build_variables Module

minimum minor radius (m)

Minimal radial space between plasma and coils (m)

blanket total surface area (m2)

inboard blanket surface area (m2)

outboard blanket surface area (m2)

inboard blanket box manifold thickness (m) (blktmodel>0)

outboard blanket box manifold thickness (m) (blktmodel>0)

inboard blanket base plate thickness (m) (blktmodel>0)

outboard blanket base plate thickness (m) (blktmodel>0)

inboard blanket breeding zone thickness (m) (blktmodel>0) (iteration variable 90)

outboard blanket breeding zone thickness (m) (blktmodel>0) (iteration variable 91)

inboard blanket thickness (m); (calculated if blktmodel>0) (=0.0 if iblnkith=0)

outboard blanket thickness (m); calculated if blktmodel>0

top blanket thickness (m), = mean of inboard and outboard blanket thicknesses

central solenoid inboard radius (m) (iteration variable 29)

cryostat lid height scaling factor (tokamaks)

cryostat thickness (m)

vacuum vessel inboard thickness (TF coil / shield) (m)

vacuum vessel outboard thickness (TF coil / shield) (m)

vacuum vessel topside thickness (TF coil / shield) (m) (= d_vv_bot if double-null)

vacuum vessel underside thickness (TF coil / shield) (m)

F-value for stellarator radial space check (constraint equation 83)

Fraction of space occupied by CS pre-compression structure

Separation force in CS coil pre-compression structure

first wall total surface area (m2)

inboard first wall surface area (m2)

outboard first wall surface area (m2)

inboard first wall thickness, initial estimate as calculated (m)

outboard first wall thickness, initial estimate as calculated (m)

gap between inboard vacuum vessel and thermal shield (m) (iteration variable 61)

gap between central solenoid and TF coil (m) (iteration variable 42)

minimum gap between outboard vacuum vessel and TF coil (m) (iteration variable 31)

gap between outboard vacuum vessel and TF coil (m)

maximum (half-)height of TF coil (inside edge) (m)

difference in distance from midplane of upper and lower portions of TF legs (non-zero for single-null devices) (m)

height to top of (upper) TF coil leg (m)

half-height of TF coil inboard leg straight section (m)

Switch for existence of central solenoid:

• =0 central solenoid not present
• =1 central solenoid exists

Switch for existence of central solenoid pre-compression structure:

• =0 no pre-compression structure
• =1 calculated pre-compression structure

Switch for placing the TF coil inside the CS

• = 0 TF coil is outside the CS (default)
• = 1 TF coil is inside the CS

Central solenoid thickness (m) (iteration variable 16)

CS coil precompression structure thickness (m)

sum of thicknesses to the major radius (m)

Required space between coil and plasma for blanket shield wall etc (m)

plasma inboard radius (m) (consistency equation 29)

radius to inboard shield (inside point) (m)

radius to outboard shield (outside point) (m)

Radial plasma facing side position of inboard vacuum vessel [m]

Radial inner side position of inboard neutronic shield [m]

Radial plasma facing side position of inboard neutronic shield [m]

Mid-plane inboard TF coil leg radius at the centre-machine side [m]

Mid-plane inboard TF coil leg radius at middle of the coil [m]

Mid-plane inboard TF coil leg radius at the plasma side [m]

Mid-plane outboard TF coil leg radius at the middle of the coil [m]

Switch selecting the he parametrization of the outer radius of the top of the CP part of the TF coil 0 : r_cp_top is set by the plasma shape 1 : r_cp_top is a user input 2 : r_cp_top is set using the CP top and midplane CP radius ratio

Top outer radius of the centropost (ST only) (m)

Ratio between the top and the midplane TF CP outer radius [-] Not used by default (-1) must be larger than 1 otherwise

TF coil horizontal inner bore (m)

TF coil vertical inner bore (m)

Gap between plasma and first wall, inboard side (m) (if iscrp=1) Iteration variable: ixc = 73 Scan variable: nsweep = 58

Gap between plasma and first wall, outboard side (m) (if iscrp=1) Iteration variable: ixc = 74 Scan variable: nsweep = 59

shield total surface area (m2)

inboard shield surface area (m2)

outboard shield surface area (m2)

inboard shield thickness (m) (iteration variable 93)

lower (under divertor) shield thickness (m)

outboard shield thickness (m) (iteration variable 94)

upper/lower shield thickness (m); calculated if blktmodel > 0 (= shldlth if double-null)

allowable stress in CSpre-compression structure (Pa)

inboard TF coil thickness, (centrepost for ST) (m) (input, calculated or iteration variable 13)

vertical distance between centre of TF coils and centre of plasma (m)

TF coil outboard leg / inboard leg radial thickness ratio (i_tf_sup=0 only) (iteration variable 75)

Outboard TF coil thickness (m)

Minimum metal-to-metal gap between TF coil and thermal shield (m)

TF-VV thermal shield thickness, inboard (m)

TF-VV thermal shield thickness, outboard (m)

TF-VV thermal shield thickness, vertical build (m)

vertical gap between vacuum vessel and thermal shields (m)

vertical gap between x-point and divertor (m) (if = 0, it is calculated)

vertical gap between top of plasma and first wall (m) (= vgap_xpoint_divertor if double-null)

gap between vacuum vessel and blanket (m)

length of inboard divertor plate (m)

length of outboard divertor plate (m)

poloidal length, x-point to inboard strike point (m)

poloidal length, x-point to outboard strike point (m)

outboard strike point radius (m)