RFQ. Most of the contents of the accelerated beam was carbon 4+ as verified by beam analysis.

Journal Articles

Analysis of laser-produced heavy ions for direct plasma injection scheme

Sakakibara, Kazuhiko*; Okamura, Masahiro*; Kondrashev, S.*; Hattori, Toshiyuki*; Kashiwagi, Hirotsugu; Kanesue, Takeshi*

Review of Scientific Instruments, 77(3), p.03B304_1 - 03B304_3, 2006/03

 Times Cited Count:2 Percentile:15.45(Instruments & Instrumentation)

To accelerate highly charged intense ion beam, we have developed the direct plasma injectionscheme DPIS with laser ion source. In this scheme an ion beam from a laser ion source is injecteddirectly to a radio frequency quadrupole RFQ linac without a low energy beam transport LEBT line and then beam losses in the LEBT can be avoided. We achieved high current acceleration ofcarbon ions 60 mA by DPIS with the RFQ specially designed for high current heavy ions. As thenext step we will use heavier elements such as Al, Fe, and Ta as targets in laser ion source usinghigh power laser, for example, glass laser for DPIS and will examine properties of laser-producedplasma for highly charged ion production.

Journal Articles

Study of the beam pulse shape by DPIS for high intensity heavy ion beam acceleration

Kashiwagi, Hirotsugu; Okamura, Masahiro*; Hattori, Toshiyuki*; Jameson, R. A.*; Yamamoto, Kazuo*; Fujimoto, Tetsuya*; Kamiya, Tomihiro

Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.570 - 572, 2006/00

no abstracts in English

Journal Articles

Acceleration of high current and highly charged carbon beam using direct injection scheme

Kashiwagi, Hirotsugu; Okamura, Masahiro*; Jameson, R. A.*; Hattori, Toshiyuki*; Hayashizaki, Noriyosu*; Sakakibara, Kazuhiko*; Takano, Jumpei*; Yamamoto, Kazuo*; Iwata, Yoshiyuki*; Fujimoto, Tetsuya*

Proceedings of 2nd Annual Meeting of Particle Accelerator Society of Japan and 30th Linear Accelerator Meeting in Japan, p.182 - 184, 2005/07

The carbon beam from a Nd-YAG laser ion source was accelerated successfully by an RFQ linac using Direct injection scheme. The "Direct injection scheme" is the way to inject an ion beam to the RFQ linac without a low energy beam transport line to avoid space charge effect due to a high intensity beam from the laser ion source. About 30mA of a carbon beam was detected by a faraday cup just behind the RFQ linac.

Oral presentation

Taste comparison of spices; Radiation sterilization and heating sterilization

Ichikawa, Mariko*; Iizuka, Tomoko*; Chiba, Etsuko*; Okamura, Hiroyuki*; Tabei, Yutaka*; Morita, Maki*; Yokoyama, Tsutomu*; Fukutomi, Fumitake*; Sakagami, Chiharu*; Ukai, Mitsuko*; et al.

no journal, , 

no abstracts in English

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