Commissioning and running of sPHENIX

["Sondheim, Walter E" <sondheim AT lanl.gov>]

A fascinating plot! Besides the 5.0 mm shift in the beam spot location (X or Y), the amount of background points to adding additional shielding - just my guess.

Cheers,

Walt

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From: Liu, Ming Xiong <mliu AT lanl.gov>

Date: Monday, Jul 17, 2023 at 5:59 PM

To: nouicer <rachid.nouicer AT bnl.gov>, sphenix-run-l AT lists.bnl.gov <sphenix-run-l AT lists.bnl.gov>, SPHENIX MVTX <sphenix-maps-l AT lists.bnl.gov>

Cc: Sondheim, Walter E <sondheim AT lanl.gov>, Camelia Mironov <camelia.mironov AT cern.ch>

Subject: Re: [Sphenix-run-l] Beam Spot and sPHENIX/INTT Geometry

Thank you Rachid, cc’d MVTX list,

Very interesting results, I wonder this has anything to do with the high beam background we have seen in MVTX …

 

Ming

 

Ming

 

-----

Dr. Ming Xiong Liu P-3, MS H846 Physics Division   Office: 505.667.7125 Mobile: 505.412.7396 Los Alamos National Laboratory

 

 

From: Sphenix-run-l <sphenix-run-l-bounces AT lists.bnl.gov> on behalf of nouicer <rachid.nouicer AT bnl.gov>
Date: Monday, July 17, 2023 at 5:39 PM
To: "sphenix-tracking-l AT lists.bnl.gov" <sphenix-tracking-l AT lists.bnl.gov>, <sphenix-run-l AT lists.bnl.gov>, "sphenix-intt-l AT lists.bnl.gov" <sphenix-intt-l AT lists.bnl.gov>
Subject: [Sphenix-run-l] Beam Spot and sPHENIX/INTT Geometry

 

Dear Joseph and Tony,

Please see the attached plots which correspond to the RHIC beam spot in X, Y directions obtained by the INTT detector using beam data with magnet-OFF run =20869 taken on 08 July 2023.

We observe that the beam spot coordinates is (0 mm, 5 mm); this means the beam spot is shifted by five mm in Y direction.

Before Stefan shows this plot to CAD, we need to understand is this shift by five mm is due to the beam shift itself, or it is caused by the INTT detector geometry (not fully implemented in our software).

I already provided you with the INTT local survey data (obtained at the lab for each ladder) as well with INTT Global survey data (obtained at the sPHENIXPHENIX IR).  Are these survey data implemented in the present sPHENIX/INTT detector geometry that we are using in our analysis or not?

We would highly appreciated your feedback. 

Sincerely,
Rachid for the INTT Group

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                                                 /                     /

 Rachid Nouicer                                 /                     /

 Brookhaven National Laboratory                /                     /

                                              /                     /

 Address:                                    /                     /

 Brookhaven National Laboratory (BNL)       /                     /

 Physics Department, Building 510c         /                     /

 20 Pennsylvania Avenue                   /                     /

 Upton, New York, 11973, U.S.A.          /Phone:+1 631 344 8433/

                                        /                     /

 E-mail : rachid.nouicer AT bnl.gov       / Fax:+1 631 344 3253 /

 Web:http://www4.rcf.bnl.gov/~nouicer /                     /

                                     /                     /

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