Title: Design and simulation of the snowflake divertor control for NSTX-U
Authors: P. J. Vail, M. D. Boyer, A. S. Welander, E. Kolemen
Journal: Plasma Physics and Controlled Fusion
Data for all figures displaying quantitative data is contained in the accompanying hdf5 file. The file contains a group for each figure (or in some cases a set of subfigures). The groups/figures are described below.
File: archive_data.h5
Figure 1 (Fig1):
Within this group is a subgroup for each of the subfigures (a) through (d). In each subgroup, the following quantities are provided: (1) The (r,z) coordinates of the limiter boundary (denoted as rlim and zlim, respectively). Units are m. (2) The (r,z) coordinates of the 129x129 grid at which the poloidal flux is computed (denoted as rg129 and zg129, respectively). Units are m. (3) The poloidal flux on the grid (denoted as psizr) corresponding to the equilibrium in the subfigure of interest. Units are Wb. (4) The poloidal flux on the plasma boundary (denoted as psibry) corresponding to the equilibrium in the subfigure of interest. Units are Wb. (5) The (r,z) coordinates of the primary (denoted as rxP and zxP, respectively) and secondary (denoted as rxS and zxS, respectively) X-points. Units are m. Note that secondary X-points are only plotted in subfigures (c) and (d). (6) The (r,z) coordinates of the four corners of each of the divertor coils (denoted as fcdata), where each of the columns contains data for a unique coil and each of the rows contains the (r,z) coordinates for the coil in the order [r1, r2, r3, r4, z1, z2, z3, z4]. Units are m.
Figure 2 (Fig2):
The following quantities are provided: (1) The (r,z) coordinates of the limiter boundary (denoted as rlim and zlim, respectively). Units are m. (2) The (r,z) coordinates of the 257x257 grid at which the poloidal flux is computed (denoted as rg257 and zg257, respectively). Units are m. (3) The poloidal flux on the grid (denoted as psizr) Units are Wb. (4) The poloidal flux on the plasma boundary (denoted as psibryP) and on the secondary separatrix (denoted as psibryS). Units are Wb. (5) The (r,z) coordinates of the primary (denoted as rxP and zxP, respectively) and secondary (denoted as rxS and zxS, respectively) X-points. Units are m. (6) The (r,z) coordinates of the snowflake centroid (denoted as rc and zc, respectively). Units are m. (7) The (r,z) coordinates of the four corners of each of the divertor coils (denoted as fcdata), where each of the columns contains data for a unique coil and each of the rows contains the (r,z) coordinates for the coil in the order [r1, r2, r3, r4, z1, z2, z3, z4]. Units are m.
Figure 3 (Fig3):
This group contains data for generating the image contained within the NSTX-U block. The following quantities are provided: (1) The (r,z) coordinates of the limiter boundary (denoted as rlim and zlim, respectively). Units are m. (2) The (r,z) coordinates of the 257x257 grid at which the poloidal flux is computed (denoted as rg257 and zg257, respectively). Units are m. (3) The poloidal flux on the grid (denoted as psizr) Units are Wb. (4) The poloidal flux on the plasma boundary (denoted as psibryP) and on the secondary separatrix (denoted as psibryS). Units are Wb. (5) The (r,z) coordinates of the primary (denoted as rxP and zxP, respectively) and secondary (denoted as rxS and zxS, respectively) X-points. Units are m. (7) The (r,z) coordinates of the four corners of each of the PF coils (denoted as fcdata), where each of the columns contains data for a unique coil and each of the rows contains the (r,z) coordinates for the coil in the order [r1, r2, r3, r4, z1, z2, z3, z4]. Units are m. (8) The (r,z) coordinates of the four corners of the OH coil (denoted as ecdata), where each of the columns contains data for a unique coil and each of the rows contains the (r,z) coordinates for the coil in the order [r1, r2, r3, r4, z1, z2, z3, z4]. Units are m. (9) The (r,z) coordinates of the four corners of each of the passive conductors (denoted as vvdata), where each of the columns contains data for a unique conductor and each of the rows contains the (r,z) coordinates for the conductor in the order [r1, r2, r3, r4, z1, z2, z3, z4]. Units are m.
