The US Liquid Argon Time Projection Chamber (LArTPC) experiments

The US Liquid Argon Time Projection Chamber (LArTPC) experiments outline 1. Introduction 2. ArgoNeuT experiment 3. MicroBooNE experiment 4. Future large LArTPC experiments 5. Conclusion Teppei Katori for MicroBooNE collaboration Massachusetts Institute of Technology Neutrino-Nucleus Interactions in the Few-GeV Region (NuInt11) Dehradun, Uttarkhand, India, March 7, 2011 03/07/2011 Teppei Katori, MIT 1

1. Introduction 2. ArgoNeuT experiment 3. MicroBooNE experiment 4. Future large LArTPC experiments 5. Conclusion 03/07/2011 Teppei Katori, MIT 2

1. What is LArTPC? a modern bubble chamber experiment The principle of LArTPC - 3D track reconstruction 03/07/2011 Teppei Katori, MIT 3

ν 1. What is LArTPC? a modern bubble chamber experiment The principle of LArTPC - 3D track reconstruction Charged particle tracks ionize Argon atoms 40 Ar 03/07/2011 Teppei Katori, MIT 4

1. What is LArTPC? a modern bubble chamber experiment The principle of LArTPC - 3D track reconstruction Charged particle tracks ionize Argon atoms Scintillation light (~ns) is detected by PMTs at same time 03/07/2011 Teppei Katori, MIT 5

1. What is LArTPC? a modern bubble chamber experiment The principle of LArTPC - 3D track reconstruction Then ionized electrons are collected by anode wires (~ms) 03/07/2011 Teppei Katori, MIT 6

1. What is LArTPC? a modern bubble chamber experiment The principle of LArTPC - 3D track reconstruction Then ionized electrons are collected by anode wires (~ms) Electrons near the wires are collected first, and electrons far from the wires are collected last, so drift coordinate information is converted to electron drift time (time is projected) 03/07/2011 Teppei Katori, MIT 7

1. Why LArTPC? A candidate large neutrino detector LArTPC vs Water Cherenkov detector - 6 times smaller mass LArTPC has same sensitivity with large Water Cherenkov detector for CPV - Using de/dx and separation of vertex and photon conversion point, essentially no misid between single electron and photon conversion 300kt Water Cherenkov detector Energy loss in the first 24mm of track: 250MeV single electron vs 250MeV photon conversion 50kt LArTPC detector 03/07/2011 Teppei Katori, MIT 8

1. Where are we? We need to demonstrate! US path to future large LArTPC - The 0.7 ton ArgoNeuT was successfully completed. - We are ready for 150 ton MicroBooNE experiment. - future goal is the 20k ton detector (LAr20). 100% R&D 50%R&D 50%Physics 100% Physics 03/07/2011 Teppei Katori, MIT 9

1. Introduction 2. ArgoNeuT experiment 3. MicroBooNE experiment 4. Future large LArTPC experiments 5. Conclusion 03/07/2011 Teppei Katori, MIT 10

2. ArgoNeuT First US LArTPC neutrino experiment - NuMI neutrino beamline (wideband 3GeV beam with long tail up to 20GeV) - 1.35E20 POT, dominated with anti-neutrino mode (~12k total neutrino event in TPC volume) - small fiducial mass (0.25ton), but using MINOS near detector as muon ranger cryostat volume TPC volume ArgoNeuT 0.7 ton 0.25 ton # channel 480 wire pitch Reaction type ν µ CC electronics style 4 mm JFET (293K) #events (TPC volume) ~6.6k anti-ν µ CC ~5k ν µ CCQE ~600 ν e CC ~130 Argo- NeuT Neutrinos MINOS near detector hall MINOS near detector max. drift length 0.5m (330µs) 03/07/2011 Teppei Katori, MIT 11 light collection none

