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New b0 ecal geo #788

Merged
merged 30 commits into from
Nov 14, 2024
Merged

New b0 ecal geo #788

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c7dd754
fix correct rotation
michael-pitt May 10, 2024
0018d13
updated geometry
michael-pitt May 10, 2024
7f1d76b
center B0ECAL around the hadron beampipe
michael-pitt May 10, 2024
a13f1bd
move B0ECAL forward by 15cm
michael-pitt May 10, 2024
aa8d87e
shift b0 had beampipe to x=-16cm
michael-pitt May 10, 2024
756cd96
increase inner radius of B0ECAL
michael-pitt May 10, 2024
8ec3d6b
B0ECAL optimize
michael-pitt May 10, 2024
ec0dbd2
B0ECAL optimize
michael-pitt May 10, 2024
8faf6bd
B0ECAL nominal_z=688cm
michael-pitt May 12, 2024
4a11f27
push B0ECAL back
michael-pitt Jul 9, 2024
32bea92
update geometry
michael-pitt Aug 20, 2024
61c8dd7
shift B0 detector
michael-pitt Aug 24, 2024
98643a0
Merge branch 'main' into New_B0ECAL_geo
michael-pitt Aug 24, 2024
561c161
Merge branch 'main' into New_B0ECAL_geo
michael-pitt Aug 24, 2024
e0b0b29
B0ECAL PWO
michael-pitt Aug 24, 2024
ad06125
B0ECAL fix
michael-pitt Aug 27, 2024
456573d
fix one crystal
michael-pitt Sep 17, 2024
be20747
restore 0.2mm shifts
michael-pitt Sep 21, 2024
4e9f9d9
Merge branch 'main' into New_B0ECAL_geo
michael-pitt Sep 26, 2024
ca78440
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Sep 29, 2024
8e8f9ff
remove overlap, update tracker+ECAL
michael-pitt Oct 14, 2024
67750ac
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Oct 14, 2024
e52d7c5
organize individual placements B0ECAL
michael-pitt Oct 14, 2024
660d5cb
add B0Window + fix const.
michael-pitt Oct 15, 2024
56160d0
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Oct 15, 2024
313484f
variable sized tracker layers
michael-pitt Oct 15, 2024
9acffff
Revert "variable sized tracker layers"
veprbl Nov 12, 2024
cb3f552
revert changes to B0 tracker
veprbl Nov 12, 2024
1f0a442
minor indentation nitpicks
veprbl Nov 12, 2024
1badc20
Merge remote-tracking branch 'origin/main' into New_B0ECAL_geo
veprbl Nov 12, 2024
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265 changes: 232 additions & 33 deletions compact/far_forward/B0_ECal.xml
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Original file line number Diff line number Diff line change
@@ -1,23 +1,50 @@
<!-- SPDX-License-Identifier: LGPL-3.0-or-later -->
<!-- Copyright (C) 2022 Sakib Rahman -->
<!-- Copyright (C) 2022 Sakib Rahman, Michal Sedaka -->

<lccdd>
<define>
<constant name="B0ECal_rotation" value="ionCrossingAngle"/>
<constant name="B0ECal_IP_distance" value="688*cm"/>
<constant name="B0ECal_IP_distance" value="702*cm"/>
<constant name="B0ECal_xcenter" value="B0ECal_IP_distance*sin(ionCrossingAngle)"/>
<constant name="B0ECal_zcenter" value="B0ECal_IP_distance*cos(ionCrossingAngle)"/>
<constant name="B0ECal_length" value="20*cm"/>
<constant name="B0ECal_CrystalModule_width" value="2*cm"/>
<constant name="B0ECal_CrystalModule_length" value="B0ECal_length"/>
<constant name="B0ECal_CrystalModule_length_a" value="B0ECal_length"/>
<constant name="B0ECal_CrystalModule_length_b" value="15*cm"/>
<constant name="B0ECal_CrystalModule_wrap" value="0.50*mm"/>
<constant name="B0ECal_packman_rmin" value="3.7*cm"/>
<constant name="B0ECal_packman_small_rmax" value="8*cm"/>
<constant name="B0ECal_packman_large_rmax" value="15*cm"/>
<constant name="B0ECal_packman_large_phimin" value="-120*deg"/>
<constant name="B0ECal_packman_large_phimax" value="120*deg"/>
<constant name="B0ECal_r_envelopeclearance" value="1*mm+(B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap)*sqrt(2)"/>
<constant name="B0ECal_phi_envelopeclearance" value="(3.0*(B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap)*sqrt(2))/B0ECal_packman_small_rmax"/>

