Skip to main content
eScholarship
Open Access Publications from the University of California

Scintillator-based diagnostic for fast ion loss measurements on DIII-D

  • Author(s): Fisher, RK
  • Pace, DC
  • García-Muoz, M
  • Heidbrink, WW
  • Muscatello, CM
  • Van Zeeland, MA
  • Zhu, YB
  • et al.

Published Web Location

https://doi.org/10.1063/1.3490020Creative Commons Attribution 4.0 International Public License
Abstract

A new scintillator-based fast ion loss detector has been installed on DIII-D with the time response (>100 kHz) needed to study energetic ion losses induced by Alfv́n eigenmodes and other MHD instabilities. Based on the design used on ASDEX Upgrade, the diagnostic measures the pitch angle and gyroradius of ion losses based on the position of the ions striking the two-dimensional scintillator. For fast time response measurements, a beam splitter and fiberoptics couple a portion of the scintillator light to a photomultiplier. Reverse orbit following techniques trace the lost ions to their possible origin within the plasma. Initial DIII-D results showing prompt losses and energetic ion loss due to MHD instabilities are discussed. © 2010 American Institute of Physics.

Many UC-authored scholarly publications are freely available on this site because of the UC Academic Senate's Open Access Policy. Let us know how this access is important for you.

Main Content
Current View