Changes

file:jbhd4.jpg|This is the apparatus that will hold the active collimator.

file:jbhd4.jpg|This is the apparatus that will hold the active collimator.

file:jbhd5.jpg|A pic of me next to the future home of the active collimator. Photo credit to Sascha.

file:jbhd5.jpg|A pic of me next to the future home of the active collimator. Photo credit to Sascha.

file:jbhd6.jpg| You can see the hole through which the photon beam will travel in this pic. The blue housing is a magnet to deter the electrons and positrons formed by pair production.

file:jbhd6.jpg| You can see the collimating hole through which the photon beam will travel in this pic; it is 3.4 mm in diameter, and is comprised of a 30 cm tungsten block. There is also a 5 mm diameter hole (to the left).

file:jbhd7.jpg| The backside of the magnet in the previous pic.

file:jbhd7.jpg| The backside of the collimator in the previous pic.

file:jbhd8(2).jpg|The second, "primary" collimator.

file:jbhd8(2).jpg|The second, "primary" collimator.

file:jbhd8.jpg| A downstream shot of the collimator cave. That's Sascha on the right.

file:jbhd8.jpg| A downstream shot of the collimator cave. That's Sascha on the right.