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JAEA Reports

Study of beam fluctuation of high speed variably-polarizing undulator APPLE-2 in 2001 Dec.-2002 Nov.

Nakatani, Takeshi; Agui, Akane; Yoshigoe, Akitaka; Tanaka, Hitoshi*; Takao, Masaru*; Takeuchi, Masao*; Matsushita, Tomohiro*; Aoyagi, Hideki*

JAERI-Tech 2005-027, 29 Pages, 2005/05

JAERI-Tech-2005-027.pdf:5.14MB

We measured the orbit fluctuation caused by APPLE-2 type undulator (ID23) installed in the SPring-8 storage ring by using the developed real time measurement system of electron and photon beam position monitors. We quantitatively found two characteristic fluctuations correlating with the ID23 motion by wavelet transform which is a kind of frequency analysis. One originates from the variation of error field during the ID drive. The other originates from the stray magnetic field leaked from the servomotors for the phase drive. Using these results, we tried to get rid of the effect of error fields on the beam orbit by the precise feed-forward correction table and the stray field shield. Consequently we succeeded in suppressing the orbit fluctuation down to sub-micron during the gap drive, which is observed by photon beam position monitors installed in downstream 20m from each light source point.

Journal Articles

Direct observation of the Fe substitution effect on the MCD spectra of the dysprosium iron garnet family

Agui, Akane; Mizumaki, Masaichiro*; Matsushita, Tomohiro*; Kawamura, Naomi*; Nakatani, Takeshi

Physica Scripta, T115, p.611 - 613, 2005/00

no abstracts in English

Journal Articles

First observation of natural circular dichroism for biomolecules in soft X-ray region studied with a polarizing undulator

Tanaka, Masahito*; Nakagawa, Kazumichi*; Agui, Akane; Fujii, Kentaro; Yokoya, Akinari

Physica Scripta, T115, p.873 - 876, 2005/00

no abstracts in English

JAEA Reports

Measurement of orbit fluctuation caused by APPLE-2 undulator phase motion and the correction table depending on its phase position

Nakatani, Takeshi; Agui, Akane; Yoshigoe, Akitaka; Matsushita, Tomohiro*; Takao, Masaru*; Takeuchi, Masao*; Aoyagi, Hideki*; Tanaka, Hitoshi*

JAERI-Tech 2004-013, 16 Pages, 2004/12

JAERI-Tech-2004-013.pdf:3.55MB

We observed two characteristic electron orbit fluctuations caused when the phase of ID23 (APPLE-2 type undulator) installed at SPring-8 was driven. One was caused by the variation of magnetic error filed of ID23 when the phase was driven. The other was caused by the noise from the phase drive system which adoped AC servomotors. We measured these orbit fluctuations synchronized with the phase motion using the real-time electron beam position measurement system. The part of the orbit fluctuation was supressed by the correction table which was made referring to the obtained data.

Journal Articles

Real-time observation of initial stage on Si(001) oxidation studied by O-1s photoemission spectroscopy using synchrotron radiation

Yoshigoe, Akitaka; Moritani, Kosuke; Teraoka, Yuden

Japanese Journal of Applied Physics, Part 1, 42(7B), p.4676 - 4679, 2003/07

 Times Cited Count:1 Percentile:5.92(Physics, Applied)

Many studies of the thermal oxidation on Si(001) surface by O$$_{2}$$ gas have been already carried out from both experimental and theoretical methods. The oxidation reaction kinetics have been studied by real time photoemission spectroscopy. Most reports, however, were performed at a fixed electron binding energy. We present the study of initial stage of thermal oxidation on Si(001) surface at the O$$_{2}$$ pressure of 1x10$$^{-4}$$ Pa performed by real time O-1s synchrotron radiation photoemission spectroscopy.All experiments were performed at SUREAC2000 at BL23SU in the SPring-8. The pure O$$_{2}$$ gas of 1x10$$^{-4}$$ Pa was fed into the reaction analysis chember through a variable leak valve. The results of oxygen uptake curves obtained by O-1s peak area intensities at the substrate temperature of 855K and 955K indicate that the Langmuir adsorption model provided the best fitting result for the 855K oxidation, whereas the oxidation at 955K was well explained by the autocatalytic reaction model.

JAEA Reports

Study of closed orbit distortion from high speed phase switching of variably-polarizing undulator APPLE-2 in 2001 March-June

Nakatani, Takeshi; Tanaka, Hitoshi*; Takao, Masaru*; Agui, Akane; Yoshigoe, Akitaka; Takeuchi, Masao*; Aoyagi, Hideki*; Okuma, Haruo*

JAERI-Tech 2003-048, 29 Pages, 2003/05

JAERI-Tech-2003-048.pdf:1.14MB

no abstracts in English

Journal Articles

The 1s-2p resonance photoionization measurement of O$$^{+}$$ ions in comparison with an isoelectronic species Ne$$^{3+}$$

Kawatsura, Kiyoshi*; Yamaoka, Hitoshi*; Oura, Masaki*; Hayaishi, T.*; Sekioka, T.*; Agui, Akane; Yoshigoe, Akitaka; Koike, Fumihiro*

