Dave Gaskell's XEM Page
GENERAL INFO:
Link to main XEMPT page: XEMPT-04
Check out the analysis logbook.
Or how about the RUNLIST.
PEOPLE:
I. Useful people (students)
1) Aji
Daniel
2) Nadia
Fomin
3) Jason
Seely
4) Roman
Trojer
II. Helpful people (post-docs)
1) Karl
Slifer
2) Shige
Tajima
3) Xiaochao
Zheng
4) Patricia Solvignon
III. "Spokes"-people (?)
1) John
Arrington
2) Donal Day
3) Brad Filippone
4) Dave
Gaskell
5) Allison Lung
TALKS and
PUBLICATIONS:
Talks
1) "Inclusive Scattering from Nuclei at x>1
and High Q2 with a 5.75 GeV Beam,"
Nadia Fomin, Division
of Nuclear Physics Meeting: Chicago, IL, October 2004 (ppt)
2) "Inclusive Scattering from Nuclei at x>1
and High Q2 with a 5.75 GeV Beam,"
Nadia Fomin, UVa
Seminar: February,
2005 (ppt)
3) "Inclusive Electron Scattering from Nuclei
at x>1 and High Q2 with a 5.75 GeV Beam,"
Nadia Fomin, Division
of Nuclear
Physics Meeting: Maui, HI, September 2005 (ppt)
4) "A Precise Measurement of the EMC Effect in
Light Nuclei,"
Dave Gaskell, PANIC:
Santa
Fe, NM, October 2005 (ppt)
5) "Precise
Measurement of the Nuclear Dependence of Structure Functions in Light
Nuclei,"
Aji Daniel's, Hall C
Users Meeting:
Newport News, VA, January 2006 (pdf)
6) "Inclusive Electron Scattering from Nuclei
at x>1 and High Q2 with a 5.75 GeV Beam,"
Nadia Fomin, Hall C
Users Meeting:
Newport News, VA, January 2006 (ppt)
7) "New
Measurement of the EMC Effect in 3He and 4He,"
Jason Seely, DIS06: Tsukuba, Japan,
April 2006 (pdf)
8) "Precise
Measurement of the EMC Effect in Few Body Nuclei and at Large x,"
Aji Daniel, Hall C
Users Meeting: Newport News, VA, January 2007 (pdf)
9) "Inclusive Electron Scattering from Nuclei
at x>1 and High Q2 with a 5.75 GeV Beam,"
Nadia Fomin, Jefferson
Lab
User Group Meeting: Newport News, VA, June, 2006 (ppt)
10) "New Measurements of the
EMC Effect in Few-Body Nuclei,"
John Arrington, APS
Topical Group Meeting on
Hadron Physics: Nashville, TN, October 2006 (ppt)
11) "Inclusive Electron
Scattering from Nuclei at x>1 and High Q2
with a 5.75 GeV Beam,"
Nadia Fomin, Hall C
Users Meeting: Newport News, VA,
January 2007 (ppt)
Papers,
proceedings, etc.
1) Jason Seely's thesis, M.I.T., 2006 (pdf)
2) Proceedings from DIS 2006 (ps)
3) Proceedings from GHP 2006 (nucl-ex/0701017)
4) Aji Daniel's thesis, Univeristy of Houston, 2007 (pdf)
5) Proceedings from ICTP 2008 (AIP
conference proceedings)
6) "New Measuements of the EMC Effect in Very Light
Nuclei", J. Seely, A. Daniel,
et al (nucl-ex/0904.4448).
Submitted to PRL.
ANALYSIS STUFF:
General
1) Analysis task list.
2) Eric Christy's talk about
analyzing inclusive data in Hall C.
3) John's "long paper/report" containing info
that may be helpful for analyzers.
Meeting Minutes
1)
Feb. 9 2005
2) Feb.
24, 2005
3) Mar.
9, 2005
4) Mar.
23, 2005
5) Apr.
6, 2005
6) Apr.
20, 2005
7) May
4, 2005
8) May
18, 2005
9) Jun.
1, 2005
10) Jun.
15, 2005
Collaboration
Meeting
June 23, 2005. (agenda
and talks)
Targets and Beam position
1) Pictures of the target ladder (Sep. 1 2004)
can be
found here.
2) Meek's report on the target configuration is
here.
3) Target surveys: a) target_survey_june_2004.jpg
b) target_survey_sept_2004.jpg
Check out the Fpi2 target survey for
info on where each survey monument is located: fpi2_target_survey.gif
4) The thermometry was a little off for the
June-July
period. Here you can find my estimate of the effect on the cryotargets.
5) Dummy to target cell ratio
calculation. (Updated 7/13/2007)
6) The He-4 target had a leak this fall. Aji has
calculated the change
in the target density. See his log entry here.
He has a summary of the target
density for each run in text format: he4density.dat
7) The He-3 target also apparently had a slow leak. Here is Aji's log entry
and his run-by-run target density file: he3density.dat.
UPDATE: A small mistake was found - Aji has
updated densities here.
8) He-3 pressure sensor: small note here.
(NEW
7/13/2007)
8)
Discussion of beam and target offsets.
(Updated 7/13/2007: vacuum
motion effects had been ignored.)
Note that in the above discussion, I used the carbon target. The
cryotargets are slightly offset relative to carbon. See this log
entry.
9) Jim Dunne (Miss. State) had a student re-examine some of the
solid target thicknesses from the 2004 running. The copper target
came out identical to Meek's measurement, but he found the carbon
target to be about 0.6% thicker. See his e-mail here.
(NEW 7/13/2007)
Efficiencies
1) Report on calculating the computer dead time with the
pion-prescaling circuit enabled.
2) Nadia's 3/4 efficiency
studies
Calibrations
1) BCM global
calibration using "local zero" method and "run-averaged zero"
method.
2) HMS gas cerenkov
3) HMS calorimeter
Kinematics
1) Beam energy measurements: summer
2004 and fall
2004. Quick summary of energies:
a) E = 2038.64 +/- 1.1 MeV
(June 21, 2004)
b) E = 5010.79 +/- 1.5 MeV (June
27, 2004)
c) E = 5011.99 +/- 1.5 MeV
(July 21, 2004) <- Taken during pionCT running
d) E = 5767.13 +/- 1.65 MeV
(September 27, 2004)
e) E = 5767.17 +/- 1.65 MeV
(November 3, 2004)
f) E = 5766.26 +/- 1.65 MeV
(December 20, 2004) <- Taken during pionCT running
2) HMS momentum and angle offsets
Currently, it seems that our best offsets are more consistent with
those that Eric Christy found using the 1999 data rather than those
that Tanja found from the Fpi-2 data. See my disscussion here.
In the above link, I found the best offsets to be -0.6 mrad for the HMS
angle and +0.03% for the HMS momentum (relative to Tanja's -0.13% that
we have in the analyzer - so net -0.1%). If I do a combined
chi-squared minimization of the 6 GeV and 2 GeV data, it favors -0.4
mrad instead, but it could also be accounted for by a small beam energy
shift (smaller than the uncertainty in the measurement).
Results
(public)
1. Short paper on light target ratios: nucl-ex/0904.448 (Figures and tables).
Results
(password protected)
Quick links to some of Jason's
analysis results
a) Cross sections
b) Target ratios
c) Work done at Argonne
d) Plots
from Jason's thesis
This site is maintained by
David Gaskell
Last updated 2007-April-13