Speaker
Dr
Michael Komm
(Institute of Plasma Physics of the Czech Academy of Sciences)
Description
The COMPASS tokamak is equipped with a set of high resolution diagnostics, which are capable of resolving the pedestal and hence contribute to the multi-machine scaling of the pedestal parameters. The first results obtained for a series of shots at q95 ~ 2.5 in 2015 confirmed that typical pedestal dimensionless parameters obtained at COMPASS are close to those achieved in a multi-machine matching experiments [1].
In order to approach the required values, the COMPASS tokamak [2] has recently enhanced its operational space by achieving a routine operation up to 2.1 T, i.e. Ohmic H-modes could be obtained also for q95 ≥ 3, in addition to the NBI heated H-modes
At the same time, edge diagnostics were significantly upgraded. Particularly, the port for edge Thomson scattering observation system has been modified in order to improve the field of view and allow routine pedestal observation with the standard plasma size. In addition, the number of lasers for Thomson scattering has been doubled in order
to increase the probability to obtain data for the pedestal profile in the last 20% of ELM cycle.
A new experimental campaign allowed to collect the pedestal parameters in discharges at higher q95 for values of ν* and ρ* relevant to the multi-machine matching experiment.
References
[1] M. Beurskens et al. Phys. of Plasmas 18 (2011) 056120
[2] R. Panek et al. Plasma Phys. Control. Fusion 58 (2015) 014015
| Country or International Organization | Czech Republic |
|---|---|
| Paper Number | EX/P6-35 |
Primary author
Dr
Michael Komm
(Institute of Plasma Physics of the Czech Academy of Sciences)
Co-authors
Mrs
Ester Stefanikova
(Institute of Plasma Physics AS CR, Za Slovankou 3, 182 00 Prague 8, Czech Republic)
Mr
Jaroslav Krbec
(Institute of Plasma Physics AS CR, Za Slovankou 3, 182 00 Prague 8, Czech Republic)
Dr
Josef Havlicek
(Institute of Plasma Physics AS CR, Za Slovankou 3, 182 00 Prague 8, Czech Republic)
Lorenzo Frassinetti
(KTH, Royal Institute of Technology)
Mr
Martin Imrisek
(Institute of Plasma Physics AS CR, Za Slovankou 3, 182 00 Prague 8, Czech Republic)
Dr
Miklos Berta
(Institute of Plasma Physics AS CR, Za Slovankou 3, 182 00 Prague 8, Czech Republic)
Dr
Milan Aftanas
(Institute of Plasma Physics AS CR, Za Slovankou 3, 182 00 Prague 8, Czech Republic)
Mr
Ondrej Bogar
(Institute of Plasma Physics AS CR, Za Slovankou 3, 182 00 Prague 8, Czech Republic)
Mr
Ondrej Grover
(Institute of Plasma Physics AS CR, Za Slovankou 3, 182 00 Prague 8, Czech Republic)
Mr
Pavel Hacek
(Institute of Plasma Physics AS CR, Za Slovankou 3, 182 00 Prague 8, Czech Republic)
Dr
Petr Bohm
(Institute of Plasma Physics AS CR, Za Slovankou 3, 182 00 Prague 8, Czech Republic)
Dr
Petra Bilkova
(Institute of Plasma Physics AS CR, Za Slovankou 3, 182 00 Prague 8, Czech Republic)
