Draft: Implementation of the concentric layout with square shape chips.

Implementation of concentric layout with trapezoid sensors, outer pipe and new substrate for velo upgrade 2.

Overview of current implementation

Changes:

Concentric layout of sensors around the beam pipe.

1. Sensors forming inner and outer rings, at different z-positions. Number of sensor numbers the same.
2. The distance between the innermost (& outermost) row of pixels to the center is kept the same.

Concentric layout with square and trapezoid sensors

Trapezoid sensor

1. Only for the sensor. The chip, bump bond and glue remain square.
2. Parameters: height 15.910mm, lower_base 19.134mm, upper_base 5.954mm

Parameters derivation

Update procedure of the "ladder"

Substrate shapes changed for concentric layout.

1. The offset of substrate to chip's innermost edge is kept the same. (doesn't seem so on the plots?)

Updated substrate

An outer pipe at r=18mm. To place inner ring of sensors, some slices are needed.

Outer pipe with slices

To-dos:

1. Small fixes:

• The design should be selected by a parameter in xml. But currently the Detector/TV/src/TV_geo.cpp in CMakeLists is overwritten.
• Naming of some of the volumes should be corrected (like ladder)

2. Optimize position parameters of sensor, chip, substrate...
3. Parameterization?

---

Validated by

• Core Software
• RTA
• Simulation

Core/src/GeometryChecker.cpp

@@ -284,7 +284,7 @@ DECLARE_APPLY( density_slice, tgeo_get_slice )
  * Simple plugin that dumps the capacity, density and mass of each volume in the volume tree
  * e.g. by doing:
  *
- * geoPluginRun -input compact/run3/trunk/debug/VP_debug.xml -plugin dump_volume_masses
+ * geoPluginRun -input compact/components/debug/VP_debug.xml -plugin dump_volume_masses
  *
  * This is intended to be used as an interactive tool to aid geometry development, rather than being used in automated
  * tests
@@ -349,7 +349,7 @@ DECLARE_APPLY( dump_volume_masses, tgeo_dump_masses )
  *
  * Example usage:
  *
- * geoPluginRun -input compact/run3/trunk/debug/VP_debug.xml -plugin rad_scan -150.0 -150.0 -7.0 150.0 150.0 -4.0, 300
+ * geoPluginRun -input compact/components/debug/VP_debug.xml -plugin rad_scan -150.0 -150.0 -7.0 150.0 150.0 -4.0, 300
  *
  * will do a scan in x (300 points from -150mm to 150mm) vs y (300 points from -150mm to 150mm) between z = -7mm and
  * -4mm
@@ -643,7 +643,7 @@ DECLARE_APPLY( rad_scan, tgeo_rad_scan )
  *
  * Example usage:
  *
- * geoPluginRun -input compact/run3/trunk/LHCb.xml -plugin rad_scan_etaphi 0 200 835 978 2250 2750 7670 8350 9040 9420
+ * geoPluginRun -input compact/components/LHCb.xml -plugin rad_scan_etaphi 0 200 835 978 2250 2750 7670 8350 9040 9420
  * 11920 12280
  *
  * will do a non-verbose scan in eta (200 points from 1.5 to 5.0) vs phi (200 points from -180 deg to 180 deg) in
@@ -878,7 +878,7 @@ namespace {
  *
  * Example usage:
  *
- * geoPluginRun -input compact/run3/trunk/debug/VP_debug.xml -plugin rad_scan_etaphi_velo 300 360 290 835 100 1 0
+ * geoPluginRun -input compact/components/debug/VP_debug.xml -plugin rad_scan_etaphi_velo 300 360 290 835 100 1 0
  *
  * will do a scan in eta (300 points from 2.0 to 5.0) vs phi (360 points from -180 deg to 180 deg),
  * until reaching a maximum radius of 290mm or a maximum total distance of 835mm,