Studies of C-2U plasmas using Time-Resolved Multi- Chord Ion-Doppler Diagnostic (MCID). Gupta, D. K., Granstedt, E., Gupta, S., Magee, R., Osin, D., & Tuszewski, M. In Bulletin of the American Physical Society, volume 59, pages UP8.014, Savannah, Georgia, USA, October, 2014. American Physical Society.
abstract   bibtex   
Measurements of ion temperature profile and its time evolution is important for the understanding of FRC confinement and transport properties. Recently, in C-2 plasma device, FRCs with significantly improved confinement and transport proper- ties are observed (HPF14) using higher formation DC field and Lithium wall conditioning. Time evolutions of ion-temperature profiles in these FRCs are measured using upgraded impurity ions passive Doppler spec- troscopy system. Measured line integration profiles are inverted to get the local ion-temperature profiles, by taking in to consideration the lo- cal emissivity and directed ion-velocity. These profiles are measured under different C-2 operation conditions; for example, Neutral Beam power, plasma gun and magnetic field configurations. Radial profiles of ion temperature and its time evolution will be presented. Comparison of ion-temperature time-evolution with neutron measurements, deuterium- ion temperature measurements, and 1-d transport modeling will also be presented.
@inproceedings{gupta_studies_2014,
	address = {Savannah, Georgia, USA},
	title = {Studies of {C}-2U plasmas using {Time}-{Resolved} {Multi}- {Chord} {Ion}-{Doppler} {Diagnostic} ({MCID})},
	volume = {59},
	abstract = {Measurements of ion temperature profile and its time evolution is important for the understanding of FRC confinement and transport properties. Recently, in C-2 plasma device, FRCs with significantly improved confinement and transport proper- ties are observed (HPF14) using higher formation DC field and Lithium wall conditioning. Time evolutions of ion-temperature profiles in these FRCs are measured using upgraded impurity ions passive Doppler spec- troscopy system. Measured line integration profiles are inverted to get the local ion-temperature profiles, by taking in to consideration the lo- cal emissivity and directed ion-velocity. These profiles are measured under different C-2 operation conditions; for example, Neutral Beam power, plasma gun and magnetic field configurations. Radial profiles of ion temperature and its time evolution will be presented. Comparison of ion-temperature time-evolution with neutron measurements, deuterium- ion temperature measurements, and 1-d transport modeling will also be presented.},
	language = {en},
	booktitle = {Bulletin of the {American} {Physical} {Society}},
	publisher = {American Physical Society},
	author = {Gupta, Deepak K. and Granstedt, E. and Gupta, S. and Magee, R. and Osin, D. and Tuszewski, M.},
	month = oct,
	year = {2014},
	pages = {UP8.014}
}

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