Omveer_Singh authored Apr 16, 2021 and Florian Uhlig committed Apr 16, 2021

Implementation of realistic geometry, gas mixture and material budget for GEM chambers in jpsi setup.
Add new media definitions.

Add correct composition for steel used in beampipe for mCBM.

Source: Acidur 4301 Werkstoffdatenblatt X5CrNi18-10 1.4301

Refs #1735 @15m

Philipp Klaus authored Apr 20, 2020 and Florian Uhlig committed Apr 23, 2020

Variants:

* v20a: stations at old location but all changes reported below in
* v20b: as v20a, but TPG carrier thickness increased to
  500 µm, all stations moved upstream by 4cm.
* v20c: as v20a but moved upstream by 4cm.

Detailed changes in those new geometries are:

* Position of the MVD moved 4cm upstream (v20b & v20c),
* TPG carriers' thickness updated (from 300 µm in v17 to 380 µm [500 µm]),
* MVD specifc custom materials defined in media.geo (TPG, diamond, glue, fpc),
* CVD diamond only used for first station on VX version,
* transformation matrix added to the ROOT output file
  placing the detector in the CBM coordinate system,
* addition of a top and bottom mounting plate of 10mm aluminium,
* vertical aluminium heatsinks' thickness increased by 3mm to mock
  the expected material from FEBs that will be mounted on top of them.