Select the Ti Model

In this menu you select the model for T_i. The neutron emission and K are read in this menu.

\* Options are:

 1) Model for chi_i profile ............ <chi_i = chi_e> Unsmoothed chi_e
 2) Feedback off, chi_i multiplier is .. <2.00>

 3) Neutron emission (DD) ............. <1.287E+16 +/-  8.2%> .. NE-SS-CW

 4) Impurity Ti model ................. <Ti set equal for all ions>
 5) Species of measured Ti ............ <z=1.000,a=1.000>
 6) Convective multiplier ............. <0.000E+00>
 7) Fixed tauei ....................... <0.000E+00>
 8) Z-exponent on tauei ............... <0.000E+00>

 9) Kalpha Ti (keV) ................... <0.000E+00 +/-  0.0%> .. ZERO
10) Species of Kalpha TI .............. <Ni>

11) Passive cx Ti (keV) ............... <0.000E+00>
12) Limits for passive cx fit (keV) ... <3.5,14.>

13) Eta-i

14) FX: Fixed Neutron Sources

15) Edge Ti value (Te or Ti) .......... <Te_edge>

16) CHers cross-section energy dependence model:  <0=Off>

<1=I;> Ti model option? <n>:

There are three fundamentally different modes for dealing with the ion temperature profile, T_i(r), in SNAP:

• SNAP can use a measured profile, T_i(r), in which case the ion power balance is solved for to determine the local ion heat transport coefficient . This is called analysis mode.
• T_i(r) can be calculated from a fixed model for . Three types of models are available: a neoclassical model ( = a chosen multiple of ), an model ( = value from various theoretical models of turbulence), and a model ( = chosen multiple of ). This is called predictive mode.
• T_i(r) can be calculated from a model, but the multiplicative coefficient for the model is determined, through iteration, to match some measurement. This is called feedback mode. Typically SNAP is asked to match a measurement of central T_i(0), but in ohmic plasmas it can also be asked to match the measured neutron emission.

<1=I;> Ti model option? <n>:  MO

<2> chi_i model to use? <M>:  RETURN
\* Options are:
 1) Rutherford-Julich
 2) Hinton-Hazeltine
 3) Bolton-Ware
 4) Chang-Hinton (z=1)
 5) Chang-Hinton (z>1)
 6) chi_i = chi_e
 7) Measured Ti profile
 8) Profile of Chii

<2> chi_i model to use? <M>: