E12-10-002 and E12-10-008/E12-06-105
Commissioning Experiments
Simona Malace
Norfolk State University
for the E12-10-002 Collaboration
Overview
 “Commissioning Experiments” – Fall 2016 (Spring 2017 ?)
 22 days for E12-06-107 “The search for the onset of color transparency”
D. Dutta, contact and spokesperson
R. Ent spokesperson
 22 days for E12-10-002 “Proton and deuteron structure at large x”
Simona Malace, contact and spokesperson
Eric Christy, Thia Keppel, Ioana Niculescu - spokespeople
 4 days for E12-10-008/E12-06-105 “The EMC effect & x > 1”
A. Daniel, contact and spokesperson
J. Arrington, D. Gakell – spokespeople
D. Day, contact and spokesperson
J. Arrington, N. Fomin, P. Solvignon-Slifer
 6 days for E12-10-003 “The deuteron electro-disintegration at very high missing momenta”
W. Boeglin, contact and spokesperson
M. Jones – spokesperson
E12-10-002/008 on the Schedule
(it could change)
9 days
E12-10-002/008 starts on Nov. 17, 2016 and runs for 6 days
With 11 GeV beam and at least 40 mA current
E12-10-002/008 on the Schedule
After a break of 7 days (Thanksgiving)
(it could change)
E12-10-002/008 resumes running for 19
days at 11 GeV and 40 mA
Then after a long break (2 months) E12-10-002 gets one more day of beam to acquire one e
point for an R determination
E12-10-002: Constrain PDFs at Large x
 Typical PDFs extraction still lacking in the required precision at low x and large x
CTEQ-JLab
 Next-to-leading order (NLO) analysis of expanded data set on proton and deuterium
 Improve large-x precision with larger DIS data set on both proton and deuterium: relaxing
kinematic cuts to push to larger x leads to a factor of 2 increase in number of DIS data points used
for fitting
W 2  M 2  Q2
1 x
stringent cut:
Q2 > 4 GeV2,
W2 > 12.25 GeV2
relaxed cut:
Q2 > mc2 GeV2,
W2 > 3 GeV2
x
A. Accardi et al., Phys. Rev. D 81
(2010) 034016 – 61 citations
A. Accardi et al., Phys. Rev. D 84
(2011) 014008 – 58 citations
J. Owens et al., Phys. Rev. D 87
(2013) 094012 – 91 citations
E00-116, the 6 GeV predecessor of E12-10-002
•
Include all relevant large-x / small-Q2 theory non-perturbative corrections: dynamical and
kinematic higher-twist (HT)
•
Include nuclear corrections: use of deuterium data requires careful treatment of nuclear
corrections -- off-shell effects and sensitivity to the deuteron wave function
CTEQ-JLab
 Next-to-leading order (NLO) analysis of expanded data set on proton and deuterium
 Improve large-x precision with larger DIS data set on both proton and deuterium: relaxing
kinematic cuts to push to larger x leads to a factor of 2 increase in number of DIS data points used
for fitting
W 2  M 2  Q2
1 x
stringent cut:
Q2 > 4 GeV2,
W2 > 12.25 GeV2
E12-10-002
From A. Accardi
Simona will send Alberto projected kinematicdependent uncertainties (3rd week of February)
to look at the impact of E12-10-002 on the
CTEQ-JLab fits!
relaxed cut:
Q2 > mc2 GeV2,
W2 > 3 GeV2
x
A. Accardi et al., Phys. Rev. D 81
(2010) 034016 – 61 citations
A. Accardi et al., Phys. Rev. D 84
(2011) 014008 – 58 citations
J. Owens et al., Phys. Rev. D 87
(2013) 094012 – 91 citations
From Alberto: “by looking at the 12 GeV data, I see
that it covers the whole 0.2-0.9 range much larger in
both directions than the 0.45-0.75 of the 6 GeV
measurements. For the d-quark, at large x this data
should be competitive with the D0 W asymmetry data,
and at low x it might cut another 50% in the
uncertainty. So, I would expect some visible impact
when we add these to the whole CJ15 data set.”