2. ArgoNeuT First US LArTPC neutrino experiment - NuMI neutrino beamline (wideband 3GeV beam with long tail up to 20GeV) - 1.35E20 POT, dominated with anti-neutrino mode (~12k total neutrino event in TPC volume) - small fiducial mass (0.25ton), but using MINOS near detector as muon ranger test TPC Bo ArgoNeuT demonstrates LArTPC neutrino analysis - wire signals are Fourier deconvoluted Cosmic ray data electron neutrino candidate event (single EM shower) Filter function ArgoNeuT cryostat volume 0.7 ton TPC volume 0.25 ton # channel 480 wire pitch 4 mm electronics style JFET (293K) max. drift length 0.5m (330µs) 03/07/2011 Teppei Katori, MIT 13 light collection none Raw data Deconvoluted data

2. ArgoNeuT First US LArTPC neutrino experiment - NuMI neutrino beamline (wideband 3GeV beam with long tail up to 20GeV) - 1.35E20 POT, dominated with anti-neutrino mode (~12k total neutrino event in TPC volume) - small fiducial mass (0.25ton), but using MINOS near detector as muon ranger ArgoNeuT demonstrates LArTPC neutrino analysis - wire signals are Fourier deconvoluted - powerful reconstruction software, LArSoft Hit: location in time on a wire where signal is present Cluster: collection of hits that are near each other in time and space Prong: collection of clusters that occupy the same time and space Shower, Track, etc: higher reconstruction objects ArgoNeuT cryostat volume 0.7 ton TPC volume 0.25 ton # channel 480 wire pitch 4 mm electronics style JFET (293K) max. drift length 0.5m (330µs) 03/07/2011 Teppei Katori, MIT 14 light collection none

2. ArgoNeuT First US LArTPC neutrino experiment - NuMI neutrino beamline (wideband 3GeV beam with long tail up to 20GeV) - 1.35E20 POT, dominated with anti-neutrino mode (~12k total neutrino event in TPC volume) - small fiducial mass (0.25ton), but using MINOS near detector as muon ranger ArgoNeuT demonstrates LArTPC neutrino analysis - wire signals are Fourier deconvoluted - powerful reconstruction software, LArSoft Reconstructed CCQE candidate event ArgoNeuT talk in QE session! (by J. Spitz) ArgoNeuT cryostat volume 0.7 ton TPC volume 0.25 ton # channel 480 wire pitch 4 mm electronics style JFET (293K) max. drift length 0.5m (330µs) 03/07/2011 Teppei Katori, MIT 15 light collection none

1. Introduction 2. ArgoNeuT experiment 3. MicroBooNE experiment 4. Future large LArTPC experiments 5. Conclusion 03/07/2011 Teppei Katori, MIT 16

3. MicroBooNE Path to large scale LArTPC experiment - Booster neutrino beamline (wideband 800MeV beam with short tail up to 3GeV), 6E20POT - technological goal: path to large LArTPC, all parameters are improved from ArgoNeuT Fermilab overview Booster Target Hall MicroBooNE MicroBooNE detector ArgoNeuT MicroBooNE cryostat volume 0.7 ton 150 ton TPC volume 0.25 ton 86 ton max. drift length 0.5m (330µs) 2.5m (1.5ms) electronics style JFET (293K) CMOS (87K) # channel 480 ~9000 wire pitch 4 mm 3 mm # wire plane 2 3 03/07/2011 Teppei Katori, MIT 17 light collection none 30 of 8 PMT

3. MicroBooNE Path to large scale LArTPC experiment - Booster neutrino beamline (wideband 800MeV beam with short tail up to 3GeV), 6E20POT - technological goal: path to large LArTPC, all parameters are improved from ArgoNeuT - physics goal: investigate MiniBooNE low energy excess - bigger volume (~71k νccqe, 112k νcc in TPC volume, 6E20POT) - longer drift length (high purity LAr) Liquid Argon Purity Demonstrator (LAPD) tank ArgoNeuT MicroBooNE cryostat volume 0.7 ton 150 ton TPC volume 0.25 ton 86 ton max. drift length 0.5m (330µs) 2.5m (1.5ms) electronics style JFET (293K) CMOS (87K) # channel 480 ~9000 wire pitch 4 mm 3 mm MicroBooNE detector filters # wire plane 2 3 03/07/2011 Teppei Katori, MIT 20 light collection none 30 of 8 PMT

