Publication Date:
2016-07-19
Description:
Calibration is a crucial procedure in electron temperature ( T e ) inference from a typical electron cyclotron emission (ECE) diagnostic on tokamaks. Although the calibration provides an important multiplying factor for an individual ECE channel, the parameter Δ T e / T e is independent of any calibration. Since an ECE channel measures the cyclotron emission for a particular flux surface, a non-perturbing change in toroidal magnetic field changes the view of that channel. Hence the calibration-free parameter is a measure of T e gradient. B T -jog technique is presented here which employs the parameter and the raw ECE signals for direct measurement of electron temperature gradient scale length.
Print ISSN:
0034-6748
Electronic ISSN:
1089-7623
Topics:
Electrical Engineering, Measurement and Control Technology
,
Physics