Tokamak:	TFTR
Pulse Number:	52194
Contact: 	M. Zarnstorff
Institution:	PPPL, Princeton University
Date of Shot:	August 20, 1990
Analysis Code:	TRANSP
Run number:	52194a03
Analysis Date:	August 15, 1997
Assumptions: 	Zeff profile determined from carbon density profile 
		measured by CXRS, normalized to a single chord-
		integral VB measurement.  Prior to the start of NBI, 
		Ti profile is calculated assuming chii = 15 x 
		neoclassical, which is the value observed in other 
		expts. During NBI, Ti is measured by CXRS.  Due to 
		diagnostic problems associated with the current 
		ramp, the toroidal velocity is not included associated 
		with the current ramp, the toroidal velocity is not 
		included in this analysis, but Vphi is expected to be 
		negligible because the beam injection was very 
		balanced. Due to limited photon statistics, Ti data are 
		coarsely smoothed in time (75-100 ms) which 
		effectively smooths over sawteeth.  Te and Ne data 
		are smoothed with a 20 ms smoothing interval with 
		breakpoints at sawteeth so that sawteeth are 
		preserved in the Te and Ne data.
Shot Desc.: 	L-mode balanced NBI (12.7 MA) with a current 
		ramp-down from 2 --> 1 MA over a period of 300 ms 
		during NBI (3.5-3.8 sec; NBI extends from 3.0-5.0 
		sec). This shot has the maximum density of a series 
		of similar TFTR L-mode discharges (nebar = 7.3e19 
		for this shot; range of scan = 3.7-7.3e19 for the 2.0 
		MA pre-ramp phase). The confinement data before 
		the start of the current ramp in this sequence of 
		shots can be used to assess the density scaling of 
		confinement in flat-density, L-mode discharges. The 
		confinement during and after the current ramp can 
		be used to assess the influence of the current profile 
		shape on L-mode transport and confinement.

		Prior to the start of the current ramp, this shot has a 
		global confinement time (from magnetics) that is 26% 
		less than predicted by ITER-89P L-mode scaling.  A 
		challenge for proposed transport models is to 
		reproduce this poor confinement performance.
Publication:	Two IAEA papers by M. Zarnstorff et al.:  1990 
		(volume 1, page 109) and1992 (volume 1, p. 111).
Other Info: