STS geometries version v21e, v21f and v21g

v21f: STS geometry is similar to the version v21b. The target position considered from -4 cm. The geometry can be used with the beampipe with diameter 40 mm upstream side and 104 mm downstream side. The geometry has beampipe flange on the back-side of the wall.

v21g: STS geometry is similar to the version v21e. The target position is at -40 cm considering global origin from the center of magnet. The STS local coordinate is from the last station. The geometry can be used with the beampipe with diameter 40 mm upstream side and 104 mm downstream side.

In both geometry, the STS box and the beam pipe flange is made of Carbon fiber: The material has 70% carbon fiber with density 1.75 g/cm3 and epoxy resin (30%) with density 1.2 g/cm3. The material is defined in media.geo file as STS_CarbonFiber_21.

assigned to @e.clerkin

requested review from @d.emschermann

Related MR in geometry repository: CbmSoft/cbmroot_geometry!111 (merged)

If possible should be merged before this one, as well as the eventual parameter files updates, and the hashes update added to this MR ( potential order conflict with !580 (merged) changing the mTRD geometries and which should also include the respective hashes updates)

Dear @v.friese,

you have been identified as code owner of at least one file which was changed with this merge request.

Please check the changes and approve them or request changes.

added CodeOwners label

added 3 commits

• 79f5e19c...9e5f79da - 2 commits from branch computing:master
• 12a9cd55 - STS geometries version v21f and v21g

Compare with previous version

added 13 commits

• 12a9cd55...0b178bb4 - 12 commits from branch computing:master
• e4c922f1 - STS geometries version v21f and v21g

Compare with previous version

Anomaly of expected target position between the f and g, which needs to be answered before merging.

added 10 commits

• e4c922f1...d46def34 - 9 commits from branch computing:master
• 22551a84 - STS geometries version v21e, v21f and v21g

Compare with previous version

added 2 commits

• 2720b5ea - 1 commit from branch computing:master
• 08bec204 - STS geometries version v21e, v21f and v21g

Compare with previous version

added 1 commit

• 063a365e - STS geometries version v21e, v21f and v21g

Compare with previous version

changed title from STS geometries version v21f and v21g to STS geometries version v21e, v21f and v21g

added 2 commits

• 2720b5ea - 1 commit from branch computing:master
• facb8c2f - STS geometries version v21e, v21f and v21g

Compare with previous version

added 6 commits

• facb8c2f...625a2223 - 5 commits from branch computing:master
• fc9b5cb6 - STS geometries version v21e, v21f and v21g

Compare with previous version

Correction to existing v21e geometry after positioning mismatch found between v21f and v21g. Placement has now been corrected.

v21e and v21g
Target XYZ: (0,0,-44)
Last Station XYZ: (0,0,59.5)
Center of magnetic field XYZ: (0,0,0)


v21[a-d], v21f
Target XYZ: (0,0,-4)
Last station XYZ: (0,0,99,5)
Center of the magnetic field XYZ: (0,0,40)


In v21e and v21g, the last station is used as origin for local coordinate system of the STS. v21[a-d,f] has no defined local coordinate system.

added 16 commits

• fc9b5cb6...f2ecbe69 - 15 commits from branch computing:master
• 1b187e87 - STS geometries version v21e, v21f and v21g

Compare with previous version

added 2 commits

• b1c2240a - STS geometries version v21f and v21g
• a352652e - Corrects STS v21e geometry version

Compare with previous version

approved this merge request

unapproved this merge request