3. MicroBooNE Path to large scale LArTPC experiment - Booster neutrino beamline (wideband 800MeV beam with short tail up to 3GeV), 6E20POT - technological goal: path to large LArTPC, all parameters are improved from ArgoNeuT - physics goal: investigate MiniBooNE low energy excess - bigger volume (~71k νccqe, 112k νcc in TPC volume, 6E20POT) - longer drift length (high purity LAr) Liquid Argon Purity Demonstrator (LAPD) material test cryostat Luke tank ArgoNeuT MicroBooNE cryostat volume 0.7 ton 150 ton TPC volume 0.25 ton 86 ton max. drift length 0.5m (330µs) 2.5m (1.5ms) electronics style JFET (293K) CMOS (87K) # channel 480 ~9000 wire pitch 4 mm 3 mm MicroBooNE detector # wire plane 2 3 03/07/2011 Teppei Katori, MIT 21 light collection none 30 of 8 PMT filters

3. MicroBooNE Path to large scale LArTPC experiment - Booster neutrino beamline (wideband 800MeV beam with short tail up to 3GeV), 6E20POT - technological goal: path to large LArTPC, all parameters are improved from ArgoNeuT - physics goal: investigate MiniBooNE low energy excess - bigger volume (~71k νccqe, 112k νcc in TPC volume, 6E20POT) - longer drift length (high purity LAr) - cold electronics (pre-amp, immersed in LAr) Cryogenic CMOS front end prototype (87K) ArgoNeuT MicroBooNE cryostat volume 0.7 ton 150 ton TPC volume 0.25 ton 86 ton max. drift length 0.5m (330µs) 2.5m (1.5ms) electronics style JFET (293K) CMOS (87K) # channel 480 ~9000 wire pitch 4 mm 3 mm MicroBooNE detector # wire plane 2 3 03/07/2011 Teppei Katori, MIT 22 light collection none 30 of 8 PMT

3. MicroBooNE Path to large scale LArTPC experiment - Booster neutrino beamline (wideband 800MeV beam with short tail up to 3GeV), 6E20POT - technological goal: path to large LArTPC, all parameters are improved from ArgoNeuT - physics goal: investigate MiniBooNE low energy excess - bigger volume (~71k νccqe, 112k νcc in TPC volume, 6E20POT) - longer drift length (high purity LAr) - cold electronics (pre-amp, immersed in LAr) - finer wire pitch (40MeV proton track is ~1.5cm in LAr) Wire plane prototype MicroBooNE detector ArgoNeuT MicroBooNE cryostat volume 0.7 ton 150 ton TPC volume 0.25 ton 86 ton max. drift length 0.5m (330µs) 2.5m (1.5ms) electronics style JFET (293K) CMOS (87K) # channel 480 ~9000 wire pitch 4 mm 3 mm # wire plane 2 3 03/07/2011 Teppei Katori, MIT 23 light collection none 30 of 8 PMT

3. MicroBooNE Path to large scale LArTPC experiment - Booster neutrino beamline (wideband 800MeV beam with short tail up to 3GeV), 6E20POT - technological goal: path to large LArTPC, all parameters are improved from ArgoNeuT - physics goal: investigate MiniBooNE low energy excess - bigger volume (~71k νccqe, 112k νcc in TPC volume, 6E20POT) - longer drift length (high purity LAr) - cold electronics (pre-amp, immersed in LAr) - finer wire pitch (40MeV proton track is ~1.5cm in LAr) - light collection system behind the wire planes (it can trigger 40MeV proton) MicroBooNE PMT test stand TPB coated acrylic plate MicroBooNE detector 128nm ArgoNeuT cryostat volume 0.7 ton MicroBooNE 450nm 150 ton TPC volume 0.25 ton 90 ton max. drift length 0.5m (330µs) 2.5m (1.5ms) electronics style CMOS (87K) # channel JFET (293K) PMT unit 480 wire pitch 4 mm 3 mm # wire plane 2 3 light collection none 30 of 8 PMT 03/07/2011 ~9000 Teppei Katori, MIT 24

