Closure for shielding the targeting assembly of a particle accelerator

A closure for shielding, and selectively providing access to, the targeting assembly of a particle accelerator, the particle accelerator including a housing defining an opening for accessing the targeting assembly, the particle accelerator being surrounded by an outer shielded enclosure providing selective access to the particle accelerator, said closure comprising:

• first and second doors for selectively covering the opening in the housing of the particle accelerator, each said first and second door being movable from a closed position whereby the targeting assembly is shielded to an open position, whereby access to the targeting assembly is provided, and
• a door mounting assembly for mounting said first and second doors on the housing of the particle accelerator, said door mounting assembly including a frame for being secured about the opening in the particle accelerator accessing the targeting assembly, said door mounting assembly also including a first hinge assembly for pivotally securing said first door to said frame and a second hinge assembly for pivotally securing said second door to said frame, whereby said first and second doors of said closure selectively cover, and reduce radiation emissions from, the opening in the housing of the particle accelerator and the targeting assembly therein when access to the particle accelerator through the outer shielded enclosure is provided.

A closure for shielding, and selectively providing access to, the targeting assembly of a particle accelerator, the particle accelerator including a housing defining an opening for accessing the targeting assembly, the particle accelerator being surrounded by a shielded enclosure providing selective access to the particle accelerator, said closure comprising:

• first and second doors for selectively covering the opening in the housing of the particle accelerator, each said first and second door being fabricated substantially of copper and being movable from a closed position whereby the targeting assembly is shielded to an open position whereby access to the targeting assembly is provided, and
• a door mounting assembly for mounting said first and second doors on the housing of the particle accelerator, said door mounting assembly including a frame for being secured about the opening in the particle accelerator accessing the targeting assembly, said frame being fabricated substantially of copper, said door mounting assembly also including a first hinge assembly for pivotally securing said first door to said frame and a second hinge assembly for pivotally securing said second door to said frame, whereby said first and second doors of said closure selectively cover, and reduce radiation emissions from, the opening in the housing of the particle accelerator and the targeting assembly therein when access to the particle accelerator is provided through the shielded enclosure.