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Onoda, Shinobu; Makino, Takahiro; Oshima, Takeshi
no journal, ,
no abstracts in English
Nishikino, Masaharu; Sato, Katsutoshi; Ishino, Masahiko; Hasegawa, Noboru; Kado, Masataka; Kawachi, Tetsuya; Numasaki, Hodaka*; Teshima, Teruki*; Okano, Yasuaki*; Oshima, Shinsuke*; et al.
no journal, ,
A dedicated radiation biologyn X-ray generation and exposure system has been dedicated for radiation biology is developed. An X-ray pulse of 8.0 keV in energy X-ray pulses is generated with an fs-laser pulse were used to irradiate, and sample cells are irradiated through a custom-made culture dish with a silicon nitride membrane. The X-ray irradiation resulted in DNA double-strand breaks in thea nucleus of a culture cell are caused by X-ray irradiation that were, and similar DNA breaks are obtained to those obtained with athe conventional X-ray source, thus. This result demonstrating thees feasibility of radiobiological studiesy utilizing with a single burst of X-rays focused shining on a single cell specimens.
Kanda, Kazuhiro*; Teraoka, Yuden; Tode, Mayumi; Matsui, Shinji*
no journal, ,
In order to investigate soft X-ray irradiation effects for a diamond-like carbon (DLC) film, thermal desorption spectra (TDS) were observed for a hydrogenated DLC film and a soft X-ray irradiated (300 mAh) hydrogenated DLC film. The temperature elevation rate was 87.5 K/min and the temperature range was from 373 K to 1073 K. In the case of TDS for hydrogen molecules, a large peak was observed around 470 K in the hydrogenated DLC film. The peak, however, was not observed in the non-irradiated hydrogenated DLC film. The elastic recoil analysis showed a large decrease of hydrogen in the X-ray irradiated (300 mAh) sample. We concluded on the basis of these observations that hydrogen molecules desorb by soft X-ray irradiation of 300 mAh.
Umeda, Takahide*; Isoya, Junichi*; Oshima, Takeshi; Onoda, Shinobu; Morishita, Norio
no journal, ,
no abstracts in English
Suzuki, Masayuki; Kiriyama, Hiromitsu; Nakai, Yoshiki; Okada, Hajime; Daito, Izuru; Kagebayashi, Yoshio*; Yokota, Toshio*; Bolton, P.; Daido, Hiroyuki; Kondo, Kiminori; et al.
no journal, ,
no abstracts in English
Kato, Masashi*; Matsushita, Yoshinori*; Ichimura, Masaya*; Hatayama, Tomoaki*; Oshima, Takeshi
no journal, ,
no abstracts in English
-Co compound affecting giant TMR effect, 2Matsumoto, Yoshihiro; Sakai, Seiji; Entani, Shiro; Nagamatsu, Shinichi*; Hojo, Ikuko*; Fujikawa, Takashi*; Shimada, Toshihiro*; Naramoto, Hiroshi*; Maeda, Yoshihito; Yokoyama, Toshihiko*
no journal, ,
no abstracts in English
Okada, Hajime; Nakai, Yoshiki; Kiriyama, Hiromitsu; Tanaka, Momoko; Ochi, Yoshihiro; Sasao, Hajime; Sugiyama, Akira
no journal, ,
We developed a short pulse diode-pumped Nd:YAG laser system for an OPCPA amplification in C-PHOST project. This Nd:YAG laser system is pumping laser for ultra-short OPCPA system as QUADRA (Quality Ultra ADvanced RAdiation Sources) laser.
-wavelength range by using proton beam writing, 2Miura, Kenta*; Machida, Yuki*; Uehara, Masato*; Hanaizumi, Osamu*; Ishii, Yasuyuki; Sato, Takahiro; Takano, Katsuyoshi; Okubo, Takeru; Yamazaki, Akiyoshi; Inoue, Aichi; et al.