3. MicroBooNE Path to large scale LArTPC experiment - Booster neutrino beamline (wideband 800MeV beam with short tail up to 3GeV), 6E20POT - technological goal: path to large LArTPC, all parameters are improved from ArgoNeuT - physics goal: investigate MiniBooNE low energy excess - bigger volume (~71k νccqe, 112k νcc in TPC volume, 6E20POT) - longer drift length (high purity LAr) - cold electronics (pre-amp, immersed in LAr) - finer wire pitch (40MeV proton track is ~1.5cm in LAr) - light collection system behind the wire planes (it can trigger 40MeV proton) In a nutshell MicroBooNE is a large volume high resolution active target detector (we can see the back of ICARUS!) ArgoNeuT MicroBooNE cryostat volume 0.7 ton 150 ton TPC volume 0.25 ton 86 ton max. drift length 0.5m (330µs) 2.5m (1.5ms) electronics style JFET (293K) CMOS (87K) # channel 480 ~9000 wire pitch 4 mm 3 mm MicroBooNE detector # wire plane 2 3 03/07/2011 Teppei Katori, MIT 25 light collection none 30 of 8 PMT

3. MicroBooNE physics Event rate (BNB, 86ton TPC volume, 6E20POT) 63 ton reaction #event fraction CCQE CC ν µ +n >µ - +p 71135 45.0 NCEL NC ν µ +N >ν µ +N 22949 14.5 resonance pion production coherent pion production CC ν µ +p >µ - +p+π + 21837 13.8 CC ν µ +n >µ - +p+π o 8270 5.2 CC ν µ +n >µ - +n+π + 7900 5.0 NC ν µ +p >ν µ +p+π o 3898 2.5 NC ν µ +p >ν µ +n+π + 2464 1.6 NC ν µ +n >ν µ +n+π o 4838 3.1 NC ν µ +n >ν µ +p+π - 3207 2.0 CC ν µ +A >µ - +A+π + 3105 2.0 NC ν µ +A >ν µ +A+π o 2003 1.3 total 151606 96.0 03/07/2011 Teppei Katori, MIT 26

3. MicroBooNE physics, Δs ν µ + p ν µ + p ν µ + n ν µ + n Neutral Current Elastic (NCE) event (23k in TPC volume, 6E20POT) - MiniBooNE: no proton-neutron separation below 350 MeV (proton Cherenkov threshold). - SciBooNE: hard to understand low energy protons (>200 MeV for analysis). MiniBooNE collaboration, PRD82(2010)092005 H. Takei, Fermilab-Thesis-2009-19 - LArTPC can measure low energy protons (~40MeV protons corresponds to Q 2 ~0.08 GeV 2 ). BNL734 data ICARUS proton dq/dx MicroBooNE - lowest reconstructable projected data points proton is ~50 MeV ICARUS collaboration PRD74(2006)112001 Δs, strange quark spin components in nucleon - Δs is Q 2 =0 limit of the isoscalar part of axial vector form factor of NCE events. - previous experiments (BNLE734, MiniBooNE) are limited Q 2 > 0.4 GeV 2. unmeasured Ahrens et al, PRD35(1987)785 03/07/2011 Teppei Katori, MIT 27

3. MicroBooNE physics, coherent pion production Recent data of coherent pion productions - No charged current coherent pion production is observed. - Neutral current coherent pion production is observed. K2K collaboration, PRL95(2005)252301 MiniBooNE collaboration, PLB664(2008)41; PRD82(2010)092005 ν µ + A µ + A + π + ν µ + A µ + A + π o SciBooNE collaboration, PRD78(2008)112004 SciBooNE collaboration, PRD81(2009)033004; PRD81(2010)111102 Vertex activity - SciBooNE uses energy deposit around vertex (called vertex activity) to distinguish coherent and resonance pion production. - 3mm coordinate resolution of MicroBooNE allows fine pion measurement and vertex activity. SciBooNE νccπ + sample vertex activity MicroBooNE expected events in TPC volume (6E20POT) νccqe νccπ + (resonance) νccπ + (coherent) νncπ o (resonance) νncπ o (coherent) events 72k 30k 3k 14k 2k 03/07/2011 Teppei Katori, MIT 28

