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["Fisyak, Yuri V" <fisyak AT bnl.gov>]

X = {-6, 7, -130};               

StarMagField::Instance()->BField(X,B);

B = {2.17315e-05, -2.53534e-05, -4.98625}; |B| = 4.98625 [kG]

NMR = 0.4988631 [T]

NMR/B = 0.4988631/4.98625*10 = 1.00047751316119338 => 0.5 %%

Just remind that our correction from St_starMagAvgC  

…

  Double_t      ScaleFactor(Int_t i = 0){return current()/(4500/(9.98071899596718826e-01));} // 12/03/20 scale Run 2020 11p5GeV K_s^0 (pcmax(0.49827)/pcmax(0.497611)) to PDG value

…

          = -1.93182515614376271e-03 = -2 %%

                                                              Yuri Fisyak

STAR                                           Phone: +1 631 344 3913
Brookhaven National Laboratory  Fax:    +1 631 344 4206
510A/1-161
http://www.star.bnl.gov/~fisyak       E-mail: fisyak AT bnl.gov

 

 

 

From: Star-tpc-l <star-tpc-l-bounces AT lists.bnl.gov> on behalf of Lebedev, Alexei via Star-tpc-l <star-tpc-l AT lists.bnl.gov>
Date: Thursday, June 20, 2024 at 3:47 PM
To: Star-tpc-l AT lists.bnl.gov <Star-tpc-l AT lists.bnl.gov>
Subject: [Star-tpc-l] Position of NMR probe

Dear All,

I have an approximate position of NMR probes.

There are two probes sitting on East side of TPC, Z position is about 1300mm from magnet center. So Z is -1300mm,  and X is about -60mm, Y is about. +/-70 mm.

After this run I'll order survey service to have more accuracy. Now my estimation is about 20-30mm.

Best regards, Alexei