TY - JOUR
T1 - Anomalous beam-ion loss in tftr reversed magnetic shear plasmas
AU - Ruskov, E.
AU - Bell, M.
AU - Budny, R. V.
AU - Mc Cune, D. C.
AU - Medle, S. S.
AU - Redi, M. H.
AU - Scott, S.
AU - Synakowski, E. J.
AU - von Goeler, S.
AU - White, R. B.
AU - Zweben, S. J.
PY - 1999
Y1 - 1999
N2 - Anomalous beam-ion loss has been observed in an experiment with short tritium beam pulses injected into deuterium-beam-heated Tokamak Fusion Test Reactor plasmas (PNBI = 15 MW) with reversed magnetic shear (RS). Comparisons of the measured total 14 MeV neutron emission, the neutron flux along eight radial locations, and the perpendicular plasma stored energy with predictions from an extensive set of TRANSP simulations suggest that about 40% beam power is lost on a time scale much shorter than the tritium beam pulse length Δt = 70 ms. In contrast with recent results [K. Tobita et al., Nucl. Fusion 37, 1583 (1997)] from RS experiments at JT-60U, we were not able to show conclusively that magnetic field ripple is responsible for this anomaly.
AB - Anomalous beam-ion loss has been observed in an experiment with short tritium beam pulses injected into deuterium-beam-heated Tokamak Fusion Test Reactor plasmas (PNBI = 15 MW) with reversed magnetic shear (RS). Comparisons of the measured total 14 MeV neutron emission, the neutron flux along eight radial locations, and the perpendicular plasma stored energy with predictions from an extensive set of TRANSP simulations suggest that about 40% beam power is lost on a time scale much shorter than the tritium beam pulse length Δt = 70 ms. In contrast with recent results [K. Tobita et al., Nucl. Fusion 37, 1583 (1997)] from RS experiments at JT-60U, we were not able to show conclusively that magnetic field ripple is responsible for this anomaly.
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U2 - 10.1103/PhysRevLett.82.924
DO - 10.1103/PhysRevLett.82.924
M3 - Article
AN - SCOPUS:0001567562
SN - 0031-9007
VL - 82
SP - 924
EP - 927
JO - Physical Review Letters
JF - Physical Review Letters
IS - 5
ER -