Star-tpc-l mailing list

[videbaek <videbaek AT bnl.gov>]

Hi Richard,
Sorry I was busy at the time of the meeting.
At the ops meeting we also learned that the 3 weeks repair time is most 
likely an underestimte more info to come soon.

Q: Does the statement that must be from Yuri on the FF vs RFF come from 
the track to GMT matching which is showed last week? I like some more 
explanation of this since I learned the TOF trays and the thus the GMT 
is
is mounted to the TPC. Thus I would not expect a shift in the matching 
observable, if the geometry is otherwise the same. Of course the B-field 
is changed. Are there any Lorentz effect in the GMT (3 layer GEM)  
itself. Or is the geometry different, and if so what was used.

best Flemming




On 2025-04-10 12:12, Richard Witt wrote:
> Present: Alexei, Jim, Flemming, Yuri, Gene, and myself
>
> == Hardware
>  — Nothing new reported this week
>
> == Electronics
>  — Tonko said he will begin to repair electronics next week
>
> == Software
>  — looking for STAR magnet access
>  — no shifts of TPC found from Alexei’s work
>  — cosmics from Run2025, FF vs RFF seems to show something that
> still looks like a shift
>  — want to better understand actual position of STAR magnet
>  — Work on SC
>  — BESII Run 23 and 24 work
>  — cluster of runs in Run23 that would note produce a calibration
> result
>  — pileup cut was vertex match between TPC and VPD vertices
>  — VPD issue and 1/4 of ToF in first weeks of Run23 (due to clock
> issues) was culprit
>  — somewhat of a sidetrack to look into timing there
>
> == AOB
>  — Nothing new reported this week
>
> Best Regards,
>   Richard
>
> Sent from my iPad
> --
> "Education is the most powerful weapon which you can use to change
> the world."
>
> --Nelson Mandela
>
> ~~~***~~~***~~~***~~~***~~~***~~~***~~~***~~~***~~~***~~~***~~~***~
>  Richard Witt, Professor of Physics     Phone (USNA): 410-293-6675 [1]
>     United States Naval Academy         Email: witt AT usna.edu
> ~~~***~~~***~~~***~~~***~~~***~~~***~~~***~~~***~~~***~~~***~~~***~
>
> Links:
> ------
> [1] tel:410-293-6675

--
Flemming Videbaek
senior scientist, emeritus
videbaek @ bnl.gov
Brookhaven National Lab
Physics Department
Bldg 510D
Upton, NY 11973

phone: 631-344-4106
cell     :  631-681-1596