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Shiwaku, Hideaki; Marushita, Motoharu*
JAEA-Research 2022-015, 39 Pages, 2023/05
We designed the hard X-ray undulator beamline BL22XU, which is dedicated to Japan Atomic Energy Research Institute (JAERI) at SPring-8 (now Japan Atomic Energy Agency (JAEA)). BL22XU is used for XAFS (X-ray Absorption Fine Structure) analysis experiments to develop separation and extraction materials for radioactive waste treatment and to elucidate their chemical behavior, magnetic research experiments using a diffractometer, and experiments under extreme conditions using a high-pressure press and a diamond anvil cell. The available X-ray energy range was set from 3 to 70 keV. To design the optics of the beamline, the reflectivity of the mirrors, the diffraction width of the monochromatic crystal, and the absorptance of the Be window were calculated. In addition, ray tracing was performed to optimize the materials for optics, dimensions, and location. The delay time of the ADL (Acoustic Delay Line) was also examined to ensure the safety in the use of radioactive materials. The operation of BL22XU "JAEA Actinide Science I" has already started. By collaborating BL22XU and BL23SU "JAEA Actinide Science II," which uses a soft X-ray undulator as a light source, we solve the problems to promote nuclear sciences. Since the monochromator was upgraded in 2018-2019, initial planning and measured data are documented here again.
Mio, Keigo; Ogiwara, Norio; Marushita, Motoharu*; Arai, Hideyuki*; Goto, Keiichi*
JAEA-Technology 2009-064, 40 Pages, 2010/03
Intense of radiation fields will be expected since large intensity proton beam current of J-PARC 3GeV RCS (Rapid-Cycling Synchrotron). -ray irradiation tests of vacuum system equipment were carried out to evaluate radiation resistance for RCS. Requirement of radiation resistance of vacuum equipment is assumed as 10 MGy. -ray irradiation examination has been done to select the vacuum equipment. As a result, cooling-fan, feed-through-connector, baking heater, piping sealants have been shown to have radiation resistance as 10 MGy. Dry scroll vacuum pump was shown as only 1 MGy from the restriction of the material of the chip seal (Teflon).
Mio, Keigo; Ogiwara, Norio; Hikichi, Yusuke; Marushita, Motoharu*; Arai, Hideyuki*; Goto, Keiichi*; Nishizawa, Daiji*; Furukori, Hisayoshi*
Proceedings of 5th Annual Meeting of Particle Accelerator Society of Japan and 33rd Linear Accelerator Meeting in Japan (CD-ROM), p.252 - 254, 2008/00
-Ray irradiation tests of vacuum system equipment were carried out to evaluate radiation resistance for J-PARC 3GeV RCS(Rapid-Cycling Synchrotron). Intense of radiation fields will be expected since large intensity proton beam current of RCS. Regarding Steady operation and radiation protection, radiation hardness is required approximately 10MGy to 100MGy. Cable, Feed-through-connector, Cooling-fan, Baking heater, piping Sealants have been tested. All the examination objects were evaluated to have radiation hardness at least 10MGy and expected to operate with stability under radiation field of 3GeV RCS.
Marushita, Motoharu*; Mitsui, Takaya; Fukuda, Tatsuo; Takahashi, Masamitsu; Inami, Toshiya; Katayama, Yoshinori; Shiwaku, Hideaki; Mizuki, Junichiro
Nuclear Instruments and Methods in Physics Research A, 467-468(Part.1), p.392 - 395, 2001/07
Times Cited Count:4 Percentile:33.81(Instruments & Instrumentation)no abstracts in English