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  • richardmitnick 1:48 pm on May 2, 2013 Permalink | Reply
    Tags: , , , SNOLAB   

    From Fermilab: “New dark matter detector begins search for invisible particles” 


    Fermilab is an enduring source of strength for the US contribution to scientific research world wide.

    May 2, 2013
    Science contacts:
    Hugh Lippincott, Fermilab, 609-558-6313, hugh@fnal.gov .
    Juan Collar, University of Chicago, 773-702-4253, collar@uchicago.edu

    “Scientists this week heard their first pops in an experiment that searches for signs of dark matter in the form of tiny bubbles.

    bubbles
    This is an image of the first particle interactions seen in the COUPP-60 detector, located half a mile underground at SNOLAB in Ontario, Canada. Photo: SNOLAB

    Scientists will need further analysis to discern whether dark matter caused any of the COUPP-60 experiment’s first bubbles.

    ‘Our goal is to make the most sensitive detector to see signals of particles that we don’t understand,’ said Hugh Lippincott, a postdoc with the Department of Energy’s Fermi National Accelerator Laboratory who has spent much of the past several months leading the installation of the one-of-a-kind detector in a laboratory a mile and a half underground.

    COUPP-60 is a dark-matter experiment funded by DOE’s Office of Science. Fermilab managed the assembly and installation of the experiment’s detector.

    The COUPP-60 detector is a jar filled with purified water and CF3I—an ingredient found in fire extinguishers. The liquid in the detector is kept at a temperature and pressure slightly above the boiling point, but it requires an extra bit of energy to actually form a bubble. When a passing particle enters the detector and disturbs an atom in the clear liquid, it provides that energy.

    Dark-matter particles, which scientists think rarely interact with other matter, should form individual bubbles in the COUPP-60 tank.

    ‘The events are so rare, we’re looking for a couple of events per year,’ Lippincott said.”

    See the full article here.

    Fermilab Campus

    Fermi National Accelerator Laboratory (Fermilab), located just outside Batavia, Illinois, near Chicago, is a US Department of Energy national laboratory specializing in high-energy particle physics.


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  • richardmitnick 1:46 pm on December 12, 2012 Permalink | Reply
    Tags: , , , SNOLAB   

    From Fermilab: “Going deep for detector R&D” 


    Fermilab is an enduring source of strength for the US contribution to scientific research world wide.

    Wednesday, Dec. 12, 2012

    ed
    Erik Ramberg, assistant head for detector research, wrote this column

    “Sometimes you have to go to the ends of the Earth to get what you need. Last week for one Fermilab project this saying was more literal than figurative. The DAMIC (Dark Matter In CCDs) experiment saw a very successful culmination of several years of detector research.

    The latest episode for the DAMIC experiment played out in one of the more exotic laboratories in the world: the Sudbury Neutrino Observatory Lab [SNOLAB], located 6,800 feet underground in an active nickel mine in Ontario, Canada. This laboratory provides the right conditions for DAMIC and other dark-matter experiments. The extreme depth filters out cosmic rays, which could mimic dark matter interactions, and the highly specialized SNOLAB crew keeps the laboratory in clean-room conditions…”

    sl

    “…DAMIC uses charged coupled devices—the CCDs that have been used for many years in digital cameras. But these are not your average CCDs. They are the high-tech ones also used in the Dark Energy Camera [DECam], which Fermilab installed on the Blanco telescope in Chile. The detectors were developed and fabricated at Berkeley Lab and were tested and installed in the camera here at Fermilab…”

    decam
    view of the DECam, also showing the arrangement of the CCD array (CTIO)

    See the full article here.

    Fermi National Accelerator Laboratory (Fermilab), located just outside Batavia, Illinois, near Chicago, is a US Department of Energy national laboratory specializing in high-energy particle physics.


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  • richardmitnick 10:39 am on May 22, 2012 Permalink | Reply
    Tags: , , , SNOLAB   

    From Fermilab Today: “SNOLAB inauguration” 


    Fermilab is an enduring source of strength for the US contribution to scientific research world wide.

    Director’s Corner

    po
    Fermilab Director Pier Oddone

    Tuesday, May 22, 2012
    “Last week I attended the inauguration of SNOLAB. This underground facility in Ontario, Canada has been used now for more than two decades, starting with the enormously successful Sudbury Neutrino Observatory.

    We at Fermilab have several dark-matter experiments either running or planned to be located at SNOLAB. The COUPP 4-kilogram bubble chamber has been operating for more than a year. We will commission the next device, a 60-kilogram chamber, later this year. Assuming all goes well with the 60-kilogram chamber, we are planning for a 500-kilogram chamber. The Cryogenic Dark Matter Search (CDMS), currently running with 10 kilograms of germanium detectors in the Soudan mine in Minnesota, is seeking support from the DOE and NSF to install 100 kilograms of cryogenic germanium detectors at SNOLAB. CDMS will also compete with other dark-matter proposals in the Generation 2 (G2) funding competition next year. We will soon move the DAMIC prototype detector to SNOLAB. DAMIC uses very low-noise CCDs to detect dark-matter particles with a very low threshold, which makes it sensitive to much lighter dark-matter particles than other current experimental technologies.”

    See the Director’s full article here.

    Fermi National Accelerator Laboratory (Fermilab), located just outside Batavia, Illinois, near Chicago, is a US Department of Energy national laboratory specializing in high-energy particle physics.

     
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