Laboratorio Subterráneo de Canfranc 
LSC

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Slides provided by Carlos Peña Director, LSC

(DAMIC-M kick-off meeting. Paris, 11-13 June 2018)

LSC Location

LSC

FRANCE

SPAIN

800 m under mount Tobazo (~ 2200 m.w.e) Muon flux ~ 3×10-3 m-2 s-1 Inlet air flux ~ 20000 m3/h Radon level 50 - 80 Bq/m3 Neutron (

Current Science Program at LSCPhysics ANAIS: dark matter using NaI(Tl) ArDM: dark matter with LAr T-REX: dark matter using high pressure gas TPC in argon or neon NEXT: double beta decay (DBD) using Xe CROSS: Molybdenum bolometers for DBD (demonstrator) BiPo: facility for DBD using Se for SuperNEMO SuperK-Gd: screening for Super-Kamiokande with Gd salt Muons: muons angular distribution at LSC

Gephysics Geodyn: study of seismic events at local and global scale ETSEC: in the framework of the Einstein Telescope project installation of seismic sensors at LSC (characterization of Newtonian background)

Biology GOLLUM: characterising subterranean bacterial along the train tunnel

CLYC-N: characterize CLYC scintillators for n and other applications

Hall A

LSC Underground Facility• LSC underground total volume ~10000 m3 for a total

surface of 1600 m2. • Underground space divided as:

– LAB780(L and R) since 1985: • two small halls 12 m2 each and two 70 m long small tunnels • early installation in service space for railway tunnel

– LAB2500: • 118 m2 hall in operation since 1994

– LAB2400: • Hall A has dimensions 40×15×12(h) m3 and Hall B has dimensions

15×10×8(h) m3 • 45 m2 clean room and 215 m2 service space • In operation since 2010

• Protocol to enter underground area: – Entrance through road tunnel – Independent exit through the railway tunnel

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LSC Service Facilities

• UNDERGROUND – Radio-purity screening: low counting underground laboratory

▪ 7 HPGe detectors + 1 SAGe – Clean room ISO7 (ISO6 in a sector) – Radon abatement system (220 m3/h) + radon detector (1mBq/m3) – Bi-Po

▪ High sensitivity large surface (~4m2) screening detector – Workshop – Geophysics infrastructure

• SURFACE – Chemistry laboratory

▪ Electro-forming of copper ▪ ICP-MS

– Electronics laboratory – Workshop – Secretariat, offices and meeting rooms – Exhibition room for outreach activities (Casa de los Abetos)

HpGe detectors at LSC

Sensitivity, assuming secular equilibrium and 10% efficiency: 238U ~ 10 – 100 ppt 232Th ~ 50 – 330 ppt 40K ~ 10 – 100 ppb

* Under commissioning

Low Background Counting at LSC

Detector V [cm3]

M [kg]

FWHM @ 1332keV [keV]

Integral (40,2700)keV [cts/keV/day]

208Tl 583.19keV [cts/kg/day]

214Bi 609.3keV [cts/kg/day]

60Co 1332.5keV [cts/kg/day]

40K 1460.8keV [cts/kg/day]

GeOroel 420 2.310 1.85 179.0 0.50 0.52 0.25 0.18

GeTobazo 410 2.255 2.07 552.4 1.65 1.76 0.75 0.27

GeAnayet 410 2.255 1.96 940.1 3.63 3.16 0.89 0.92

GeAspe 409 2.249 1.94 1518.2 1.98 1.86 0.49 0.44

GeLatuca 410 2.255 1.86 868.1 1.06 1.04 0.45 2.28

Asterix 387 2.129 2.08 196.2 0.85 0.93 0.36 0.16

Obelix 387 2.219 2.00 689.4 3.27 4.10 1.06 0.82

7 detectors underground (shielding: 10cm Cu + 20cm Pb) + 1 SAGe*

Shielding to be improved

Radon abatement plant

Since 2015

220 m3/h of mBq/m3 Rn-free air

It is be supported by a custom detector with mBq/m3 sensitivity

Radon-free air at present can be delivered to NEXT

Copper 
electro-forming Unique facility Synergy with LNGS and PNNL to characterise the set-up

ICP-MS measurements for bulk of Cu electro-formed at LSC

U [ppt]

Th [ppt]

OFHC* 0.2±0.01 1±0.06

Electro-formed*

< 0.05 0.040±0.002

* measurement at PNNL

BiPo-3 set-up @ LSCBiPo-3 detector becomes a generic low radioactive planar detector

• Goal: to measure the 208Tl (232Th chain) and 214Bi (238U chain) contaminations in thin foils with better sensitivity than a HPGe detectors

• Method: tagging of fast coincidence β-α correlated decays • 3.6 m2 equipped with 40 sectors each with 2 PMTs + light guides +

polystyrene scintillators surrounding the thin foil • sensitivity ~1.0 µBq/m2, on Selenium foils U < 30µBq/kg; Th < 2µBq/kg • Used for SuperNEMO foil screening (40mg/cm2 82Se), TREX, and

DarkSide-20k

BiPo-3 set-up in Hall A

Near Future Facilities at LSC

• Radon-free clean room (>2018) – turn Hall C into a clean room

• Water purification system (2018) • Storage for radioactivity sources for calibration

purposes (2018) • Copper electro-forming underground (2018) • Space for a CCDs setup testing area • New excavation (long term project)

Conclusions• LSC is a multidisciplinary research infrastructure

– astroparticle, nuclear astrophysics, geophysics, biology • LSC has a main program in DBD and direct DM search • Short term (2018) main scientific goals

– ANAIS reach one full year of data taking – ArDM conclude the two-phase run and start DART program – NEXT demonstrator data taking with enriched Xe – TREX installation and commissioning – CLYC-DM: complete screening of radio-purity and make a

neutron measurement underground – CROSS: start installation of cryostat – Geophysics one year of data with strainmeters

• Space available at LSC for new research activities