Tokamak:        TFTR
Pulse Number:   52179
Contact:        E. Synakowski
Institution:    PPPL, Princeton University
Date of Shot:   August 20, 1990
Analysis Code:  TRANSP
Run #:          52179a02
Analysis Date:  August 13, 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 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 is at the lower end in density of a series of similar
                TFTR L-mode discharges.  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.  

Publication:    Two IAEA papers by M. Zarnstorff et al.:  1990 (volume 1, page
                109) and 1992 (volume 1, p. 111).

Other Info: