diff --git a/compact/central_tracker.xml b/compact/central_tracker.xml
index e3b33bab807af3c0dcd5d3e8da80f821fa92e5e9..bef580d8aee42710ee1e86db817a38e552b84a9e 100644
--- a/compact/central_tracker.xml
+++ b/compact/central_tracker.xml
@@ -12,27 +12,39 @@
Note: initial implementation with hard-coded values,
TODO: add parametrization
- </comment>
- <define>
+ ----
+ Aug 04, 2021, Shujie Li
+
+ udpated stave material budget for the baseline design.
+ see https://eicweb.phy.anl.gov/EIC/detectors/athena/-/issues/63
+
+ ITS3 sensor thickness: 40um, pixel size: 10um (segmentation)
+ total X0 0.55% per layer:
+ 0.4 mm aluminum ~ 0.44% X0.
+ 2 x carbonfiber (RL ~ 25) 0.1 mm to match Si (RL~9) of 0.04mm
- <constant name="TrackerBarrelSpaceFrame_width" value="4.0*cm"/>
- <constant name="TrackerBarrelSpaceFrame_height" value="2.5*cm"/>
- <constant name="TrackerSensor_thickness" value="0.03*mm"/>
- <constant name="TrackerBarrel_thickness" value="0.55/100*9.37*cm"/>
- <constant name="TrackerBarrelService_thickness" value="TrackerBarrel_thickness-TrackerSensor_thickness"/>
+ </comment>
+ <define>
<comment>
Layer_rOffset is used to add inside space so the _rmin value is the nominal sensor radius.
+ TrackerBarrelSpaceFrame_height must be smaller than {_rmin2 - _rmin1 - Layer_rOffset - 1mm - stave_thickness}
</comment>
+
<constant name="TrackerBarrelLayer_rOffset" value="0.5*cm"/>
- <constant name="TrackerBarrelInner_rmin1" value="21.0*cm"/>
- <constant name="TrackerBarrelInner_rmin2" value="TrackerBarrelInner_rmin1 + TrackerBarrelSpaceFrame_width"/>
+ <constant name="TrackerBarrelSpaceFrame_width" value="4.0*cm"/>
+ <constant name="TrackerBarrelSpaceFrame_height" value="1.0835*cm"/>
+ <constant name="TrackerSensor_thickness" value="0.04*mm"/>
+
+ <constant name="TrackerBarrelInner_rmin1" value="21.0*cm"/>
+ <constant name="TrackerBarrelInner_rmin2" value="22.68*cm"/>
<constant name="TrackerBarrelInner_length1" value="54.0*cm"/>
<constant name="TrackerBarrelInner_length2" value="60.0*cm"/>
<constant name="TrackerBarrelOuter_rmin1" value="39.3*cm"/>
- <constant name="TrackerBarrelOuter_rmin2" value="TrackerBarrelOuter_rmin1 + TrackerBarrelSpaceFrame_width"/>
+ <constant name="TrackerBarrelOuter_rmin2" value="43.23*cm"/>
+
<constant name="TrackerBarrelOuter_length1" value="105.0*cm"/>
<constant name="TrackerBarrelOuter_length2" value="114.0*cm"/>
@@ -46,8 +58,8 @@
<comment>
Here we are assuming the two endcaps (P and N) are symmetric.
</comment>
- <constant name="TrackerEndcap_thickness" value="0.25/100*9.37*cm"/>
- <constant name="TrackerEndcapService_thickness" value="TrackerEndcap_thickness-TrackerSensor_thickness"/>
+ <!-- <constant name="TrackerEndcap_thickness" value="0.24/100*9.37*cm"/> -->
+ <!-- <constant name="TrackerEndcapService_thickness" value="TrackerEndcap_thickness-TrackerSensor_thickness"/> -->
<constant name="TrackerEndcapInner_nLayers" value="1"/>
<constant name="TrackerEndcapOuter_nLayers" value="3"/>
@@ -69,14 +81,14 @@
This is a limitation of ACTS geometry which will likely go away in the future.</comment>
<constant name="TrackerEndcapInner_rmin1" value="Beampipe_rmax+1.0*cm"/>
- <constant name="TrackerEndcapInner_rmin2" value="Beampipe_rmax+1.0*cm"/>
+ <!-- <constant name="TrackerEndcapInner_rmin2" value="Beampipe_rmax+1.0*cm"/> -->
<constant name="TrackerEndcapOuter_rmin1" value="3.18*cm + 1.2*cm * 1"/>
<constant name="TrackerEndcapOuter_rmin2" value="3.18*cm + 1.2*cm * 1"/>
<constant name="TrackerEndcapOuter_rmin3" value="3.18*cm + 1.2*cm * 2"/>
<constant name="TrackerEndcapInner_rmax1" value="TrackerBarrelOuter_rmin1-5.0*mm"/>
- <constant name="TrackerEndcapInner_rmax2" value="TrackerBarrelOuter_rmin1-5.0*mm"/>
+ <!-- <constant name="TrackerEndcapInner_rmax2" value="TrackerBarrelOuter_rmin1-5.0*mm"/> -->
<constant name="TrackerEndcapOuter_rmax1" value="43.23*cm"/>
<constant name="TrackerEndcapOuter_rmax2" value="43.23*cm"/>
@@ -124,7 +136,7 @@
insideTrackingVolume="true">
<dimensions
rmin="TrackerBarrelInner_rmin1-TrackerBarrelLayer_rOffset"
- rmax="TrackerBarrelInner_rmin2-TrackerBarrelLayer_rOffset + TrackerBarrelInner_thickness"
+ rmax="TrackerBarrelInner_rmin2-TrackerBarrelLayer_rOffset + TrackerBarrelInner_thickness"
length="TrackerBarrelInner_length"/>
<comment>
Tracker Barrel Modules
@@ -135,15 +147,13 @@
height="TrackerBarrelSpaceFrame_height"
length="TrackerBarrelInner_length1"
thickness="0.1*mm" />
- <module_component name="peek1" material="PEEK" sensitive="false"
- width="TrackerBarrelSpaceFrame_width" length="TrackerBarrelInner_length1-4*mm" thickness="2.0*mm" />
+ <module_component name="aluminum1" material="Aluminum" sensitive="false"
+ width="TrackerBarrelSpaceFrame_width" length="TrackerBarrelInner_length1-4*mm" thickness="0.4*mm" />
<module_component name="silicon"
width="TrackerBarrelSpaceFrame_width"
- length="TrackerBarrelInner_length1-5*mm" thickness="0.05*mm" material="Silicon" sensitive="true">
+ length="TrackerBarrelInner_length1-5*mm" thickness="TrackerSensor_thickness" material="Silicon" sensitive="true">
<!--position z="-0.025*mm" y="0*mm"/-->
</module_component>
- <module_component name="peek1" material="PEEK" sensitive="false"
- width="TrackerBarrelSpaceFrame_width" length="TrackerBarrelInner_length1-6*mm" thickness="2.0*mm" />
</module>
<module name="TrackerBarrelInner_Module2" vis="TrackerModuleVis">
<frame material="CarbonFiber_25percent" vis="TrackerSupportVis"
@@ -151,15 +161,13 @@
height="TrackerBarrelSpaceFrame_height"
length="TrackerBarrelInner_length2"
thickness="0.1*mm" />
- <module_component name="peek1" material="PEEK" sensitive="false"
- width="TrackerBarrelSpaceFrame_width" length="TrackerBarrelInner_length2-4*mm" thickness="2.0*mm" />
+ <module_component name="aluminum1" material="Aluminum" sensitive="false"
+ width="TrackerBarrelSpaceFrame_width" length="TrackerBarrelInner_length2-4*mm" thickness="0.4*mm" />
<module_component name="silicon"
width="TrackerBarrelSpaceFrame_width"
- length="TrackerBarrelInner_length2-5*mm" thickness="0.05*mm" material="Silicon" sensitive="true">
+ length="TrackerBarrelInner_length2-5*mm" thickness="TrackerSensor_thickness" material="Silicon" sensitive="true">
<!--position z="-0.025*mm" y="0*mm"/-->
</module_component>
- <module_component name="peek1" material="PEEK" sensitive="false"
- width="TrackerBarrelSpaceFrame_width" length="TrackerBarrelInner_length2-6*mm" thickness="2.0*mm" />
</module>
<comment>
Tracker Barrel Inner Layers
@@ -197,7 +205,7 @@
<layer id="1">
<envelope vis="AnlRed"
rmin="TrackerEndcapInner_rmin1"
- rmax="TrackerEndcapInner_rmax2"
+ rmax="TrackerEndcapInner_rmax1"
length="TrackerEndcapInnerLayer_dz"
zstart="TrackerEndcapInner_zmin" />
<ring vis="AnlRed"
@@ -222,7 +230,7 @@
<layer id="1">
<envelope vis="AnlRed"
rmin="TrackerEndcapInner_rmin1"
- rmax="TrackerEndcapInner_rmax2"
+ rmax="TrackerEndcapInner_rmax1"
length="TrackerEndcapInnerLayer_dz"
zstart="TrackerEndcapInner_zmin" />
<ring vis="AnlRed"
@@ -256,15 +264,13 @@
height="TrackerBarrelSpaceFrame_height"
length="TrackerBarrelOuter_length1"
thickness="0.1*mm" />
- <module_component name="peek1" material="PEEK" sensitive="false"
- width="TrackerBarrelSpaceFrame_width" length="TrackerBarrelOuter_length1-0.1*mm" thickness="2.0*mm" />
+ <module_component name="aluminum1" material="Aluminum" sensitive="false"
+ width="TrackerBarrelSpaceFrame_width" length="TrackerBarrelOuter_length1-0.1*mm" thickness="0.40*mm" />
<module_component name="silicon"
width="TrackerBarrelSpaceFrame_width"
length="TrackerBarrelOuter_length1-0.1*mm"
- thickness="0.05*mm" material="Silicon" sensitive="true">
+ thickness="TrackerSensor_thickness" material="Silicon" sensitive="true">
</module_component>
- <module_component name="peek2" material="PEEK" sensitive="false"
- width="TrackerBarrelSpaceFrame_width" length="TrackerBarrelOuter_length1-0.1*mm" thickness="2.0*mm" />
</module>
<module name="TrackerBarrelOuter_Module2" vis="PurpleVis">
<frame material="CarbonFiber_25percent" vis="BlueGreenVis"
@@ -272,15 +278,13 @@
height="TrackerBarrelSpaceFrame_height"
length="TrackerBarrelOuter_length2"
thickness="0.1*mm" />
- <module_component name="peek1" material="PEEK" sensitive="false"
- width="TrackerBarrelSpaceFrame_width" length="TrackerBarrelOuter_length2-0.1*mm" thickness="2.0*mm" />
+ <module_component name="aluminum1" material="Aluminum" sensitive="false"
+ width="TrackerBarrelSpaceFrame_width" length="TrackerBarrelOuter_length2-0.1*mm" thickness="0.40*mm" />
<module_component name="silicon"
width="TrackerBarrelSpaceFrame_width"
length="TrackerBarrelOuter_length1-0.1*mm"
- thickness="0.05*mm" material="Silicon" sensitive="true">
+ thickness="TrackerSensor_thickness" material="Silicon" sensitive="true">
</module_component>
- <module_component name="peek2" material="PEEK" sensitive="false"
- width="TrackerBarrelSpaceFrame_width" length="TrackerBarrelOuter_length1-0.1*mm" thickness="2.0*mm" />
</module>
<comment>
Tracker Barrel Inner Layers
@@ -421,12 +425,14 @@
<readouts>
<readout name="TrackerBarrelHits">
- <segmentation type="CartesianGridXY" grid_size_x="0.150*mm" grid_size_y="0.150*mm" />
+ <segmentation type="CartesianGridXY" grid_size_x="0.010*mm" grid_size_y="0.010*mm" />
<id>system:8,barrel:2,layer:4,module:12,sensor:2,x:32:-16,y:-16</id>
</readout>
<readout name="TrackerEndcapHits">
- <segmentation type="CartesianGridXZ" grid_size_x="0.20*mm" grid_size_z="0.20*mm" />
+ <segmentation type="CartesianGridXZ" grid_size_x="0.010*mm" grid_size_z="0.010*mm" />
<id>system:8,barrel:2,layer:4,module:12,sensor:2,x:32:-16,z:-16</id>
+
+
</readout>
</readouts>