Tokamak: JET

    Pulse number: 51599

    Contact persons: Pam Stubberfield, Vassili Parail

    Institution:  EFDA-JET

    Date of shot: 20000913

    Analysis codes: TRANSP, EFIT for plasma boundary and initial q profile

    Run number: 51599C01

    Date of analysis: 020211 TRANSP run by Yuri Baranov

    Assumptions made for analysis:

    Ti and Zeff profiles from CX measurements are used. 
    Te profile vs. radius is from KK3 measurements. 
    Ne profile from LIDAR measurements.1D bulk radiation is used in the analysis.
    Rotation velocity profile from CX measurements is provided.
    C impurity. Edge ptcl confinement time is set to 0.3s.
    q profile provided by EFIT used from start of run at 43.50 secs
    until 44.03 secs. TRANSP field diffusion then provides the q profile.
 
    Shot description,purpose of the experiment: Optimised shear discharge

    Publication:  Baranov Y.F et al, "Local Conditions for Ion ITB
                  Formation in JET" submitted to Plasma Physics and
                  Controlled Fusion, special issue
                  Challis C et al, "Influence of the q-profile Shapes
                  on Plasma Performance in JET", ibid
                  Litaudon X et al, "Towards fully Non-inductive Current
                  Drive Operation in JET", ibid

    Additional information:

    Pulse #51599 is an Optimised Shear JET discharges. It should be
    directly compared with shot 53537. The only difference between
    these two shots is that there is no LHCD pre-heating for this shot. 

    The plasma current was ramping up throughout the pulse reaching
    Ip=2.2MA at t=45.0 sec with a toroidal magnetic field Bt=2.6T.
    The main heating power was applied at t=43.8 sec and reached
    its full capacity (10.1MW of NBI and 4.7MW ICRH) at t=45 sec. 
    Plasma energy was rising throughout the main heating phase, 
    reaching the level of 4MJ and confinement time enhancement
    factor H89 exceeding 2.0.  The plasma developed a weak ITB during
    the main heating, which gradually expanded its footpoint to R=3.55m. 

    There are 24 1-D Ufiles and 37 2-D Ufiles.  All beam related quantities
    (energy, particle sources, currents etc) have been smoothed to
    suppress Monte-Carlo noise. In the 2d file the deuterium density is
    stored in NM1. 
    In the file JET_51599_0d.dat data is given at 45.30 secs. 

    Values for kappa and delta in the 0d, 1d and 2d files are from the TRANSP
    output derived from the boundary input definition provided by EFIT.
    kappa = (Zmax-Zmin)/(Rmax-Rmin).   delta = (RGEO - min(R(zmin),R(Zmax)))/a
    XPLIM is from XLOC ; SEPLIM is given by EFIT.
    PLTH is defined by WTH/TAUTH coming directly from TRANSP output and not 
    as defined in the standard list of variables.  
  
    The TRANSP run gives a simulated W_dia and neutron yield about
    15% lower than the measured values.