Tokamak:	TFTR
Pulse Number:	43480
Contact: 	P. Efthimion
Institution:	PPPL, Princeton University
Date of Shot:	Oct 30, 1989
Analysis Code:	TRANSP
Run number:	43480a01
Analysis Date:	August 20, 1997
Assumptions: 	Zeff profile assumed flat.  This is an ohmic shot 
		without beams to provide a CXRS measurement of Ti. 
		Throughout the shot, Ti is calculated assuming chii = 
		15 x neoclassical, which is a representation that 
		reproduces Ti in other ohmic shots in which the Ti 
		profile was measured (see S. Scott et al., in 
		Proceedings of the U.S.-Japan Workshop on Ion 
		Temperature Gradient Driven Turbulent Transport, 
		University of Texas at Austin, January 11-14, 1993, 
		AIP conference  proceedings 284).   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 
		= 0.325) 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 the ohmic shot in a 4-shot L-mode 
		temperature 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.