no journal, ,
no abstracts in English
Shiine, Yasuharu*; Nishikawa, Hiroyuki*; Mori, Toshiki*; Sato, Takahiro; Ishii, Yasuyuki; Kamiya, Tomihiro; Nakao, Ryota*; Uchida, Satoshi*
no journal, ,
no abstracts in English
Tanabe, Yusuke*; Nishikawa, Hiroyuki*; Watanabe, Toru*; Seki, Yoshihiro*; Sato, Takahiro; Ishii, Yasuyuki; Kamiya, Tomihiro
no journal, ,
no abstracts in English
-FeSi
thin films on Si substrate by scanning transmission electron microscopeSasase, Masato*; Yamamoto, Hiroyuki
no journal, ,
no abstracts in English
Kiriyama, Hiromitsu; Mori, Michiaki; Nakai, Yoshiki; Shimomura, Takuya; Sasao, Hajime; Tanaka, Momoko; Ochi, Yoshihiro; Tanoue, Manabu*; Okada, Hajime; Kondo, Shuji; et al.
no journal, ,
We have developed a femtosecond high intensity laser system, which combines both Ti:sapphire chirped-pulse amplification (CPA) and optical parametric chirped-pulse amplification (OPCPA) techniques, that produces more than 30 J broadband output energy, indicating the potential for achieving peak powers in excess of 500 TW. With a cleaned high-energy seeded OPCPA preamplifier as a front-end in the system, for the final compressed pulse we found that the temporal contrast in this system exceeds 10
on the sub-nanosecond timescale before the main femtosecond pulse. Using diffractive optical elements for beam homogenization of 100-J level high-energy Nd:glass green pump laser in a Ti:sapphire final amplifier, we have successfully generated broadband high-energy output with near-perfect top-hat intensity distributions.
Abe, Hiroshi; Onuki, Shun*; Matsumura, Yoshihito*; Oshima, Takeshi
no journal, ,
no abstracts in English
-AgI super-ionic conductorOno, Masao; Hao, T.; Okayasu, Satoru; Iguchi, Yusuke*; Esaka, Fumitaka; Bagum, R.*; Haruki, Rie; Mashimo, Tsutomu
no journal, ,
no abstracts in English
Ikuta, Tomoya; Hosaka, Koichi; Itakura, Ryuji; Akagi, Hiroshi; Yamanouchi, Kaoru*; Kannari, Fumihiko*; Yokoyama, Atsushi
no journal, ,
Recently, using a photoelectron-photoion coincidence momentum imaging apparatus, we found two possible pathways for the dissociative ionization of ethanol in intense NIR laser fields: one pathway is the direct access to the electronically excited states leading to the dissociation, the other is the stepwise excitation through the ionization to the electronic ground state. In this study, we investigate the dissociative ionization in intense UV laser with the same technique and compare the results with those with the NIR pulses.
Sagisaka, Akito; Mori, Michiaki; Pirozhkov, A. S.; Yogo, Akifumi; Ogura, Koichi; Orimo, Satoshi; Nishiuchi, Mamiko; Tampo, Motonobu; Sakaki, Hironao; Hori, Toshihiko; et al.
no journal, ,
no abstracts in English
Nishiuchi, Mamiko; Sakaki, Hironao; Hori, Toshihiko; Bolton, P.; Ogura, Koichi; Yogo, Akifumi; Pirozhkov, A. S.; Sagisaka, Akito; Orimo, Satoshi; Mori, Michiaki; et al.
no journal, ,
no abstracts in English
To, Kentaro; Sakasai, Kaoru; Nakamura, Tatsuya; Soyama, Kazuhiko; Nagata, Shinji*; Tsuchiya, Bun*; Shikama, Tatsuo*
no journal, ,
Lon-lasting phosphor (LLP) emits photons for a long period after the cessation of irradiation, without requiring any external excitation. This persistent luminescence after the cessation of irradiation is called as a long-lasting emission. Here, the decay time of the long-lasting emission mainly depends on the release rate of electrons in electron trap center, and this rate in turn depends on the energy level of the trap center in the host material. This study examines the properties of long-lasting emission under some kinds of radiation which cause a change of the structure in the host materials by its strong nuclear effects. The decay time of the long-lasting emission is different for different irradiation fluence under proton irradiation, and the emission with fluences of 6.8 
10
p/m
is strongest in our conditions. The change of the decay time is also observed under fast neutron irradiation.
-FeSi
substructure formed by heat-treatment in ultrahigh vacuumMatsumura, Seidai*; Ochiai, Kunihito*; Udono, Haruhiko*; Esaka, Fumitaka; Yamaguchi, Kenji; Yamamoto, Hiroyuki; Hojo, Kiichi
no journal, ,
no abstracts in English