Chopper

The beam chopper consists of a rotating disk with grooves at the outer diameter. When the disk rotates the x-ray is being chopped with the desired opening/closing time. The correct dimensioning of the grooves and the angular velocity provides the maximum opening time and at JJ X-Ray the disk is topologically, and shape optimized considering both the static and dynamic behavior. The chopper can also generate single pulse x-ray with the correct modulation of the angular velocity. In addition, JJ X-Ray offers a complete shutter and timing system able to isolate single pulses with controllable width. The chopper is cased in an aluminum housing, which serves both as a protection and vacuum vessel for HV environment.

Design Features:

• Open/closed period down to 6µs in the standard configuration
• Transmission < 10^9 at 150 keV
• X-ray energies < 150 keV
• System is topologically optimized
• Single pulse isolation
• Custom made solutions
• HV compatible
• Stage integration available