The COUPP collaboration lowered its bubble chamber into a tunnel on the Fermilab site on March 28, 2005. Moving the bubble chamber 350 feet underground significantly reduces the background due to cosmic rays. Credit: Fermilab
August 12, 2016
The COUPP collaboration lowered its bubble chamber into a tunnel on the Fermilab site on March 28, 2005. Moving the bubble chamber 350 feet underground significantly reduces the background due to cosmic rays. Credit: Fermilab