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Journal Articles

Preliminary measurements on single and multi-crystal diamond electron cathodes

Minehara, Eisuke

Proceedings of 2nd Annual Meeting of Particle Accelerator Society of Japan and 30th Linear Accelerator Meeting in Japan, p.55 - 56, 2005/07

The next generation high brightness and high current electron source like a photo cathode, a thermionic cathode, a crystal Diamond electron cathode and others would be expected to realize the next generation ERL (energy recovery linac) based light source and SASE X-ray free-electron laser. The JAERI FEL group has recently started to develop a new crystal Diamond electron cathode technology for high current, high brightness, and long life electron source. In the presentation, we plan to explain and to discuss our strategy and a preliminary experimental measurements of the crystal Diamond cathode, and related Diamond cathode evaluation system.

JAEA Reports

Proceedings of 6th Symposium on Advanced Photon Research; November 4th-5th, 2004, Kizu, Japan

Kansai Research Establishment

JAERI-Conf 2005-004, 243 Pages, 2005/06

JAERI-Conf-2005-004.pdf:16.74MB

This report consists of 55 contributed papers of the 6th Symposium on Advanced Photon Research, which was held at JAERI-Kansai in Kyoto on November 4-5, 2004. The numbers of speeches were 16, including 5 invited speeches and the numbers of poster presentations were 56, including the report of presentations and cooperative research and joint research performed in FY2003.

Journal Articles

Large-scaled non-thermal laser peeling, cutting and drilling in nuclear decommissioning industry

Minehara, Eisuke; Hajima, Ryoichi; Sawamura, Masaru; Nagai, Ryoji; Kikuzawa, Nobuhiro; Nishimori, Nobuyuki; Iijima, Hokuto; Nishitani, Tomohiro; Kimura, Hideaki*; Oguri, Daiichiro*; et al.

Proceedings of 13th International Conference on Nuclear Engineering (ICONE-13) (CD-ROM), 10 Pages, 2005/05

The JAERI FEL has recently discovered the new FEL lasing of 255fs ultra fast pulse, 6-9% high-efficiency, one gigawatt high peak power, a few kilowatts average power, and wide tunability of medium and far infrared wavelength regions at the same time. Using the new lasing and energy-recovery linac technology, we could extend a more powerful and more efficient free-electron laser (FEL) than 10kW and 25%, respectively, for nuclear industry, pharmacy, medical, defense, shipbuilding, semiconductor industry, chemical industries, environmental sciences, space-debris, power beaming and so on. In order to realize such a tunable, highly-efficient, high average power, high peak power and ultra-short pulse FEL, we need the efficient and powerful FEL driven by the JAERI compact, stand-alone and zero boil-off super-conducting RF linac with an energy-recovery geometry. Our discussions on the FEL will cover the application of non-thermal peeling, cutting, and drilling to decommission the nuclear power plants, and to prevent stress-corrosion cracking in nuclear industry and roadmap for the industrial FELs, the JAERI compact, stand-alone and zero-boil-off cryostat concept and operational experience, the new, highly-efficient, high-power, and ultra fast pulse lasing mode, and the energy-recovery geometry.

JAEA Reports

Proceedings of the 5th Symposium on Advanced Photon Research; November 20th-21st, 2003, Kizu, Japan

Kansai Research Establishment

JAERI-Conf 2004-009, 285 Pages, 2004/06

JAERI-Conf-2004-009.pdf:21.5MB

no abstracts in English

Journal Articles

Current status of the JAERI superconducting RF linac-based free-electron laser

Minehara, Eisuke; Hajima, Ryoichi; Sawamura, Masaru; Nagai, Ryoji; Kikuzawa, Nobuhiro; Nishimori, Nobuyuki

Proceedings of 28th Linear Accelerator Meeting in Japan, p.31 - 32, 2003/08

Current status of the JAERI superconducting RF linac driven free-electron laser has been reported to describe some details of the FEL device and application researches. In the presentation, several progresses and achievements itimized below have been reproted briefly. Firstly a semi-perpetual, non-stop and continous operation of the JAERI cryogenic and refrigeration system is only available in the world for the JAERI superconducting linac-based FEL. Secondly a conceptual design and each vital component of the ERL(energy recovery linac) light souce has recently been developed and progressed quickly as the next-generation light source. Thirdly,large-scaled industrial applications have been briefly reported here.

Journal Articles

Development of the large-scale fine and non-thermal manufacturing technology using femtosecond, highly- efficient, and high power free-electron laser

Minehara, Eisuke

Proceedings of 28th Linear Accelerator Meeting in Japan, p.402 - 403, 2003/08

The JAERI superconducting RF linac-based free-electron laser has successfully generated 6% highly-efficient, a few hundreds of femtosecond, and several kW class high power FEL light several years ago. In the presentation, it will be reprted that the JAERI plans to develop the higher power free-electron lasers and their application to large-scale non-thermal precision manufacturing technology.

