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'''
A script to calcualte placement of ecal endcap modules
lxml is not included in container, get it by simply typing 'pip install lxml'
Author: Chao Peng (ANL)
Date: 06/17/2021
'''
import numpy as np
import argparse
from lxml import etree as ET
# start pos, total number of blocks
CRYSTAL_ALIGNMENT = [
(8, 17),
(8, 17),
(8, 17),
(7, 18),
(7, 18),
(6, 19),
(4, 19),
(1, 22),
(1, 22),
(1, 22),
(1, 22),
(1, 22),
(1, 20),
(1, 20),
(1, 18),
(1, 18),
(1, 16),
(1, 16),
(1, 14),
(1, 14),
(1, 12),
(1, 12),
(1, 6),
(1, 6),
]
GLASS_ALIGNMENT = [
(13, 11),
(13, 11),
(13, 11),
(12, 12),
(12, 12),
(12, 12),
(11, 12),
(10, 13),
(9, 13),
(8, 14),
(7, 14),
(4, 16),
(1, 19),
(1, 18),
(1, 18),
(1, 17),
(1, 17),
(1, 15),
(1, 13),
(1, 11),
(1, 10),
(1, 8),
(1, 6),
]
# calculate positions of modules with a quad-alignment and module size
def individual_placement(alignment, module_x=20.5, module_y=20.5):
placements = []
for row, (start, num) in enumerate(alignment):
for col in np.arange(start - 1, start + num - 1):
placements.append(((col + 0.5)*module_y, (row + 0.5)*module_x))
placements = np.asarray(placements)
return np.vstack((placements,
np.vstack((placements.T[0]*-1., placements.T[1])).T,
np.vstack((placements.T[0], placements.T[1]*-1.)).T,
np.vstack((placements.T[0]*-1., placements.T[1]*-1.)).T))
if __name__ == '__main__':
parser = argparse.ArgumentParser()
parser.add_argument('-s', '--save', default='compact/ce_ecal_crystal_glass.xml',
help='path to save compact file.')
args = parser.parse_args()
data = ET.Element('lccdd')
defines = ET.SubElement(data, 'define')
# constants: name, value
consts = [
('CrystalModule_sx', '20.0*mm'),
('CrystalModule_sy', '20.0*mm'),
('CrystalModule_sz', '20.0*cm'),
('CrystalModule_wrap', '0.5*mm'),
('CrystalModule_dz', '-8*cm'),
('GlassModule_sx', '40.0*mm'),
('GlassModule_sy', '40.0*mm'),
('GlassModule_sz', '40.0*cm'),
('GlassModule_dz', '0.0*cm'),
('GlassModule_wrap', '1.0*mm'),
('EcalEndcapN_z0', '-EcalEndcapN_zmin-max(CrystalModule_sz,GlassModule_sz)/2.'),
]
for name, value in consts:
constant = ET.SubElement(defines, 'constant')
constant.set('name', name)
constant.set('value', value)
# this value will be used multiple times, so define it here
readout_name = 'EcalEndcapNHits'
# detector and its dimension/position/rotation
dets = ET.SubElement(data, 'detectors')
cmt = ET.SubElement(dets, 'comment')
cmt.text = ' Backwards Endcap EM Calorimeter, placements generated by script '
det = ET.SubElement(dets, 'detector')
det.set('id', 'ECalEndcapN_ID')
det.set('name', 'EcalEndcapN')
det.set('type', 'HomogeneousCalorimeter')
det.set('readout', readout_name)
pos = ET.SubElement(det, 'position')
pos.set('x', '0')
pos.set('y', '0')
pos.set('z', 'EcalEndcapN_z0')
rot = ET.SubElement(det, 'rotation')
rot.set('x', '0')
rot.set('y', '0')
rot.set('z', '0')
# placements of modules
plm = ET.SubElement(det, 'placements')
# crystals
# crystal = ET.SubElement(plm, 'individuals')
crystal = ET.SubElement(plm, 'lines')
crystal.set('sector', '1')
crystal_mod = ET.SubElement(crystal, 'module')
crystal_mod.set('sizex', 'CrystalModule_sx')
crystal_mod.set('sizey', 'CrystalModule_sy')
crystal_mod.set('sizez', 'CrystalModule_sz')
crystal_mod.set('material', 'PbWO4')
crystal_mod.set('vis', 'AnlTeal')
crystal_wrap = ET.SubElement(crystal, 'wrapper')
crystal_wrap.set('thickness', 'CrystalModule_wrap')
crystal_wrap.set('material', 'Epoxy')
crystal_wrap.set('vis', 'WhiteVis')
crystal_pos = ET.SubElement(crystal, 'position')
crystal_pos.set('z', 'CrystalModule_dz')
# crystal placements (for individuals)
# for m, (x, y) in enumerate(individual_placement(CRYSTAL_ALIGNMENT)):
# module = ET.SubElement(crystal, 'placement')
# module.set('x', '{:.3f}*mm'.format(x))
# module.set('y', '{:.3f}*mm'.format(y))
# module.set('z', '0')
# module.set('id', '{:d}'.format(m))
# crystal placements (for lines)
crystal.set('mirrorx', 'true')
crystal.set('mirrory', 'true')
for row, (begin, nmods) in enumerate(CRYSTAL_ALIGNMENT):
line = ET.SubElement(crystal, 'line')
line.set('x', '(CrystalModule_sx + CrystalModule_wrap)/2.')
