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CALIFA-SiTracker-GLAD geometry conflict [message #20496] Wed, 08 March 2017 16:26 Go to next message
Anna Corsi is currently offline  Anna Corsi
Messages: 7
Registered: August 2016
Location: CEA Saclay
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From: 140.181.8*
Hello,

I find a conflict of geometry among the following detectors, as in attached picture.
detGeo.Add(new TObjString("GLAD"), new TObjString("glad_v13b.geo.root"));
detGeo.Add(new TObjString("CALIFA"), new TObjString("califa_17_v8.11_cc0.2.geo.root"));
detGeo.Add(new TObjString("STaRTrack"), new TObjString("startra_v16-300_2layers.geo.root"));

Could you tell me which detectors should be moved to simulate experiments with setup expected for 2018?

Thanks in advance.
Best regards,
Anna

Re: CALIFA-SiTracker-GLAD geometry conflict [message #20498 is a reply to message #20496] Thu, 09 March 2017 19:25 Go to previous messageGo to next message
Hector Alvarez Pol is currently offline  Hector Alvarez Pol
Messages: 21
Registered: July 2015
Location: Univ. Santiago de Compost...
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From: *usc.es
Hi Ana,

last time I was testing the CALIFA position, it was correctly located with respect to the nominal target position.
If this is true, the magnet is misplaced by around half a meter in this geometry file.

For a fast check to determine if CALIFA is correctly centered, you could find where the origin is in your plot or simply visualize a reaction vertex...
the CALIFA barrel should be located as it is in the attached picture (side view).
A displacement of half a meter as it is shown in your pic would mean that the vertex could be located outside the Barrel.

Regards,
  • Attachment: 1211.jpg
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Re: CALIFA-SiTracker-GLAD geometry conflict [message #20508 is a reply to message #20496] Mon, 13 March 2017 14:41 Go to previous messageGo to next message
Michael Heil is currently offline  Michael Heil
Messages: 4
Registered: July 2015
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From: *gsi.de
Hello Anna,
here is my view of how to solve this problem: We used to have the target Position at x=0, y=0 and z=0 per Definition. The distance from the target position to the entrance flange of GLAD is 1062 mm. And Califa has also a nominal position relative to the target. If both are at this position there should be now overlap anymore.
Re: CALIFA-SiTracker-GLAD geometry conflict [message #20526 is a reply to message #20508] Tue, 14 March 2017 22:31 Go to previous message
Anna Corsi is currently offline  Anna Corsi
Messages: 7
Registered: August 2016
Location: CEA Saclay
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From: *fbx.proxad.net
Dear Hector and Michael,

Thank you for your replies.
In my understanding (see attachement) the GLAD position is such that the entrance flange is rather ~50 cm from the origin (target center), so it should be shifted downstream.
For information, the create_glad_geo file I used originally has DistanceToTarget = 350 (cm).

Best regards,
Anna
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