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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.

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

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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