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CROSS SIGNED

Cryogenic Rare-event Observatory with Surface Sensitivity

Total Cost €

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EC-Contrib. €

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Partnership

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 CROSS project word cloud

Explore the words cloud of the CROSS project. It provides you a very rough idea of what is the project "CROSS" about.

shape    laboratory    bolometers    unfortunately    expandable    isotopes    crystallization    enormous    transition    simplicity    advantage    sensitivity    double    lot    modularity    decay    experiments    aluminium    penetrating    zero    particle    energy    violation    li2moo4    neutrinoless    compounds    persist    extremely    searching    physics    alpha    beta    grounds    easily    delaying    arrays    enriched    surface    additional    canfranc       superior    idea    direct    pulse    100mo    resolution    installed    act    prospect    read    discriminate    reject    time    crystals    detectors    context    particles    light    exposure    candidates    depositions    decisive    bolometric    shallow    tonne    intrinsic    favor    intermediate    structure    underground    quasi    discrimination    arguments    respectively    teo2    ultrapure    events    coated    simplifying    performance    permil    international    phenomena    source    region    130te    experiment    rid    surfaces    ultimate    competitive    dominant    background    masses    cross    choices       solid    tagged    unprecedented    lepton    life    superconductive    neutrino    film    superconductors    modifier    purity   

Project "CROSS" data sheet

The following table provides information about the project.

Coordinator
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS 

Organization address
address: RUE MICHEL ANGE 3
city: PARIS
postcode: 75794
website: www.cnrs.fr

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country France [FR]
 Total cost 3˙146˙598 €
 EC max contribution 3˙146˙598 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2016-ADG
 Funding Scheme ERC-ADG
 Starting year 2018
 Duration (year-month-day) from 2018-01-01   to  2022-12-31

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS FR (PARIS) coordinator 3˙146˙598.00

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 Project objective

CROSS will set the grounds for large-scale experiments searching for neutrinoless double beta decay with zero background at an exposure scale of ~1 tonne x year and with very high energy resolution – about 1.5‰ – in the region of interest. These features will enable searching for lepton number violation with unprecedented sensitivity, penetrating in prospect the direct-ordering region of the neutrino masses. CROSS will be based on arrays of TeO2 and Li2MoO4 bolometers enriched in the isotopes of interest 130Te and 100Mo, respectively. There are strong arguments in favor of these choices, such as the high double beta transition energy of these candidates, the easy crystallization processes of TeO2 and Li2MoO4, and the superior bolometric performance of these compounds in terms of energy resolution and intrinsic purity. The key idea in CROSS is to reject surface events (a dominant background source) by pulse-shape discrimination, obtained by exploiting solid-state-physics phenomena in superconductors. The surfaces of the crystals will be coated by an ultrapure superconductive aluminium film, which will act as a pulse-shape modifier by delaying the pulse development in case of shallow energy depositions, exploiting the long quasi-particle life-time in aluminium. This method will allow getting rid of the light detectors used up to now to discriminate surface alpha particles, simplifying a lot the bolometric structure and achieving the additional advantage to reject also beta surface events, which unfortunately persist as an ultimate background source if only alpha particles are tagged. The intrinsic modularity and the simplicity of the read-out will make CROSS easily expandable. The CROSS program is focused on an intermediate experiment with 90 crystals, installed underground in the Canfranc laboratory, which will be not only extremely competitive in the international context but also a decisive step to demonstrate the enormous potential of CROSS in terms of background.

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