1 fb-1 X-Ray! May 12, 2006Posted by gordonwatts in physics.
Science is sometimes produces the coolest images. This, I think, is one example. It is a closeup X-Ray of the DZERO detector. Andy Haas looked through our 1 fb-1 of data for all cases of two charged particles (“tracks”) intersecting. Each place he found one, he plots a “point” on that graph. The denser the points, the hotter the color. You can clearly see the layers of silicon (the flat lines) and the beam pipe (the circular lines near the center), as well as the support structre and the outter layers.
We don’t actually shine an X-Ray on the detector. The most common source of these 2-track verticies are conversions. A conversion happens when a gamma — a photon — converts to an electron and anti-electron. The x-ray term comes from… well, the gamma — because that is what an x-ray is! Pretty cool, eh? Click for a larger version!