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

]

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