The response of a fast scintillator screen (YAP:Ce) to low energy ions (0-40 keV) and its use to detect fast-ion-loss in stellarator TJ-II Articles uri icon

authors

  • MARTINEZ SANCHEZ, MANUEL
  • ZURRO, B.
  • BACIERO, A.
  • JIMENEZ REY, D.
  • TRIBALDOS MACIA, VICTOR
  • MALO, M
  • CRESPO, MT
  • Muñoz, D

publication date

  • November 2016

issue

  • 11

volume

  • 87

International Standard Serial Number (ISSN)

  • 0034-6748

Electronic International Standard Serial Number (EISSN)

  • 1089-7623

abstract

  • A systematic study of scintillation materials was undertaken to improve the time resolution of the fast ion diagnostic currently installed at TJ-II stellarator. It was found that YAP:Ce (formula YAlO3:Ce, Yttrium Aluminum Perovskite doped with Cerium) ionoluminescence offers better sensitivity and time response compared to the standard detector material, SrGa2S4:Eu (TG-Green), currently used in TJ-II. A comparison between both materials was carried out by irradiating them with H+ ions of up to 40 keV using a dedicated laboratory setup. It is found that for the low energy ions of interest at TJ-II, YAP:Ce offers 20 times higher sensitivity than TG-Green and much faster decay time, 27 ns versus 540 ns. It is expected that the use of YAP:Ce in combination with a faster data acquisition and an ion counting software as part of the TJ-II ion luminescent probe will provide 20 times faster data on ion loss. Published by AIP Publishing.