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Hosaka, Yuji*; Oyama, Tomoko; Oshima, Akihiro*; Enomoto, Satoshi*; Washio, Masakazu*; Tagawa, Seiichi*
Journal of Photopolymer Science and Technology, 26(6), p.745 - 750, 2013/12
Times Cited Count：11 Percentile：35.05(Polymer Science)ZEP520A is one of the most popular positive electron beam (EB) resists used in research and photomask fabrication owing to its excellent properties. Herein, EB-induced initial reactions of ZEP520A were investigated via pulse radiolysis (EB energy: 28 MeV, time resolution: 10 ns). Dissociative electron attachment and formation of a charge transfer complex were definitive contributing factors to the efficient degradation of ZEP520A. Furthermore, products induced by direct ionization of ZEP520A were observed in a highly concentrated ZEP520A solution in tetrahydrofuran, suggesting that initial reactions in the ZEP520A solid film that are induced only by direct ionization could be simulated via pulse radiolysis in specific solutions.
Sakanaka, Shogo*; Akemoto, Mitsuo*; Aoto, Tomohiro*; Arakawa, Dai*; Asaoka, Seiji*; Enomoto, Atsushi*; Fukuda, Shigeki*; Furukawa, Kazuro*; Furuya, Takaaki*; Haga, Kaiichi*; et al.
Proceedings of 1st International Particle Accelerator Conference (IPAC '10) (Internet), p.2338 - 2340, 2010/05
Future synchrotron light source using a 5-GeV energy recovery linac (ERL) is under proposal by our Japanese collaboration team, and we are conducting R&D efforts for that. We are developing high-brightness DC photocathode guns, two types of cryomodules for both injector and main superconducting (SC) linacs, and 1.3 GHz high CW-power RF sources. We are also constructing the Compact ERL (cERL) for demonstrating the recirculation of low-emittance, high-current beams using above-mentioned critical technologies.
Sakanaka, Shogo*; Ago, Tomonori*; Enomoto, Atsushi*; Fukuda, Shigeki*; Furukawa, Kazuro*; Furuya, Takaaki*; Haga, Kaiichi*; Harada, Kentaro*; Hiramatsu, Shigenori*; Honda, Toru*; et al.
Proceedings of 11th European Particle Accelerator Conference (EPAC '08) (CD-ROM), p.205 - 207, 2008/06
Future synchrotron light sources based on the energy-recovery linacs (ERLs) are expected to be capable of producing super-brilliant and/or ultra-short pulses of synchrotron radiation. Our Japanese collaboration team is making efforts for realizing an ERL-based hard X-ray source. We report recent progress in our R&D efforts.
Enomoto, Ichiro*; Katsumura, Yosuke; Soeda, Shin*; Fujishiro, Satoshi*
no journal, ,
no abstracts in English
Maekawa, Yasunari; Enomoto, Kazuyuki; Takahashi, Shuichi*; Iwase, Takanori*; Yamashita, Takashi*; Iwase, Hiroki*; Koizumi, Satoshi
no journal, ,
Detachment of sulfonated grafts in graft-type polymer electrolyte membranes (PEM) were observed in hot water. The detachment is assisted by the interface stress between swelling of the hydrophilic grafts and hydrophobic polymer substrates. The grafted PEM with a clear phase separation structure, observed by small angle neutron scattering (SANS), are subjected to fast detachment of the grafts.
Enomoto, Kazuyuki; Takahashi, Shuichi*; Iwase, Takanori*; Yamashita, Takashi*; Iwase, Hiroki*; Koizumi, Satoshi; Maekawa, Yasunari
no journal, ,
The degradation behavior of graft-type polymer electrolyte membranes consisting of hydrophilic sulfo-containing graft polymers (grafts) in hydrophobic polymer substrates are examined; We employed poly(styrenesulfonic acid) (PSSA) as a hydrophilic grafts and crosslinked poly(tetrafluoroethylene) (cPTFE), poly(ethylene-co-tetrafluoroethylene) (ETFE), and poly(vinylidene fluoride) (PVDF) as a hydrophobic plastic substrate. PSSA-grafted cPTFE, ETFE, and PVDF films are degraded with more than 30 % weight loss in 85 
C for 500 hours. The good agreement between losses of sulfo groups and film weights indicated that only PSSA grafts degraded from cPTFE, ETFE, and PVDF substrates. Using UV, NMR, and GPC, the decomposed extracts in water are confirmed to be PSSA with the same molecular weights. Furthermore, since the elemental analysis of the extracts did not have fluorine atoms, the grafts in all the PSSA-grafted films detach from the fluorinated substrates without decomposition. This is quite new degradation mode of graft-type polymer electrolyte membranes. By taking advantages of the interface abruption of swelled grafts, the chemically and thermally stable grafts attached onto the plastic films can be isolated and analyzed without special treatments.
) in flower color mutation of "Jimba"Omiya, Akemi*; Toyoda, Tomomi*; Watanabe, Hideki*; Enomoto, Keishi*; Hase, Yoshihiro; Yoshioka, Satoshi*
no journal, ,
no abstracts in English