<constant name="x1" value="-10.5*cm"/>
<constant name="x2" value="x1+B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap"/>
<constant name="x3" value="x2+B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap"/>
<constant name="x4" value="x3+B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap"/>
<constant name="x5" value="x4+B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap"/>
<constant name="x6" value="x5+B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap"/>
<constant name="x7" value="x6+B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap"/>
<constant name="x8" value="x7+B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap"/>
<constant name="x9" value="x8+B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap"/>
<constant name="x10" value="x9+B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap"/>
<constant name="x11" value="x10+B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap"/>
<constant name="x12" value="x11+B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap"/>

<constant name="y1" value="-14.7*cm"/>
<constant name="y2" value="y1+B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap"/>
<constant name="y3" value="y2+B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap"/>
<constant name="y4" value="y3+B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap"/>
<constant name="y5" value="y4+B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap"/>
<constant name="y6" value="y5+B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap"/>
<constant name="y7" value="y6+B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap"/>
<constant name="y8" value="y7+B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap"/>
<constant name="y9" value="y8+B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap"/>
<constant name="y10" value="y9+B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap"/>
<constant name="y11" value="y10+B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap"/>
<constant name="y12" value="y11+B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap"/>
<constant name="y13" value="y12+B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap"/>
<constant name="y14" value="y13+B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap"/>
<constant name="y15" value="y14+B0ECal_CrystalModule_width+2*B0ECal_CrystalModule_wrap"/>
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<constant name="z1" value="0*cm"/>
<constant name="z2" value="2.5*cm"/>

</define>

<detectors>
Expand All @@ -31,30 +58,202 @@
type="B0_ECAL"
readout="B0ECalHits">
<position x="B0ECal_xcenter" y="0" z="B0ECal_zcenter"/>
<rotation x="B0ECal_rotation" y="180*deg" z="0"/>
<rotation x="0" y="180*deg+B0ECal_rotation" z="0"/>
<placements>
<disk
rmin="B0ECal_packman_rmin"
rintermediate="B0ECal_packman_small_rmax"
rmax="B0ECal_packman_large_rmax"
phimin="B0ECal_packman_large_phimin"
phimax="B0ECal_packman_large_phimax"
envelope="false"
r_envelopeclearance="B0ECal_r_envelopeclearance"
phi_envelopeclearance="B0ECal_phi_envelopeclearance"
material="Vacuum"
sector="1">
<module
sizex="B0ECal_CrystalModule_width"
sizey="B0ECal_CrystalModule_width"
sizez="B0ECal_CrystalModule_length"
vis="GreenVis"
material="LYSO"/>
<wrapper
thickness="B0ECal_CrystalModule_wrap"
material="Epoxy"
vis="GrayVis"/>
</disk>
<individuals>
<module
id="1"
sizex="B0ECal_CrystalModule_width"
sizey="B0ECal_CrystalModule_width"
sizez="B0ECal_CrystalModule_length_a"
material="PbWO4"
vis="GreenVis"/>
<wrapper
thickness="B0ECal_CrystalModule_wrap"
material="Epoxy"
vis="GrayVis"/>
<placement id="1" x="x1" y="y15" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="2" x="x2" y="y15" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="3" x="x3" y="y15" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="4" x="x4" y="y15" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="5" x="x5" y="y15" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="6" x="x6" y="y15" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="7" x="x7" y="y15" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="8" x="x8" y="y15" z="z1" rotx="0." roty="0." rotz="0."/>

<placement id="9" x="x1" y="y14" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="10" x="x2" y="y14" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="11" x="x3" y="y14" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="12" x="x4" y="y14" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="13" x="x5" y="y14" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="14" x="x6" y="y14" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="15" x="x7" y="y14" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="16" x="x8" y="y14" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="17" x="x9" y="y14" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="18" x="x10" y="y14" z="z1" rotx="0." roty="0." rotz="0."/>

