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Kiriyama, Koji*; Shiwaku, Hideaki; Mochizuki, Tetsuro*; Shobu, Takahisa*; Tozawa, Kazukiyo*
JAERI-Tech 2005-003, 36 Pages, 2005/03
JAERI-Tech-2005-003.pdf:4.19MB
Multi-stabilizing methods for vibrations on the cryogenically cooled monochromator have been tried on BL11XU at SPring-8. Observed vibrations on crystals were mainly 1-10 Hz, 30 Hz, and 50 Hz. The results suggested that sources of the vibrations were liquid nitrogen flow and propagation from vibrations of vacuum pumps equipped with beam line. We took countermeasures of the vibrations to liquid nitrogen tubes, and set parameters (temperature, pressure and flow-late) of the cryogenic cooling system for 1-10 Hz vibration. Vibration absorber was set not to propagate the vibrations from the vacuum pumps and their fans for 30 and 50 Hz vibrations. These methods successfully removed the mechanical vibrations. Then, intensity vibration of X-ray was decreased from 4.47 % to 0.85 %, in the end. The stabilizing methods on BL11XU are expected to apply to the similar system at the other beam-lines.
Shiwaku, Hideaki; Mitsui, Takaya; Tozawa, Kazukiyo*; Kiriyama, Koji*; Harami, Taikan; Mochizuki, Tetsuro*
AIP Conference Proceedings 705, p.659 - 662, 2004/00
We developed a multi-crystal switching system on a cryogenically cooled monochromator of JAERI materials science beamline, BL11XU. In order to study our science, it is necessary for ensuring at least the energy range of 6 - 70keV to employ Si(111) and Si(311) crystals. The principle of the crystal switching is that, two pair of crystals is arranged side by side, and they are translated in horizontal direction for exchanging. Indium sheets were inserted between both sides of crystals in order to improve thermal contact. Some adjustment stages of the monochromator were removed to avoid the crystal vibration and a sheet heater was installed on an X-axis stage to prevent over-cooling of X-axis stages. The monochromator is under commissioning at present. In comparison with a previous indirect water cooling diamond (111) crystal monochromator, this monochromator provides high flux intensity from 4 times to 7 times. It takes only 5 minutes to exchange and adjust crystals geometry. This mechanism will be easily applied to other crystals, for example asymmetrical-cut crystals.
Sakata, Osami*; Furukawa, Yukito*; Goto, Shunji*; Mochizuki, Tetsuro*; Uruga, Tomoya*; Takeshita, Kunikazu*; Ohashi, Haruhiko*; Ohata, Toru*; Matsushita, Tomohiro*; Takahashi, Sunao*; et al.
Surface Review and Letters, 10(2&3), p.543 - 547, 2003/04
Times Cited Count：143 Percentile：96.31(Chemistry, Physical)The main components of a new beamline for surface and interface crystal structure determination at SPring-8 are briefly described. Stages for the beamline monochromator are modified for making an incident X-ray intensity more stable for surface X-ray experiments. Absolute photon flux densities were measured with an incident photon energy. A new ultrahigh vacuum system is introduced with preliminary X-ray measurements from an ordered oxygen on Pt(111) surface.
Yamazaki, H.*; Yabashi, Makina*; Tamasaku, Kenji*; Yoneda, Yasuhiro; Goto, Shunji*; Mochizuki, Tetsuro*; Ishikawa, Tetsuya*
Nuclear Instruments and Methods in Physics Research A, 467-468(Part1), p.643 - 646, 2001/07
Times Cited Count：8 Percentile：51.84(Instruments & Instrumentation)no abstracts in English
Wada, Ken*; Mochizuki, Izumi*; Hyodo, Toshio*; Kosuge, Takashi*; Saito, Yuki*; Shidara, Tetsuo*; Osawa, Satoshi*; Ikeda, Mitsuo*; Shirakawa, Akihiro*; Furukawa, Kazuro*; et al.
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no abstracts in English
Wada, Ken*; Mochizuki, Izumi*; Hyodo, Toshio*; Kosuge, Takashi*; Saito, Yuki*; Nigorikawa, Kazuyuki*; Shidara, Tetsuo*; Osawa, Satoshi*; Ikeda, Mitsuo*; Shirakawa, Akihiro*; et al.
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Wada, Ken*; Mochizuki, Izumi*; Hyodo, Toshio*; Kosuge, Takashi*; Saito, Yuki*; Nigorikawa, Kazuyuki*; Shidara, Tetsuo*; Osawa, Satoshi*; Ikeda, Mitsuo*; Shirakawa, Akihiro*; et al.
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no abstracts in English
Wada, Ken*; Mochizuki, Izumi*; Hyodo, Toshio*; Kosuge, Takashi*; Saito, Yuki*; Nigorikawa, Kazuyuki*; Shidara, Tetsuo*; Osawa, Satoshi*; Ikeda, Mitsuo*; Shirakawa, Akihiro*; et al.
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no abstracts in English
Kiriyama, Koji; Shiwaku, Hideaki; Mochizuki, Tetsuro*; Shobu, Takahisa; Tozawa, Kazukiyo*
no journal, ,
Oscillating inhibition methods for mechanical vibrations on the cryogenically-cooled Si monochromator have been developed on BL11XU at SPring-8. The intensity fluctuation of the X-rays of the monochromator was observed. So, we need to identify the vibration sources and take countermeasures against the vibrations to keep quality of X-rays. In this study, the intensity fluctuation of the X-rays, vibrations larger than 1 Hz on the X-rays and the crystals was measured thoroughly. Without the oscillating inhibition methods, observed intensity fluctuation of X-rays was irregular in several minutes and uneven every second. Measured vibration frequencies were mainly 1
10 Hz, 20 Hz, 55 Hz on X-rays, and were mainly 110 Hz, 30 Hz, and 50 Hz on crystals. The countermeasures were found to be dramatically effective to restrain on the vibrations. As a result, the width of the intensity fluctuation with time decreased from 2.86 percent to 1.46 percent (std. deviation: 0.008302 to 0.004479) that means improving the stability of X-rays from monochromator. The oscillating inhibition methods in the present study on BL11XU at SPring-8 can be applied to the similar monochromator at the other beamlines.
Wada, Ken*; Mochizuki, Izumi*; Hyodo, Toshio*; Kosuge, Takashi*; Saito, Yuki*; Shidara, Tetsuo*; Osawa, Satoshi*; Ikeda, Mitsuo*; Shirakawa, Akihiro*; Furukawa, Kazuro*; et al.
no journal, ,
no abstracts in English
Hyodo, Toshio*; Fukaya, Yuki; Takahashi, Toshio*; Fujinami, Masanori*; Wada, Ken*; Mochizuki, Izumi*; Shidara, Tetsuo*; Kawasuso, Atsuo; Maekawa, Masaki; Shirasawa, Tetsuro*
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no abstracts in English
