PTOLEMY(PonTecorvo Observatory for Light Early-Universe Massive-Neutrino Yield)

atLNGSKick-offmeeting,December11-12,LNGS,L'AquilaItaly

A.G.Cocco,M.MessinaandC.G.Tully

UndergroundphysicsatLNGSüNeutrinos(BOREXINO,LVD,GERDA,CUORE,COBRA)üDarkMatter(DAMA/LIBRA,DARKSIDE-50,XENON,CRESST)üNuclearAstrophysics(LUNA)ü FundamentalPhysics(VIP)üMultidisciplinaryACTIVITY(GINGER,CosmicSilence,ERMES-W)

The three experimental halls (A, B, C) are ~100 long 20 m wide and 18m height.

Aimofthemeeting

The main goal of the meeting is to gather physicistsinterested in the PTOLEMY project and give a clearpicture the state of art of the technology.

Bytheendofthemeetingwillhopefullystartacollaborationthatisinterestedinstayingengagedinacommoneffort,forexampleon:• ParticipatetotheprototypeactivitiesatLNGS• ShareR&Dprogressatcollaborationmeetings• DesignthefinaldetectorforRelicNeutrinosearch• Pursuegrantapplicationstoself-fundtheirgroups• Contributetocollaborationproposalsfornext

generationprototypesandafull-scaleexperiment(Moredetailswillbediscussedtomorrow)

PTOLEMYprototypeatLNGSTheproofofprinciplerequirestoshowthecapabilityoftransportingsingleelectronfromthesourcetothe

measuringpointwithminimalimpactonthetotalenergy.

Backgroundfreeenvironmentisrequiredfor:Ø ElectrodesbiasvoltagestabilityØ ReducingbackgroundelectronsfromtheGrapheneØ ReducingnoiseonRFpick-upsignalØ ReducingcountsintheTESmicro-calorimeterØ ReducingbackgroundparticlesintheMAC-Efilter.

RunningtheprototypeatLNGSwillallowtoevaluatetheeffectoftheoverburdenonthePTOLEMYdetectorperformance.

LNGSisaspecialplace• Mechanical,electronicandchemistryworkshopshavetheknowhow

thatiskeytotheaccomplishmentoftheproofofprincipleof

PTOLEMY.

• LocalcommunityofResearchershaveexpertise

• inlowtemperatureapparatus,

• ultracleanmaterialsselectionandoperationinclean

environment,

• insettingupandruntemperaturesensorswhichwillhavea

specialroleinthefinaldetectordesign.

• Commonlocationwherethecollaborationcanmeetandwork

together.

PotentialSitesfortheRelicNeutrinoExperimentwithfullTload

OthersitesarealsounderconsiderationinEurope(Canfranc inSpainandinSweden)andalsoinItaly.

InBolognaregionanoldtunnel,usedbycivilaeronauticsinthelate40,hasbeenrefurbishedbyUniversityofBolognatohostawindtunnel.Asecondtunnelisavailabletobeusedforothertypeofresearch.Thisisashallowdepthsite.

Garpenberg MineDistance from ESS Lund 540 km

Depth 1232 m Truck access tunnelsPreviously two ore-hoist shafts

Recently a new ore-hoist shaft was taken into operation,leaving the Garpenberg Norrashaft free for other uses Granitedrillcores

7SeminarinGrenobleTordEkelöfUppsalaUniversity2015-12-15