Random Physics Picture

Inside the window on the 6-way cross is a molybdenum plug. The left, flat surface of the plug is the newly-deposited cesium telluride photocathode. This plug will be transferred, under ultrahigh vacuum, to an accelerator photoinjector, where it will become the source of electrons for a research linear accelerator. The "spring" that you can see imbedded around the plug is to enhance electrical contact of the plug to the wall of the photoinjector.

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