Collimator Cave - Revision history

Bartolotta at 19:19, 14 January 2014

2014-01-14T19:19:39Z

Bartolotta at 18:17, 14 January 2014

2014-01-14T18:17:18Z

Bartolotta at 18:16, 14 January 2014

2014-01-14T18:16:11Z

Bartolotta at 18:15, 14 January 2014

2014-01-14T18:15:04Z

Bartolotta: Created page with " file:jbhd3.jpg|This is where the photon beam first enters Hall D. The tagger hall is 17 meters upstream. file:jbhd4.jpg|This is the apparatus that will hold the act..."

2014-01-13T22:56:08Z

Created page with "<gallery> file:jbhd3.jpg|This is where the photon beam first enters Hall D. The tagger hall is 17 meters upstream. file:jbhd4.jpg|This is the apparatus that will hold the act..."

New page

<gallery>
file:jbhd3.jpg|This is where the photon beam first enters Hall D. The tagger hall is 17 meters upstream.
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:jbhd7.jpg| The backside of the magnet 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.
file:jbhd10.jpg| A piece of equipment to eliminate the secondary photon "halo" around the photon beam.
file:jbhd11.jpg| A second magnet.
file:jbhd12.jpg| This is where the collimated beam will exit the second magnet.
file:jbhd13.jpg| An upstream view of the "Collimator Cave."
file:jbhd14.jpg| 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.
</gallery>

@@ Line 7: / Line 7: @@
 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: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.

@@ Line 5: / Line 5: @@
 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 long tungsten block. There is also a 5 mm diameter hole (to the left).
 file:jbhd7.jpg| The backside of the collimator in the previous pic.
-file:jbhd8(2).jpg| A 0.8 T permanent magnet which is used to 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:jbhd10.jpg| A piece of equipment to eliminate the secondary photon "halo" around the photon beam.
+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:jbhd12.jpg| This is where the collimated beam will exit the second magnet.
+file:jbhd12.jpg| This is where the collimated beam will exit the second, less powerful permanent magnet.
 file:jbhd13.jpg| An upstream view of the "Collimator Cave."
 file:jbhd14.jpg| 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.
 </gallery>

@@ 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.