JAEA Reports

Journal Articles

Medical free-electron lasers

Minehara, Eisuke

Hoshasen To Sentan Iryo Gijutsu, p.135 - 142, 2003/06

Medical applications of Free-Electron Lasers(FELs), especially the FEL driven by a superconducting rf linac, look very promising because of the compactness, high efficiency, high power capability, tunability, ultra-short pulse width and so on. Here, the linac-based FEL is explained briefly and discussed all about the remarkable features and the road maps near future. Finally, some possible and usable applications of the FELs will be introduced and discussed in the relationship with the features above.

JAEA Reports

Journal Articles

Highly efficient and high-power industrial FELs driven by a compact, stand-alone and zero-boil-off superconducting rf Linac

Minehara, Eisuke

Nuclear Instruments and Methods in Physics Research A, 483(1-2), p.8 - 13, 2002/05

 Times Cited Count:21 Percentile:20.66(Instruments & Instrumentation)

In order to realize a tunable, highly-efficient, high average power, high peak power and ultra-short pulse free-electron laser(FEL) as a supertool [1]of the 21st for all , the JAERI FEL group and I have developed an industrial FEL driven by a compact, stand-alone and zero-boil-off super-conducting rf linac[2] with an energy-recovery geometry as a conceptual design. Our discussions on the supertool will cover market-requirements for the industrial FELs, some answers from the JAERI compact, stand-alone and zero-boil-off cryostat concept and operational experience over these 8 years, our discovery of the new, highly-efficient, high-power, and ultra-short pulse lasing mode[3], and the energy-recovery geometry.

JAEA Reports

Proceedings of the 2nd Symposium on Advanced Photon Research; November 9-10, 2000, Advanced Photon Research Center, Kyoto, Japan

Kansai Research Establishment

JAERI-Conf 2001-011, 334 Pages, 2001/10

JAERI-Conf-2001-011.pdf:27.01MB

This report consists of 83 contributed papers of the Second Symposium on Advanced Photon Research, which was held at JAERI Advanced Photon Research Center in Kyoto on November 9-10, 2000. The numbers of oral presentations including special invited talks and poster presentations were 22 and 73, respectively.

Journal Articles

The JAERI free-electron laser driven by a superconducting rf Linac towards ultra-short pulse, highly-efficient, high power, and tunable coherent light sources

Minehara, Eisuke

Hoshako, 14(3), p.182 - 189, 2001/06

We would like to explain reccent developments and future plans of the JAERI(Japan Atomic Energy Research Institute) free-electron lasers driven by a superconducting rf linac with an energy recovery loop. In the beginning of February 2000, we could exceed our 1-kW design goal and finally reach 2.34kW in quasi-continuous wave(CW) operation with a very high extraction efficiency of 5 percent or more. The high power and highly-efficient lasing has recently been found to be a novel one, a few cycle lasing of 250fs, and about 1 GW peak at the perfect synchronism without lethargy.

Journal Articles

JAERI superconducting RF linac-based free-electron laser-facility

Minehara, Eisuke; Sawamura, Masaru; Nagai, Ryoji; Kikuzawa, Nobuhiro; Sugimoto, Masayoshi; Hajima, Ryoichi; Shizuma, Toshiyuki; Yamauchi, Toshihiko; Nishimori, Nobuyuki

Nuclear Instruments and Methods in Physics Research A, 445(1-3), p.183 - 186, 2000/05

 Times Cited Count:17 Percentile:25.93(Instruments & Instrumentation)

no abstracts in English

JAEA Reports

Journal Articles

Detailed magnetic field measurement on a hybrid undulator for the JAERI FEL

Nagai, Ryoji; Minehara, Eisuke; Sasaki, Shigemi; Sawamura, Masaru; Sugimoto, Masayoshi; Takao, Masaru*; ; Okubo, Makio; Suzuki, Yasuo; *; et al.

Journal of Nuclear Science and Technology, 32(8), p.715 - 718, 1995/08

 Times Cited Count:1 Percentile:81.73(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Beam orbit analysis in a wiggler by using a noncanonical perturbation method

Kishimoto, Yasuaki; Tokuda, Shinji; Sakamoto, Keishi

Physics of Plasmas, 2(4), p.1316 - 1325, 1995/04

 Times Cited Count:5 Percentile:70.56(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Status of the JAERI free electron laser facility driven by a super conducting rf linac

Minehara, Eisuke; Nagai, Ryoji; Sawamura, Masaru; Takao, Masaru*; Sugimoto, Masayoshi; Sasaki, Shigemi; Okubo, Makio; Kikuzawa, Nobuhiro; *; Suzuki, Yasuo; et al.

Nuclear Instruments and Methods in Physics Research A, 358, p.ABS30 - ABS31, 1995/00

 Times Cited Count:0 Percentile:100(Instruments & Instrumentation)

no abstracts in English

32 (Records 1-20 displayed on this page)