sPHENIX tracking discussion

["Osborn, Joseph" <josborn1 AT bnl.gov>]

Hi Joseph,

 

Thanks for putting these together. I spent some time today implementing a bypass to the default geometry simulation transforms so that ACTS can read in these survey geometry transforms directly. I think we may have a definition mismatch as the local x axis rotation (alpha) is always really large, i.e. doesn’t appear to be a perturbation, and the y axis rotation is always a different sign from what Acts expects. This may be partially related to the swapped basis that ACTS uses. Let’s discuss it in the tracking meeting this week as I know you are also preparing your talk for the AUM workshop next week.

 

Joe Osborn

 

___________________________

Joe Osborn, Ph.D

Physics Department

Brookhaven National Laboratory

josborn1 AT bnl.gov

 

 

From: sPHENIX-tracking-l <sphenix-tracking-l-bounces AT lists.bnl.gov> on behalf of Bertaux, Joseph Tyler via sPHENIX-tracking-l <sphenix-tracking-l AT lists.bnl.gov>
Date: Monday, July 24, 2023 at 2:57 PM
To: sphenix-tracking-l AT lists.bnl.gov <sphenix-tracking-l AT lists.bnl.gov>
Cc: sphenix-intt-l AT lists.bnl.gov <sphenix-intt-l AT lists.bnl.gov>
Subject: [Sphenix-tracking-l] Revised align transforms

Hello,

 

I found and fixed a bug in creating the ladder_phi index (as discussed in the last INTT weekly meeting).

 

Here are the revised transforms.

 

Thank you,

 

Joseph