Step tf turn structure

process/data_structure/superconducting_tf_coil_variables.py

@@ -216,6 +216,33 @@
 j_tf_superconductor: float = None
 """Current density in the superconducting cable [A/m^2]"""
 
+i_tf_turn_type: int = None
+"""Switch for TF turn geometry type"""
+
+dx_tf_turn_tape_stack: float = None
+"""Thickness of the tape stack in the TF turn [m]"""
+
+dr_tf_turn_tape_stack: float = None
+"""Radial thickness of the tape stack in the TF turn [m]"""
+
+a_tf_turn_tape_stack: float = None
+"""Cross-sectional area of the tape stack in the TF turn [m^2]"""
+
+n_tf_turn_superconducting_strands: int = None
+"""Number of superconducting strands in the TF turn"""
+
+x_tf_turn_coolant_channel_centre: float = None
+"""Vertical centre position of the coolant channel in the TF turn [m]"""
+
+dr_tf_turn_stabiliser: float = None
+"""Radial thickness of the stabiliser in the TF turn [m]"""
+
+dx_tf_turn_stabiliser: float = None
+"""Toroidal thickness of the stabiliser in the TF turn [m]"""
+
+a_tf_turn_stabiliser: float = None
+"""Cross-sectional area of the stabiliser in the TF turn [m^2]"""
+
 # Vacuum Vessel stress on TF coil quench
 
 vv_stress_quench: float = None
@@ -320,6 +347,15 @@ def init_superconducting_tf_coil_variables():
     global f_a_tf_turn_cable_space_cooling
     global c_tf_turn_cables_critical
     global j_tf_superconductor
+    global i_tf_turn_type
+    global dx_tf_turn_tape_stack
+    global dr_tf_turn_tape_stack
+    global a_tf_turn_tape_stack
+    global n_tf_turn_superconducting_strands
+    global x_tf_turn_coolant_channel_centre
+    global dr_tf_turn_stabiliser
+    global dx_tf_turn_stabiliser
+    global a_tf_turn_stabiliser
 
     is_leg_cp_temp_same = 0
     tf_fit_t = 0.0
@@ -380,3 +416,12 @@ def init_superconducting_tf_coil_variables():
     f_a_tf_turn_cable_space_cooling = 0.0
     c_tf_turn_cables_critical = 0.0
     j_tf_superconductor = 0.0
+    i_tf_turn_type = 0
+    dx_tf_turn_tape_stack = 0.0
+    dr_tf_turn_tape_stack = 0.0
+    a_tf_turn_tape_stack = 0.0
+    n_tf_turn_superconducting_strands = 0
+    x_tf_turn_coolant_channel_centre = 0.0
+    dr_tf_turn_stabiliser = 0.0
+    dx_tf_turn_stabiliser = 0.0
+    a_tf_turn_stabiliser = 0.0

process/init.py

@@ -8,6 +8,7 @@
 import process
 import process.iteration_variables as iteration_variables
 import process.process_output as process_output
+import process.superconducting_tf_coil as superconducting_tf_coil_module
 from process import constants, data_structure
 from process.constraints import ConstraintManager
 from process.data_structure.blanket_library import init_blanket_library
@@ -811,6 +812,15 @@ def check_process(inputs):  # noqa: ARG001
                 "Constraint equation 10 (CP lifetime) to used with ST desing (itart=1)"
             )
 
+    if (
+        data_structure.superconducting_tf_coil_variables.i_tf_turn_type == 0
+        and data_structure.tfcoil_variables.i_tf_sup
+        not in superconducting_tf_coil_module.CABLE_SUPERCONDUCTORS
+    ):
+        raise ProcessValidationError(
+            "i_tf_turn_type = 0 can only be used with cable type superconductors"
+        )
+
     #  Pulsed power plant model
     if data_structure.pulse_variables.i_pulsed_plant == 1:
         data_structure.global_variables.icase = "Pulsed tokamak model"

process/input.py

@@ -2203,6 +2203,9 @@ def __post_init__(self):
     "n_tf_wp_pancakes": InputVariable(
         data_structure.tfcoil_variables, int, range=(1, 100)
     ),
+    "i_tf_turn_type": InputVariable(
+        data_structure.superconducting_tf_coil_variables, int, choices=[0, 1, 2]
+    ),
     "n_rad_per_layer": InputVariable(
         data_structure.tfcoil_variables, int, range=(1, 500)
     ),