3. MicroBooNE physics, ν2nsrc Cartoon of inside of nucleus 2 Nucleon Short Range Correlation (2NSRC) - for heavy nuclei, ~20% of nucleons are under SRC, JLab Hall A collabo. and proton-neutron pairs dominate (~90%). - 2 nucleons are emitted opposite directions JLab Hall A collabo. PRL99(2007)072501 Science320(2008)1476 JLab Hall A big bite correlated proton pair measurement 03/07/2011 Teppei Katori, MIT 29

3. MicroBooNE physics, ν2nsrc Cartoon of inside of nucleus 2 Nucleon Short Range Correlation (2NSRC) - for heavy nuclei, ~20% of nucleons are under SRC, and proton-neutron pairs dominate (~90%). - 2 nucleons are emitted opposite directions JLab Hall A collabo. Science320(2008)1476 JLab Hall A collabo. PRL99(2007)072501 neutrino 2NSRC (ν2nsrc) - Growing interest on this subject, why not with neutrinos!? Berge et al., - Never confirmed in neutrino scattering PRD18(1978)1367 - Unique place to study the role of 2NSRC on nuclear transition electron scattering - long arm spectrometers target detectors neutrino scattering - active target, vertex detector target and detector? vertex activity 03/07/2011 Teppei Katori, MIT 32

3. MicroBooNE physics, ν2nsrc Cartoon of inside of nucleus 2 Nucleon Short Range Correlation (2NSRC) - for heavy nuclei, ~20% of nucleons are under SRC, and proton-neutron pairs dominate (~90%). - 2 nucleons are emitted opposite directions ν µ + X(np) X + µ + p + p JLab Hall A collabo. Science320(2008)1476 JLab Hall A collabo. PRL99(2007)072501 neutrino 2NSRC (ν2nsrc) - Growing interest on this subject, why not with neutrinos!? Berge et al., - Never confirmed in neutrino scattering PRD18(1978)1367 - Unique place to study the role of 2NSRC on nuclear transition - Responsible for MiniBooNE absolute xs measurements? ν2nsrc at MicroBooNE - Very distinct event topology (CM frame) muon + 2 protons back-to-back emission - High resolution LATPC can measure 2 short proton tracks - Vertex activity might reveal the first time the role of 2NSRC on nuclear transition MiniBooNE collaboration, PRD81(2010)092005 ArgoNeuT 2 tracks CCQE candidate in 3D (data) 03/07/2011 Teppei Katori, MIT 34

3. MicroBooNE physics, NuMI neutrinos MicroBooNE receives neutrinos both from Booster Neutrino beam (BNB) and NuMI! - upgrade 700kW NuMI will have 6E20POT/yr. - 40k νcc event and 7.7k anti-νcc event from NuMI, 6E20POT. MicroBooNE detector MicroBooNE detector 03/07/2011 Teppei Katori, MIT 35

3. MicroBooNE physics, hyperon production MicroBooNE receives neutrinos both from Booster Neutrino beam (BNB) and NuMI! - upgrade 700kW NuMI will have 6E20POT/yr. - 40k νcc event and 7.7k anti-νcc event from NuMI, 6E20POT. Neutrino-Nucleon hyperon productions - High resolution detector allows hyperon measurements - Very low statistics (26 events) from 70 bubble chambers Λ production measurements - Uniquely sensitive to anti-neutrino - No Pauli blocking - Λ polarization? Neutrino78(1978)37, PRL33(1975)1446 ν µ + p µ + + Λ o ν µ + p µ + + Σ o MicroBooNE capability - We expect few 100s of Λ o s in TPC volume, from NuMI, 6E20POT. ArgoNeuT Λ o production (MC) ν µ + p µ + + Λ o Λ o p + π 03/07/2011 Teppei Katori, MIT 36

