sct_primary_segments

The full file can be found in the Simulation Model repository here.

The first 30 lines of the file are:

# Format of lines: type nseg { rmin rmax dphi phi0 | x y diam rot | rot x1 y1 x2 y2 x3 y3 [ ... ] }
#    type: RINGsegments | SQUAREsegments | (Y)HEXsegments | CIRCULARsegments | POLYgonsegments
#          (the capital part being the minimum abbreviation required).
#          Instead of the two fundamental orientations of hexagons used
#          for pixels and mirror tiles in single-reflector configurations,
#          the orientation of hexagons is defined by the rotation angle
#          (0 degrees corresponding to shape type 1, with two flat sides
#          parallel to the x axis, 90 deg. corresponding to shape type 3).
#    nseg: Number of segments in this group; must be =1 except for ring segments
#    Ring segments:
#       rmin, rmax: minimum and maximum radius of ring in x/y projection [cm].
#       dphi: angle around axis subtended by each segment [deg.];
#             for a complete ring it would be 360/nseg.
#       phi0: angle around axis where first segment starts [deg.].
#    Polygon segments (configured individually):
#       rot: rotation angle of whole segment around optical axis.
#       x{, }y: Comma or blank separated corner positions (minimum 3).
#    Other segment types (configured individually):
#       x, y: position of segment center in x/y projection [cm].
#       diam: diameter of segment in projection along surface normal at center [cm].
#       rot:  rotation angle of segment around its own axis (sq.+hex) [deg.]

# RINGsegments approximation for the SCT primary reflector,
# using the parameters from Table 3 of the TDR document (MAN-PO/120915).
# Updated to use mean radii of inner and outer edge of segments
# as calculated from spreadsheet 'Segments.xlsx' (2022-05-30).
# Gaps between segments adapted to 2*7 mm.

# Inner ring:
# RING 16 219.35 340.00 22.5 0 0.0 # No gaps