Tokamak:	TFTR
Pulse Number:	43020
Contact: 	P. Efthimion
Institution:	PPPL, Princeton University
Date of Shot:	Oct 20, 1989
Analysis Code:	TRANSP
Run number:	43020a02
Analysis Date:	August 21, 1997
Assumptions: 	Zeff profile assumed flat.  Ti and Vphi profiles were 
		measured by CXRS starting at 3.96 seconds.  During 
		the ohmic phase of the discharge (until 3.5 sec) and 
		up until 3.8 seconds, the ion temperature was 
		calculated assuming chii = 15 x neoclassical.  From 
		3.8 - 3.96 seconds the ion temperature profile is 
		taken to be the measured profile at 3.96 sec.  From 
		3.96 - 4.5 seconds Ti was measured by CXRS, and 
		after4.5 sec Ti was once again calculated,  assuming 
		chii = 2 chie.  During this operational  period of TFTR, 
		the outermost CXRS viewing chord was at R=334 cm, 
		i.e. about 17 cm inside the last closed flux surface at 
		R+a=351 cm.  For this analysis an additional CXRS 
		chord was artificially constructed at R=349 cm, 
		assuming Ti(349) = Ti(334)/4. The outermost 
		*measured* chord remains at R=334 cm.  For 
		technical reasons, the L-mode conditions in this scan 
		were produced by helium gas puffing rather than by 
		saturating the limiter with deuterium.   The thermal 
		plasma is a mixture of helium and deuterium.  
		Absent a direct measurement of the helium density, 
		the helium density profile was artificially set to be a 
		fixed multiple of the electron density profile (nHe/ne 
		= 0.275) to provide an appropriate ion dilution to 
		approximately match the measured dd neutron 
		emission.  The electron temperature data for this 
		shot represents an average of several similar shots 
		and thus performs some averaging over sawtooth 
		effects.  
Shot Desc.: 	This is a low-power (4.7 MW) beam-heated L-mode 
		discharge in a 4-shot power scan at constant density.  
		Heating power ranges from ohmic to 13 MW.  In the 
		beam-heated shots NBI is injected from 3.5 to 4.5 
		seconds.  The plasma reaches transport equilibrium 
		in about 300 ms (at 3.8 seconds).   At 4.0 seconds the 
		plasmas were all perturbed by a small helium puff, 
		which allowed the electron diffusivity to be 
		measured through the time-dependent evolution of 
		ne(r,t).  Thus, this scan provides a comparison of the 
		temperature dependence of chii, chie with De which 
		are found to all increase with temperature as 
		Te^(alpha) with alpha = 1.5-2.5.    
Publication:	P. Efthimion et al., Phys. Rev. Lett. 66 (1991) p. 421.
Other Info: 	These shots are identified as sequence LM1.