gray/doc/man/profiles.txt.5.md

title	section
PROFILES.TXT	5

NAME

profiles.txt --- Kinetic plasma profiles data for gray(1)

FORMAT

The plasma profiles can be specified in two ways: either as the free parameters of a simple analytical model, or as numerical data in a tabular format.

analytical profiles

The format for the analytical profiles is as follows:

n₀ a b     ! comment
T₀ T₁ c d
Z_eff

The first line contains the parameters for the electron density as a function of the normalised poloidal flux n(ψ), which in units of 10¹⁹ m⁻³ is given as:

n(ψ) = n₀(1 - ψ^a)^b

Similarly, the second line contains the parameters for the electron temperature T(ψ), which is defined in units of keV as:

T(ψ) = (T₀ - T₁)(1 - ψ^c)^d + T₁

The last lines contains the (constant) value of the effective charge.

numerical profiles

The format for the numerical consists of a table with the following columns: radial coordinate, temperature, density, effective charge. The first line is a header specifying the number of table rows and subsequent lines contains the whitespace-separated records, one row per line:

nrows  ! comment
ρ₁ T₁ n₁ Z₁
ρ₂ T₂ n₂ Z₂
...

EXAMPLES

1. A valid analytical profiles.txt file

    10 0.3 3  ! n₀, a, b
    14 0 2 8  ! T₀, T₁, c, d
    1.0       ! Z_eff
   

2. A valid numerical profiles.txt file

    100  ! ρ_t T_e n_e Z_eff
    0.005025  17.9399  24.1717  1.64001
    0.095477  17.4336  23.7527  1.56178
    0.175879  16.9632  23.2699  1.65915
    0.246231  13.7457  22.9230  1.72905
    0.306533  10.4874  22.6312  1.76446
    0.457286  6.59895  21.7133  1.74971
    0.577889  4.74975  19.5653  1.60959
   

SEE ALSO

gray(1)