Tokamak:	TFTR
Pulse Number:	44669
Contact: 	M. Zarnstorff
Institution:	PPPL, Princeton University
Date of Shot:	December 7, 1989
Analysis Code:	TRANSP
Run number:	44669a08
Analysis Date:	August 20, 1997
Assumptions: 	To provide high time resolution CXRS data with fixed 
		diagnostic memory, the CXRS acquired data only over 
		the time range 4.46-5.0 sec,  shorter than the NBI 
		injection period of 4.0-5.0 sec. The transp analysis 
		calculates Ti assuming chii = 15 x neoclassical until 
		4.2 seconds; from 4.2-4.46 seconds it holds the Ti 
		profile constant at the measured profile at 4.46 sec, 
		and then from 4.46 sec until the end of NBI it uses 
		the time-dependent CXRS measurement.  There is 
		also a toroidal velocity measurement only over the 
		time range 4.46-5.0 sec.  The Zeff profile is 
		determined from CXRS measurements of the carbon 
		density profile, normalized to a single-chord VB 
		measurement along a sightline that passes through 
		near the plasma center.  Electron temperature 
		measured by ECE radiometer, and Ne by 10-channel 
		interferometer.  
Shot Desc.: 	This is a modest-current (1.05 MA), low-power (14 
		MW) supershot plasma that is perturbed by a 
		deuterium pellet at 4.5 seconds, in the middle of the 
		NBI heating phase.  The pellet raises the volume-
		integrated electron population by about 72%.  The 
		pellet also appears to have a long-term effect on the 
		plasma edge density; although the plasma density 
		decays on a time scale ~100 ms, the edge density 
		remains elevated by 10-20% relative to the pre-
		pellet value.  The temperature and chii response to 
		this perturbation of the ambient temperature (LTi) 
		and density (Lne) gradient scale lengths provides a  
		test of proposed transport models, especially those 
		having a strong marginal stability character.  A 
		limitation of this discharge is that the density is 
		modest: before the helium puff, nebar = 2.7e19 and 
		Neo = 4.8e19, and the Zeff is rather high, 4.0 on-axis.  
		Consequently, in the pre-pellet phase,  the beam 
		density in this plasma is significant, comparable to 
		the thermal-ion density.  This shot is a member of 
		scan SS1 which consists of various perturbations to 
		supershot plasmas with 	pellets and gas puffs.
Publication:	M. Zarnstorff et al., Plasma Physics and Controlled 
		Nuclear Fusion Research 1990 (Proc Thirteenth 
		Conference Proceedings Washington D. C. 1-6 Oct 
		1990) Volume 1, p. 109.
Other Info: 	Member of sequence SS1.