Electromagnetic interference containment for accelerator systems

• US 10,546,711 B2
• Filed: 07/23/2019
• Issued: 01/28/2020
• Est. Priority Date: 08/24/2016
• Status: Active Grant

• Current Assignee: Varian Medical Systems Incorporated (Siemens AG)
• Original Assignee: Varian Medical Systems Incorporated (Siemens AG)
• Inventors: Trail, Mark E., Potter, Rudolf H.
• Primary Examiner(s): Ferguson, Dion
• Assistant Examiner(s): Sathiraju, Srinivas
• Application Number:
  US16/519,840
• Publication Number:
  US 20190348248A1
• Time in Patent Office: 189 Days
• Field of Search: None
• CPC Class Codes: H01J 23/14 Leading-in arrangements; Seals therefor
• CPC Class Codes: H01J 23/15 Means for preventing wave energy leakage structurally associated with tube leading-in arrangements, e.g. filters, chokes, attenuating devices
• CPC Class Codes: H01J 29/003 Arrangements for eliminating unwanted electromagnetic effects, e.g. demagnetisation arrangements, shielding coils H01J29/06, H01J29/867 take precedence; demagnetisation in general H01F13/00; circuit arrangements therefor H04N9/29; screening of apparatus against electric or magnetic fields H05K9/00
• CPC Class Codes: H01J 29/485 Construction of the gun or of parts thereof H01J29/481, H01J29/482, H01J29/484 and H01J29/487 take precedence
• CPC Class Codes: H01J 29/96 One or more circuit elements structurally associated with the tube

Abstract

An apparatus for coupling to an input connection of an electron gun, the input connection having a heater terminal and a cathode terminal, includes: a connector having a first end and a second end; wherein the first end of the connector is configured to attach to a cable; wherein the second end of the connector is configured to connect to the input connection of the electron gun; and wherein the connector comprises an opening configured to receive the heater terminal of the input connection of the electron gun.

Claims

1. An apparatus for coupling to an input connection of an electron gun, the input connection having a heater terminal and a cathode terminal, the apparatus comprising:

a connector having a first end and a second end;

wherein the first end of the connector is configured to attach to a cable;

wherein the second end of the connector is configured to connect to the input connection of the electron gun;

wherein the connector comprises an opening configured to receive the heater terminal of the input connection of the electron gun;

wherein the apparatus further comprises a tube, and a seal structure disposed at one end of the tube, the seal structure having an opening for receiving the cable, wherein the seal structure has a curvilinear inner surface, and wherein a distance between the curvilinear inner surface and the cable varies non-linearly as a function of a position along a longitudinal axis of the cable.

2. The apparatus of claim 1, wherein the connector has a bullet shape.

3. The apparatus of claim 1, wherein the first end of the connector has a cross sectional dimension that varies non-linearly.

4. The apparatus of claim 1, wherein the heater terminal comprises a pin.

5. The apparatus of claim 1, wherein the cathode terminal of the electron gun comprises a cylindrical connector, and wherein the second end of the connector has an outer cross sectional dimension sized to fit within the cylindrical connector of the electron gun.

6. The apparatus of claim 5, wherein the second end of the connector comprises a coil, and wherein the coil is configured to circumferentially engage the cylindrical connector of the electron gun.

7. The apparatus of claim 1, wherein the connector comprises a first section with the opening, wherein the first section is configured for connection with a first wire from the cable.

8. The apparatus of claim 7, wherein the connector comprises a second section configured for connection with a second wire from the cable, wherein the second section is electrically coupled to a circular structure circumferentially disposed around the first section.

9. The apparatus of claim 1, wherein the connector comprises a first section with first plurality of connection terminals for connection with respective cathode wires from the cable.

10. The apparatus of claim 9, wherein the connector comprises a second section with a second plurality of connection terminals for connection with respective heater wires from the cable.

11. The apparatus of claim 9, wherein the first section comprises the opening.

12. The apparatus of claim 10, wherein the second section is electrically coupled to a circular structure circumferentially disposed around the first section.

13. The apparatus of claim 1, wherein the tube is disposed around a component of the electron gun.

14. The apparatus of claim 13, wherein the tube is slidable relative to the component of the electron gun.

15. The apparatus of claim 13, wherein the tube has a wall with a first opening and a second opening.

16. The apparatus of claim 15, wherein the first opening and the second opening are at respective opposite sides of the tube.

17. The apparatus of claim 13, wherein the tube is configured to contain potting material.