MAST_08500_com.dat = comments file for ITER Profile Database submission

  Tokamak: MAST

  Pulse number: 08500

  Shot description:  ELMy H mode, high density 'hybrid' shot with co inj NBI 
  heating (H+D)

  Purpose of the shot; To study sawtooth-free H-mode development with co-NBI heating
  and for comparison with the L-mode equivalent

  Contact persons: Carol Brickley, Anthony Field

  Institution: UKAEA Fusion, CULHAM

  Date of shot: 02-Apr-2003

  Time of interest = 0.289s (~ 5ms before H beam is cut-off at 0.2935s, 
  Ruby TS at 0.294s).

  Analysis codes: TRANSP, EFIT for plasma boundary

  Run number: 08500N08

  Date of analysis: 29-Sep-2004 by Carol Brickley(carol.brickley@ukaea.org.uk)

  Assumptions:

  Ion temperature and toroidal rotation from single-time point CXRS 
  measurements at time of H-NBI cut-off

  Te and ne profiles from 200Hz TS normalised to single-time 300-point 
  Ruby TS profile

  Time resolved Ti generated by assuming fixed Ti/Te profile (taken at the 
  time of valid CXRS measurement) normalised at each time point to the core 
  Ti from NPA

  Time resolved rotation from in/out density profile assymmetry scaled to match 
  CXRS measurement at time of valid CXRS measurement.

  q-profile evolution from poloidal field diffusion with initial q-profile from 
  EFIT prior to 0.1s

  Additional:

  Pulse 08500 was conducted under the MAST M3b programme.

  Sawtooth-free H-mode 'hybrid-like' scenario with 1.8 MW co-NBI applied
  at 0.1 s during current ramp at 4.7 MA/s to 800 kA in C-DND configuration 
  with mid-plane HFS gas puff fuelling


  Outboard gas puffing was used.

  The TRANSP run gives stored energy 15% higher than that of EFIT at 0.289s.
  The simulated neutron rate is in good agreement with anu-neutrons.

  The direction of the toroidal field and plasma current were in the
  normal MAST direction; clockwise and anticlockwise respectively as 
  viewed from above.

  There are 40 1-D Ufiles with 20 radial points taken at 0.289s just before the
  TS time at 0.294s; these are in mast_8500_2d.dat. There are 28 0d ufiles with
  one data point taken at 0.289s; these are in mast_8500_1d.dat. 
  mast_8500_0d.dat contains the list of values at 0.289s. 0d and 1d data 
  are smoothed over +/- 0.005s except for nel and dneldt which were eveluated 
  from esm_ne_bar smoothed over +/-0.01s (mini-sawteeth appear between 
  0.28 and 0.31s for signal esm_ne_bar). 

  Most quantities have been smoothed to suppress statistical noise.
  A pre-processor has been run on all raw data to make it TRANSP worthy.

  In all the files, TRANSP output is used unless unavailable. XPLIM, 
  SEPLIM, ZMAG, DELTA, DELTAU, DELTAL, DELTA95, DELTAU95, DELTAL95 and H89P
  are all derived from EFIT traces. Note, however, in mast_8500_0d.dat, 
  TRANSP BEPMHD and BEPDIA are quite different from EFIT BEPMHD and BEPDIA. 

  In the file mast_08500_0d.dat, data is again given at 0.289s.
  XPLIM = -148 - EFIT's efm_xpoint1_z(c); 
  SEPLIM = 1.43 - maximum value of TRANSP's RMJMP for each time point.
  DELTA is the flux surface triangularity.
  PLTH is defined by WTH/TAUTH coming directly from TRANSP output
  and not as defined in the standard list of variables.
  In mast_8500_2d.dat, DELTARU and DELTARL are taken from EFIT traces,
  efm_triang_u(psi)_(c) and efm_triang_l(psi)_(c) which have been forced 
  to 0.0 at the axis and heavily smoothed over +/-0.05s. DELTAR is the 
  average value of these two. Similarly, in  mast_08500_0d.dat, DELTAU95 and
  DELTAL95 are derived from these traces. DELTA95 is the average value.

  Publication:

  A. R. Field, R. J. Akers, C. Brickley, et al., 'Core Heat Transport 
  in the MAST Spherical Tokamak', 20th IAEA Fusion Energy Conference, 
  Vilamoura, Portugal, 2004, EX/P2-11, submitted to Nuclear Fusion