64 lines
1.8 KiB
Markdown
64 lines
1.8 KiB
Markdown
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---
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title: PROFILES.TXT
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section: 5
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---
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# NAME
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profiles.txt --- Kinetic plasma profiles data for **gray**(1)
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# FORMAT
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The plasma profiles can be specified in two ways: either as the free parameters
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of a simple analytical model, or as numerical data in a tabular format.
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## analytical profiles
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The format for the analytical profiles is as follows:
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n₀ a b ! comment
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T₀ T₁ c d
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Z_eff
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The first line contains the parameters for the electron density as a function
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of the normalised poloidal flux *n(ψ)*, which in units of 10¹⁹ m⁻³ is given as:
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n(ψ) = n₀(1 - ψ^a)^b
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Similarly, the second line contains the parameters for the electron temperature
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*T(ψ)*, which is defined in units of keV as:
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T(ψ) = (T₀ - T₁)(1 - ψ^c)^d + T₁
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The last lines contains the (constant) value of the effective charge.
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## numerical profiles
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The format for the numerical consists of a table with the following columns:
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*radial coordinate*, *temperature*, *density*, *effective charge*.
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The first line is a header specifying the number of table rows and subsequent
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lines contains the whitespace-separated records, one row per line:
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nrows ! comment
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ρ₁ T₁ n₁ Z₁
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ρ₂ T₂ n₂ Z₂
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...
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# EXAMPLES
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1. A valid analytical profiles.txt file
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10 0.3 3 ! n₀, a, b
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14 0 2 8 ! T₀, T₁, c, d
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1.0 ! Z_eff
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2. A valid numerical profiles.txt file
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100 ! ρ_t T_e n_e Z_eff
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0.005025 17.9399 24.1717 1.64001
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0.095477 17.4336 23.7527 1.56178
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0.175879 16.9632 23.2699 1.65915
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0.246231 13.7457 22.9230 1.72905
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0.306533 10.4874 22.6312 1.76446
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0.457286 6.59895 21.7133 1.74971
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0.577889 4.74975 19.5653 1.60959
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# SEE ALSO
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**gray**(1)
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