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@article{Andrew:2019:10.3390/plasma2030024,
author = {Andrew, Y and Bähner, JP and Battle, R and Jirman, T},
doi = {10.3390/plasma2030024},
journal = {Plasma},
pages = {328--338},
title = {H-Mode Power Threshold Studies on MAST †},
url = {http://dx.doi.org/10.3390/plasma2030024},
volume = {2},
year = {2019}
}
TY - JOUR
AB - Analysis of the L–H and H–L transition power thresholds (P<inf>th</inf>) and pedestal parameters are presented for the mega ampere spherical tokamak (MAST). The dependencies of P<inf>th</inf> on the average, core plasma electron density, X-point height, and plasma current are described. Increasing X-point distance from the divertor floor over 10–12 cm is found to increase P<inf>th</inf> by a factor of three, while X-point heights greater than this have no further influence. The X-point height dependence of P<inf>th</inf> is also observed to be sensitive to the plasma current. An I<inf>p</inf> decrease from 0.77 MA to 0.65 MA, is observed to lower P<inf>th</inf> by a factor of three across the X-point height scan and increases the maximum X-point height at which P<inf>th</inf> stops increasing by 3 cm. Finally, a comparison of the experimental results with the predictions by the finite beta drift wave model is made, which provides a reasonable condition for the transition into and out of the H-mode.
AU - Andrew,Y
AU - Bähner,JP
AU - Battle,R
AU - Jirman,T
DO - 10.3390/plasma2030024
EP - 338
PY - 2019///
SP - 328
TI - H-Mode Power Threshold Studies on MAST †
T2 - Plasma
UR - http://dx.doi.org/10.3390/plasma2030024
VL - 2
ER -