E12-10-002: Production Kinematics, SHMS
 Except for the 50 deg data, all of our production measurements will be taken with SHMS
SHMS kinematic settings at with 11 GeV beam
Angle (deg)
Momentum (GeV/c)
Target
17
4, 4.5, 5, 5.5, 6.1
H, D, Al
20
2.9, 3.5, 4.4, 5.4
H, D, Al
25
2.8, 3.5, 4.4
H, D, Al
30
2, 2.4, 3, 3.6
H, D, Al
35
1.5, 1.9, 2.4, 2.95
H, D, Al
40
1.9, 2.4
H, D, Al
 6 angle changes
 22 momentum changes
 Target changes:
There is significant overlap between scans
at fixed angles to test the modeling of the
acceptance corrections - commissioning
 11 at 17 deg
 9 at 20 deg
 7 at 25 deg
 9 at 30 deg
 9 at 35 deg
 5 at 40 deg
48 target changes, only
for E12-10-002 (we will be
adding those for
E12-10-008)
E12-10-008: Production Kinematics, SHMS
 E12-10-002 and E12-10-008 will share D data at some of the kinematic settings
E12-10-002 SHMS kinematic settings at with 11 GeV beam
Angle (deg)
Momentum (GeV/c)
Target
17
4, 4.5, 5, 5.5, 6.1
H, D, Al
20
2.9, 3.5, 4.4, 5.4
H, D, Al
C, 10B, 11B, 9Be
25
2.8, 3.5, 4.4
H, D, Al
30
2, 2.4, 3, 3.6
H, D, Al
C
C
35
1.5, 1.9, 2.4, 2.95
H, D, Al
40
1.9, 2.4
H, D, Al
within 2 PAC days allocated for
E12-10-008 (and E12-06-005)
 E12-10-008 will take data on few nuclear targets (C, 10,11B, 9Be) to extract cross sections
A/D ratios (EMC ratios) - 2 PAC days
 An additional angle will be added for the E12-06-105 “x > 1” running (to be
determined), this will also fit within the 2 PAC days allocated for E12-10-008/E12-06-105
E12-10-002: Production Kinematics, HMS
 The the 50 deg production data will be taken with HMS, 17 deg data as well to
cross-calibrate the two spectrometers
HMS kinematic settings at with 11 GeV beam
Angle (deg)
Momentum (GeV)
17
4.5, 5, 5.5, 6, 6.8
50
1.4, 1.55, 1.75, 1.95
50 deg: Production to push to highest Q2, x
17 deg: commissioning data to cross-calibrate
HMS and SHMS
 2 angle changes
 9 momentum changes
During the SHMS production running at 20, 25, 30, 35, 40 deg the HMS will take production data
at 50 deg!
Is there a limit on the maximum angle opening between HMS and SHMS?
E12-10-002: H Cross Section Model for Inelastic e- Rates
 Right now using the F1F207 model by E. Christy (and P. Bosted) – this is not constrained
by measurements beyond Q2 of 8 GeV2 and W2 of 9.6 GeV2
 To do: will try other models, F2allm: constrained for W2 > 3 GeV2 and Q2 < 5000 GeV2
 Pretty small cross sections at the largest x & Q2
E12-10-002: Inelastic Rates for e- and p- Production on H
 Parameters for H rates calculations:
Target: density = 0.0723 g/cm3, length = 10 cm
Beam: current = 40 mA
Spectrometer solid angles: SHMS  0.004 sr, HMS  0.006 sr
Pion cross section: Wiser’s fit to p+ and p- production on H
p- rate
e- rate
 Small inelastic
rates, at most few
KHz
 To do: try with a current of 65 mA, if we can have it we will take it
 To do: updated inelastic e- rates for D target
E12-10-002: p-/e- Ratios for H
 Parameters for H rates calculations:
Target: density = 0.0723 g/cm3, length = 10 cm
Beam: current = 40 mA
Spectrometer solid angles: SHMS  0.004 sr, HMS  0.006 sr
Pion cross section: Wiser’s fit to p+ and p- production on H
250
SHMS, HMS
SHMS
SHMS
SHMS
150
SHMS
SHMS
HMS
SHMS: p/e- < 250
HMS: p/e- < 150
 To do: ratios with the radiated e- cross sections
 To do: updated p-/e- ratios for D target
E12-10-002: e+/e- Ratios
 Parameters for charge-symmetric background calculations:
Target: H, length = 10 cm
e+ cross section: P. Bosted’s code based on Wiser’s fit to p+ and p- production on H
(%)
 To do: make ratios with the
radiated e- cross sections
 To do: produce p+/e+ ratios
(we may need to run a with a
clean trigger to accumulate
decent statistics on e+)
 To do: updated prediction for
charge-symmetric
background production on D
E12-10-008: p-/e- and e+/e- Ratios
 E12-10-008 will measure charge-symmetric background as well
 The PID requirements for E12-10-008 similar to those of E12-10-002
plot from Dave Gaskell
 From original proposal, charge-symmetric
background calculated at 35 deg for few nuclear
targets
 p-/e- ratio at most 300
E12-10-002: H Production Time Estimates
 Parameters for H running time estimates:
 Generally (see table) 1.5% statistics in a W2 bin of 0.1 GeV2
 15% more events in each bin as safety factor + accounts for background subtraction
 Times are also adjusted to account for pion rates
 To do: update D running time, for now it is assumed to be
½ of H running time, 60 h
Angle (deg)
Time (h)
1.5% stat.
for W2 > ?
17
1.5
1.4
20
3
1.6
25
9
1.9
30
21
2.5
35
33
2.8
40
52
3
Total time for H running: 119.5 h
E12-10-002: Running at 6.6 GeV for determination of R
 To do: fix kinematics for all e points at 6.6 GeV
E12-10-002: Production Time Estimates
 We assume the following has been completed prior to the start of E12-10-002: beamline
instrumentation commissioning (BPMs, Harps, BCM calibration), beam energy measurement, HMS &
SHMS detector checkout, target boiling and rate dependence studies, optics for HMS and SHMS
Activity
Time (PAC hours)
Production (H, D)
180
Background – target endcaps
12
Background – charge symmetric
27
H elastic/D quasielastic
8
Configuration changes
15
R measurement
12
total: 10.6 PAC days
 Background – target endcaps: 20% of D production time
 Background – charge symmetric: 15% of H & D production time
 H elastics/D quasielastic (to be determined): needed to get systematic uncertainty coming
from the elastic/quasielastic subtraction
 Configuration changes: 6 minutes per target change, 20 minutes per angle and momentum
change combined
Pre-commissioning Run
 Beamline BPMs and Harps (additional new BPM to monitor the beam position
downstream from target)
 BCM calibration
 Beam energy measurement
 Target boiling studies on H and D, rate dependence studies on Carbon
 HMS & SHMS detector checkout:
 take data for calibration and to verify trigger efficiency, tracking, Cherenkov and
Calorimeter cut efficiencies, Cherenkov and Calorimeter pion rejection factor (both
spectrometers)
 SHMS & HMS optics
?
E12-10-002: Running Parameters & Equipment
 Beam:
 Energy for production: 11 GeV & 6.6 GeV (the lower beam energy is needed for R determination)
 Current: 40 mA (we will take 65 mA, if available)
We calculated our run times with 40 mA to be safe but we will happily take 65 mA (E12-06-107 that
runs before E12-10-002/008 is expected to receive 65 mA & conditions in other halls stay the same
 Targets:
 10 cm Hydrogen – production (longer than what we ran
with at 6 GeV)
 10 cm Deuterium – production (longer than what we ran
with at 6 GeV)
 4 cm Hydrogen – acceptance studies
 1-foil C 0.5% r.l. – acceptance studies
 2-foil C – acceptance studies
 2 foils Al – background measurement
 Spectrometers:
 SHMS: for most of our production run (17, 20, 25, 30, 35, 40 deg)
 HMS: production at 50 deg + 17 deg for commissioning
E12-10-008: Running Parameters & Equipment
 Beam:
 Energy for production: 11 GeV
 Current: 40 mA (will take 65 mA, if available)
 Targets:
 12C 1.5% r.l. – production
 10Boron 1.2% r.l. – production
 11Boron 1.2% r.l. – prodution
 9Be 2% r.l. – production
E12-10-008 will use the deuterium data from E12-10-002
to produce EMC ratios: 12C/D, 10,11B/D, 9Be/D
 E12-10-008 and E12-10-002 may have different statistics
goals/different binning in physics variables
 We will optimize the run plan to make sure that the
Deuterium data shared by the two experiments will satisfy
the needs of both (will be working with Dave Gaskell to
finalize the combined run plan within the next month)
 Spectrometers:
 SHMS: all production run
E12-10-002: SHMS Equipment & Running Parameters
 For momenta between 1.4 and 4 GeV, p/e < 250
 Cherenkov rejection: HGC - 25:1 & LGC (Ar) - 25:1
 Calorimeter rejection: 150 – 200 (99.5% efficient)
negligible p contamination
 For momenta > 4 GeV, p/e < 2.5
 Cherenkov rejection: LGC (Ar) – 25:1
 Calorimeter rejection: 200 (99.5% efficient)
Pertaining to
SHMS Heavy Gas
Cherenkov (HGC)
C4F8O at 0.45 atm
gives a 4 GeV
momentum
threshold for p
< negligible p contamination
Pertaining to SHMS
Noble gas Cherenkov
(LGC)
6 GeV momentum
threshold for p
E12-10-002: HMS Equipment & Running Parameters
 For momenta between 1.4 and 4 GeV, p/e < 150
 Cherenkov rejection: 100:1
 Calorimeter rejection: 100 – 180
1.5% p contamination
 For momenta > 4 GeV, p/e < 2.5
 Calorimeter rejection: 150
< 1.6% p contamination
Momenta between 1.4 and 7 GeV: calorimeter p
rejection factor between 100 and 200 can be achieved
while keeping the e efficiency larger than 98% (for
calorimeter cut of 0.9)
C4F8O at 0.45 atm
gives a 4 GeV
momentum
threshold for p
E12-10-002: Analysis Plan
Online/Offline Analysis:
 Coordinator: S. Malace
E. Christy (back-up)
 Students: Deb Biswas (Hampton U., E. Christy - supervisor)
W&M student (Lauren) ? (S. Malace - supervisor)
 Software:
shared by all 3 inclusive
experiments
E12-10-002
specific
 Hall C C++ Analyzer: decoding, produce root files with physics, analysis variables
 C stand-alone codes for calibrations, online monitoring of running parameters
 C stand-alone codes for efficiency calculations, dead times
 usual fortran code “externals” for radiative corrections
 Acceptance corrections: single arm Hall C Monte Carlo (fortran)
 stand-alone C code to extract background (positron) cross sections
 Cross section analysis/extraction: C analysis package developed for Rosen07 & Rosen05
(by Vahe Mamyan) maintained by S. Malace
E12-10-002: Analysis Plan
Online/Offline Analysis:
 Coordinator: S. Malace
E. Christy (back-up)
 Students: Deb Biswas (Hampton U., E. Christy - supervisor)
W&M student (Lauren) ? (S. Malace - supervisor)
 Software:
 Hall C C++ Analyzer: decoding, produce root files with physics, analysis variables
 C stand-alone codes for calibrations, online monitoring of running parameters
 C stand-alone codes for efficiency calculations, dead times
 usual fortran code “externals” for radiative corrections
 Acceptance corrections: single arm Hall C Monte Carlo (fortran)
 stand-alone C code to extract background (positron) cross sections
 Cross section analysis/extraction: C analysis package developed for Rosen07 & Rosen05
(by Vahe Mamyan) maintained by S. Malace
S. Malace/Deb Biswas/W&M student (?) will start working on getting the generic package
ready for the E12-10-002 analysis (start, end of February)
Kayla Craycraft (student on E12-10-008/E12-06-105) will join us (?) – customized Hall C C++
Analyzer package and calibrations will most likely be shared by the 3 inclusive experiments
E12-10-002: Analysis Plan
Online/Offline Analysis:
 Coordinator: S. Malace
E. Christy (back-up)
 Students: Deb Biswas (Hampton U., E. Christy - supervisor)
W&M student (Lauren) ? (S. Malace - supervisor)
 Software:
 Hall C C++ Analyzer: decoding, produce root files with physics, analysis variables
 C stand-alone codes for calibrations, online monitoring of running parameters
 C stand-alone codes for efficiency calculations, dead times
 usual fortran code “externals” for radiative corrections
ready
 Acceptance corrections: single arm Hall C Monte Carlo (fortran)
lower priority for
 stand-alone C code to extract background (positron) cross sections online analysis
 Cross section analysis/extraction: C analysis package developed for Rosen07 & Rosen05
(by Vahe Mamyan) maintained by S. Malace
S. Malace/Deb Biswas/W&M student (?)
E12-10-002: Analysis Plan
Online/Offline Analysis:
 Coordinator: S. Malace
E. Christy (back-up)
 Students: Deb Biswas (Hampton U., E. Christy - supervisor)
W&M student (Lauren) ? (S. Malace - supervisor)
 Software:
 Hall C C++ Analyzer: decoding, produce root files with physics, analysis variables
 C stand-alone codes for calibrations, online monitoring of running parameters
 C stand-alone codes for efficiency calculations, dead times
 usual fortran code “externals” for radiative corrections
 Acceptance corrections: single arm Hall C Monte Carlo (fortran)
 stand-alone C code to extract background (positron) cross sections
 Cross section analysis/extraction: C analysis package developed for Rosen07 & Rosen05
(by Vahe Mamyan) maintained by S. Malace
S. Malace will be running this package to finalize the Rosen07 analysis; eventually work with
Deb/W&M student (?) to customize it for the E12-10-002 analysis
E12-10-002: Analysis Plan
Online/Offline Analysis:
 Coordinator: S. Malace
E. Christy (back-up)
 Students: Deb Biswas (Hampton U., E. Christy - supervisor)
W&M student (Lauren) ? (S. Malace - supervisor)
 Software:
 Hall C C++ Analyzer: decoding, produce root files with physics, analysis variables
 C stand-alone codes for calibrations, online monitoring of running parameters
 C stand-alone codes for efficiency calculations, dead times
 usual fortran code “externals” for radiative corrections
 Acceptance corrections: single arm Hall C Monte Carlo (fortran)
 stand-alone C code to extract background (positron) cross sections
 Cross section analysis/extraction: C analysis package developed for Rosen07 & Rosen05
(by Vahe Mamyan) maintained by S. Malace
We will set up a wiki page where we will post the work done in preparation for running,
final run plan, links to documentation…
Summary
 E12-10-002 run plan will be finalized within a month
 E12-10-002/E12-10-008/E12-06-105 combined run plan will be finalized soon
 Preparation for online analysis will start next month:
 Hall C C++ Analyzer for analysis of inclusive experiments
 calibrations codes
 monitoring codes to check efficiencies, dead times, other running parameters online in
real time
 We assume the following will be completed before we start the physics run:
 Beamline BPMs and Harps (additional new BPM to monitor the beam position downstream from target)
 BCM calibration
 Beam energy measurement
 Target boiling studies on H and D, rate dependence studies on Carbon
 HMS & SHMS detector checkout:
 take data for calibration and to verify trigger efficiency, tracking, Cherenkov and Calorimeter cut
efficiencies, Cherenkov and Calorimeter pion rejection factor (both spectrometers)
 SHMS & HMS optics
 ?