LAr20 Goals & Plans Integrated R&D Plan Development

LAr20 Goals & PlansIntegrated R&D Plan Development

Bruce BallerNovember 23, 2009

Director's Review of LAr Integrated Plan, Nov 23, 2009

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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


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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 ~30 active participants


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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


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1m of foam glass instead of foam panels


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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


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Cryostat Options Costing

$48

$50

$52

$54

$56

$58

$60

$62

$64

Series1

20kt Scaled Cost

$M

Excavation & outfitting cost ~$800/m3

LAr cost ~$1k/kton Membrane cryostat cost ~$2k/m2

TPC, electronics, etc cost not included


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Membrane CryostatCross Section


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Cryostat “Kit” Components


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Labor Estimates


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Tools for InstallationAutomatic welding machineResin mixing machineGluing machines


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Proposal Cost Estimate

Proposal cost estimate is proprietary

Cost ~$2k/m2 w 30% UG labor premium, FNAL technicians


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GEOSTOCK Pilot PlantSouth Korea

“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


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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 = 3 - 5 mm

– Cost-benefit decision (ne ID efficiency, NCpo rejection)

– ~500k channels for 2 wire planes with 5mm spacing


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Reference Design #1TPC Concept

2.5m

2.5m

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 4mAdd mirror module

4m

4m

11m

Pre-assembled wire planes4m x 10m x ?cm

Shipping box fits in Yates supercage


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Depth Options for CD1

• 300 level – n oscillation physics, pdk? , SN n’s?– Drive in access

• 4850 level - n oscillation physics, pdk, SN n’s– Shaft access


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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


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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


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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

Note: This layout inaccurate to meet purity requirements


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Cold (87K) Electronics Concept 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)


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LAr20 Readout Scheme

Event FilterRaw 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 FarmData Rate to Event Builder: ~200 MB/s (200GB/s X 10 X 0.0001)

H. Chen - BNL


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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


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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


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The Historical Plan


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The Historical Plan


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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)

Un ringraziamento speciale


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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?


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Risk Classification

0 1 2 3

3 Low Med High High

2 Low Low Med High

1 Low Low Low Med

Consequence Ranking

Likelihood Ranking

Consequence Ranking ThresholdVery High 3 Significant delay (>1 yr), cost impact > $10MModerate 2 Moderate delay (>3 mon), cost impact > $1MLow 1 Minor delay (<3 mon), cost impact < $1M

Likelihood Ranking ThresholdVery Likely 3 >90% probabilityLikely 2 50% - 90% probableUnlikely 1 1% - 50% probableVery Unlikely 0 <1% probable


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Category Post MicroBooNE Potential ProblemConse

quenceLikelihood Risk Mitigation

Mitigated Likelihood

Mitigated Risk

Argon PurityAchievement of adequate lifetime requires evacuation. (MicroBooNE and/or LAPD were not successful)

3 1 MedKeep modular cryostat as an option 0 Low

Argon Purity Cannot achieve required drift length 3 1 Med Develop QA procedures 0 Low

Argon Purity

Argon purity immediately following filling is poor requiring several volume recirulations before operations can begin

1 3 Med 3 Med

Argon Purity

Increasing the drift distance is a low impact method of reducing the cost of LAr20, however drift distances >2.5m may not have been demonstrated

2 1 Low 1 Low

Cryogenics The cryostat develops a leak during operation. 3 0 Low 0 Low

CryogenicsExtrapolation from LNG experience/design to LAr is invalid or not understood adequately

3 1 MedEngineering analysis will mitigate this

0 Low

Electronics"Hot electrons" at 87K damage the cryogenic ASIC's over the lifetime of the detector with a loss of >50% of the detector channels

3 1 MedPerform stress test on ~5% of LAr20 channel count 0 Low

ManagementSuppliers are unable to deliver the needed quantities of cryogens on the schedule needed for filling

2 1 Low 1 Low

ManagementCritical components have a single supplier - procurement & operations

2 0 LowThere is already an R&D plan in place

1 Low

ManagementThere are insuffi cient technical resources to conduct the planned and proposed R&D

2 3 HighIncrease FNAL resources

2 Med

ManagementThere are insuffi cient scientific resources to conduct the planned and proposed R&D

2 3 HighSolicit additional collaborators

2 Med

Mitigation Notes


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Category Post MicroBooNE Potential ProblemConse

quenceLikelihood Risk Mitigation

Mitigated Likelihood

Mitigated Risk

Physics R&DThere is no intermediate scale detector between MicroBooNE and LAr20

1 1 Low 1 Low

Physics R&DNo calibration exists to allow a determination of EM and hadronic shower energy

1 3 MedDo a test beam calibration. Use ArgoNeut?

0 Low

TechnicalIf drift distances >2.5m are required, the required HV cannot be achieved

3 1 MedOperate a HV feedthrough prototype

0 Low

TechnicalMovement of long unconstrained wires creates noise in the detector

2 0 LowSP: would like a small test on long wires, in LN2 or dirty LAr

0 Low

Underground issues

The detector costs is significantly higher than expected

3 2 HighTrack costing during prototyping

1 Med

Underground issues

The cost of deployment at the deep underground site is significantly higher than expected

2 2 Med

Dry mockup to simulate installation. ~10% size of LAr20. Using Arup for UG design & estimating

1 Low

Underground issues

The ODH risk is not estimated correctly or the ODH mitigation plan is not properly constructed 3 1 Med

Perform an independent review of FNAL ODH methodology & plan

0 Low

Mitigation Notes


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Calibration testCryostat prototypeInstallation/Integration prototypeElectronics stress testHV feedthrough prototypeReview of FNAL cryo safety std

Proposed new R&D Activities


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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

Documents

LAr20 Goals & Plans Integrated R&D Plan Development