line.set('y', '(CrystalModule_sy + CrystalModule_wrap)*{:d}/2.'.format(row*2 + 1))
line.set('begin', '{:d}'.format(begin - 1))
line.set('nmods', '{:d}'.format(nmods))
# glass
# glass = ET.SubElement(plm, 'individuals')
glass = ET.SubElement(plm, 'lines')
glass.set('sector', '2')
glass_mod = ET.SubElement(glass, 'module')
glass_mod.set('sizex', 'GlassModule_sx')
glass_mod.set('sizey', 'GlassModule_sy')
glass_mod.set('sizez', 'GlassModule_sz')
# TODO: change glass material
glass_mod.set('material', 'PbGlass')
glass_mod.set('vis', 'AnlBlue')
glass_wrap = ET.SubElement(glass, 'wrapper')
glass_wrap.set('thickness', 'GlassModule_wrap')
glass_wrap.set('material', 'Epoxy')
glass_wrap.set('vis', 'WhiteVis')
glass_pos = ET.SubElement(glass, 'position')
glass_pos.set('z', 'GlassModule_dz')
# crystal placements (for individuals)
# for m, (x, y) in enumerate(individual_placement(GLASS_ALIGNMENT, 41.0, 41.0)):
# module = ET.SubElement(glass, 'placement')
# module.set('x', '{:.3f}*mm'.format(x))
# module.set('y', '{:.3f}*mm'.format(y))
# module.set('z', '0')
# module.set('id', '{:d}'.format(m))
# crystal placements (for lines)
glass.set('mirrorx', 'true')
glass.set('mirrory', 'true')
for row, (begin, nmods) in enumerate(GLASS_ALIGNMENT):
line = ET.SubElement(glass, 'line')
line.set('x', '(GlassModule_sx + GlassModule_wrap)/2.')
line.set('y', '(GlassModule_sy + GlassModule_wrap)*{:d}/2.'.format(row*2 + 1))
line.set('begin', '{:d}'.format(begin - 1))
line.set('nmods', '{:d}'.format(nmods))
# readout
readouts = ET.SubElement(data, 'readouts')
cmt = ET.SubElement(readouts, 'comment')
cmt.text = 'Effectively no segmentation, the segmentation is used to provide cell dimension info'
readout = ET.SubElement(readouts, 'readout')
readout.set('name', readout_name)
seg = ET.SubElement(readout, 'segmentation')
# need segmentation to provide cell dimension info
# seg.set('type', 'NoSegmentation')
seg.set('type', 'MultiSegmentation')
seg.set('key', 'sector')
crystal_seg = ET.SubElement(seg, 'segmentation')
crystal_seg.set('name', 'CrystalSeg')
crystal_seg.set('key_value', '1')
crystal_seg.set('type', 'CartesianGridXY')
crystal_seg.set('grid_size_x', 'CrystalModule_sx + CrystalModule_wrap')
crystal_seg.set('grid_size_y', 'CrystalModule_sy + CrystalModule_wrap')
glass_seg = ET.SubElement(seg, 'segmentation')
glass_seg.set('name', 'GlassSeg')
glass_seg.set('key_value', '2')
glass_seg.set('type', 'CartesianGridXY')
glass_seg.set('grid_size_x', 'GlassModule_sx + GlassModule_wrap')
glass_seg.set('grid_size_y', 'GlassModule_sy + GlassModule_wrap')
rid = ET.SubElement(readout, 'id')
rid.text = 'system:8,sector:4,module:20,x:32:-16,y:-16'
text = ET.tostring(data, pretty_print=True)
with open(args.save, 'wb') as f:
f.write(text)