LBNE R&D Briefing May 12, 2014 LBNE R&D Briefing May 12, 2014 LArIAT and LBNE Jim Stewart LArIAT...
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LBNE R&D Briefing May 12, 2014 LBNE R&D Briefing May 12, 2014 LArIAT and LBNE Jim Stewart LArIAT EPAG Chair BNL LBNE LARIAT-EPAG J. Stewart BNL T. Junk
LBNE R&D Briefing May 12, 2014 LBNE R&D Briefing May
12, 2014 LArIAT and LBNE Jim Stewart LArIAT EPAG Chair BNL LBNE
LARIAT-EPAG J. Stewart BNL T. Junk FNAL B. Rebel FNAL J. Urheim
IU
Slide 2
The LArIAT experiment LArIAT is a test beam experiment designed
to measure details of the detector response to charged particles of
known energy and type. Only earlier LAr-TPC test beam was T32 at
JPARC. 1cm readout strip and limited statistics. Kaon data. LArIAT
will be the first precision charged particle test beam! The
experiment is being assembled at FNAL Test Beam Facility (FTBF).
The experiment is foreseen as taking place in several phases Phase
I renovate the ArgoNeuT TPC and add a new cryogenics system. Phase
II will re-use the cryogenics system and add a larger TPC to
provide hadronic shower containment. Phase I should take data
starting in 2014 Phase II could take data starting in late 2016
2LBNE R&D Briefing - May 12, 2014
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LArIAT Test Beam Particles and Particles in LBNE Test beam
provides good coverage for beam physics and proton decay. LBNEs
requirements for SN and atmospheric need to be defined. How LArIAT
can contribute needs to be investigated. 6LBNE R&D Briefing -
May 12, 2014 LArIAT beam setup Particles in the LBNE Detector
Slide 7
Summary Phase I differences to LBNE LArIAT Phase I Two
instrumented planes 4 mm wire pitch 60 wire angle collection 60
wire angle induction BNL Front end preamp and CAEN digitizers
Default Drift Field 500 V/cm Max drift time 295 s Similar particle
coverage LBNE Three instrumented planes 5 mm wire pitch Vertical
collection 45 or ~35 stereo angle BNL front end, cold ADC, LBNE
prototype readout Drift Field 500 V/cm Max drift time 2160 s
Similar particle coverage The performance of the LArIAT TPC will be
measured, but a MC model will be needed to extrapolate to the LBNE
geometry! 7LBNE R&D Briefing - May 12, 2014
Slide 8
Goals of LArIAT Phase I Measure the detector response dE/dx to
known particles p e k and photons Precision measurement of the
collected charge as a function of particle type and energy. Measure
visible energy deposition for different particles and energies.
Determine the detection efficiencies and PID likelihoods
Investigate vertex fitting and tracking. 0.28 1.28 X 0 radiator for
investigating e 8LBNE R&D Briefing - May 12, 2014
Slide 9
LArIAT Phase I goals Single track calibration Electron and
photon shower separation Charge sign determination from decay
topolpgy Particle Identification by dE/dx and range proton to kaon
identification efficiency and purity/rejection factor k to /
identification efficiency and purity/rejection factor Pion/Kaon
Argon interactions cross sections Antiproton decay with full event
topology 9LBNE R&D Briefing - May 12, 2014
Slide 10
Sources of Detector Performance Estimates Detector response is
presently based on the ICARUS performance (different geometry) and
limited statistics visual scans of simulated data. 10LBNE R&D
Briefing - May 12, 2014
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Other things they could do Study planes with different wire
pitch and angle Rotate the detector Move the detector to a higher
energy beam Photon Beam??? LBNE R&D Briefing - May 12,
201411
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LBNE R&D Briefing - May 12, 201412
http://arxiv.org/pdf/1306.1712.pdf
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LBNE R&D Briefing May 12, 2014 LBNE R&D Briefing May
12, 2014 LArIAT Phase II
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The details of the phase II detector have not yet been fixed
and the experiment is open to feedback. Detectors with typical size
of 1 m radius and 3 m length are presently considered. Such a
detector will contain 90% of the total pion energy on average and
at least 20% of those pions will have 95% of their energy
contained. The effect of the limited containment for hadron showers
on the ability to define the LBNE detector precision has not been
studied in detail. Studies examining the impact of the missing
energy should be performed. Having a large library of events
generated from known particles will be very useful in developing
the Monte Carlo simulations. Will provide a wealth of hadron
interaction data which will provide input to GEANT. 14LBNE R&D
Briefing - May 12, 2014
Slide 15
LBNE Detector Requirements and Present Uncertainties 15LBNE
R&D Briefing - May 12, 2014
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Precision Detector Calibration A detector calibration
measurement should be performed with a detector as similar to the
final detector as possible. Wire pitch, angle, plane spacing, field
configuration, readout electronics should be near final. The
configuration for LBNE will likely only be fixed around CD-3.
International contributions may include entire detectors which
could imply more than one configuration. Cold Digital readout is
still in development and will not be finished until after CD-3.
Will define the time scale when an LBNE calibration measurement can
be performed. 16LBNE R&D Briefing - May 12, 2014
Slide 17
Possible Calibration Measurements LArIAT phase II Stand alone
test beam experiment. Availability is no issue. Hadronic showers
only contained at 90% level. Input on the setup should be provided
by LBNE. Long term availability provides flexibility in the testing
program. WA 104 (T150) Funding still under negotiation. 3 m by 10 m
will give good containment. May not be available if short baseline
program goes forward. WA 105 Primarily for development of the two
phase detector. Negotiating installing pre-production prototypes of
the LBNE TPC. Will give best calibration measurement as it is with
the final detector. Provides only possibility for a cold test of
the final detector. Long term availability may be limited. 17LBNE
R&D Briefing - May 12, 2014
Slide 18
Technical Contributions LArIAT is a good test bench to measure
energy loss and related light yield. Long term beam availability
will permit detailed measurements of performance as functions of
electric field and purity. Provides a facility where new ideas can
be tested. If a precision LBNE calibration measurement becomes a
LArIAT goal then a contribution to the electronics development
would be natural if funding is available. Electronics
considerations: Critical for LBNE design. Could enable a more
flexible design. Would reduce project cost. 18LBNE R&D Briefing
- May 12, 2014
Slide 19
Impact LArIAT will have on LBNE detector performance
uncertainties LArIAT Phase I will measure a precision data set
which will provide the most accurate measurements of its PID
capabilities and its efficiencies. There is no detailed software
study of the projected performance as the reconstruction software
is not sufficiently advanced. Estimates of the projected
uncertainties for the LBNE detector are not available and will
depend on software development. Discussions with LArIAT on further
studies are needed. Many Possibilities: LBNE plane configuration
and rotated detector LArIAT Phase II Can in the short term provide
a large set of fully contained hadron showers of great value for MC
development. Is the most flexible possibility for a future
precision LBNE calibration measurement. Cannot accommodate a full
size detector cell. Other possibilities in the global context need
to be understood. The possibility to develop the next generation
electronics readout in cooperation with LArIAT should be explored.
19LBNE R&D Briefing - May 12, 2014
Slide 20
Conclusions The LArIAT-EPAG is still assessing and documenting
the possible impacts LArIAT could have on LBNE. The process of
prioritizing the impacts needs to be done. We hope to have a draft
report to the RDCC ready soon. LBNE R&D Briefing - May 12,
201420