<placement id="19" x="x1" y="y13" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="20" x="x2" y="y13" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="21" x="x3" y="y13" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="22" x="x4" y="y13" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="23" x="x5" y="y13" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="24" x="x6" y="y13" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="25" x="x7" y="y13" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="26" x="x8" y="y13" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="27" x="x9" y="y13" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="28" x="x10" y="y13" z="z1" rotx="0." roty="0." rotz="0."/>


<!-- <placement id="29" x="x2" y="y12" z="z1" rotx="0." roty="0." rotz="0."/> -->
<placement id="30" x="x3" y="y12" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="31" x="x4" y="y12" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="32" x="x5" y="y12" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="33" x="x6" y="y12" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="34" x="x7" y="y12" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="35" x="x8" y="y12" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="36" x="x9" y="y12" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="37" x="x10" y="y12" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="38" x="x11" y="y12" z="z1" rotx="0." roty="0." rotz="0."/>

<placement id="39" x="x3" y="y11" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="40" x="x4" y="y11" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="41" x="x5" y="y11" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="42" x="x6" y="y11" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="43" x="x7" y="y11" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="44" x="x8" y="y11" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="45" x="x9" y="y11" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="46" x="x10" y="y11" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="47" x="x11" y="y11" z="z1" rotx="0." roty="0." rotz="0."/>

<placement id="48" x="x3" y="y10" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="49" x="x4" y="y10" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="50" x="x5" y="y10" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="51" x="x6" y="y10" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="52" x="x7" y="y10" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="53" x="x8" y="y10" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="54" x="x9" y="y10" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="55" x="x10" y="y10" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="56" x="x11" y="y10" z="z1" rotx="0." roty="0." rotz="0."/>


<!-- <placement id="57" x="x2" y="y9" z="z1" rotx="0." roty="0." rotz="0."/> -->
<placement id="58" x="x3" y="y9" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="59" x="x4" y="y9" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="60" x="x8" y="y9" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="61" x="x9" y="y9" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="62" x="x10" y="y9" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="63" x="x11" y="y9" z="z1" rotx="0." roty="0." rotz="0."/>


<!-- <placement id="64" x="x2" y="y8" z="z1" rotx="0." roty="0." rotz="0."/> -->
<placement id="65" x="x3" y="y8" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="66" x="x4" y="y8" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="67" x="x8" y="y8" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="68" x="x9" y="y8" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="69" x="x10" y="y8" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="70" x="x11" y="y8" z="z1" rotx="0." roty="0." rotz="0."/>


<!-- <placement id="71" x="x2" y="y7" z="z1" rotx="0." roty="0." rotz="0."/> -->
<placement id="72" x="x3" y="y7" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="73" x="x4" y="y7" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="74" x="x8" y="y7" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="75" x="x9" y="y7" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="76" x="x10" y="y7" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="77" x="x11" y="y7" z="z1" rotx="0." roty="0." rotz="0."/>


<!-- <placement id="78" x="x2" y="y6" z="z1" rotx="0." roty="0." rotz="0."/> -->
<placement id="79" x="x3" y="y6" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="80" x="x4" y="y6" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="81" x="x5" y="y6" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="82" x="x6" y="y6" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="83" x="x7" y="y6" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="84" x="x8" y="y6" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="85" x="x9" y="y6" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="86" x="x10" y="y6" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="87" x="x11" y="y6" z="z1" rotx="0." roty="0." rotz="0."/>


<!-- <placement id="88" x="x2" y="y5" z="z1" rotx="0." roty="0." rotz="0."/> -->
<placement id="89" x="x3" y="y5" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="90" x="x4" y="y5" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="91" x="x5" y="y5" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="92" x="x6" y="y5" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="93" x="x7" y="y5" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="94" x="x8" y="y5" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="95" x="x9" y="y5" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="96" x="x10" y="y5" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="97" x="x11" y="y5" z="z1" rotx="0." roty="0." rotz="0."/>

