RU2013134191A - MAGNETRON WITH STARTING AUTOELECTRONIC EMITTERS ON THE END SCREENS OF CATHODE UNITS - Google Patents

Abstract

1. A magnetron containing a cylindrical anode and a cathode assembly coaxially placed therein, including a secondary-electronic emitter and located at least on one of the end screens, an electron-emitter emitter, characterized in that on one or two end screens electrically connected to the secondary -electronic emitter, placed trigger cathodes that contain one or more combinations of washer activators made of refractory metal containing rare-earth or alkali metal, and in contact with one and whether on both sides with a field emitter, the working edge of which faces the anode and protrudes above the surface of the activator. 2. The magnetron according to claim 1, characterized in that the activators are made in the form of a cone, the angle φ being the inclination of the generatrix selected from the condition: d is the diameter of the secondary electron emitter equal to the diameter of the upper base of the activator, d is the diameter of the lower base of the activator, d is the diameter end screen, h is the thickness of the starting cathode. 3. The magnetron according to claim 1, characterized in that the activators are made in the form of cylinders, and the geometric dimensions correspond to the conditions: d is the diameter of the secondary electron emitter, d is the diameter of the activators, d is the diameter of the end screen, d is the diameter of the field emitter. 4. A magnetron according to any one of claims 1 to 3, characterized in that a cylindrical groove is made on the activator on one or both sides of the field emitter.

Claims (4)

1. A magnetron containing a cylindrical anode and a cathode assembly coaxially placed therein, including a secondary-electronic emitter and located at least on one of the end screens, an electron-emitter emitter, characterized in that on one or two end screens electrically connected to the secondary -electronic emitter, placed trigger cathodes that contain one or more combinations of washer activators made of refractory metal containing rare-earth or alkali metal, and in contact with one and whether on both sides with an autoelectronic emitter, the working edge of which is facing the anode and protrudes above the surface of the activator. 2. The magnetron according to claim 1, characterized in that the activators are made in the form of a cone, and the angle φ - the inclination of the generatrix is selected from the condition: $$0<\varphi \le arctg\frac{(d_2-d_{\mathrm{one}})}{2h};$$

$$d_{\mathrm{one}}<d_2<d_3,gde$$

d ₁ is the diameter of the secondary electronic emitter, equal to the diameter of the upper base of the activator, d ₂ is the diameter of the lower base of the activator, d ₃ is the diameter of the end screen, h is the thickness of the starting cathode. 3. The magnetron according to claim 1, characterized in that the activators are made in the form of cylinders, and the geometric dimensions correspond to the conditions: $$d_{\mathrm{one}}<d_2<d_{\mathrm{four}}<d_3,gde$$

d ₁ is the diameter of the secondary electronic emitter, d ₂ is the diameter of the activators, d ₃ is the diameter of the end screen, d ₄ is the diameter of the field emitter. 4. A magnetron according to any one of claims 1 to 3, characterized in that a cylindrical groove is made on the activator from one or both sides of the field-emitter.