PoS(NuFact2017)067 https://pos.sissa.it/ mass range. SBND will also perform detailed studies of the physics of 2 for the SBND Collaboration ∗ [email protected] Speaker. neutrino-argon interactions, thanks to ainteractions. data sample Finally of SBND millions plays of anLArTPC technology, important electron testing role and several in muon technologies the neutrino thattrino on-going can detectors R&D be for effort used a to in long-baseline develop astatus, the future experiment. and kiloton-scale the We neu- physics will program, discussment with the prospects. a detector particular design, focus its on current the neutrino cross-section measure- SBND (Short-Baseline Near(LArTPC) Detector) neutrino detector under is construction in the a Fermilabwith Booster MicroBooNE 112ton Neutrino Beam. and Together ICARUS-T600 liquid detectors,oscillations SBND argon in will the time search 1eV for projection short baseline chamber neutrino ∗ Copyright owned by the author(s) under the terms of the Creative Commons c Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0). The 19th International Workshop on Neutrinos25-30 from September, Accelerators-NUFACT2017 2017 Uppsala University, Uppsala, Sweden Nicola McConkey University of Sheffield E-mail: Neutrino cross-section measurement prospects with SBND PoS(NuFact2017)067 level. σ excess in σ ]. Nicola McConkey 4 source, observed a is around 1eV. µ 2 14 ], which was a decay ¯ ν 1 m ∆ 87 oscilllation to an additional “ster- . Subsequent measurements made 112 476 2 1 ]. The three detectors, with param- m 3 ∆ Active LAr mass (tonnes) . 1 channel. 1 e ¯ ν -> µ ¯ 110 470 600 ν Baseline (m) Parameters of the three SBN detectors. are functionally identical Liquid Argon Time Projection Chambers excess in the 1 Table 1: σ appearance channel, as is shown in figure e ¯ ν ] in the Booster Neutrino Beam (BNB) at Fermilab showed a 3.4 MicroBooNE ICARUS T-600 Detector SBND 2 The electron neutrino appearance (left) and muon neutrino disappearance (right) sensitivities of channel and a 2.4 e excess in the ν The Short Baseline Neutrino (SBN) Program is a three detector neutrino measurement pro- These oscillation excesses can be interpreted as a large The primary physics goal of the SBN programme is to measure neutrino oscillations in the SBND is the near detector for the SBND programme and will measure the unoscillated neu- Over the past 20 years there have been several experimental anomalies observed in neutrino σ -> µ gramme in the Booster Neutrino Beam (BNB) at Fermilab [ ile" neutrino state, which does not interact via the weak interaction. This ν eters as described in table Figure 1: the SBN program, in the context of the LSND measured values and global best fit from [ BNB beam, to definitively confirm or refute the results of LSND and MicroBooNE at the 5 at rest experiment measuring antineutrino oscillations from a decay-at-rest by MiniBooNE [ (LArTPC). The use of the sameatic nuclear uncertainties target and across detector the technology three reduce detector the system. effect of system- This experiment will measure both electron neutrinoThe appearance sensitivity and plots muon for neutrino disappearance. SBN are shown in figure experiments with baselines of theiments. order Most of notably <1km, the which Liquid are Scintillator referred Neutrino to Detector as (LSND) short [ baseline exper- 1. Introduction Neutrino cross-section measurement prospects with SBND 3.8 PoS(NuFact2017)067 4m, shows × 3 ]. 4m 6 × Nicola McConkey ] and DUNE [ 5 charged current and neutral e ν and µ ν 2 The Booster Neutrino Beam energy spectrum. Figure 2: angles to the vertical. The signal is collected at the outer edge of the APA, ◦ 60 ± . The drift direction is perpendicular to the neutrino beam direction. Each wire readout 3 SBND has a composite photon detector system, the baseline of which is an array of 8" Ham- SBND is a LAr TPC with charge and light readout. It has an active volume of 5m The central cathode (CPA) is a welded, electropolished assembly composed of stainless steel The SBND field cage is composed of roll formed aluminium profiles, with PE end caps. This In addition to providing near detector measurements for the SBN Program, the SBNDThe detector BNB is a low energy neutrino beam at Fermilab, produced from 8GeV protons on a . It is a muon neutrino beam with electron neutrino contamination of less than 0.5%, which is mamatsu R5912 photomultiplier tubes (PMT), coated in wavelength shifting tetraphenyl butadeine plane, or Anode Plane Assemblysupport (APA) 3 consists planes of of two copper-beryllium interconnected wires steel at APA frames, pitch which and plane spacing of 3mm. Figure 2. SBND Detector Design and current status the orientation and layout ofplanes these (U,V) wire at planes: