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["Hughes, Charles [PHYSA]" <chughes2 AT IASTATE.EDU>]

Laser origins should be the following:

	x0	y0	z0
Origin Laser0	57.9556	15.5291	105.5
Origin Laser1	-15.5291	57.9556	105.5
Origin Laser2	-57.9556	-15.5291	105.5
Origin Laser3	15.5291	-57.9556	105.5
Origin Laser4	57.9556	-15.5291	-105.5
Origin Laser5	15.5291	57.9556	-105.5
Origin Laser6	-57.9556	15.5291	-105.5
Origin Laser7	-15.5291	-57.9556	-105.5

Recall that they are rotated 15 deg. from 0, 90, 180, 270.

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From: sPHENIX-calibration-l <sphenix-calibration-l-bounces AT lists.bnl.gov> on behalf of Christof E Roland via sPHENIX-calibration-l <sphenix-calibration-l AT lists.bnl.gov>
Sent: Tuesday, March 12, 2024 1:55 PM
To: Pereira Da Costa, Hugo Denis Antonio <hugo.pereira-da-costa AT lanl.gov>
Cc: sphenix-calibration-l AT lists.bnl.gov <sphenix-calibration-l AT lists.bnl.gov>; sPHENIX-tracking-l <sphenix-tracking-l-bounces AT lists.bnl.gov>; Hugo Pereira Da Costa <hugo.pereira.da.costa AT gmail.com>
Subject: Re: [Sphenix-calibration-l] Follow up on direct laser reconstruction/generation

 

Hi Hugo,

this helps a lot. Thanks for checking.
Let me give it a try tomorrow.

the laser origins in the plot below look a bit peculiar...

Cheers

   Christof


> On 12. Mar 2024, at 18:41, Pereira Da Costa, Hugo Denis Antonio via sPHENIX-calibration-l <sphenix-calibration-l AT lists.bnl.gov> wrote:
>
>
> All, especially Christof, Charles
>
> - Charles: thanks for the suggestion about changing the lasers orientation ! that is why I was not getting any hits. I only tested with theta = 0, which is along the beam, and with lasers at R=60 , that is, between R2 and R3. All G4Hits were generated between regions, and without distortions, were all falling into the dead are. Hence no hits. Using the angles you suggested, I do see G4Hits, hits, even clusters, using the standard clustering, using the latest code from git.
>
> See figure attached (generated with my own evaluator)
>
> - Christof: in case this helps, I have put the macro I use as well as the modified version of G4_TrkrSimulation.C that selects only one laser angle, at "/phenix/u/hpereira/for_christof"
>
> Hugo
>
> <Screenshot_20240312_113517.png>_______________________________________________
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