LAr20 Goals & Plans Integrated R&D Plan Development Bruce Baller November 23, 2009

Outline LAr20 – TPC basics – Participants – LAr20 reference design parameters – Detector concepts & short term plans R&D Plan Development – The historical plan – Risk analysis – Additions to the historical plan 2 Director's Review of LAr Integrated Plan, Nov 23, 2009

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Active LAr20 Institutions BNL – Cryogenics, TPC, cold electronics Indiana – Cryostat, cryogenics FNAL – Cryostat, cryogenics, cavern & infrastructure, installation planning, warm electronics, physics R&D Michigan State – Cold electronics Minnesota – Installation planning Tufts – Physics R&D UCLA – TPC, HV feedthrough Yale – TPC, Physics R&D 4 Director's Review of LAr Integrated Plan, Nov 23, 2009 ~30 active participants

LAr20 Conceptual Design Options – Membrane cryostat is attractive if evacuation is not required Effective use of the excavated cavern volume Design used in LNG tankers of volume ~10x LAr20 Over 200 tankers in service since 1970 ~CD2 level costing information received from mfg 5 Director's Review of LAr Integrated Plan, Nov 23, 2009

6 1m of foam glass instead of foam panels

Alternatives for CD1 Modular Soup Can  Cryostat configuration  Modular cryostat is our backup if evacuation IS required  Less effective use of excavated volume than membrane  Soup Can configuration – Not considered for CD1  Standard tank construction for above-ground application  Non-standard cavern excavation 7 Director's Review of LAr Integrated Plan, Nov 23, 2009

Cryostat Options Costing Director's Review of LAr Integrated Plan, Nov 23,  Excavation & outfitting cost ~$800/m 3  LAr cost ~$1k/kton  Membrane cryostat cost ~$2k/m 2  TPC, electronics, etc cost not included

Membrane Cryostat Cross Section 9 Director's Review of LAr Integrated Plan, Nov 23, 2009

Cryostat “Kit” Components Director's Review of LAr Integrated Plan, Nov 23,

Labor Estimates Director's Review of LAr Integrated Plan, Nov 23,

Tools for Installation Director's Review of LAr Integrated Plan, Nov 23, Automatic welding machine Resin mixing machine Gluing machines

Proposal Cost Estimate Director's Review of LAr Integrated Plan, Nov 23, Proposal cost estimate is proprietary Cost ~$2k/m 2 w 30% UG labor premium, FNAL technicians

GEOSTOCK Pilot Plant South Korea 14 Director's Review of LAr Integrated Plan, Nov 23, 2009 “Underground Storage of LNG in Mined Rock Cavern”, Nicolas Gatelier, IGRC, Paris 2008 Membrane cryostat Constructed & operated in 2003 – 2005 Proposing a 200 kton LNG storage plant

LAr20 Reference Design #1 Fiducial mass = 1/6 of 100kt Water Cherenkov  16.7kt (LAr20) – Size ~20m x ~20m x ~40m Drift distance 2.5m 2 or 3 wire planes, wire spacing = mm – Cost-benefit decision ( e ID efficiency, NC  o rejection) – ~500k channels for 2 wire planes with 5mm spacing Director's Review of LAr Integrated Plan, Nov 23,

Reference Design #1 TPC Concept Director's Review of LAr Integrated Plan, Nov 23, m Cathode Plane Wire Planes Start with the design and cost estimate of the MicroBooNE TPC module (~10m long). Increase the width of the wire planes to 4m Add mirror module 4m 11m Pre-assembled wire planes 4m x 10m x ?cm Shipping box fits in Yates supercage

Depth Options for CD1 300 level – oscillation physics, pdk?, SN ’s? – Drive in access 4850 level - oscillation physics, pdk, SN ’s – Shaft access Director's Review of LAr Integrated Plan, Nov 23,

Cavern Cost Study The LAr20 cavern concept has a 20m deep pit – Not the “standard” DUSEL lab module DUSEL has dropped development of the 300 level We are conducting a cost study to address these uncertainties – Managed by Chris Laughton (FNAL mining engineer & LAr20 system manager) – Request for Proposal issued in October to mine engineering consultants – Currently reviewing 4 proposals Director's Review of LAr Integrated Plan, Nov 23,

