jet_53521_com.dat = comments file for ITER Profile Database submission
 
 Tokamak: JET

 Pulse number: 53521

 Shot description,purpose of the shot: 
   Optimised shear discharge with high performance and strong ITB's

 Contact persons: Robert Budny (budny@princeton.edu), Xavier Litaudon, Xavier Garbet

 Institution:  EFDA-JET

 Date of shot: 20010208

 Time of interest = 10.0s (50.0s in JET PPF time) for strong ITB

 Analysis codes: TRANSP and EFIT (for plasma boundary)

 Run number: 53521C25 at PPPL (in mdsplus server)

 Date of analysis: 20041206 TRANSP run by Robert Budny
   Resubmittion adding PRES

 Assumptions made for analysis:

  Ti and toroidal rotation velocity profiles from CX measurements.
  Te from ece emission, extrapolated near the edge.
  Ne profiles vs. radius from LIDAR measurements.
  Density of 2 impurity species (C and Ni) used to produce a Zeff profile. 
  1D bulk radiation is used in the analysis.
  Particle confinement time is calculated from source rates.
  q profile from MSE measurements at 4.42 and 13.40s
  Note that the q-profile is deeply inverted with a current hole.

 Additional information:

  Pulse #53521 is one of the best long duration optimised Shear JET discharges. 
  Plasma breakdown was assisted by LHCD with the power Plh=2.6-2.9MW applied 
  from t=1.0 -13.0 sec.
  A current hole was measured via MSE starting at 4.4s and appears to
  have lasted atleast until 13.4s

  The direction of the toroidal field and plasma current were in the
  normal JET direction - clockwise viewed from above.
  The NBI voltages were 135 keV for 8 beams and 80keV for 8.

  The plasma current was ramping up to 2.0MA
  The toroidal magnetic field Bt=3.6T. 

  The main heating power consisted of 14.9 MW D-NBI (4.0-13.5s) and
  4MW H-minority ICRH (3.5-11.7s)
  The plasma developed an electron ITB early, and an excellent ion ITB at 5s.
  The transp run used 50 zones instead of the traditional 20.
 
  All beam related quantities (energy, particle sources, currents etc)
  have been smoothed to suppress Monte-Carlo noise.
  In the file JET_53521_0d.dat data is given at 10.0 secs. 
  In the file JET_53521_2d.dat data NM1 and NM3 are the caclulated
  densities of D and trace T.
  NIMP contains the impurity density, dominated by carbon.

  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 and SEPLIM are 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 20% lowered than the measured value
  and a neutron emission rate in excellent agreement.

 Publications:  
    1) For a general description of 53521 and its ITB's see
       C.D.Challis, et al. "Influence of the q-profile
       shape on plasma performance in JET", PPCF <44> (2002)
    2) For an analysis of transport and microturbulence linear stability see
       R.V.Budny, et al., "Microturbulence and flow shear in high-
       performance JET ITB plasma", PPCF <44> (2002) 1215