Tokamak:	TFTR
Pulse Number:	43162
Contact: 	M. Zarnstorff
Institution:	PPPL, Princeton University
Date of Shot:	Oct 24, 1989
Analysis Code:	TRANSP
Run number:	43162a07
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 
		4.1 seconds; from 4.1-4.46 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 is 
		measured by ECE, and electron density is measured 
		by a 10-channel interferometer.
Shot Desc.: 	This is a cononical low-current (1.0 MA) low power 
		(13.6 MW) supershot plasma that is perturbed by a 
		small helium gas puff at 4.9 sec, near the end of 
		beam injection.  Because helium recycles at the 
		limiter with a near-unity recycling coefficient, it 
		increases the edge density for the duration of NBI.  
		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 = 2.75e19 and 
		Neo = 5.0e19, and the Zeff is rather high, 3.8 on-axis.  
		Consequently the beam density in this plasma is 
		significant, comparable to the thermal-ion density.  
		This shot is a member of scan SS1, which consists 
		various perturbations to supershot plasmas by 
		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: 	Sequence SS1