Difference between revisions of "Collimator Cave"
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file:jbhd8(2).jpg| A 0.8 T permanent magnet which is used to sweep away the various particles (positrons, electrons, compton, showers, etc) from the result of collimation. | file:jbhd8(2).jpg| A 0.8 T permanent magnet which is used to sweep away the various particles (positrons, electrons, compton, showers, etc) from the result of collimation. | ||
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. | ||
| + | file:jbhd9.jpg| A vacuum chamber. The particles that form as a result of the collimation will be steered into a lead block that will be installed below it. | ||
file:jbhd10.jpg| A second collimator to eliminate the secondary photon "halo" around the photon beam. The halo is a result of primary collmation. | file:jbhd10.jpg| A second collimator to eliminate the secondary photon "halo" around the photon beam. The halo is a result of primary collmation. | ||
file:jbhd11.jpg| A second magnet. | file:jbhd11.jpg| A second magnet. | ||
Latest revision as of 19:19, 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 long tungsten block. There is also a 5 mm diameter hole (to the left).
The backside of the collimator in the previous pic.
A 0.8 T permanent magnet which is used to sweep away the various particles (positrons, electrons, compton, showers, etc) from the result of collimation.
A downstream shot of the collimator cave. That's Sascha on the right.
A vacuum chamber. The particles that form as a result of the collimation will be steered into a lead block that will be installed below it.
A second collimator to eliminate the secondary photon "halo" around the photon beam. The halo is a result of primary collmation.
A second magnet.
This is where the collimated beam will exit the second, less powerful permanent 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.
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