DUNE ND The Way Forward Mike Kordosky (W&M) Kam-Biu Luk (UC Berkeley & LBL) Steve Manly (Rochester) (Oxford & STFC/RAL) Alfons Weber 21-Sep-2017
Agenda • Where we are • Where to go and how to get there • Suggested way forward • Timeline 2 21-Sep-2017 ND WG Meeting
Where we are • General agreement - LAr with Pixel readout • Maybe with side muon detectors • Followed by downstream low-density tracker - Low density tracker • In magnetic field (dipole or solenoid) • HPTPC or STT • Possible extensions - Add scintillator active target - Make the detector(s) movable 3 21-Sep-2017 ND WG Meeting
ArgonCube 4 21-Sep-2017 ND WG Meeting
HP GAr TPC Magnet (0.5T) LAr TPC hpg EM Cal (20X o ) Steel (4 l o ) LAr: with 2 X 2 m FV ~ 7 X o annulus ~ 1.25 l o annulus Magnet is this model is 6.5m diameter and 7 m long Maximize acceptance for m from LAr Coil could become pressure vessel 5 21-Sep-2017 ND WG Meeting
Straw Tube Tracker • Function - Use as spectrometer for LAr - LAr provides in-situ check of STT prediction - Two independent neutrino electron measurements • Statements - 3.5 x 3.5 m 2 is absolute minimal transverse dimension - 4.5 m is minimum length 6 21-Sep-2017 ND WG Meeting
Magnets 7 21-Sep-2017 ND WG Meeting
The Magnet Question • Dipole or Solenoid - Both are possible • Advantages & disadvantages - Both: cost - Dipole better fit to square detector - Solenoid better fit to cylindrical detector • Offer: - “free” KLOE magnet may save a lot of money • Is it suitable? • Can we do the physics? 8 21-Sep-2017 ND WG Meeting
KLOE Solenoid • Study by Tom Hamernik: dune-doc-5060 • Additional costs (TPC in M$) - Increase shaft diameter 4.0 - Helium Liquefier system 5.6 - Increased size of service building 2.6 - Total 12.2 9 21-Sep-2017 ND WG Meeting
The Way forward 10 21-Sep-2017 ND WG Meeting
The Way Forward Concentrate on a limited number of options • Evaluate physics • Express interest to built Option 1 Option 2 • Dipole magnet • Dipole magnet • STT • HP GAr TPC • 1m 3D scintillator • 1m 3D scintillator Friendly amendment • Move detector ala DUNEPRISM (2 or 3 positions) 11 21-Sep-2017 ND WG Meeting
Hybrid magnetized Muon system (Nuclear targets) ECAL STT or TPC 3D Scint 12 21-Sep-2017 ND WG Meeting
Evaluate the Physics • Need to implement geometries in general package (BNL/SB) • General physics/performance questions - have been discussed in the past - Details will be presented next week (MK talk at last CM) • Also questions for pixel LAr 13 21-Sep-2017 ND WG Meeting
Timeline • Sep 2017 define a limited set of detector options to be taken forward - task the proponents to answer a specific set of questions - • Nov 2017, CERN ND workshop Initial review of progress across the detector options, identify addition needs for - studies • Jan 2018, Collaboration meeting midterm review of progress - • Mar 2018, ND workshop review all findings, decide on tracking technology - identify collaborators to take detector choice forward - identify R&D needs - • May 2018, Collaboration meeting Propose ND concept and team to collaboration - 14 21-Sep-2017 ND WG Meeting
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