1. Introduction 2. ArgoNeuT experiment 3. MicroBooNE experiment 4. Future large LArTPC experiments 5. Conclusion 03/07/2011 Teppei Katori, MIT 37

4. Long Baseline Neutrino Experiment (LBNE) LAr20 for LBNE - LBNE will be located ~1300km from Fermilab. - Main injector based ~2MW neutrino factory is used for θ 13 search and CPV measurement. - Large LArTPC (LAr20) is a candidate detector for LBNE anode ArgoNeuT MicroBooNE LAr20 cryostat volume 0.7 ton 150 ton 25k ton TPC volume 0.25 ton 86 ton 16.8k ton cathode max. drift length 0.5m (330µs) 2.5m (1.5ms) 2.5m (1.4ms) electronics style JFET (293K) CMOS (87K) CMOS (87K) # channel 480 ~9000 ~645,000 wire pitch 4 mm 3 mm 3 mm # wire plane 2 3 3 03/07/2011 Teppei Katori, MIT 38 light collection none 30 of 8 PMT TBD

5. Conclusion LArTPC is a feasible candidate large detector for future long baseline neutrino oscillation experiment, such as LBNE ArgoNeuT is the first US LArTPC neutrino experiment, and successfully completed its data taking 150ton MicroBooNE is planned to take data from 2013. MicroBooNE is the necessary path for future large LArTPC and it has a rich physics program. 03/07/2011 Teppei Katori, MIT 39

MicroBooNE collaboration Brookhaven National Laboratory Columbia University University of Cincinnati Fermi National Accelerator Laboratory Kansas State University Los Alamos National Laboratory Massachusetts Institute of Technology Michigan State University Princeton University Saint Mary's University of Minnesota Syracuse University University of Texas, Austin Yale University Thank you for your attention! 03/07/2011 Teppei Katori, MIT 40

back up 03/07/2011 Teppei Katori, MIT 41

4. Why Argon? Noble gas comparison - lower boiling point is easier to handle - higher density has more energy deposit - longer wavelength is easier to detect - Xe>Kr>Ar>Ne>He but Xe and Kr are expensive 03/07/2011 Teppei Katori, MIT 42

3. MicroBooNE Event rate (BNB, 6E20POT) 63.5 ton 03/07/2011 Teppei Katori, MIT 43

3. MicroBooNE Event rate (NuMI, 6E20POT) 03/07/2011 Teppei Katori, MIT 44

ν 1. What is LArTPC? a modern bubble chamber experiment The principle of LArTPC - 3D track reconstruction Charged particle tracks ionize Argon atoms Scintillation light (very fast) are detected by PMTs same time Then ionized electron are corrected by anode wire by drift field (~500V/cm) Electrons near the wire are collected first, and electrons fur from the wire are collected last (Z-axis information is converted to electron drift time) 03/07/2011 Teppei Katori, MIT 45 45

4. LArTPC all over the world ICARUST600@Gran Sasso - physics run is ongoing at Gran Sasso LArTPC@KEK - ready to run ArgoNeuT size (250L) LArTPC with 2 phase (upper gas phase for LEM) ARGONTUBE@Swiss group - goal is to demonstrate ~5m electron drift (210 stage Cockcroft-Walton inside of cryostat) 03/07/2011 Teppei Katori, MIT 46

2. ArgoNeuT First US LArTPC neutrino experiment - NuMI neutrino beamline (wideband 3GeV beam with long tail up to 20GeV) - 1.35E20 POT, dominated with anti-neutrino mode (~12k total neutrino event) - small fiducial mass (0.25ton), but using MINOS near detector as muon ranger (0.5GeV<Tµ(max)<5GeV, depending on angle) - Neutrino interactions are viewed in 2 of 2D planes (=3D reconstuctable) A neutrino event (CC DIS event with 2π o production) ArgoNeuT cryostat volume 0.7 ton TPC volume 0.25 ton # channel 480 wire pitch 4 mm electronics style JFET (293K) max. drift length 0.5m (330µs) 03/07/2011 Teppei Katori, MIT 47 light collection none

