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Towards the ultimate dark matter detector

Total Cost €


EC-Contrib. €






 ULTIMATE project word cloud

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

orthogonal    few    solved    interacting    detection    strategies    treatments    gev    mockup    limited    xenon    masses    emanation    goals    seriously    wimps    neutrino    universe    combination    hermetic    subsequent    222rn    prototype    outnumbering    sensitive    accessible    statistics    science    world    liquid    systematic    tpc    radioactive    ultimate    assembly    space    tackle    projection    search    operated    first    40t    physics    optimize    lxe    budget    minimized    radio    optimal    sensitivity    building       detected    size    chamber    ordinary    sup2    entire    ptfe    baryonic    constructed    detector    characterization    structural    explored    experimental    surface    massive    reduce    form    galactic    construction    limit    irreducible    edge    single    instrument    fundamental    cutting    time    entirely    backgrounds    background    particles    generation    particle    rejection    dark    material    identification    experimentally    wimp    5m    full    filled    channels    pure    minimal    experiments    neutrons    probe   

Project "ULTIMATE" data sheet

The following table provides information about the project.


Organization address
postcode: 79098

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 Germany [DE]
 Total cost 1˙982˙938 €
 EC max contribution 1˙982˙938 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2016-COG
 Funding Scheme ERC-COG
 Starting year 2017
 Duration (year-month-day) from 2017-05-01   to  2022-04-30


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 


 Project objective

Dark matter is a major component of the Universe, outnumbering ordinary baryonic matter by a factor 5. As it has not yet been observed, its detection and subsequent characterization is one of the most important goals in particle physics. ULTIMATE will be the first project world-wide that focuses entirely on cutting-edge research towards the ultimate detector. Using a low-background time projection chamber (TPC) filled with ~40t of liquid xenon (LXe), this instrument will search for Galactic dark matter in the form of Weakly Interacting Massive Particles (WIMPs). It will probe the entire experimentally accessible parameter space above masses of a few GeV/c², which is eventually limited by irreducible neutrino backgrounds. If dark matter will be detected by the next-generation experiments, the ultimate detector will deliver a high statistics WIMP sample to study its properties.

To eventually propose and build this detector, which will be also sensitive to many non-WIMP science channels, various fundamental experimental challenges need to be solved now. These include a significant reduction of radioactive backgrounds, which would seriously limit the instrument's sensitivity, and structural aspects related to the TPC size of ~2.5m. ULTIMATE will tackle both, following several orthogonal strategies: Two novel TPC concepts will be developed and operated in LXe for the first time, to reduce background from 222Rn (hermetic TPC) and to optimize background rejection (single-phase TPC). Background neutrons and 222Rn emanation from the important material PTFE will be minimized by the identification of radio-pure PTFE, a systematic study of surface treatments, and by building a full-scale TPC mockup. Such prototype has not been constructed before and will enable detailed design, construction and assembly studies of a TPC with minimal material budget. The combination of all strategies explored in ULTIMATE will represent an optimal concept for the ultimate WIMP detector's TPC.


year authors and title journal last update
List of publications.
2019 Marc Schumann
Direct detection of WIMP dark matter: concepts and status
published pages: 103003, ISSN: 0954-3899, DOI: 10.1088/1361-6471/ab2ea5
Journal of Physics G: Nuclear and Particle Physics 46/10 2020-01-28

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The information about "ULTIMATE" are provided by the European Opendata Portal: CORDIS opendata.

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