Cryo Engineering Consultants Contract with Arup for – Conceptual design of membrane cryostat – Conceptual design of modular cryostat – Conceptual design of cryogenics plant Arup capabilities (w Linde sub-contract) – Conceptual design of >20 LNG cryogenic & cavern storage facilities – He and H2 liquefier systems – Under contract with DUSEL 19 Director's Review of LAr Integrated Plan, Nov 23, 2009

Cryo Plant Concepts LN2 cooling system – Surface or UG – Re-liquefy N2 – LN2 tracer in cryostat(?) Heat load – 20kw cryostat + 20kw electronics – ~400kw power consumption Director's Review of LAr Integrated Plan, Nov 23, Note: This layout inaccurate to meet purity requirements

Cold (87K) Electronics Concept Director's Review of LAr Integrated Plan, Nov 23,  Cosmic Ray Test Stand CMOS tests  Edwards (Michigan State)  CMOS ASIC Development & testing  Radeka, Rescia (BNL)  Yarema (FNAL)  Cressler (Georgia Tech)  Integration, grounding  Marvin Johnson (FNAL)

LAr20 Readout Scheme Director's Review of LAr Integrated Plan, Nov 23, Event Filter Raw Data Rate: ~200 GB/s (384 Mbps X 5.5k) Event Filter will receive optical signals, de-multiplex, decompress and find useful events, then send to Event Builder/DAQ Farm Data Rate to Event Builder: ~200 MB/s (200GB/s X 10 X ) H. Chen - BNL

LAr20 Short Term Plan The first cost estimate for the LAr20 Reference Design #1 should be available in Feb – Arup conceptual designs of the cryostat options & cryogenics plant complete – LAr20 team goal: Complete the cost estimate for the Reference Design #1 – Cavern cost study completed(?) – FNAL does first pass estimate of ODH mitigation Calculation of the fiducial volume for Reference Design #1 can feasibly be available in Feb We will have a CD-1 level estimate of cost per kton of fiducial volume Director's Review of LAr Integrated Plan, Nov 23,

R&D Plan Development “Historical” (ca 2005) plan – Test stands & experiments (next 2 slides) Development of the proposed plan – Methodology Risk identification  risks that are not being addressed by the historical plan Risk classification  level of importance Risk mitigation  Propose new R&D activities /experiments – Analysis done by the Integrated Plan development group over an intense 3 month period – This Director’s Review is the first external airing of the plan Director's Review of LAr Integrated Plan, Nov 23,

Director's Review of LAr Integrated Plan, Nov 23, The Historical Plan

Director's Review of LAr Integrated Plan, Nov 23, The Historical Plan

Integrated Plan Development Group Flavio Cavanna (L’Aquila) Ornella Palamara (Gran Sasso) Bruce Baller (FNAL) Bonnie Fleming (Yale) Cat James (FNAL) Rob Plunkett (FNAL) Stephen Pordes (FNAL) Gina Rameika (FNAL) Brian Rebel (FNAL) Jon Urheim (Indiana) Director's Review of LAr Integrated Plan, Nov 23, Un ringraziamento speciale

Risk Identification Assume that all R&D activities in the Historical Plan are successful – ArgoNeuT is taking data, ~10k neutrino interactions, will publish QE cross sections – Analysis code developed for 3D reconstruction of tracks and showers – LAPD demonstrates long electron lifetime without first evacuating the cryostat – MicroBooNE publishes results from 100k sample of neutrino interactions, demonstrates long electron lifetime without first evacuating the cryostat What risks remain that might prevent successful operation of LAr20? Director's Review of LAr Integrated Plan, Nov 23,

Risk Classification Director's Review of LAr Integrated Plan, Nov 23,

Director's Review of LAr Integrated Plan, Nov 23, Mitigation Notes

Director's Review of LAr Integrated Plan, Nov 23, Mitigation Notes

Director's Review of LAr Integrated Plan, Nov 23, Calibration test Cryostat prototype Installation/Integration prototype Electronics stress test HV feedthrough prototype Review of FNAL cryo safety std Proposed new R&D Activities

Final Comments The proposed set – Reduces risks to an acceptable level – Is cost effective – Takes into consideration our understanding of schedule and resource constraints Subsequent talks will detail the risks in each category and the mitigation plan Director's Review of LAr Integrated Plan, Nov 23,