2. ArgoNeuT First US LArTPC neutrino experiment - NuMI neutrino beamline (wideband 3GeV beam with long tail up to 20GeV) - 1.35E20 POT, dominated with anti-neutrino mode (~12k total neutrino event) - small fiducial mass (0.25ton), but using MINOS near detector as muon ranger (0.5GeV<Tµ(max)<5GeV, depending on angle) - Neutrino interactions are viewed in 2 of 2D planes (=3D reconstuctable) - Gamma ray looks 2 MIP particles (= separable from electron) e γ e + e - cryostat volume TPC volume ArgoNeuT 0.7 ton 0.25 ton # channel 480 wire pitch electronics style 4 mm JFET (293K) Single wire information from data max. drift length 0.5m (330µs) 03/07/2011 Teppei Katori, MIT 48 light collection none

2. ArgoNeuT First US LArTPC neutrino experiment - NuMI neutrino beamline (wideband 3GeV beam with long tail up to 20GeV) - 1.35E20 POT, dominated with anti-neutrino mode (~12k total neutrino event) - small fiducial mass (0.25ton), but using MINOS near detector as muon ranger (0.5GeV<Tµ(max)<5GeV, depending on angle) - Neutrino interactions are viewed in 2 of 2D planes (=3D reconstuctable) - Gamma ray looks 2 MIP particles (= separable from electron) - powerful de/dx PID de/dx from CCQE candidate tracks - precise event-by-event PID by de/dx! ArgoNeuT cryostat volume 0.7 ton TPC volume 0.25 ton # channel 480 wire pitch 4 mm electronics style JFET (293K) max. drift length 0.5m (330µs) 03/07/2011 Teppei Katori, MIT 49 light collection none

3. MicroBooNE Path to large scale LArTPC experiment - Booster neutrino beamline (wideband 800MeV beam with short tail up to 3GeV), 6E20POT - technological goal: path to large LArTPC, all parameters are improved from ArgoNeuT - physics goal: investigate MiniBooNE low energy excess - bigger volume (~72k νccqe, 115k νcc in TPC volume, 6E20POT) - longer drift length (high purity LAr) - cold electronics (pre-amp, immersed in LAr) - finer wire pitch (40MeV proton track is ~1.5cm in LAr) - 3 wire planes (more complicated topologies are measured) ν Ambiguity occurs if track is parallel to wire plane ArgoNeuT 2 wire planes MicroBooNE cryostat volume 0.7 ton 150 ton TPC volume 0.25 ton 90 ton max. drift length 0.5m (330µs) 2.5m (1.5ms) electronics style JFET (293K) CMOS (87K) # channel 480 ~9000 wire pitch 4 mm 3 mm X T T X T MicroBooNE detector # wire plane 2 3 03/07/2011 Teppei Katori, MIT 50 light collection none 30 of 8 PMT Y Y

3. MicroBooNE Path to large scale LArTPC experiment - Booster neutrino beamline (wideband 800MeV beam with short tail up to 3GeV), 6E20POT - technological goal: path to large LArTPC, all parameters are improved from ArgoNeuT - physics goal: investigate MiniBooNE low energy excess - bigger volume (~72k νccqe, 115k νcc in TPC volume, 6E20POT) - longer drift length (high purity LAr) - cold electronics (pre-amp, immersed in LAr) - finer wire pitch (40MeV proton track is ~1.5cm in LAr) - 3 wire planes (more complicated topologies are measured) Ambiguity occurs if track is parallel to wire plane ArgoNeuT 3 wire planes MicroBooNE cryostat volume 0.7 ton 150 ton TPC volume 0.25 ton 90 ton max. drift length 0.5m (330µs) 2.5m (1.5ms) electronics style JFET (293K) CMOS (87K) # channel 480 ~9000 wire pitch 4 mm 3 mm X T T X T MicroBooNE detector # wire plane 2 3 03/07/2011 Teppei Katori, MIT 51 light collection none 30 of 8 PMT Y T Y U