jet_52009_com.dat = comments file for ITPA WDB Profile Database submission

 Tokamak: JET

 Pulse number: 52009

 Shot description, purpose of the shot: 
    ELMy H-mode with high confinement, high density, and steady state

 Contact persons: Robert Budny (budny@princeton.edu), Jef Ongena

 Institution: EFDA-JET

 Date of shot: 20001010

 Time of interest = 20.2s (60.2s in JET PPF time) for steady state.

 Analysis codes: TRANSP and EFIT (for plasma boundary)

 Run number: 52009B02 done at PPPL, available via mdsplus

 Date of analysis: 20081104 TRANSP run by Robert Budny
   resubmission fixing VROTM

 Assumptions for analysis:

  Up/down asymmetric boundary given by EFIT.
  Ti, toroidal rotation, C, Be density profiles from CX measurements
  during NBI between x (sqrt. normalized toroidal flux)=0.2 and 0.8.
  Ti extrapolated to Te beyond x=0.8
  Zeff profile calculated from the C and Be density profiles.
  Te and ne profiles from LIDAR measurements
  Radiation profile from inversion of bolometry measurements
  Sawteeth breaks from ECE measurements

 Additional information:

  Pulse 52009 was conducted under the Confinement Physics Task Force
  to investigate the influence of triangularity on confinement, pedestal,
  and SOL parameters.
  The plasma boundary was close to double null with low X-point
  The upper and lower triangularities of the boundary were approximately
  0.45 and 0.35. The elongation of the boundary was approximately 1.65
  The plasma current was 2.5 MA and the toroidal field was 2.7 T.
  The auxilliary heating consisted of D-NBI ramped up to a flattop
  value of approximately 15 MW from 17 to 23 s in the TRANSP run
  (57-63 s in JET time).
  The ELMs were of Type I with a frequency of approximately 25 Hz.
  The sawteeth frequency was approximately 8 Hz during the NBI.
  The Greenwald fraction was near 74% for 4 sec.
  With similar subsequent pulses, this pulse forms a density scan with
  various values of gas puffing.

  The TRANSP run gives a simulated W_dia about 20% lower than the measured
  value. The simulated neutron rate agrees well with the peak measured
  value (6.0E15/s) occuring early in the NBI phase, but the simulated
  value later in the flattop phase is high about 40-60%.
  This discrepancy could be due to Z_eff being too low or Ti being
  too high.

  The EFIT boundary was specialized to account for the near double
  null configuration.

  The direction of the toroidal field and plasma current were in the
  normal JET direction - clockwise viewed from above.

  The transp calculations have been done on a 50 zone radial grid rather than
  the normal 20 grid.
  Many quantities have been smoothed to suppress Monte-Carlo noise. 

  In jet_52009_2d.dat, NM1 is the trace thermal H density, NM2 is the main
  ion D density, and NM3 is the trace T density. NM4 is the combined impurity 
  dominantly C and trace Be measured densities.
  NFAST1 is the deuterium beam ion density.

  In jet_52009_0d.dat data is given at 20.2 secs.
  XPLIM and SEPLIM are from XLOC.
  DELTA is the average triangularity.
  and not as defined in the standard list of variables.

 Publications:
    1) For general description of high density JET ELMy H-mode plasmas see
       G. Saibene, et al, "Improved performance of ELMy H-mode
       at high density by plasma shaping in JET", Plasma Physics
       Controlled Fusion <44> (2002) 1769-1799,
    2) For a description of TRANSP analysis of JET ELMy H-mode plasmas see
       R.V. Budny, et al, "Local transport in Joint European
       Tokamak edge-localized, high confinement mode plasmas
       with H, D, DT, and T isotopes", Physics of Plasmas <7>
       (2000) 5038-5050.