Brat update

From: Flemming Videbaek (videbaek@sgs1.hirg.bnl.gov)
Date: Thu Jun 13 2002 - 21:04:44 EDT

  • Next message: Claus O. E. Jorgensen: "Re: Existent ZDC calibrations" 

    Let me collaborate a bit more on the update to 2.3.16 as mentioned by Kris.
The main changes have been in regard
to tof-pid  ranging from calibration to rdo elements both for pp, and for
appiing the improved slewing procedure.
The factual changes are described from the changelog below.
A few notes are needed.

a) At present factual slewing for MRS is only avalible for 5940 (and
higher). A good call still has to be inserted for lower runs.
It is the experience that for theta away from 90 the multiple hits seems to
make the calibration more diffiicult.
b)Since the code for appliing slewing is changed a lot the existing slewing
paramerters for FS are USELESS and will produce
   faulty results. Thus make sure that the TofRdo slewing is turned off
until NEW calibration have been inserted (with a bit of luck early next
week).
c) a sample result from  MRS at 5940 is attacjhed here showing an overall
timing resolution in MRS at 90 of better than 80 psec (some individual
channels are better and other somewhat worse).

To make the slewing for lower runnumbersI really need reduced files for a 90
deg setting equivalent to 80K mrs tracks.
Other angles are not so useful. The slewings for MRS will have to be looked
at but likely the 12 deg 5940- set is quite good for this.

Flemming


------------------------------------------------------
Flemming Videbaek
Physics Department
Brookhaven National Laboratory

tlf: 631-344-4106
fax 631-344-1334
e-mail: videbaek@bnl.gov
----- Original Message -----
From: "Flemming Videbaek" <videbaek@rcf2.rhic.bnl.gov>
To: <videbaek@bnl.gov>
Sent: Thursday, June 13, 2002 4:19 PM
Subject: Brat


>
>
> 2002-06-13  Flemming Videbaek  <videbaek@rcas0017.rcf.bnl.gov>
>
> * modules/pid/BrTofPidModule.cxx, modules/pid/BrTofPidModule.h:
> Fix a typo.
> Change fPcut to be floats so one can have p<1 cuts for Mrs.
>
> * scripts/calib/td1/.cvsignore, scripts/calib/td1/Makefile.am,
> scripts/calib/td1/Td1Pedestal.C:
> Add directory and scrip for td1 calibration (Some of these and
> done
> using tof software.
>
> * scripts/calib/tof/CommitSlewing.C:
> Added new script for committing slewing correction.
> Copied from timeOffset commitscript.
>
> * modules/calib/tof/BrTofSlewingCalModule.cxx,
> modules/calib/tof/BrTofSlewingCalModule.h,
> modules/calib/tof/BrTofTimeOffsetCalModule.cxx,
> modules/calib/tof/BrTofTimeOffsetCalModule.h:
> mny modification to timeoffset and slewing modules.
> a) Offset module modified to deal with pp running and Td1, TMrsF
> start counters.
> b) The  slewing and offset mdoule now has similar cuts in pid,
> vertex cuts
>    and momentmu cut.
> c) The mrs code had a momentum cut introduced to not contaminate
> dt spectra with
>    the kaon's and protons.
> d) The slewing modules have added the method to fit  the hits
> using minuit rather than
>    2D histograms. the old method is kept for consistency (at least
> a while). As for
>    all slwing data correction rather large statistics is needed.
> e) Note that when using slewing the timeoffsets are still
> important!!! the first term in the
>    slweing is only a relative term taking into account the offsets
> created by the 1/sqrt(A) terms.
>    This implies that the same offsets are valid w and /wo slewing
> being done.
>
> * modules/pid/BrTofPidModule.cxx, modules/pid/BrTofPidModule.h:
> Add code to deal with TMrsF t0 startcounter for pp running.
> Modify default length to 433.5 cm for MRS. Change some of summary
> plots
> to have differential cuts on Mass2 rather than integral.
>
> * modules/track/tpc/BrTpcTrackModule.cxx,
> modules/track/tpc/BrTpcTrackModule.h:
> Add 2d summery devx/y histogram
>
> * modules/track/tpc/BrTpcClusterModule.cxx: add debug information
>
> * modules/rdo/BrTofRdoModule.cxx:
> The coding for timing calculation has been modified. The timing
> offsets are
> always used. The slat/up/down dt part has been removed (thus no
> dependence on
> effective speed of light in calcualtion of times. The slewings are
> now
> treated the same in MRS and FS. tested in MRS only though.
> The code also has code to deal with the pp start counters.
>
> * modules/abc/BrIOModule.cxx:
> The logic for calling opning fiules were mixed up in case of
> writermodules
> in Job mode.
> If a writer module and JobFile open in Init() and Close() in
> Finish()
> not in begin..
>
> * modules/abc/BrModuleContainer.cxx: change Info/debug level
>
> * db/calib/BrCalibration.cxx: small fix of print layout
>
> * modules/calib/tof/BrTofDeltaDelayCalModule.cxx:
> Added a while back debug output to this otherwise not in use
> module.
>
> * modules/track/combine/BrMrsTrackingModule.cxx:
> Change pathlength in histogram
>
> 2002-06-12  Andrey Makeev, Texas AMakeev_aM
> <makeev_a@rcas0017.rcf.bnl.gov>
>
> * modules/rdo/BrZdcRdoModule.cxx:
> commented irritating warning messages :)
>
> 2002-06-12  Flemming Videbaek  <videbaek@rcas0017.rcf.bnl.gov>
>
> * scripts/calib/bb/CommitTdcGain.C: Added stuff for pp Inel
> counters
>
>
    mrs_pid.gif
    mrs_w_slew.gif
    mrs_wo_slew.gif

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