Re: [Brahms-dev-l] [Brahms-l] RICH Calibration in CuCu

Hi Selemom,

This indeed look peculiar; I can see by looking at individual files that the 12434 is the problem.
Since the radius is determined from the hit patterns on the RICH, and momentum in fact can be determined from the radius when not 
saturated, it indicates that the Field was not the proper value
(but lower) for these runs. The DB as well as elog printout does not indicate any particular problem.
The gtr printout has same field for surrounding runs.
I could not access opus today to look for the CDEV readout of magnet during the runs.
Maybe Ramiro or someone else could lookup the Hallprobe keithley settings for these runs.
I did not look at the higher runs.
Unless we find the problem, I suggest the runs is omitted from the list of good runs!

flemming



--------------------------------------------
Flemming Videbaek
Physics Department
Bldg 510-D
Brookhaven National Laboratory
Upton, NY11973

phone: 631-344-4106
cell:       631-681-1596
fax:        631-344-1334
e-mail: videbaek @ bnl gov
----- Original Message ----- 
From: "Bekele, Selemon" <bekeleku_at_ku.edu>
To: <brahms-l_at_lists.bnl.gov>
Sent: Saturday, February 03, 2007 1:46 PM
Subject: [Brahms-l] RICH Calibration in CuCu


>
> Hi,
>
>   please have a look at the rich calibration
> plots for CuCu_at_200 GeV at
>
>    http://www4.rcf.bnl.gov/~tigist/RichCalibration/cucu/200/
>
> The band bewtween the pions(red) and the kaons (blue) in RadiusVsP_4A1219_Runs12427_12434.gif
> correponds to the run
>
> "/brahms/data03//data/run05/cucu/200/r12434/dst/dst012434v1p3.root" //this file from 4A1219
>
> The band bewtween the pions and the kaons in "RadiusVsP_8B1219_Runs12315_12497.gif"
> correponds to the run
>
> "/brahms/data03//data/run05/cucu/200/r12315/dst/dst012315v1p3.root" //this file from 8B1219
>
> Need to look at what the cause is.
>
> Selemon,
> _______________________________________________
> Brahms-l mailing list
> Brahms-l_at_lists.bnl.gov
> http://lists.bnl.gov/mailman/listinfo/brahms-l
> 

_______________________________________________
Brahms-dev-l mailing list
Brahms-dev-l_at_lists.bnl.gov
http://lists.bnl.gov/mailman/listinfo/brahms-dev-l