Journal of Physics B; Atomic, Molecular and Optical Physics, 35(20), p.4147 - 4153, 2002/10

 Times Cited Count:21 Percentile:66.85(Optics)

no abstracts in English

JAEA Reports

Highlights of SPring-8 BL23SU in 2001

Agui, Akane; Yoshigoe, Akitaka; Nakatani, Takeshi; Fujii, Kentaro; Yokoya, Akinari

JAERI-Tech 2002-064, 57 Pages, 2002/08

JAERI-Tech-2002-064.pdf:7.47MB

no abstracts in English

Journal Articles

${it Real time}$ observation on oxygen chemisorption states on Si(001)-2$$times$$1 during supersonic oxygen molecular beam irradiation

Yoshigoe, Akitaka; Teraoka, Yuden

Applied Surface Science, 190(1-4), p.60 - 65, 2002/05

 Times Cited Count:10 Percentile:49.22(Chemistry, Physical)

no abstracts in English

Journal Articles

Analysis of the orbit distortion caused by SPring-8 ID23 using the wavelet transformation

Matsushita, Tomohiro*; Agui, Akane; Yoshigoe, Akitaka; Nakatani, Takeshi; Tanaka, Hitoshi*; Takao, Masaru*; Aoyagi, Hideki*; Takeuchi, Masao*

Hoshako, 15(5), p.303 - 307, 2002/05

no abstracts in English

Journal Articles

Operation of circular dichroism measurements with periodic photon-helicity switching by an APPLE-2 type undulator at BL23SU at SPring-8

Agui, Akane; Yoshigoe, Akitaka; Nakatani, Takeshi; Matsushita, Tomohiro*; Saito, Yuji; Mizumaki, Masaichiro*; Yokoya, Akinari; Tanaka, Hitoshi*; Miyahara, Yoshikazu*; Shimada, Taihei; et al.

Hoshako, 14(5), p.339 - 348, 2001/11

no abstracts in English

JAEA Reports

Highlights of SPring-8 BL23SU in 2000

Agui, Akane; Yoshigoe, Akitaka; Nakatani, Takeshi; Saito, Yuji; Teraoka, Yuden; Yokoya, Akinari

JAERI-Tech 2001-043, 64 Pages, 2001/07

JAERI-Tech-2001-043.pdf:17.85MB

no abstracts in English

JAEA Reports

Design and manufacture of multi-electrode ion chamber for absolute photon-flux measurements of soft X-rays

Yoshigoe, Akitaka; Teraoka, Yuden

JAERI-Tech 2001-026, 17 Pages, 2001/03

JAERI-Tech-2001-026.pdf:2.42MB

no abstracts in English

Journal Articles

A Grating monochromator of BL23SU at SPring-8 covering silicon and oxygen ${it K}$-edges

Yoshigoe, Akitaka; Agui, Akane; Nakatani, Takeshi*; Matsushita, Tomohiro*; Saito, Yuji; Yokoya, Akinari

Journal of Synchrotron Radiation, 8(Part2), p.502 - 504, 2001/03

no abstracts in English

Journal Articles

Commissioning of surface chemistry end-station in BL23SU of SPring-8

Teraoka, Yuden; Yoshigoe, Akitaka

Applied Surface Science, 169-170, p.738 - 741, 2001/01

 Times Cited Count:59 Percentile:91.08(Chemistry, Physical)

no abstracts in English

Journal Articles

Photoionization of Ne$$^{3+}$$ ions in the region of the 1${it s}$ $$rightarrow$$ 2${it p}$ autoionizing resonance

Oura, Masaki*; Yamaoka, Hitoshi*; Kawatsura, Kiyoshi*; Kimata, Junichi*; Hayaishi, T.*; Takahashi, Takehisa*; Koizumi, Tetsuo*; Sekioka, T.*; Terasawa, Michitaka*; Ito, Yo*; et al.

Physical Review A, 63(1), p.014704_1 - 014704_4, 2001/01

 Times Cited Count:15 Percentile:61.17(Optics)

no abstracts in English

Journal Articles

Design of surface chemistry end-station of BL23SU in SPring-8

Teraoka, Yuden; Yoshigoe, Akitaka*

Japanese Journal of Applied Physics, 38(Suppl.38-1), p.642 - 645, 1999/00

 Times Cited Count:16 Percentile:59.91(Physics, Applied)

no abstracts in English

Journal Articles

Current status of JAERI soft X-ray beamline BL23SU

Teraoka, Yuden; Yokoya, Akinari; Saito, Yuji; Nakatani, Takeshi; Okane, Tetsuo; Yoshigoe, Akitaka; Fujimori, Shinichi; *; Shimada, Taihei*; *; et al.

Dai-2-Kai SPring-8 Shinpojium Houbunsyu, p.215 - 239, 1998/00

no abstracts in English

Oral presentation

Study on chemical reactions at materials surfaces via hyperthermal molecular beams

Teraoka, Yuden

no journal, , 

no abstracts in English

20 (Records 1-20 displayed on this page)
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