The Canadian Hydrogen Intensity Mapping Experiment

A partnership between the University of British Columbia, McGill University, the University of Toronto and the Dominion Radio Astrophysical Observatory

CHIME is a novel radio telescope consisting of cylindrical reflectors roughly the size and shape of snowboarding half-pipes with an array of radio recievers along the focus. There are no moving parts; CHIME will measure over half the sky each day as the Earth turns.

CHIME will map the distribution of neutral Hydrogen over the redshift range from 0.8 to 2.5. These data will be used to produce a map of cosmic structure over the largest volume of the universe ever observed, with enough spatial resolution to discern the "baryon acoustic oscillations" that were imprinted on cosmic structure at early times. This three-dimensional map will enable cosmologists to better discern the cause of the Universe's accelerating expansion.

CHIME Overview: A description of the goals and design of CHIME (pdf).

Talks on CHIME:
  • Read Shaw et al. (2013) for an approach to analysis of data from transit radio telescopes.
  • Read A two element interferometer prototype for the Canadian Hydrogen Intensity Mapping Experiment, Greg Davis's MSc thesis, for a description of CHIME RF electronics.

    CHIME in the news:

    Talks from the 2011 workshop at the DRAO: Novel Telescopes for 21 cm Cosmology