First MeV ion loss measurements using activation technique in reversed B experiments at JET

G. Bonheure, S. Popovichev, L. Bertalot, A. Murari, S. Conroy

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Fast ions measurements become increasingly important as we move closer to the International Thermonuclear Experimental Reactor (ITER) or burning plasma experiments and further R&D is especially required in the field of fast ion loss measurements [Bonheure et al., Rev. Sci. Instrum. 74, 1726 (2003).] in the perspective of ITER. A boron target mounted on a manipulator was exposed to deuterium plasmas during reversed field experiments at the Joint European Torus (JET). Due to the10B(p,a)7Be reaction,7Be is produced in the boron target by MeV protons escaping the plasma. The proton losses are deduced from measurements of the intensity of decay emission of7Be. Excellent agreement is found between measurements and prediction from fast ion classical drift losses. The MCORBIT Monte Carlo Simulation code was used to predict unconfined orbits fraction. Further developments are presented, including a new dedicated instrument to be used in experiments already planned at JET with ion cyclotron range of frequency accelerated alpha particles. The obtained results will be essential for the design of lost alpha diagnostics on ITER based on activation technique. © 2004 American Institute of Physics.
Original languageEnglish
Pages (from-to)3540 - 3542
Number of pages3
JournalReview of Scientific Instruments
Issue number10 II
Publication statusPublished - Oct 2004
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Physics and Astronomy (miscellaneous)

Cite this

Bonheure, G., Popovichev, S., Bertalot, L., Murari, A., & Conroy, S. (2004). First MeV ion loss measurements using activation technique in reversed B experiments at JET. Review of Scientific Instruments, 75(10 II), 3540 - 3542.