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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.

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

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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