Difference between revisions of "Online analysis: results and TODO"

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* Maintain db_run.dat file: Make sure that every LHRS momentum and angle changes are logged (Florian Itard is keeping up with that)
 
* Maintain db_run.dat file: Make sure that every LHRS momentum and angle changes are logged (Florian Itard is keeping up with that)
 
* Database of run indicating line by line the run number, the target in position, the average beam current, LHRs pnom, LHRS angle, the purpose of the run
 
* Database of run indicating line by line the run number, the target in position, the average beam current, LHRs pnom, LHRS angle, the purpose of the run
−
[[www.jlab.org/~cshloka/halla/runlist.html Statistic summary]]
+
**[[https://spreadsheets.google.com/pub?key=0AkdO2Am6C34kdFRRU1B0RmNyb2JvRHlNQTJvUzBwX1E&hl=en&output=html new spread sheet]]
 +
**[[http://hallaweb.jlab.org/experiment/DVCS/statistics2/new_runlist.htm Statistic summary (old)]]
  
 
=Luminosity, efficiency=
 
=Luminosity, efficiency=
Line 16: Line 17:
 
==Trigger efficiency==
 
==Trigger efficiency==
  
−
Analyze data taken on the week-end of 10-09 and 10-10 with T3 and T4 trigger and also data taken around 10-14. Online analysis by B. Michaels [[http://www.jlab.org/~adaq/halog/html/1010_archive/101014213619.html here]]. Malek Mazouz is working on the offline study (starting on 10-16)
+
Online analysis by B. Michaels [[http://www.jlab.org/~adaq/halog/html/1010_archive/101014213619.html here]].  
 
===Run7711 T3 and T4 Triggers===
 
===Run7711 T3 and T4 Triggers===
 
S0 hit pattern vs x and y (at vdc) shows efficiency in excess of 99% except at extreme ends of focal plane
 
S0 hit pattern vs x and y (at vdc) shows efficiency in excess of 99% except at extreme ends of focal plane
Line 28: Line 29:
 
TCut cTarget  = "abs(L.tr.tg_y)<0.1";
 
TCut cTarget  = "abs(L.tr.tg_y)<0.1";
 
TCut cCleanTrk = cGoodVDC&&cGoodAngles&&cTarget;
 
TCut cCleanTrk = cGoodVDC&&cGoodAngles&&cTarget;
 +
 +
===Cerenkov Efficiency Study===
 +
Prior to afternoon of 1 Nov 2010, Cerenkov threshold at 200 mV.
 +
Inefficiency = 7%
 +
After lowering the threshold to 50 mV, Cerenkov inefficiency < 1.5%
 +
(Updated 12 Nov 2010)
 +
 +
[[Image:CerenkovTrigger-v2.pdf]]
  
 
== Deadtime==
 
== Deadtime==
 +
* Current scan :  (Runs: 1uA: 9250, 2uA: 9251, 4uA: 9252)
 
* Buffered mode (10-28): [[http://www.jlab.org/~adaq/halog/html/1010_archive/101028204024.html this halog]]
 
* Buffered mode (10-28): [[http://www.jlab.org/~adaq/halog/html/1010_archive/101028204024.html this halog]]
 
* info about livetime from TS registers [[http://www.jlab.org/~adaq/halog/html/1011_archive/101101121121.html this halog]]
 
* info about livetime from TS registers [[http://www.jlab.org/~adaq/halog/html/1011_archive/101101121121.html this halog]]
 +
* Pulser runs for dead time studies
  
 
=LHRS commissioning=
 
=LHRS commissioning=
Line 68: Line 79:
  
 
==BCM calibration==
 
==BCM calibration==
 +
* partial calibration on December 23:  [[http://www.jlab.org/~adaq/halog/html/1102_archive/110214183022.html results]], coda run number is 9875
 +
* partial calibration on December 13: [[http://www.jlab.org/~adaq/halog/html/1012_archive/101213231248.html results]]
 +
* third calibration on November 24: [[http://www.jlab.org/~adaq/halog/html/1011_archive/101128001059.html epics calibration]]
 +
* bcm gain jump (Nov 12): [[http://www.jlab.org/~adaq/halog/html/1011_archive/101119165809.html halog]]
 +
* second calibration on 11-05 (after temperature is fixed): [[http://www.jlab.org/~adaq/halog/html/1011_archive/101105142347.html here]]
 
* the initial calibration was done on 10-14 [[http://www.jlab.org/~adaq/halog/html/1010_archive/101014180119.html halog]]. Calibration results are [[http://www.jlab.org/~adaq/halog/html/1010_archive/101029071031.html here]]
 
* the initial calibration was done on 10-14 [[http://www.jlab.org/~adaq/halog/html/1010_archive/101014180119.html halog]]. Calibration results are [[http://www.jlab.org/~adaq/halog/html/1010_archive/101029071031.html here]]
  
Line 74: Line 90:
  
 
== Helicity ==
 
== Helicity ==
 +
* Helicity not defined gate: [[http://www.jlab.org/~adaq/halog/html/1011_archive/101105160519.html here]]
 +
* Helicity crisis: [[http://www.jlab.org/~adaq/halog/html/1011_archive/101104112036.html the problem]], [[http://www.jlab.org/~adaq/halog/html/1011_archive/101105145002.html a though of solution that did not work]], [[http://www.jlab.org/~adaq/halog/html/1011_archive/101113155233.html history]] also see the latest plot on that [[http://www.jlab.org/~jroche/transfer/display_history.gif here]], [[http://www.jlab.org/~adaq/halog/html/1011_archive/101112062525.html the solution]]
 +
* Large charge asymmetry : helicity sign check:  [[http://www.jlab.org/~adaq/halog/html/1011_archive/101103221311.html this halog]].
 
* ring map file
 
* ring map file
 
** November 1: new configuration [[http://www.jlab.org/~adaq/halog/html/1011_archive/101101100943.html here]]
 
** November 1: new configuration [[http://www.jlab.org/~adaq/halog/html/1011_archive/101101100943.html here]]
Line 82: Line 101:
  
 
== Polarization ==
 
== Polarization ==
 +
* Wien angles
 +
** [[http://www.jlab.org/~adaq/halog/html/1011_archive/101112163211.html Horizontal, Vertical and Solenoid]]
 
* Sign:
 
* Sign:
−
** Polarization sign: [[http://www.jlab.org/~adaq/halog/html/1010_archive/101028111513.html same sign HV in or OUT??]]<br>
+
** sign check [[http://www.jlab.org/~adaq/halog/html/1011_archive/101103221311.html here]]
 +
** Polarization sign: [[http://www.jlab.org/~adaq/halog/html/1010_archive/101028111513.html same sign HV in or OUT??]], [[http://www.jlab.org/~adaq/halog/html/1011_archive/101104220044.html the solution]]<br>
 
*Moeller
 
*Moeller
 
**[[http://www.jlab.org/~adaq/halog/html/1010_archive/101027155511.html Moeller 10-27]]<br>
 
**[[http://www.jlab.org/~adaq/halog/html/1010_archive/101027155511.html Moeller 10-27]]<br>
 
**[[http://www.jlab.org/~adaq/halog/html/1010_archive/101003230704.html Moeller 10-03]]<br>
 
**[[http://www.jlab.org/~adaq/halog/html/1010_archive/101003230704.html Moeller 10-03]]<br>
 
*Compton
 
*Compton
 +
**[[http://www.jlab.org/~adaq/halog/html/1012_archive/101208080052.html results on December 8]]
 +
**[[http://www.jlab.org/~adaq/halog/html/1011_archive/101128080756.html results on November 28]]
 +
**[[http://www.jlab.org/~adaq/halog/html/1011_archive/101117152831.html results on November 17]]
 
**[[http://www.jlab.org/~adaq/halog/html/1010_archive/101030024237.html first results]]
 
**[[http://www.jlab.org/~adaq/halog/html/1010_archive/101030024237.html first results]]
 +
** [[http://www.jlab.org/~adaq/halog/html/1011_archive/101103215928.html Results November 3]]
 +
 +
= Analysis outputs =
 +
From Carlos:
 +
 +
You can find under the directory /adaql4/work1/dvcs/ntuples/ in the
 +
adaq computers ntuples corresponding to a first "fast" analysis pass.
 +
 +
Each file contains 2 ntuples (ntu1 and ntu2) corresponding to 1 and 2
 +
clusters events. The name of the variables should be self-explanatory, but
 +
feel free to ask me.
 +
 +
These files correspond to a first analysis pass with a software
 +
calorimeter threshold of 1 GeV, fast waveform analysis (1-pulse fit only)
 +
and (elastic) calibration coefficients from Oct 26. Timing cut is -3,+3 ns
 +
wrt HRS. Additional cuts include 1-track only in the HRS and reasonable
 +
vertex reconstruction (within the target length).
 +
 +
All runs (even junk or LeftHRS-only, see PS below) are analyzed
 +
automatically as they are produced (although there is a backlog of a
 +
couple of days).
 +
 +
Please report any problems you might see, or any interesting variables
 +
missing.
 +
 +
= Trigger efficiency studies =
 +
Run 9745  with singles

Latest revision as of 16:58, 3 March 2011

Back to DVCS

This page is in progress, please new items to it. When you obtain a result, log in into the Halog and link it to this page. if you are willing to take charge of a given analysis, please indicate it on this page as well as the date at which you are starting to work on it.

Matching data taking with run plans

  • Update the how to
  • Maintain db_run.dat file: Make sure that every LHRS momentum and angle changes are logged (Florian Itard is keeping up with that)
  • Database of run indicating line by line the run number, the target in position, the average beam current, LHRs pnom, LHRS angle, the purpose of the run

Luminosity, efficiency

Boiling test

Initial calibration on 10-17 owl shift: [shift summary][initial plan]
Second calibration on 10-21 swing shift: [run list]

Trigger efficiency

Online analysis by B. Michaels [here].

Run7711 T3 and T4 Triggers

S0 hit pattern vs x and y (at vdc) shows efficiency in excess of 99% except at extreme ends of focal plane halog entry 336817 http://www.jlab.org/~adaq/halog/html/1010_archive/101026122751.html

Cut script saved at /adaqfs/home/adaq/dvcs/onlana/GoodHRS.h TCut cGoodVDC = "L.tr.n==1&&abs(L.tr.x)<1."; TCut cGoodAngles = "abs(L.tr.tg_th)<0.1&&abs(L.tr.tg_ph)<0.05"; TCut cTarget = "abs(L.tr.tg_y)<0.1"; TCut cCleanTrk = cGoodVDC&&cGoodAngles&&cTarget;

Cerenkov Efficiency Study

Prior to afternoon of 1 Nov 2010, Cerenkov threshold at 200 mV. Inefficiency = 7% After lowering the threshold to 50 mV, Cerenkov inefficiency < 1.5% (Updated 12 Nov 2010)

File:CerenkovTrigger-v2.pdf

Deadtime

  • Current scan : (Runs: 1uA: 9250, 2uA: 9251, 4uA: 9252)
  • Buffered mode (10-28): [this halog]
  • info about livetime from TS registers [this halog]
  • Pulser runs for dead time studies

LHRS commissioning

Calibrate the ADCs:

Still to be done S1, Pion rejector, (Shloka is working on that) 

[Cerenkov], [S2 (done 10-09)]

Calibrate detector time spectra:

Still to be done : understand timing spectra for S1,S2 and the Cerenkov

Evaluate PID efficiency:

LHRS optics run (no sieve/sieve)

Ye Zhihong is interested in this analysis and started it.

LHRS acceptance check

[delta scan on 10-22] need to be analyzed

DVCS Calorimeter

  • two photon invariant mass: [10-24]

Elastic calibration

Beam

BPM calibration

BCM calibration

  • partial calibration on December 23: [results], coda run number is 9875
  • partial calibration on December 13: [results]
  • third calibration on November 24: [epics calibration]
  • bcm gain jump (Nov 12): [halog]
  • second calibration on 11-05 (after temperature is fixed): [here]
  • the initial calibration was done on 10-14 [halog]. Calibration results are [here]

Beam energy measurement

  • the initial measurement was done on 10-15: [halog]

Helicity

Polarization

Analysis outputs

From Carlos:

You can find under the directory /adaql4/work1/dvcs/ntuples/ in the adaq computers ntuples corresponding to a first "fast" analysis pass.

Each file contains 2 ntuples (ntu1 and ntu2) corresponding to 1 and 2 clusters events. The name of the variables should be self-explanatory, but feel free to ask me.

These files correspond to a first analysis pass with a software calorimeter threshold of 1 GeV, fast waveform analysis (1-pulse fit only) and (elastic) calibration coefficients from Oct 26. Timing cut is -3,+3 ns wrt HRS. Additional cuts include 1-track only in the HRS and reasonable vertex reconstruction (within the target length).

All runs (even junk or LeftHRS-only, see PS below) are analyzed automatically as they are produced (although there is a backlog of a couple of days).

Please report any problems you might see, or any interesting variables missing.

Trigger efficiency studies

Run 9745 with singles

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