TY - GEN
T1 - Investigation of the O2- and X3-mode heating in ASDEX upgrade
AU - Höhnle, H.
AU - Kasparek, W.
AU - Stober, J.
AU - Herrmann, A.
AU - Neu, R.
AU - Stroth, U.
PY - 2009
Y1 - 2009
N2 - For ITER relevant discharges in AUG, two new heating scenarios were developed. Both are based on ECRH, which is used for tungsten accumulation control. With the O2-mode the X2-cutoff, which is reached for higher plasma currents, can be overcome. However a second pass of the non completely absorbed beam must be realized with holographic gratings. First high power measurements are planned in this campaign. The same applies for the X3-mode scenario, where relevant parameters are achieved at B = 1.67 T. For the X3-mode heating scenario, first experiments could be carried out at magnetic fields of 1.8 T, where the X2-resonance acts as beam dump on the high field side. This scenario leads to complete absorption although the absorption in the core (at X3-resonance) is limited to 60 %. This could be demonstrated in experiments at AUG.
AB - For ITER relevant discharges in AUG, two new heating scenarios were developed. Both are based on ECRH, which is used for tungsten accumulation control. With the O2-mode the X2-cutoff, which is reached for higher plasma currents, can be overcome. However a second pass of the non completely absorbed beam must be realized with holographic gratings. First high power measurements are planned in this campaign. The same applies for the X3-mode scenario, where relevant parameters are achieved at B = 1.67 T. For the X3-mode heating scenario, first experiments could be carried out at magnetic fields of 1.8 T, where the X2-resonance acts as beam dump on the high field side. This scenario leads to complete absorption although the absorption in the core (at X3-resonance) is limited to 60 %. This could be demonstrated in experiments at AUG.
UR - http://www.scopus.com/inward/record.url?scp=80051611691&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:80051611691
SN - 9781622763368
T3 - 36th EPS Conference on Plasma Physics 2009, EPS 2009 - Europhysics Conference Abstracts
SP - 378
EP - 381
BT - 36th EPS Conference on Plasma Physics 2009, EPS 2009 - Europhysics Conference Abstracts
T2 - 36th European Physical Society Conference on Plasma Physics 2009, EPS 2009
Y2 - 29 June 2009 through 3 July 2009
ER -