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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.

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

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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