S Fujino

Publications (4)2.97 Total impact

• Article: Optical properties and structure of Pr3+-doped Al(PO3)3–LiF glasses as scattered neutron scintillator for nuclear fusion diagnostics

  T Murata, S Fujino, H Yoshida, Y Arikawa, T Nakazato, T Shimizu, N Sarukura, M Nakai, T Norimatsu, H Azechi, K Kamada, Y Usuki, T Suyama, A Yoshikawa, N Sato, H Kan
  [show abstract] [hide abstract]
  ABSTRACT: Scattered neutron diagnostics is an indispensable tool for both inertial confinement and magnetic confinement fusion research. For this purpose, a fast-response neutron scintillator with a high cross section for scattered neutrons is strongly required. Recently, based on our material design strategy, we have successfully developed the fast response time Pr3+-doped 20Al(PO3)3-80LiF glass scintillator for scattered neutron originated from inertial confinement fusion. The matrix glass 20Al(PO3)3-80LiF shows good glass forming ability, chemical durability and transparency in the deep ultraviolet region. The purpose of this work is to investigate the glass structure of 20Al(PO3)3-80LiF glasses using Raman spectroscopy and to discuss the relationship between physical and scintillation properties and glass structure.
  IOP Conference Series Materials Science and Engineering 07/2011; 18(11):112006.
• Article: Down-scattered neutron imaging detector for areal density measurement of inertial confinement fusion.

  Y Arikawa, K Yamanoi, T Nakazato, E S Estacio, T Shimizu, N Sarukura, M Nakai, H Hosoda, T Norimatsu, Y Hironaka, [......], N Izumi, T Murata, S Fujino, H Yoshida, K Kamada, Y Usuki, T Suyama, A Yoshikawa, N Satoh, H Kan
  [show abstract] [hide abstract]
  ABSTRACT: A custom developed (6)Li glass scintillator (APLF80+3Pr) for down-scattered neutron diagnostics in inertial confinement fusion experiments is presented. (6)Li provides an enhanced sensitivity for down-scattered neutrons in DD fusion and its experimentally observed 5-6 ns response time fulfills the requirement for down-scattered neutron detectors. A time-of-flight detector operating in the current mode using the APLF80+3Pr was designed and its feasibility observing down-scattered neutrons was demonstrated. Furthermore, a prototype design for a down-scattered neutron imaging detector was also demonstrated. This material promises viability as a future down-scattered neutron detector for the National Ignition Facility.
  The Review of scientific instruments 10/2010; 81(10):10D303. · 1.52 Impact Factor
• Article: A scattered-neutron detector for areal density measurement

  Y Arikawa, T Murata, S Fujino, H Yoshida, K Yamanoi, T Nakazato, T Shimizu, N Sarukura, M Nakai, T Norimatsu, H Azechi, K Kamada, Y Usuki, T Suyama, A Yoshikawa, N Satoh, H Kan
  [show abstract] [hide abstract]
  ABSTRACT: Experimental results are presented on the neutron scintillating properties of a custom-designed Praseodymium-doped Lithium-6 glass for a new deuterium-deuterium (DD) fusion scattered-neutron detector. Luminescence was observed at 278 nm-wavelength, and time-resolved measurement yielded ~5.4 ns decay time for neutron excitation. Actual time-of-flight data in laser fusion experiments at the GEKKO XII facility at the Institute of Laser Engineering (ILE), Osaka University reveal that it can clearly discriminate fusion primary-neutrons from the x-ray signals. This material promises the realization of more accurate DD fusion scattered-neutron diagnostics. Design work for a scattered-neutron detector is being conducted for the Fast Ignition Realization Experiment (FIRE-X) at ILE.
  Journal of Physics Conference Series 09/2010; 244(3):032041.
• Article: Custom-Designed Fast-Response Praseodymium-Doped Lithium 6 Fluoro-Oxide Glass Scintillator With Enhanced Cross-Section for Scattered Neutron Originated From Inertial Confinement Fusion

  T. Murata, S. Fujino, H. Yoshida, Y. Arikawa, T. Nakazato, T. Shimizu, N. Sarukura, M. Nakai, T. Norimatsu, H. Azechi, K. Kamada, Y. Usuki, T. Suyama, A. Yoshikawa, N. Sato, H. Kan
  [show abstract] [hide abstract]
  ABSTRACT: Scintillation properties of ${hbox{Pr}}^{3+}$ -doped 20 ${hbox{Al}}({hbox{PO}}_{3})_{3}$ –80 LiF glasses melted in ${hbox{N}} _{2}$ were investigated to seek a candidate for a scattered neutron scintillator in nuclear fusion diagnostics. The fluorescence lifetime of the sample with 217 nm ultraviolet femtosecond pulse excitation was measured to be 19.5 ns. More importantly, the fluorescence lifetime with alpha particles from $^{241}{hbox{Am}}$ radioisotope excitation was determined to be 6.7 ns. Based on our material design strategy, we have successfully developed the fast response time praseodymium-doped $^{6}{hbox{Li}}$ glass scintillator for scattered neutron diagnostics.
  IEEE Transactions on Nuclear Science 07/2010; · 1.45 Impact Factor