a vertical collection plane (Y), and two induction well characterised and has been stablybeam running as for over the a MiniBooNE decade; detector. the SBN detectors sit in the same and there is a jumpered interconnect between the two APA frames. frames supporting mesh frames. Between thereflector layers foils of are conductive sandwiched, mesh, which wavelength enhance shifter theode coated uniformity will of light be collection biased in at SBND. Thecore -100kV, with cath- and a grounding sheath coaxial with high polyethylene voltage (PE)cathode feedthrough insulator donut bringing composed with this of a bias stainless spring-loaded in tip. steel and contacting the is identical to the field cage material which will be used in ProtoDUNE [ 2 Neutrino cross-section measurement prospects with SBND trino flux. SBND will have extremely high statistics for composed of two drift regions,figure with a central cathode, and two wire readout planes, as shown in allows us to study neutrino-nucleus interactions in argon with unprecedented sensitivity. beryllium target. The peak neutrino energy is at 700MeV, and the full spectrum is shown in figure current interactions, and will be usedlated to predictions tune for the the flux two and far cross-section detectors models MicroBooNE to and produce ICARUS. unoscil- PoS(NuFact2017)067 ]. 9 [ 4 Nicola McConkey 3 . The photon detection system is both a test-bed for new 4 ]. This composite light detector system is mounted behind each 8 ]. The light guide bars are composed of TPB coated acrylic strips, 7 Left: The SBND TPC. Centre: APA wire planes. Right: CPA mesh panel and frame. Left: The SBND photon detection system mounted behind the APAs. Right: Cosmic ray tagger Figure 3: The SBND LAr TPC gives full 3D imaging with millimetre granularity, allowing for precise Since SBND is situated at a distance of 110m from the target, it has an extremely high event As SBND is located at the surface with only a few metres concrete overburden, and in order Figure 4: system surrounding the SBND cryostat. measurement of topological and calorimetric information. 3. Neutrino cross section measurements rate for neutrino interactions. Combined with the excellent granularity of the detector, this makes to mitigate the cosmic ray backgroundscintillator in strips the read detector, out it by is MPPC, surrounded which by act seven planes as of a extruded cosmic ray tagger, as is shown in figure read out by an arraywire of readout SiPMs plane, [ as showntechnology, in and figure an excellent calorimetric tool with fast timing capabilities. (TPB). In addition to thisin SBND: system, the there ARAPUCA are and twodevice the which other light is proposed composed guide of bars. technologies dichroic foricon filters The on PhotoMultiplier light ARAPUCA a (SiPM) collection is highly [ a internally reflective novel box, photon read collection out by a Sil- Neutrino cross-section measurement prospects with SBND PoS(NuFact2017)067 . There 5 ]. sample, which 10 e Nicola McConkey ν POT, from GENIE 20 10 × events in 3 years. To put this e ν in the final state. events and 50,000 4 p 2 µ ν + , for which SBND will collect a total data set of several events, there will be a high statistics µ + µ Σ ν and 0 Λ ) are the dominant channel, which can be used to quantify nuclear π ], gives 7 million detectors, SBND will collect the entire MicroBooNE data set in just 2 3 CC events over the 3 year run. Measurements of this interaction will be ν e ν An neutrino-electron elastic scattering event recorded at ArgoNeut [ -Ar scattering. SBND will carry out a direct experimental investigation and quantifica- Figure 5: ν The BNB neutrino flux spectrum at SBND covers the neutrino energy at both the first and Since SBND has a high event rate of the unoscillated BNB, it is in an ideal position to perform In addition to the large number of With high statistics, detector granularity, and good particle identification, the study of exclu- The high interaction rate allows SBND to measure interaction channels which remain unmea- The estimated number of events in the SBND active volume for a 6.6 second oscillation maxima formeans DUNE, there at will energies be ofbaseline a oscillation high 2.6MeV measurements statistics in and argon. sample 0.8MeV of neutrino respectively. interactions This at energiesthe neutrino relevant beam to flux long normalisationon for electrons the is SBN a experiment. well TheLAr known TPC: elastic cross a scattering section, very of forward and electron neutrinos will with provide no a activity around unique the topological vertex, signature as is in shown the in figure will allow for both inclusive andwill exclusive be measurements for around electron 37,000 neutrino interactions.extremely beneficial There for