Development of a laser-plasma ion source at the advanced photon research center

Daido, Hiroyuki; Yamakawa, Koichi; Yamagiwa, Mitsuru; Arisawa, Takashi; Kato, Yoshiaki; Noda, Akira*; Uesaka, Mitsuru*; Ogata, Atsushi*; Matsukado, Koji*

Proceedings of 4th Symposium on Accelerator and Related Technology for Application, p.111 - 112, 2001/10

no abstracts in English

Comparison between JAERI FEL and other high power FELs

Nishimori, Nobuyuki; Hajima, Ryoichi; Nagai, Ryoji

Proceedings of 25th Linear Accelerator Meeting in Japan, p.374 - 376, 2000/07

no abstracts in English

A Design study of high electric power for fast reactor cooled by super critical light water

Koshizuka, Seiichi*

JNC-TJ9400 2000-011, 102 Pages, 2000/03

JNC-TJ9400-2000-011.pdf:2.71MB

In order to evaluate the possibility to achieve high electric power by a fast reactor with supercritical light water, the design study was carried out on a large fast reactor core with high coolant outlet temperature (SCFR-H). Since the reactor coolant circuit uses once-through direct cycle where all feedwater flows through the core to the turbine at supercritical pressure, it is possible to design much simpler and more compact reactor systems and to achieve higher thermal efficiency than those of current light water reactors. The once-through direct cycle system is employed in current fossil-fired power plants. In the present study, three types of core were designed. The first is SCFR-H with blankets cooled by ascending flow, the second is SCFR-H with blankets cooled by descending flow and the third is SCFR-H with high thermal power. Every core was designed to achieve the thermal efficiency over 43%, positive coolant density reactivity coefficient and electric power over 1600MW. Core characteristics of SCFR-Hs were compared with those of SCLWR-H (electric power: 1212MW), which is a thermal neutron spectrum reactor cooled and moderated by supercritical light water, with the same diameter of the reactor pressure vessel. It was shown that SCFR-H could increase the electric power about l.7 times maximally. From the standpoint of the increase of a reactor thermal power, a fast reactor has advantages as compared with a thermal neutron reactor, because it can increase the power density by adopting tight fuel lattices and eliminating the moderator region. Thus, it was concluded that a reactor cooled by supercritical light water could further improve the cost competitiveness by using a fast neutron spectrum and achieving a higher thermal power.

Design and performance of the JAERI superconducting linac for high-power free electron laser

Sawamura, Masaru; Nagai, Ryoji; Kikuzawa, Nobuhiro; Sugimoto, Masayoshi; Nishimori, Nobuyuki; Minehara, Eisuke

Review of Scientific Instruments, 70(10), p.3865 - 3868, 1999/00

https://doi.org/10.1063/1.1150002

no abstracts in English

The Scope and present status of JAERI "Advanced photon research" program

Takuma, Hiroshi

Proceedings of 1st International Conference on Superstrong Fields in Plasmas, p.509 - 515, 1997/00

no abstracts in English

Present status of design study for the positron factory

Okada, Sohei; Kaneko, Hirohisa; Sunaga, Hiromi; Takizawa, Haruki; Yotsumoto, Keiichi

Proc. of the 1994 Int. Linac Conf., Vol. 2, 0, p.570 - 572, 1994/00

no abstracts in English

Design of a CW high beam powerelectron linac

PNC-TN9410 92-039, 26 Pages, 1992/02

PNC-TN9410-92-039.pdf:0.63MB

A test CW electron linac is designed to develop a high power accelerator to treat waste radioactive material. The linac is to be operated at the room temperature and is energized by two 1.2MW CW L-band klystrons to produce an electron beam with the energy of 10MeV and current of 100mA. The average beam power is 200KW-1MW for the duty factor 20%-100%. In designing such high power electron linear accelerator, an accelerating section having a traveling wave resonant ring is adopted. By adopting such type of acceleration section, it became possible to choose very short length of the accelerator sections to elevate the threshold current of beam break-up (BBU) keeping the high accelerator efficiency. In designing the linac with the traveling wave resonant ring, some special considerations and calculations are introduced. The variational method is used to calculate the sizes and parameters of the disk-loaded accelerator structure. There is the discrepancy of the order of a few hundredth of one percent between the calculated frequency and the experimental one. A kind of internal cooling water structure is adopted to disperse the generated heat by RF efficiently. Currently, its components development is in progress at OEC.

Preliminary investigation on the target system of a high-power electron linac for positron factory

Okada, Sohei; Sunaga, Hiromi

Proc. of the 15th Linear Accelerator Meeting in Japan, p.266 - 269, 1990/00

no abstracts in English

Two-Stage Acceleration of an Ion Beam for High Power Ion Source

Ohara, Yoshihiro

JAERI-M 8357, 89 Pages, 1979/07

JAERI-M-8357.pdf:1.76MB

no abstracts in English

Present status of nuclear fuel engineering;

Nippon Genshiryoku Gakkai-Shi, 9(9), p.555 - 558, 1967/00

no abstracts in English