jet_42976_com.dat = comments file for ITPA WDB Profile Database submission

 Tokamak: JET

 Pulse number: 42976

 Shot description, purpose of the shot: 
   Hot-ion H-mode with world record DT fusion rate.

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

 Institution:  EFDA-JET

 Date of shot: 19971031

 Time of interest = 13.35s (53.35s in JET PPF time) just before time of
   peak neutron emission during a giant ELM followed by a disruption

 Analysis codes: TRANSP and EFIT (for plasma boundary)

 Run number: 42976C14 done at PPPL, stored at JET and on mdsplus server

 Date of analysis: 20080319 by Robert Budny
   This is a resubmission fixing VROTM

 Assumptions made for analysis:

  50 zones
  Up/down asymmetric boundary given by EFIT.
  Ti, toroidal rotation velocity, and Zeff profiles from CX measurements.
  Te and Ne profiles from LIDAR measurements.
  1D bulk radiation is used in radiation emission.
  Particle confinement time is calculated from source rates.
  q profile calculated in TRANSP from poloidal field diffusion and
  a sawtooth mixing model using sawtooth breaks observed in ece emission .

 Additional information:

  Pulse #42976 set the record DT fusion emission rate = 16.0 MW.
  The main heating power was a mix of 12 MW D-NBI and 11.4 MW T-NBI.
  H-minority ICRH of 3.0MW with phasing -90,+90,-90,+90 degrees was also used.

  The direction of the toroidal field and plasma current were in the
  normal JET direction - clockwise viewed from above.
  The NBI voltages were 150 keV for 7 beams and 80 for 8 beams.

  5000 Monte-Carlo ions were assumed for the beam ions and fast fusion alpha 
  particles to minimize noise. 

  In the file JET_42976_0d.dat data is given at 13.35 secs. 

  Values for elongation and triangularity in the 0d, 1d and 2d files are from 
  the TRANSP output derived from the boundary input definition provided by EFIT.
  KAPA = (Zmax-Zmin)/(Rmax-Rmin); DELTA = (RGEO - min(R(zmin),R(Zmax)))/a
  XPLIM and SEPLIM are given by EFIT.
  as defined in the standard list of variables.  
  
  The TRANSP run gives a simulated W_dia in excellent agreement with the 
  measured values, and a neutron emission rate in excellent agreement until
  13.2s, then decreasing below the measured values.

  Publications:  
    1) For a discussion of alpha parameters in 42976 during the giant ELM see
       S.Sharapov, D.Borba, A.Fasoli, et al., "Stability of alpha particle
       driven Alfven eigenmodes in high performance JET DT plasmas" 
       Nuclear Fusion <39> (1999) 373.
    2) For an analysis of fusion alpha parameters and ICRH in 42976 at 13.35s see
       R.V.Budny, "Fusion alpha parameters in DT plasmas with high DT fusion
       rates", Nuclear Fusion <42> (2002) 1382.
    3) For an analysis of transport and use of the TRANSP code for
       42976 and other JET ELMy H-mode plasmas see
       R.V.Budny, et al., "Local transport in Joint European edge-localized
       high-confinement mode plasmas with H, D, DT, and T isotopes",
       Phys. of Plasmas <7> (2000) 5038