Alan BrossMPD WG MTG March 9, 2020

DUNE Near Detector meeting– TIFR

Workshop Focus

• This workshop addressed the technical needsof the DUNE near detector complex. Ofparticular interest was the discussion of thecollaborative effort that will be required inorder to deliver the components of the multi-purpose detector (MPD) system: the HPgTPCand its pressure vessel, the magnet systemand the muon tagger/ID system.

• https://indico.ino.tifr.res.in/indico/event/577/3/9/20 TIFR WS2

AGENDA

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AGENDA (Thurs. afternoon)

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AGENDA

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AGENDA

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Pressure VesselBARC design

• Design well advanced

• Material (Al) source identified

• BARC confident that they can fabricate in India

Developing Designs: Solenoid w/ Partial return Yoke (SPY)

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Modified SPY Design

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SPY detail

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Don Mitchell

Modified PV Design II

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Replace hemispherical heads with flat plates

Developing Designs: Solenoid w/ Partial return Yoke (SPY)

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Proposed TPC vessel design

• Support legs need to be redesigned

• Available space between coils is very small

• Vessel to support E-Cal?

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Developing Designs: Solenoid w/ Partial return Yoke (SPY)

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Detail View

TPC

E-CAL

300 mm

193 tons!

1900 mm 1900 mm2100 mm

Overall designIntegrationChallenging

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Developing Designs: Solenoid w/ Partial return Yoke (SPY)

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MPD: Indian participation/contributions

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Moving Forward

MPD: Indian participation• BARC is already vigorously involved- Taking on the responsibility for the HPgTPC PV- Member of magnet system team- Can (offered) engineering design help on ECAL

• Many opportunities (both hardware and software) for university groups

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MPD: Indian University participation • Hardware- µ-tagging system- ECAL module production- Magnet instrumentation

• In software and physics analysis there are many opportunities to make critical and important contributions- HPgTPC, ECAL, Magnet system (µ-tagger)- Plus many areas to contribute to the LBL general analysis group

• Support available for visitors to Fermilab- Intensity Frontier Fellowships- Student internships

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Fermilab Intensity Frontier Fellowships• Support for experimental or theoretical researchers wishing to pursue novel

concepts with Fermilab scientific staff to enhance or strengthen the current program at Fermilab.

• Eligibility- Ph.D. in Experimental or Theoretical Particle or Nuclear Physics.- Successful candidates will be resident at Fermilab for 50 percent or more of

the duration of the fellowship. • Financial support: up to 50 percent of researcher’s total current

compensation, reimbursed to the researcher’s home institution. Awards may include a travel budget to enable regular trips to remote experimental locations when appropriate, and to conferences to present work.

• See: https://www.fnal.gov/pub/forphysicists/fellowships/intensity_frontier/• Groups should please contact the NDDG conveners with their areas of

interest for participation on the MPD

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LBNC Meeting

Agenda for ND

• Plus this was the first time we had a ND break session (2 hrs).

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Recommendation II from December• The optimization for both the MPD’s ECAL and its

magnet design should be driven primarily by physicsrequirements. Hence, LBNC would like to see theseclarified and incorporated in the process of thedesign optimizations. LBNC would also like to hearof possible design challenges related to themovability of the detector

• For magnet – physics requirement is that muonmomentum resolution should be at least as good asthat in FD- For events originating in gas- Combined Liquid + MPD

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From Plenary:Muon spectrometer requirements

Required (min) resolution for the MPD:Core (s): 3-4% Full RMS: <10%

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• Overarching requirement: Measure neutrino energy• Measure Pµ at least as well as by range in LAr at FD

Pµ = 1.0-1.5 GeV/c Pµ = 2.0-2.5 GeV/c

Muons from nµCC events in gas (LBNF beam)

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• Correct hits assigned to track- Pattern reco in

development• No noise• Full pad response

- Drift/Diffusion simulated

• Point resolution needs optimization

• Kalman fit- Needs optimization

• Track stitching across cathode

Tom Junk

Muons “from” LAr (particle gun)

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This is full reco. Improvement ispossible as can be evidenced by the fit. Track splitting is an Issue.Again, more work to be done

• In this and the following examples, the ECAL and the pressure vessel have been removed. The simulation properly handles in the simulation, but currently energy-loss corrections due to loss in them has not yet been implemented.

Muons “from” LAr (particle gun)

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With forced correct track-hitassignment

Muons “from” LAr (particle gun)

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Full reco

Muons “from” LAr (particle gun)

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With correct track-hitassignment

Gluckstern

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• So, given where we are with muon momentum resolution (2 ½ -4%), the 0.5T field and the 5m size of the HPgTPC are appropriate choices that allow the detector to meet the Pµ

res requirement- Little margin to degrade and still meet s(Pµ) requirement in gas events

• More margin likely in MPD’s function as muon spectrometer for LAr- However, expect improvements as code matures

From the point-of-view of the magnet, once the central field is defined, [0.5T], the rest is value engineering (well, mostly)

Solenoid w/ Partial return Yoke (SPY)

• Central Field = 0.5T• 4 identical coils, single

layer• ~1500 x 20 mm2 each• ~3660 mm radius• 45 MJ of stored energy- C($) ~ (E)0.8

• Overall width ~ 8m

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Andrea Bersani

Movement System

Matthaeus LeitnerBob Flight

DUNE ND Prism Design Utilizes Commercially Proven Roller Drives Which Distribute Significant Detector Weights

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•Control system can synchronize several rows of rollers to distribute weight•Rock and concrete floor can support weight• System Permits Smooth Movement

CLOSE OUT

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