Figure 4 (Fig4):
The following quantities are provided: (1) The (r,z) coordinates of the limiter boundary (denoted as rlim and zlim, respectively). Units are m. (2) The (r,z) coordinates of the 129x129 grid at which the poloidal flux is computed (denoted as rg129 and zg129, respectively). Units are m. (3) The poloidal flux on the grid (denoted as psizr) corresponding to the equilibrium in the subfigure of interest. Units are Wb. (4) The poloidal flux on the plasma boundary (denoted as psibryP) and on the secondary separatrix (denoted as psibryS). Units are Wb. (5) The (r,z) coordinates of the four corners of each of the PF coils (denoted as fcdata), where each of the columns contains data for a unique coil and each of the rows contains the (r,z) coordinates for the coil in the order [r1, r2, r3, r4, z1, z2, z3, z4]. Units are m. (6) The (r,z) coordinates of the four corners of the OH coil (denoted as ecdata), where each of the columns contains data for a unique coil and each of the rows contains the (r,z) coordinates for the coil in the order [r1, r2, r3, r4, z1, z2, z3, z4]. Units are m. (7) The (r,z) coordinates of the four corners of each of the passive conductors (denoted as vvdata), where each of the columns contains data for a unique conductor and each of the rows contains the (r,z) coordinates for the conductor in the order [r1, r2, r3, r4, z1, z2, z3, z4]. Units are m. (8) The (r,z) coordinates of the endpoints of the Isoflux control segments (denoted as isoseg), where each column contains data for a unique control segment and each of the rows contains the (r,z) coordinates for the segement in the order [r1, r2, z1, z2]. Units are m. (9) The (r,z) coordinates of the Isoflux control points (denoted as isopnt), where each column contains data for a unique control point and each of the rows contains the (r,z) coordinates for the control point in the order [r, z]. Units are m.
Figure 5:
This figure is a flowchart containing no quantitative data.
Figure 6 (Fig6):
Within this group is a subgroup for each of the subfigures (a) through (c). Within each of the subgroups is a subgroup for each of the four times shown in the subfigure. In each subsubgroup, the following quantities are provided: (1) The (r,z) coordinates of the limiter boundary (denoted as rlim and zlim, respectively). Units are m. (2) The (r,z) coordinates of the 257x257 grid at which the poloidal flux is computed (denoted as rg257 and zg257, respectively). Units are m. (3) The poloidal flux on the grid (denoted as psizr) corresponding to the equilibrium in the subfigure of interest. Units are Wb. (4) The poloidal flux on the plasma boundary (denoted as psibryP) and on the secondary separatrix (denoted as psibryS). Units are Wb. (5) The (r,z) coordinates of the primary (denoted as rxP and zxP, respectively) and secondary (denoted as rxS and zxS, respectively) X-points. Units are m. (6) Data defining the target trajectories for the X-points. For subfigure (a), the radius (denoted as rhoT) and the (r,z) coordinates of the center (denoted as rcT and zcT, respectively) of the target circle are given. For subfigures (b) and (c), the endpoints of the target line segment (denoted as lineT) are given in the order [r1, r2, z1, z2]. Units are m.
Figure 7 (Fig7):
Within this group is a subgroup for each of the subfigures (a) through (f). In each subgroup, the following quantities are provided: (1) Timetrace of the target value (not applicable for subfigure (d)) with times contained in the quantity target_times and values contained in the quantity target_values. Units of target_times for each subfigure are sec. For subfigures (a) through (e), the units of target_values are cm. For subfigure (f), the units of target_values are deg. (2) Timetrace of the LTV result with times contained in the quantity ltv_times and values contained in the quantity ltv_values. Units of ltv_times for each subfigure are sec. For subfigures (a) through (e), the units of ltv_values are m. For subfigure (f), the units of ltv_values are deg. (3) Timetrace of the LTI result with times contained in the quantity lti_times and values contained in the quantity lti_values. Units of lti_times for each subfigure are sec. For subfigures (a) through (e), the units of lti_values are m. For subfigure (f), the units of lti_values are deg. (4) Array of times as denoted by the colored dashed lines in each of the subfigures (denoted as dashedTimes). Units are sec.
Figure 8 (Fig8):
Within this group is a subgroup for each of the subfigures (a) through (f). In each subgroup, the following quantities are provided: (1) Timetrace of the LTV currents/voltages with times contained in the quantity ltv_times and values contained in the quantity ltv_values. Units of ltv_times for each subfigure are sec. For subfigures (a) through (c), the units of ltv_values are A. For subfigures (d) through (f), the units of ltv_values are V. (2) Timetrace of the LTI currents/voltages with times contained in the quantity lti_times and values contained in the quantity lti_values. Units of lti_times for each subfigure are sec. For subfigures (a) through (c), the units of lti_values are A. For subfigures (d) through (f), the units of lti_values are V. (3) Array of times as denoted by the colored dashed lines in each of the subfigures (denoted as dashedTimes). Units are sec.