both SBN and DUNE physics programmes. will be around 300 events expectedthe in flux for the the 3 neutrino year oscillation data measurements. run, and this will allow SBND to normalise thousand events over 3 years, more than the current historical data set in one month. sive neutrino interaction topologies is possible.no At pions SBND, Charged in Current the (CC) final interactions with state (0 sured on argon.example There production are of hyperons many rare interaction channels which can be probed by SBND, for in context of other LAr months. This will quickly reduce thesystematic statistical errors uncertainty dominant. to well below the percent level, making effects in tion of nuclear effects, measuring thestates impacts and of kinematics. interactions with This the datagling argon will neutrino-nuclear nucleus inform interaction on neutrino phenomenology rates, by monte-carlo discriminating final generators, betweenmodels. and final One state aid example interaction in of disentan- the statisticalthere power will of be this is 360,000 in events measurement per of year correlated with nucleon pairs; Neutrino cross-section measurement prospects with SBND SBND an extremely powerful detector for measuringnuclei. interaction properties of the neutrino on argon simulations as detailed in [ PoS(NuFact2017)067 , and the 7 Nicola McConkey and the first APA frames 6 5 , is commissioned and ready to use for testing wired 7 . 7 0.5mm. After significant prototyping and development, APA two winding systems, ± Left: An APA frame is lowered into a cryogenic test vessel for commissioning. Centre: The Left: APA prototype manual winding machine with prototype frame. Centre: Semi-automated The components will be shipped to Fermilab, where detector assembly will take place in 2018. With regards to the photon detection system, the baseline system of PMTs is inThe cryo-testing production, vessel, shown in figure The SBND detector is currently in the advanced stages of component construction. The APA Figure 7: SBND pit, with cosmic ray tagger panels taking data. Right: Trial fitting of a CPA panel. The detector will beexpected commissioned soon and after. installed in the pit in 2019, with the first neutrino data APAs. The cosmic ray tagger has beencan constructed, be deployed seen and in operated figure in the SBND pit, which are being wired. The CPAmesh frames frames have are been under construction. welded and Field cage test components fitted, are as ready shown for in testing and figure assembly. Figure 6: APA winding machine. Right: APA frame preparation on the semi-automated winding machine table. the light guide bar system prototypingdevices are is in complete the and advanced ready stages to of manufacture, development. and the ARAPUCA frames have been manufactured, machined, assembledtolerance and of measured to be flatone to manual, the one specification semi-automated, are operational, as shown in figure Neutrino cross-section measurement prospects with SBND 4. Current status and future timeline PoS(NuFact2017)067 -Ar interactions. Nicola McConkey ν (2013) 161801 110 (2001) 112007 64 (2017) 135 1706 6 (2016) no.02, C02004. 11 (2017) no.1, 2 doi:10.3390/instruments1010002 [arXiv:1612.04614 1 [MiniBooNE Collaboration], Phys. Rev. Lett. (2012) P10019 doi:10.1088/1748-0221/7/10/P10019 [arXiv:1205.6747 7 [LSND Collaboration], Phys. Rev. D et al. et al. [MicroBooNE and LAr1-ND and ICARUS-WA104 Collaborations], , JINST [DUNE Collaboration], arXiv:1512.06148 [physics.ins-det]. , Instruments et al. et al. [DUNE Collaboration], arXiv:1706.07081 [physics.ins-det]. et al. et al. et al. [physics.ins-det]]. doi:10.1103/PhysRevLett.110.161801 [arXiv:1303.2588 [hep-ex]]. arXiv:1503.01520 [physics.ins-det]. doi:10.1007/JHEP06(2017)135 [arXiv:1703.00860 [hep-ph]]. [physics.ins-det]]. arXiv:1604.03103 [physics.ins-det]. doi:10.1088/1748-0221/11/02/C02004 doi:10.1103/PhysRevD.64.112007 [hep-ex/0104049]. SBND is the near detector for the SBN programme, measuring the unoscillated BNB in order SBND is currently under construction, and will begin taking neutrino data in 2019. [1] A. Aguilar-Arevalo [3] M. Antonello [4] S. Gariazzo, C. Giunti, M. Laveder and Y. F. Li, JHEP [5] B. Abi [6] R. Acciarri [7] A. A. Machado and E. Segreto, JINST [2] A. A. Aguilar-Arevalo [9] M. Auger [8] Z. Moss, J. Moon, L. Bugel, J. M. Conrad, K. Sachdev, M. Toups and T. Wongjirad, to make systematic and flux constraintsargon for interactions a with sterile unprecedented neutrino sensitivity search. due SBNDevent to will rates. excellent measure This detector neutrino- has characteristics and the high potential to transform our understanding of low energy References Neutrino cross-section measurement prospects with SBND 5. Summary and Conclusions [10] C. Anderson