Difference between revisions of "Collimator Cave"

Revision as of 18:15, 14 January 2014

This is where the photon beam first enters Hall D. The tagger hall is 17 meters upstream.
This is the apparatus that will hold the active collimator.
A pic of me next to the future home of the active collimator. Photo credit to Sascha.
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).
The backside of the collimator in the previous pic.
The second, "primary" collimator.
A downstream shot of the collimator cave. That's Sascha on the right.
A piece of equipment to eliminate the secondary photon "halo" around the photon beam.
A second magnet.
This is where the collimated beam will exit the second magnet.
An upstream view of the "Collimator Cave."
The collimated beam will travel through this opening to the main room of Hall D, where the Barrel Calorimeter (BCAL) and Forward Calorimeter (FCAL) are located.

@@ Line 3: / Line 3: @@
 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: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.jpg| A downstream shot of the collimator cave. That's Sascha on the right.