000206265 001__ 206265
000206265 005__ 20190228220036.0
000206265 037__ $$aPOST_TALK
000206265 245__ $$aThe influence of divertor geometry on access to high confinement regimes on the Alcator C-Mod tokamak
000206265 269__ $$a2014
000206265 260__ $$c2014
000206265 336__ $$aPosters
000206265 520__ $$aThe placement of X-point and strike points in a diverted tokamak can have a remarkable impact on properties of the discharge, including thermal and particle confinement. The distinctive divertor of Alcator C-Mod allows us to demonstrate these effects experimentally, as we vary equilibrium shaping to obtain substantial variation of divertor leg length, field line attack angle and divertor baffling. In response to these changes, we observe differences in both L-mode confinement and access to high-confinement regimes (i.e. ELMy H-mode and I-mode). With the ion grad-B drift directed toward the divertor, scanning the strike point can induce ∼ 2x reductions in H-mode power threshold, and can produce a window for I-mode operation with H98 \textgreater\ 1. Recent experiments seek to explore these effects using improved diagnostics, and to extend them to the case with ion grad-B drift directed away from the divertor.
000206265 700__ $$aHughes, J.W.
000206265 700__ $$0240123$$g176719$$aLaBombard, B.
000206265 700__ $$aHubbard, A.
000206265 700__ $$aMarmar, E.
000206265 700__ $$aTerry, J.
000206265 700__ $$aRice, J.
000206265 700__ $$aWalk, J.
000206265 700__ $$aWhyte, D.
000206265 700__ $$aMa, Y.
000206265 700__ $$aCziegler, I.
000206265 700__ $$aEdlund, E.
000206265 700__ $$0240123$$g176719$$aTheiler, Christian Gabriel
000206265 7112_ $$dOctober 27–31, 2014$$cNew Orleans, Louisiana$$a56th Annual Meeting of the APS Division of Plasma Physics
000206265 909C0 $$pCRPP
000206265 909C0 $$0252028$$pSPC
000206265 909CO $$pSB$$pposter$$ooai:infoscience.tind.io:206265
000206265 909C0 $$xU12272$$xU12268$$xU10558$$xU10635$$xU12266$$xU10636$$xU10137$$xU12270$$xU10557$$xU12273$$xU10559$$xU12271$$xU12269$$xU12267$$xU10136
000206265 917Z8 $$x176719
000206265 937__ $$aEPFL-POSTER-206265
000206265 973__ $$aOTHER
000206265 980__ $$aPOSTER