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Title: Exploration of low-aspect-ratio tokamak regimes in CDX-U

Conference ·
OSTI ID:10111938

In the low-aspect-ratio tokamak regime, a lower q(a) regime (i.e. q(a) {le}5, A = R/a {approx} 1.5) has been explored in CDX-U. Using a relatively low toroidal magnetic field, plasma discharges with I{sub p} {le}53 kA, and q(a) {ge} 4 [qcyl(a) {ge}1] have been obtained. Low q(a), ohmic plasmas in CDX-U show stronger MHD activity as the edge safety factor is reduced. Those MHD modes appear to reduce the current ramp-up rate and, at present, limit the access to even lower q(a) regimes.

Research Organization:
Princeton Univ., NJ (United States). Plasma Physics Lab.
Sponsoring Organization:
USDOE, Washington, DC (United States)
DOE Contract Number:
AC02-76CH03073
OSTI ID:
10111938
Report Number(s):
PPPL-CFP-3188; CONF-9409281-1; ON: DE95005536
Resource Relation:
Conference: IAEA technical meeting on research using small tokamaks,Madrid (Spain),22-23 Sep 1994; Other Information: PBD: [1994]
Country of Publication:
United States
Language:
English