December 12th, 2014
A wider shot of the Vulcan 20m3 interaction chamber. The large circle on the right is a 1 metre diameter mirror (reflects the infra red laser light). Through it you can see a door that the laser enters through. This only opens when the chamber is pumped down to a vacuum as the area beyond it is a 100m3 vacuum chamber containing the compression optics which compress the beam into a short pulse and finally focus it. More here: http://www.stfc.ac.uk/clf/44185.aspx