20 Oct2017 HPGas TPC configuration Proposed iArDet Configuration 11T of 30 T produces 50100M n m CC evts in 3 yr n run From Chris Marshalls presentation at the DUNEND meeting of 913 ID: 784017
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Slide1
Alan Bross HPGas TPC working group20-Oct-2017
HPGas
TPC configuration
Slide2Proposed iArDet Configuration
11T of 30 T produces ~ 50-100M
n
m
CC evts in 3 yr n runFrom Chris Marshall’s presentation at the DUNE-ND meeting of 9/13:Hadrons, 90% contained all En bins:Within ~ 1.2m transverse~1.75m longitudinalHadrons, 99%2.05 m transverse3.45 m longitudinalLeptons, 90%2.7 m transverse (close with this config.)>5 longitudinal (need GTPC)ConclusionsNeed ~3.25m to contain 99% of events in 3-5 GeV EnTransverse dimension could be ~2.5mNeed side m taggerTPC can be extended in drift direction to helpCost increase solely due to increase in magnetic volume
~ 1T Fid Vol
HPGasTPC meeting
October 20 2017
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Slide3Isometric view
LAr cryostat:
7m wide x 5m deep x 4.5m tall
Gas TPC:
5m wide x 4.5m deep x 3.5m tall5m: Drift direction, 2.5m drift from center electrodeE parallel to BPressure vessel: 6m long, 6.5m diameterThis diameter gives 0.8m of space on the diameter between TPC and vessel wall. Allows for possibility of EM Cal inside With Cal outside the PV, then it would be smallerHPGasTPC meetingOctober 20 20173
Slide4Coil dimensions in this modelOctober 20 2017HPGasTPC meeting4
Slide5This produces a magnet bore which is ~ 7.5 X 7.5 X 6.5 m3, which is quite a bit larger than what is assumed in the DUNE CDR (4.5 X 4.5 X 8.0 m3)So, to work within that constraint, the TPC volume would be limited to ~ 4 X 4 m2 readout planes with a drift ≲ 2m. The TPC volume would be reduced from ~ 79 m3 to ~ 64 m3Need to take another look at the available ALICE chambers to see if the 4 X 4 m2 dimension could be pushed to 4 X 4.5 m2 by using their IROC chambers also.If not, we can live with a smaller magnet and save $$.The configuration, however, does NOT change.Magnet size
October 20 2017
HPGasTPC
meeting
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Slide6More engineering needs to be done on the pressure vessel and this could impact available volume for the tracker.I proposed a rather “radical” idea to Kathrine and Barry, but have not heard back.DANGER, DANGER , Will Robinson – Powerpoint engineering!Pressure vessel October 20 2017HPGasTPC meeting6
Slide7Observations on iron-dominated magnetsOctober 20 2017HPGasTPC meeting7
Slide8UA1 magnet - IronOctober 20 2017HPGasTPC meeting8
Slide9UA1 magnet - coilOctober 20 2017HPGasTPC meeting9
Slide10UA1 magnet - fieldOctober 20 2017HPGasTPC meeting10
Slide11UA1 magnet at T2KOctober 20 2017HPGasTPC meeting11
Slide12Down the road, we may want to consider the magnet configuration that NA49Target (ArgonCube)Tracker box (TPC)NA49 configurationOctober 20 2017HPGasTPC meeting12
Slide13NA49 design may be more appropriateOctober 20 2017HPGasTPC meeting13