Changes

The figure at the right shows the layout of the GlueX experiment. [[Image:Diagram_GlueX.JPG|thumb|150px|Diagram of the GlueX experiment]]

The figure at the right shows the layout of the GlueX experiment. [[Image:Diagram_Glue-X.JPG|thumb|150px|Diagram of the GlueX experiment]]

On the left is the tagging spectrometer and on the right is the GlueX spectrometer. Electrons from the accelerator pass through a diamond crystal just before they enter the tagging spectrometer. Interactions of the high-energy electrons in the diamond produce polarized gamma rays (red rays) of various energies. Most of the gamma rays have very small energy, but every once in a while an electron will have a direct collision with the diamond atoms and produce a gamma ray that carries away a large fraction of the electron's energy, and leave it with a lot less energy than it had when it came out of the accelerator. The gamma rays, both the low-energy and the high-energy ones, travel parallel to the electron beam when they are created. Inside the tagging spectrometer, however, the electrons are bent away from the gamma rays and travel along a curved trajectory (down in the figure) whose curvature depends on their energy. Most of the electrons bend along the gently curve orbit shown in the figure and travel on to the beam dump (white) where they are stopped.

On the left is the tagging spectrometer and on the right is the GlueX spectrometer. Electrons from the accelerator pass through a diamond crystal just before they enter the tagging spectrometer. Interactions of the high-energy electrons in the diamond produce polarized gamma rays (red rays) of various energies. Most of the gamma rays have very small energy, but every once in a while an electron will have a direct collision with the diamond atoms and produce a gamma ray that carries away a large fraction of the electron's energy, and leave it with a lot less energy than it had when it came out of the accelerator. The gamma rays, both the low-energy and the high-energy ones, travel parallel to the electron beam when they are created. Inside the tagging spectrometer, however, the electrons are bent away from the gamma rays and travel along a curved trajectory (down in the figure) whose curvature depends on their energy. Most of the electrons bend along the gently curve orbit shown in the figure and travel on to the beam dump (white) where they are stopped.

Schematic views of the GlueX tagger

Schematic views of the GlueX tagger