Recent experiments at JET aimed at producing 4He ions in the MeV range through third harmonic ion cyclotron resonance heating (ICRH) acceleration of 4He beams in a 4He dominated plasma. MeV range D was also present through parasitic ICRH absorption on residual D. In this contribution, we analyze TOFOR neutron spectrometer data from these experiments. A consistent description of the data is obtained with d(d,n) 3He and 9Be(α,n)12C neutron components calculated using Stix distributions for the fast D and 4He, taking finite Larmor radius effects into account and with a ICRH power partition of PDRF =0.01× P4HeRF, in agreement with TOMCAT simulations. © 2010 American Institute of Physics.
Gatu Johnson, M., Andersson Sundé, E., Cecconello, M., Conroy, S., Ericsson, G., Eriksson, J., et al. (2010). Neutron Spectrometry of JET Discharges with ICRH-Acceleration of Helium Beam Ions. REVIEW OF SCIENTIFIC INSTRUMENTS, 81(10), 10D320 [10.1063/1.3502316].
Neutron Spectrometry of JET Discharges with ICRH-Acceleration of Helium Beam Ions
GORINI, GIUSEPPE;NOCENTE, MASSIMO;
2010
Abstract
Recent experiments at JET aimed at producing 4He ions in the MeV range through third harmonic ion cyclotron resonance heating (ICRH) acceleration of 4He beams in a 4He dominated plasma. MeV range D was also present through parasitic ICRH absorption on residual D. In this contribution, we analyze TOFOR neutron spectrometer data from these experiments. A consistent description of the data is obtained with d(d,n) 3He and 9Be(α,n)12C neutron components calculated using Stix distributions for the fast D and 4He, taking finite Larmor radius effects into account and with a ICRH power partition of PDRF =0.01× P4HeRF, in agreement with TOMCAT simulations. © 2010 American Institute of Physics.
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