Magnetic focusing of x-ray tubes and system for operating

• US 3,374,355 A
• Filed: 02/21/1946
• Issued: 03/19/1968
• Est. Priority Date: 02/21/1946
• Status: Expired due to Term

• Current Assignee: Finlayson L. Taylor, Frederick Reines, Kenneth I. Greisen, Lyman G. Parratt, Trevor R. Cuykendall
• Original Assignee: Finlayson L. Taylor, Frederick Reines, Kenneth I. Greisen, Lyman G. Parratt, Trevor R. Cuykendall
• Inventors: Parratt, Lyman G., Cuykendall, Trevor R., Greisen, Kenneth I., Taylor, Finlayson L., Reines, Frederick
• Application Number:
  US02/649,413
• Time in Patent Office: 8,062 Days
• US Class Current: 378/103
• CPC Class Codes: H01J 35/147 Spot size control

Claims

1. A SYSTEM FOR OPERATING AN X-RAY GENERATOR COMPRISING IN COMBINATION AN X-RAY TUBE HAVING AN AXIALLY SPACED ANODE AND ELECTRON EMISSIVE CATHODE, A COIL SURROUNDING SAID TUBE FOR PRODUCING A MAGNETIC FIELD IN THE DIRECTION OF SAID AXIS;

MEANS FOR RAPIDLY PRODUCING A PULSED INTENSE MAGNETIC FLUX COMPRISING A SOURCE OF SURGE CURRENT, AND MEANS FOR CONNECTING SAID SURGE CURRENT TO SAID COIL, MEANS RESPONSIVE TO A SELECTED PREDTEREMINED MAGNITUDE OF SAID SURGE CURRENT FOR APPLYING A SOURCE OF SURGE VOLTAGE TO SAID ANODE AND SAID CATHODE, MEANS FOR DEVELOPING A POTENTIAL HAVING AN AMPLITUDE VARIABLE IN TIME IN ACCORDANCE WITH SAID FLUX, A CATHODE RAY OSCILLOSCOPE, MEANS FOR APPLYING SAID POTENTIAL TO ONE PAIR OF DEFLECTING PLATES OF SAID OSCILLATOR, MEANS FOR APPLYING A SWEEP VOLTAGE TO THE OTHER OF SAID DEFLECTING PLATES SIMULTANEOUSLY WITH THE APPLICATION OF SAID SURGE CURRENT TO SAID COIL, AND MEANS FOR APPLYING THE SURGE VOLTAGE DISCHARGE ALSO TO SAID FIRST NAMED DEFLECTION PLATES, WHEREBY SAID PREDETERMINED MAGNITUDE MAY BE SELECTED SO THAT SAID SURGE VOLTAGE IS APPLIED WHEN THE MAGNETIC FLUX PRODUCED BY SAID COIL IS MAXIMUM.