LArIAT and LBNE

1. LArIAT and LBNE LBNE LARIAT-EPAG J. Stewart BNL T. Junk FNAL B. Rebel FNAL J. Urheim IU Jim Stewart LArIAT EPAG Chair BNL

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 LBNE R&D Briefing - May 12, 2014

3. LBNE R&D Briefing - May 12, 2014

4. LBNE R&D Briefing - May 12, 2014

5. LBNE R&D Briefing - May 12, 2014

6. LArIAT Test Beam Particles and Particles in LBNE • Test beam provides good coverage for beam physics and proton decay. • LBNE’s requirements for SN and atmospheric need to be defined. • How LArIAT can contribute needs to be investigated. LArIAT beam setup Particles in the LBNE Detector LBNE R&D Briefing - May 12, 2014

7. Summary Phase I differences to LBNE LArIAT Phase I 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 μs Similar particle coverage • 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 μs • 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! LBNE R&D Briefing - May 12, 2014

8. Goals of LArIAT Phase I • Measure the detector response dE/dx to known particles p e± π± 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 X0 radiator for investigating γe± LBNE R&D Briefing - May 12, 2014

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 kaonidentification efficiency and purity/rejection factor • k to π/μ identification efficiency and purity/rejection factor • Pion/Kaon Argon interactions cross sections • Antiproton decay with full event topology LBNE R&D Briefing - May 12, 2014

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. LBNE R&D Briefing - May 12, 2014

11. 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, 2014

12. http://arxiv.org/pdf/1306.1712.pdf LBNE R&D Briefing - May 12, 2014

13. LArIAT Phase II

14. LArIAT Phase II • 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. LBNE R&D Briefing - May 12, 2014

15. LBNE Detector Requirements and Present Uncertainties LBNE R&D Briefing - May 12, 2014

16. 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. LBNE R&D Briefing - May 12, 2014

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. LBNE R&D Briefing - May 12, 2014

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. LBNE R&D Briefing - May 12, 2014

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 it’s 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. LBNE R&D Briefing - May 12, 2014

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, 2014