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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: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: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: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: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: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.
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.
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