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Post at: Sep 09 2022

World’s Most Sensitive Dark Matter Detector

  • In July,It is reported that,Berkeley Lab researchers record successful startup of LUX-ZEPLIN dark matter detector at Sanford Underground Research Facility,USA.

LUX-ZEPLIN (LZ) Dark Matter Detector

  • LZ is already the world’s most sensitive dark matter detector.
  • It is designed to capture dark matter in the form of weakly interacting massive particles (WIMPs).
  • It is tucked down about a mile at Sanford Underground Research Facility (SURF).
  • The experiment is underground to protect it from cosmic radiation at the surface that could drown out dark matter signals.

Composition of Detector:

  • It comprised of two nested titanium tanks filled with ten tonnes of very pure liquid Xenon and viewed by two arrays of Photomultiplier Tubes (PMTs) able to detect faint sources of light.
  • The Titanium tanks reside in a larger detector system to catch particles that might mimic a dark matter signal.

What is Dark Matter?

  • Dark matter is an invisible form of matter that accounts for most of the universe’s mass.
  • Astronomers inferred its location by analyzing the effect of gravitational lensing.
  • Very Firstly, NASA Hubble Space Telescope image shows the distribution of dark matter in the center of Abell 1689,but Hubble cannot see the dark matter directly. 
  • (Abell 1689 is a giant galaxy cluster that contains about 1,000 galaxies and trillions of stars.)
  • Dark matter may not be made up of the matter we are familiar with at all. 
  • The matter that makes up dark matter could different or It may be filled with particles predicted by theories,yet there are more to come.

Why it is unseen?

  • Because it does not emit, absorb, or scatter light.
  • Dark matter's presence and gravitational pull are nonetheless fundamental to our understanding of the universe.

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