Y Lin et al 2003 Plasma Phys. Control. Fusion 45 1013 doi:10.1088/0741-3335/45/6/313
Y Lin1, S J Wukitch1, P T Bonoli1, E Marmar1, D Mossessian1, E Nelson-Melby2, P Phillips3, M Porkolab1, G Schilling4, S Wolfe1 and J Wright1
Show affiliationsLocalized direct electron heating (EH) by mode-converted (MC) ion cyclotron range of frequencies (ICRF) waves in D(H) tokamak plasmas has been clearly observed for the first time in Alcator C-Mod. Both on- and off-axis (high field side) mode conversion EH (MCEH) have been observed. The MCEH profile was obtained from a break-in-slope analysis of electron temperature signals in the presence of radio frequency shut-off. The temperature was measured by a 32-channel high spatial resolution (≤7 mm) 2nd harmonic heterodyne electron cyclotron emission system. The experimental profiles were compared with the predictions from a toroidal full-wave ICRF code TORIC. Using the hydrogen concentration measured by a high-resolution optical spectrometer, TORIC predictions were shown qualitatively in agreement with the experimental results for both on- and off-axis MC cases. From the simulations, the EH from MC ion cyclotron wave and ion Bernstein wave is examined.
52.55.Fa Tokamaks, spherical tokamaks
52.35.Tc Shock waves and discontinuities
52.50.-b Plasma production and heating
52.35.Fp Electrostatic waves and oscillations (e.g., ion-acoustic waves)
Issue 6 (June 2003)
Received 11 February 2003
Published 20 May 2003
Y Lin et al 2003 Plasma Phys. Control. Fusion 45 1013
V P Godbole et al 2005 Nanotechnology 16 1186
T H K Barron and T G Gibbons 1974 J. Phys. C: Solid State Phys. 7 3269
Jonathan Hare 2008 Phys. Educ. 43 572
Gerhard Baur et al 1998 J. Phys. G: Nucl. Part. Phys. 24 1657
Stephen D Clow et al 2009 New J. Phys. 11 115007
P F Bagwell 1990 J. Phys.: Condens. Matter 2 6179
M H Naderi et al 2004 J. Phys. A: Math. Gen. 37 3225
R A Fox 2002 Phys. Med. Biol. 47 R1
Donald R Larson and Nicholas G Paulter Jr 2007 Metrologia 44 64