Warning, /epic/compact/central_beampipe.xml is written in an unsupported language. File is not indexed.
0001 <!-- SPDX-License-Identifier: LGPL-3.0-or-later -->
0002 <!-- Copyright (C) 2022 Wouter Deconinck, Whitney Armstrong -->
0003
0004 <lccdd>
0005 <define>
0006 <constant name="BeampipeUpstreamStraightLength" value="800.0 * mm"/>
0007 <constant name="BeampipeDownstreamStraightLength" value="670.0 * mm"/>
0008 </define>
0009
0010 <display>
0011 </display>
0012
0013 <detectors>
0014
0015 <detector id="BeamPipe_ID" name="BeamPipe" type="IP6BeamPipe" vis="BeamPipeVis">
0016 <type_flags type="DetType_TRACKER + DetType_BEAMPIPE" />
0017 <beampipe/>
0018 <IP_pipe
0019 OD="BeampipeOD"
0020 wall_thickness="0.757*mm"
0021 gold_thickness="5*um"
0022 crossing_angle="CrossingAngle"
0023 upstream_straight_length="BeampipeUpstreamStraightLength"
0024 downstream_straight_length="BeampipeDownstreamStraightLength"
0025 />
0026
0027 <comment> For upstream beampipe, we subtract the vacuum from the matter </comment>
0028 <upstream reflect="true"
0029 place_vacuum="true"
0030 subtract_vacuum="true"
0031 subtract_matter="false">
0032 <outgoing_lepton thickness="2.0*mm">
0033 <zplane z="BeampipeUpstreamStraightLength" OD="BeampipeOD"/>
0034 <zplane z="2690.95 * mm" OD="85.616 * mm"/>
0035 <zplane z="4560.17 * mm" OD="99.20 * mm"/>
0036 </outgoing_lepton>
0037 <incoming_hadron thickness="1.65*mm"
0038 crossing_angle="CrossingAngle">
0039 <!-- avoid overlap with IP beampipe by starting slightly displaced -->
0040 <zplane z="BeampipeUpstreamStraightLength + 0.5 * max(BeampipeOD, 24.714 * mm) * tan(abs(CrossingAngle))" OD="24.714 * mm"/>
0041 <zplane z="2690.95 * mm" OD="24.714 * mm"/>
0042 <zplane z="2710.75 * mm" OD="31.75 * mm"/>
0043 <zplane z="2890.35 * mm" OD="31.75 * mm"/>
0044 <zplane z="2940.35 * mm" OD="44.45 * mm"/>
0045 <zplane z="4490.35 * mm" OD="44.45 * mm"/>
0046 </incoming_hadron>
0047 </upstream>
0048
0049 <comment> For downstream beampipe (where on is inside the vacuum of the other), we subtract the matter from the vacuum, and subtract an additional pipe to create the angled cutout</comment>
0050 <downstream reflect="false"
0051 place_vacuum="true"
0052 subtract_vacuum="false"
0053 subtract_matter="true">
0054 <incoming_lepton thickness="1.0*mm">
0055 <zplane z="BeampipeDownstreamStraightLength" OD="BeampipeOD"/>
0056 <zplane z="4484.25 * mm" OD="BeampipeOD"/>
0057 </incoming_lepton>
0058 <outgoing_hadron thickness="4.0*mm"
0059 axis_intersection="670.0 * mm"
0060 crossing_angle="CrossingAngle">
0061 <!-- avoid overlap with IP beampipe by starting slightly displaced -->
0062 <zplane z="BeampipeDownstreamStraightLength + 0.5 * BeampipeOD * tan(abs(CrossingAngle))" OD="BeampipeOD"/>
0063 <zplane z="1750.00 * mm" OD=" 92.06 * mm"/>
0064 <zplane z="4455.80 * mm" OD="257.92 * mm"/>
0065 <!-- removed due to vacuum overlap with far forward electron beampipe -->
0066 <!--zplane z="5000.00 * mm" OD="340.60 * mm"/-->
0067 </outgoing_hadron>
0068 <additional_subtraction thickness="4.0*mm"
0069 crossing_angle="CrossingAngle">
0070 <!-- these are somewhat arbitrary to get the right hole shape -->
0071 <zplane z="BeampipeDownstreamStraightLength" OD="32. * mm"/>
0072 <zplane z="4484.25 * mm" OD="120. * mm"/>
0073 </additional_subtraction>
0074 </downstream>
0075 </detector>
0076
0077 </detectors>
0078
0079
0080 </lccdd>
