Patent classifications
G
PHYSICS
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G21
NUCLEAR PHYSICS; NUCLEAR ENGINEERING
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G21K
HANDLING OF PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
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1/00
Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
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G21K1/02
using diaphragms, collimators
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G21K1/04
using variable diaphragms, shutters, choppers
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G21K1/043
changing time structure of beams by mechanical means, e.g. choppers, spinning filter wheels
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