<!-- <placement id="81" x="x2" y="y4" z="z1" rotx="0." roty="0." rotz="0."/> -->
<placement id="98" x="x3" y="y4" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="99" x="x4" y="y4" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="100" x="x5" y="y4" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="101" x="x6" y="y4" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="102" x="x7" y="y4" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="103" x="x8" y="y4" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="104" x="x9" y="y4" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="105" x="x10" y="y4" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="106" x="x11" y="y4" z="z1" rotx="0." roty="0." rotz="0."/>

<placement id="107" x="x1" y="y3" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="108" x="x2" y="y3" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="109" x="x3" y="y3" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="110" x="x4" y="y3" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="111" x="x5" y="y3" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="112" x="x6" y="y3" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="113" x="x7" y="y3" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="114" x="x8" y="y3" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="115" x="x9" y="y3" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="116" x="x10" y="y3" z="z1" rotx="0." roty="0." rotz="0."/>


<placement id="118" x="x1" y="y2" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="119" x="x2" y="y2" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="120" x="x3" y="y2" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="121" x="x4" y="y2" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="122" x="x5" y="y2" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="123" x="x6" y="y2" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="124" x="x7" y="y2" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="125" x="x8" y="y2" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="126" x="x9" y="y2" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="127" x="x10" y="y2" z="z1" rotx="0." roty="0." rotz="0."/>

<placement id="128" x="x1" y="y1" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="129" x="x2" y="y1" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="130" x="x3" y="y1" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="131" x="x4" y="y1" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="132" x="x5" y="y1" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="133" x="x6" y="y1" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="134" x="x7" y="y1" z="z1" rotx="0." roty="0." rotz="0."/>
<placement id="135" x="x8" y="y1" z="z1" rotx="0." roty="0." rotz="0."/>

</individuals>
<individuals>
<module
id="2"
sizex="B0ECal_CrystalModule_width"
sizey="B0ECal_CrystalModule_width"
sizez="B0ECal_CrystalModule_length_b"
material="LYSO"
vis="GreenVis"/>

<wrapper
thickness="B0ECal_CrystalModule_wrap"
material="Epoxy"
vis="GrayVis"/>

<placement id="29" x="x11" y="y13" z="z2" rotx="0." roty="0." rotz="0."/>
<placement id="57" x="x12" y="y10" z="z2" rotx="0." roty="0." rotz="0."/>
<placement id="64" x="x12" y="y9" z="z2" rotx="0." roty="0." rotz="0."/>
<placement id="71" x="x12" y="y8" z="z2" rotx="0." roty="0." rotz="0."/>
<placement id="78" x="x12" y="y7" z="z2" rotx="0." roty="0." rotz="0."/>
<placement id="88" x="x12" y="y6" z="z2" rotx="0." roty="0." rotz="0."/>
<placement id="117" x="x11" y="y3" z="z2" rotx="0." roty="0." rotz="0."/>

</individuals>

</placements>

</detector>
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7 changes: 4 additions & 3 deletions compact/far_forward/B0_tracker.xml
View file
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Original file line number Diff line number Diff line change
Expand Up @@ -12,10 +12,11 @@
- I start from the downstream side of the B0 magnet and an arbitrary offset
which puts the downstream of the detector 10cm from the end of the magnet.
</comment>
<constant name="B0Tracker_length" value="81.0*cm"/>
<constant name="B0Tracker_length" value="102.0*cm"/>
<constant name="B0Tracker_IP_distance" value="639*cm"/>
<constant name="B0Tracker_zoffset" value="5.0*cm"/>
<constant name="B0TrackerCenter_zpos" value="6.3*m"/>
<constant name="B0TrackerCenter_xpos" value="-0.16000052*m" />
<constant name="B0TrackerCenter_zpos" value="B0Tracker_IP_distance*cos(ionCrossingAngle)"/>
<constant name="B0TrackerCenter_xpos" value="B0Tracker_IP_distance*sin(ionCrossingAngle)" />
<constant name="B0Tracker_zmin" value="B0TrackerCenter_zpos - B0Tracker_length/2.0 "/>
<constant name="B0Tracker_rotation" value="ionCrossingAngle"/>
<comment>
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