physics

  • Refilling the Liquid Helium of Bicep2

    Refilling the Liquid Helium of Bicep2

    A week or two ago, Physicist Jon Kaufman gave me a brief tour of the Bicep2 Microwave Telescope, operating here at the South Pole. Aa I reported earlier, the telescope operates at a very very low temperature – only a few millikelvin above absolute zero. In this particular telescope, to get down to that temperature,…