PIONCT experiment 01-107

INDEX

Analysis Old notes and reports Information Meeting Minutes Presentations Links

Phone conference 03/20/07

Summary of the results

LT separation check

Common region
Iterations
Bin centering

Reports from Xin

L-T separation methods
L-T preliminary results

SIMC

Collimator punch-through
Acceptance cuts
All offsets
H(e,e'p) elastic yield check, summary
Material layers
Iteration correction
Coulomb corrections
Bin centering Central cross section
Wire chamber resolution
Analyzer and SIMC PmPar, PmPer and PmOop

Model

Estimate of multi-pion production
Analysis with tight delta cuts
Pauli blocking
Jost function

Tables of results (including yields, iterations and transparency)

Xin's LT separation website

Old Notes and Reports

SIMC

Model

FSI for heavy targets

Target thickness

Boiling corrections
x offset corrections
z offsets
Temperature corrections (and target thickness)
Dummy to target cell ratios - See Dave's work.

SIMC offsets

Spectrometer offsets
ytar_mean mean of ytar by setting
Dummy target simulation
Inserting the spectrometer offsets into SIMC
Transparency results with the offsets

Comparison with SIMC, Yield e'p vs. Q² (by Xin Qian)
Comparison with SIMC, Regge model (by Xin Qian)

Calibrations

Pass2
Pass1a checks
Calibration of the horizontal BPM's
Calibration of the vertical BPM's
Possible time dependence in horiz calibration
Calibration of the BPM's
Pass1a ntuples and scalers are in the directory /p/hallc-daq04/clasie/pass1a/replay.
Analysis of e-pi events with low hsbeta
   Replay using Peter's prune method, page (1), (2)
Pass 1 summary and results
   Replay probelms
   (ntuples are located at ~clasie/oldwork/pass1/replay/paw)
      index of calibration kumacs (Large files (~10MB), and work disk must be mounted)
Run database and list of trips, reboots, etc
Calibration issues
BCM calibrations (including run 52368 from Dec 2004)
Pass0 summary and results
Calibration of Peter's SOS gas Cerenkov
HMS gas cerenkov SPE peak plot, fit using three Gaussian curves
HMS aerogel SPE peak plot, fit using two Gaussian curves and a line
SOS gas cerenkov SPE peak plot (by Jason Seely)
SOS gas cerenkov SPE peak plot, fit using three Gaussian curves

Offsets

Table of final heep offsets and correction here
Mistake in my hee'p method and results 03/28/06
Chungchen's corrections
Vertical beam position
Size and direction of the OOP offset
Another correction to the final ntuples
Final ntuple Hee'p check and corrected Hee'p check
Offset look-up table and results 03/08/06
Summary 03/08/06 (1, 2, 3) More details can be found here ....

Replay settings
Energy loss and radiative corrections
Procedure for Hee'p checking
Results 02/13/06
Tables of derivatives
Note about energy loss correction
Results 02/16/06
Inserting offsets into the engine
Results 02/22/06 - second iteration
Results 02/23/06 - some bug fixes
Position of peaks after replay
Choice of heep offsets
Yields vs. heep offsets

Heep check 4GeV report by Ken Garrow

Optics

Replay errors after using parameterization
SOS satcorr parameterization and results
saturation correction procedure HMS and SOS
Comparison of the SOS default matrix and the 1740 matrix and Conclusions
Production data at 1.19 GeV
SOS delta scan conclusions
SOS delta scans with the default matrix and 900 matrix
SOS delta scan settings
Comparison of SOS angles (page 1) (page 2) (all pages)
Comparison of SOS angles
Comparison of matrices using Ytar and no BPM
SOS optimization (1.2 GeV)
SOS optics check
Beam offsets
Optics problems

Data Corrections

3/4 efficiency

HMS 3/4 efficiency
3/4 effic method
3/4 effic for all runs HMS SOS (NB large files!)
Conclusions

Fid efficiency Correction and average effic
3 out of 4 efficiency and Dipangkar's suggestion
Check of run 49820
Check of runs with low fid effic
Collimator punch-through Em cuts

Fix for fid effic for runs with trips
Pass1a (Efficiency and stability for Carbon, Dummy and Hydrogen runs)

Cuts used for the efficiencies.
Cerenkov npe cuts and the efficiency

HMS Cerenkov effic with position cuts at the dipole
Cerenkov Pion rejection ratio Efficiency vs momentum
HMS hodoscope fiducial track efficiency, hfid
Unstable rates

HMS calorimeter positron contamination

Yields

Normalized yield stability

(bcm1), (bcm2)
(bcm1 with fid effic fix)

(bcm2), (bcm2 and no Em cut)
(no short runs )
(strict nuclear missmass cut )
(nuclear missmass cut by eye)
(deuterium using mmx cut)

Search for errors in the replay output file
Scintillator and normalized rate stability
Method
Problematic runs

Cross Section Iteration

Carbon cross section

Before iterations (tanja cs model)
After iteration with fid effic correction
After iteration with strict missmass cuts and normalized
After iteration with nuclear missmass cuts determined by eye and normalized

Hydrogen central cross section

After iteration with strict missmass cuts
After iteration with nuclear missmass cuts determined by eye
After iteration with old M_p mmx cuts

Iteration of the p(e,e'pi+) cross section

Tanja's model cross section
Tanja's model and fid effic correction
Tanja's model, no short runs and strict missmass cuts
Tanja's model, no short runs and nuclear missmass cuts determined by eye

Transparency

Modifications timeline
Tables of results (including yields, iterations and transparency)
Carbon mmnuc cut determination

mmnuc data vs. simc (without mmnuc cuts), (without mmnuc cuts and normalized)

Carbon nuclear Transparency

(no iteration), (good runs) and (bcm1 with fid fix)
(bcm2 no collimator cut and with fid fix)
(no short runs)
(strict missmass cuts)
(nuclear missmass cut by eye)
(carbon transp using hydrogen and original M-p mmx cuts)
(carbon transp using deuterium and original M-p mmx cuts)

L-T separation

Results writeup (by Xin Qian)
Results figures (by Xin Qian)

Traditional Glauber calculation

Normalization correction for small A nuclei
Correlation function normalization
Density distribution changes
Energy dependent cross sections
Correlated Glauber calculation
Simple Glauber calculation

Systematic uncertainty

Yields vs. heep offsets

Information

A. Larson, G. Miller and M. Strikman, "Pionic Color Transparency"
E01-107 proposal
Central kinematics for each setting (and latex source)
Runlist by run or by setting
Equipment events by run (trips, reboots, beam events)
Optics runlist
My copy of the June-July '04 runplan and the December '04 runplan
Electroproduction cross section
Quasi-free cross section
Run database
Task list for final results

Meeting Minutes

01/26/05
03/23/05
05/04/05
06/01/05
08/03/05
08/17/05
09/07/05 (link to meeting page)
09/13/05 (link to meeting page)
11/10/05
01/02/06 (link to meeting page)
04/19/06 (link to meeting page)
06/20/06 (link to meeting page)

Presentations

Dec 12, 2002	NUINT		pdf	Dipangkar Dutta
Oct 14, 2003	Probing nucleons and nuclei via the (e,e'p) reaction	Grenoble,France	ppt	Dipangkar Dutta
Oct, 2003	Proceedings for eep03		ps	Dipangkar Dutta
	eepi04		ppt	Dipangkar Dutta
April 1, 2004	Thesis proposal meeting	MIT	pdf,ps,ppt	Ben Clasie
April 2, 2004	Thesis proposal meeting	MIT	url	Jason Seely
June 16, 2004	Users' workshop and annual meeting	JLab	pdf	Dipangkar Dutta
Jan 6, 2005	Users Meeting	JLab	pdf,ps,ppt	Ben Clasie
April 2005	Group meeting	Duke Univ.	pdf	Xin Qian
May 13, 2005	Thesis committee meeting	MIT	pdf, ppt	Ben Clasie
Sept 18-22 '05	DNP and JPS joint meeting	Hawaii	pdf, ppt	Ben Clasie
Sept 18-22 '05	DNP and JPS joint meeting	Hawaii	pdf, ppt	Dipangkar Dutta
Jan 5, 2006	Users Meeting	JLab	pdf, sxi	Ben Clasie
Jan 5, 2006	Users Meeting	JLab	pdf	Xin Qian
May 19, 2006	Hall C meeting	JLab	sxi	Dipangkar Dutta
July 30, 2006	Gordon Research Conference	Tilton, NH	ppt	Dipangkar Dutta
Aug 18, 2006	Thesis defense	MIT