LAr1 Plans at FNAL
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Transcript of LAr1 Plans at FNAL
LAr1 Plans at FNAL
Bruce Baller - Fermilab
LAGUNA Meeting - Mar 20112
Outline LBNE LAr detector overview Prototyping plan 1 kton prototype
LBNE, LArTPC, 300L – 800L Plan
Ross Shaft
Ramp From 300L to 800L
Existing 800 Level
Yates Shaft
LArTPC Cavern 1
Existing 300 Level
Kirk Portal
LArTPC Cavern 2
Utility Shafts To Surface
LAGUNA Meeting - Mar 20114
Existing 800 Level
Existing 300 LevelRoss Shaft
Access Ramp
Access Portal
Utility Shaft Access Portal, Cryogenics BuildingCaver
n
SITE PLAN
LAGUNA Meeting - Mar 20115
CR VetoCR Veto
CR Veto
Membrane Cryostat
Mounting Rails
AnodePlane
Assembly(168)
CathodePlane
Assembly(224)
Field Cage
2.5m7m
LAGUNA Meeting - Mar 20116
Cold Electronics
-4 -2 0 2 4 6 8
0.0
0.2
0.4
0.6
0.8
Am
plitu
de [V
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Time [µs]
T=300K T=77K
Gain 25 mV/fCPeaking time 1µs
0 10 20 30 40 50
Am
plitu
de [a
.u.]
Time [µs]
Peak time [µs] 0.5 1.0 2.0 3.0
collecting mode
non-collecting mode
gain [mV/fC]25147.84.7
Analog ASIC Tested
LAGUNA Meeting - Mar 20117
Reference Design - Key Parameters One detector module
2 high x 3 wide x 26 long = 168 Anode Plane Assemblies (APA) APA 3840 instrumented wires @ 3mm wire spacing (5mm?) Four wire planes: Grid, Induction 1, Induction 2, Collection
2.5m drift (3.5m?) 16.7 kton fiducial mass, 20 kton active mass, 25 kton
total mass Heat load = 31 kW insulation + 12 kW electronics + 6(x4)
kW LAr pump ~ 50 kW 0.5 MW power consumption (cooling!)
Light detection system? - A “desirement” Two detector modules in one cavern – 34 kton
Cavern 184m x 24m x 25m
LAGUNA Meeting - Mar 20118
Issues & Prototyping Plan Achieving argon purity without vacuum pumping
Liquid Argon Purity Demonstrator (LAPD) Achieving argon purity in a membrane cryostat
3m x 3m wall panel Leak testing
LAPD 35 ton prototype (purity monitors) Engineering and integration prototype
3 – 4 full scale APAs, 6 – 8 CPAs, field cage, full readout chain
“1 kton prototype” = SBL LAr1 (Project Manager opinion) Electronics reliability
20 year lifetime design rules for150 mm CMOS process, stress test
LAGUNA Meeting - Mar 20119
3m x 3m Membrane Cryostat Wall Panel
Compare He sniffing and ammonia calorimetric leak checking
Max dp across membrane if we need to vac pump
Under construction at Fermilab
GTT visit next week
Panel built at Samsung (Korea)
LAGUNA Meeting - Mar 201110
LAPD
10’ dia x 10’ high SS tank
2x20cm, 2x50cm purity monitors, RTD’s
Test in summer 2011
LAGUNA Meeting - Mar 201111
35 Ton Prototype 3m x 3m x 3m membrane cryostat Use LAPD cryogenics system and
instrumentation Side benefit: prototype cryostat procurement
Engineering – Arup Procurement & Construction – Fermilab or
construction management firm
LAGUNA Meeting - Mar 201112
“1 kton Prototype” Example
11.5m
11.5m
16m
1.2 kton LAr total 730 ton active 3.8m drift 6 kW cooling req’d
DZero Ass’y Hall pit Use DZero
calorimeter cryo system, ODH system
Attractive site
LAGUNA Meeting - Mar 201113
DAB Pit14m x 21m floor18m depth
LAGUNA Meeting - Mar 201114
Prototype or Physics Experiment?My Understanding “Physics experiment rules”
Fermilab: Experiment proposal approved by the director after consideration by the Physics Advisory Committee Time…
DOE: Detector constructed using capital equipment funds if the cost exceeds $5M project management structure (CD-0, etc) Time & money…
“Prototype rules” DOE: Constructed using R&D funds
Under the aegis of the parent project A Utopian vision
Fermilab constructs a LAr TPC test facility that just happens to be located in a neutrino beam
LAGUNA Meeting - Mar 201115 LAr WG Mtg - Dec 201015
TPB
TPB
Light detector – MPPC?Acrylic plate 460 nm g
128 nm g
Doc 3303, “Demonstration of a Lightguide Detector for Liquid Argon TPC’s”, arXiv 1101.3013
Key result: Observe 7 – 8 pe from 5.3 MeV a in LAr using a cryogenic PMT. (Expected 10 pe). 50 cm < attenuation length < 200 cm
Backup Slide – Light Collection
LAGUNA Meeting - Mar 201116
Backup Slide – Veto Drifts