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Yoshino, Hiromitsu; Kishi, Atsuyasu*; Yokota, Hideharu
JAEA-Data/Code 2015-014, 42 Pages, 2015/09
JAEA-Data-Code-2015-014.pdf:11.38MB
JAEA-Data-Code-2015-014-appendix(CD-ROM).zip:4.26MB
Long-term pore-pressure-monitoring has been performed using HDB-1
11 and PB-V01 boreholes in the Horonobe Underground Research Laboratory Project. This report summarizes the results obtained from the starting of monitoring to March 2015.
Hama, Katsuhiro; Mizuno, Takashi; Sasao, Eiji; Iwatsuki, Teruki; Saegusa, Hiromitsu; Sato, Toshinori; Fujita, Tomoo; Sasamoto, Hiroshi; Matsuoka, Toshiyuki; Yokota, Hideharu; et al.
JAEA-Research 2015-007, 269 Pages, 2015/08
JAEA-Research-2015-007.pdf:68.65MBJAEA-Research-2015-007(errata).pdf:0.07MB
We have synthesised the research results from Mizunami/Horonobe URLs and geo-stability projects in the second mid-term research phase. It could be used as technical bases for NUMO/Regulator in each decision point from sitting to beginning of disposal (Principal Investigation to Detailed Investigation Phase). High quality construction techniques and field investigation methods have been developed and implemented and these will be directly applicable to the National Disposal Program (along with general assessments of hazardous natural events and processes). It will be crucial to acquire technical knowledge on decisions of partial backfilling and final closure by actual field experiments in Mizunami/Horonobe URLs as main themes for the next phases.
O
crystalSuzuki, Masayuki; Kiriyama, Hiromitsu; Nakai, Yoshiki*; Okada, Hajime; Daito, Izuru; Bolton, P.; Daido, Hiroyuki; Kondo, Kiminori; Kawanishi, Shunichi; Kagebayashi, Yoshio*; et al.
Proceedings of Conference on Lasers and Electro-Optics and The Quantum Electronics and Laser Science Conference (CLEO/QELS 2010) (CD-ROM), 2 Pages, 2010/05
We have demonstrated efficient second harmonic generation (SHG) of high energy fundamental Nd:YAG laser pulse energy of the multi-joule (J) level at 10-Hz using high optical quality top-seeded solution growth CsBO (TSSG-CBO) crystal. SHG output energy of 1.2 J is obtained with a conversion efficiency of 60%. These results indicate that CBO is a good candidate material for high energy SHG of Nd-doped lasers at the several J level or more with high repetition rate.
O crystalSuzuki, Masayuki; Kiriyama, Hiromitsu; Nakai, Yoshiki; Okada, Hajime; Daito, Izuru; Kagebayashi, Yoshio*; Yokota, Toshio*; Bolton, P.; Daido, Hiroyuki; Kawanishi, Shunichi
Optics Communications, 283(3), p.451 - 453, 2010/02
Times Cited Count：0 Percentile：0(Optics)We have demonstrated efficient frequency doubling of high energy fundamental Nd:YAG laser pulse energy of the multi-J level at a high repetition rate using high optical quality top-seeded solution growth CsBO (TSSG-CBO) crystal. Second-harmonic (532 nm) generation (SHG) output energy of 12 W at 10 Hz is obtained with a conversion efficiency of 60% The numerical calculation SHG efficiency agrees well with the measured results. These results indicate that CBO is a good candidate material for high energy SHG of Nd-doped lasers at the several J level or more with high repetition rate.
Suzuki, Masayuki; Kiriyama, Hiromitsu; Nakai, Yoshiki; Okada, Hajime; Daito, Izuru; Kagebayashi, Yoshio*; Yokota, Toshio*; Bolton, P.; Daido, Hiroyuki; Kawanishi, Shunichi
no journal, ,
A second harmonic generation (SHG) of Nd:YAG or Nd:glass is typically utilizing to pump the Ti:sapphire chirped-pulse amplification laser system for realizing a high intensity pulse laser. CsBO (CBO) crystal has a potential to obtain the high energy SHG because the effective nonlinear coefficient and damage threshold are high. In this presentation, we have demonstrated efficient frequency doubling of high energy fundamental Nd:YAG laser pulse energy of the 1.2 J with a conversion efficiency of 60% at a 10 Hz using high optical quality top-seeded solution growth CBO (TSSG-CBO) crystal. These results indicate that TSSG-CBO is a good candidate material for high energy SHG of Nd-doped lasers at the several J level with high repetition.
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
Yokota, Hiromi*; Fujimoto, Katsushige*; Kawakami, Tomohiko*; Nagayama, Sakiko*; Okazaki, Kodai*; Makuuchi, Etsuyo*; Abe, Yuta; Otaka, Masahiko
no journal, ,
no abstracts in English
Yokota, Hiromi*; Fujimoto, Katsushige*; Kawakami, Tomohiko*; Nagayama, Sakiko*; Abe, Yuta; Otaka, Masahiko
no journal, ,
no abstracts in English
Kawakami, Tomohiko*; Nagayama, Sakiko*; Yokota, Hiromi; Abe, Yuta; Otaka, Masahiko; Fujimoto, Katsushige*; Takagai, Yoshitaka*
no journal, ,
no abstracts in English
Nagayama, Sakiko*; Kawakami, Tomohiko*; Yokota, Hiromi; Abe, Yuta; Otaka, Masahiko; Fujimoto, Katsushige*; Takagai, Yoshitaka*
no journal, ,
no abstracts in English
Yanagisawa, Kayo; Yokota, Hiromi; Matsueda, Makoto; Ishiniwa, Hiroko*; Fujimoto, Katsushige*; Takagai, Yoshitaka*
no journal, ,
Fuel debris is considered a heterogeneous mixture of nuclear fuel, control rods and reactor structural materials that has cooled and solidified, and it is important to understand its composition (elements and isotopes) and distribution to formulate storage, treatment and disposal methods after fuel debris removal. Mass spectrometric imaging using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) is useful for the aforementioned fuel debris analysis because it can visualise the distribution of elements and isotopes at the 10
- 10
g/g level with a spatial resolution of 10-100 m. However, the number of data is enormous when the number of measurement points is large. In this study, an automatic peak detection method using the asymmetric least squares method with a penalty term was developed, data processing for LA-ICP-MS was automated and an intuitive GUI was constructed.
