High speed x-ray beam chopper
First Claim
1. A device for chopping x-ray beams emanating from a source, the device comprising a rotating disk, said disk defining a channel extending along a diameter of said disk wherein the source is pulsating, wherein the angular position of said channel on said rotating disk can be phase locked to said pulsating source, and wherein the variation in the time required for each revolution in the rotational speed of the channel is less than 5 ppm.
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Accused Products
Abstract
A fast, economical, and compact x-ray beam chopper with a small mass and a small moment of inertia whose rotation can be synchronized and phase locked to an electronic signal from an x-ray source and be monitored by a light beam is disclosed. X-ray bursts shorter than 2.5 microseconds have been produced with a jitter time of less than 3 ns.
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Citations
17 Claims
- 1. A device for chopping x-ray beams emanating from a source, the device comprising a rotating disk, said disk defining a channel extending along a diameter of said disk wherein the source is pulsating, wherein the angular position of said channel on said rotating disk can be phase locked to said pulsating source, and wherein the variation in the time required for each revolution in the rotational speed of the channel is less than 5 ppm.
- 8. A device for chopping x-ray beams comprising a rotating disk having a first side and a second side, said disk defining a passage extending along the entire diameter of the disk.
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11. A device for chopping x-ray beams comprising:
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a disk having a channel extending along a diameter of said disk and positioned at a specific height relative to a base face of said disk;
a shaft connecting said disk to a motor;
an first electrical means for powering said motor and a second electrical means for controlling said motor'"'"'s speed;
an optical means for determining a speed associated with said disk and for communicating said speed to said second electrical means;
an x-ray beam incident on said disk where said x-ray beam strikes said disk at a specific incident frequency and at a position on said disk coincident with said position of said channel relative to said base of said disk. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification