Electromechanical x-ray generator

Patent metadata

Field	Value
Publication number	US-9330878-B2
Application number	US-201514736973-A
Country	US
Kind code	B2
Filing date	Jun 11, 2015
Priority date	Jun 18, 2014
Publication date	May 3, 2016
Grant date	May 3, 2016

Abstract

An electro-mechanical x-ray generator configured to obtain high-energy operation with favorable energy-weight scaling. The electro-mechanical x-ray generator may include a pair of capacitor plates. The capacitor plates may be charged to a predefined voltage and may be separated to generate higher voltages on the order of hundreds of kV in the AK gap. The high voltage may be generated in a vacuum tube.

First claim

The invention claimed is:

1. An apparatus, comprising:
a vacuum tube configured to generate high voltage electrons or high voltage ions, and comprises:
a high voltage source configured to charge a pair of capacitor plates to a predefined voltage, wherein
the pair of capacitor plates comprises a first plate and a second plate configured to produce a higher voltage over an AK gap than the predefined voltage, when the distance between the first plate and the second plate increases, and

the second plate comprises an emitter to allow breakdown emission of electrons to occur.

2. The apparatus of claim 1 , wherein the vacuum tube is further configured to generate x-rays.

3. The apparatus of claim 1 , wherein a charge separation is used to produce the higher voltage.

4. The apparatus of claim 3 , wherein the charge separation is achieved when the first plate and the second plate are separated from each other.

5. The apparatus of claim 1 , further comprising:
one or more actuators configured to place one or more discontinuous contactors in contact with the first plate, second plate, or both, wherein
the one or more discontinuous contactors are configured to charge the first plate, the second plate, or both to a predefined voltage.

6. The apparatus of claim 5 , wherein when the first plate, the second plate, or both are charged to the predefined voltage, the one or more actuators are further configured to retract the one or more discontinuous contactors.

7. The apparatus of claim 1 , further comprising:
one or more cams configured to increase separation between the first plate and the second plate after the first plate and the second plate are charged to a predefined voltage, wherein
the increase of separation between the first plate and the second plate increase the predefined voltage on an order of at least tens of kilovolts.

8. The apparatus of claim 7 , wherein the one or more cams are driven by a one or more torsion springs or motor drives.

9. The apparatus of claim 1 , wherein an increase of voltage on the second plate causes an emission of electrons or ions to ground or into an accelerator beamline.

10. The apparatus of claim 9 , wherein the electrons are used to generate x-rays, or ions used for ion implantation.

11. The apparatus of claim 1 , wherein the AK gap is located between an emitter and a target anode to create x-rays.

12. The apparatus of claim 11 , wherein the emitter is configured to cause focused electrons to accelerate across the AK gap to the target anode, as the distance between the first plate and the second plate increases.

13. The apparatus of claim 12 , wherein the emitter comprises cold-cathode material.

14. The apparatus of claim 1 , wherein a size and weight of the vacuum tube scale linearly with an energy of a generated x-ray.

15. The apparatus of claim 1 , wherein a size and weight of the vacuum corresponds to a specific use.

16. The apparatus of claim 1 , wherein the vacuum tube is further configured to convert mechanical energy into high voltage at an efficiency of 90 percent or greater.

17. The apparatus of claim 1 , wherein the vacuum tube is further configured to generate a cold-cathode electron or ion gun.

18. The apparatus of claim 1 , the vacuum tube is configured to generate a promptly triggered x-ray source by use of a laser-triggered photocathode.

19. An electro-mechanical x-ray generator, comprising:
a pair of capacitor plates configured to be charged to a predefined voltage, wherein
the pair of capacitor plates are further configured to achieve a charge separation generating a higher voltage than the predefined voltage when a first plate and a second plate are separated from each other, wherein
the second plate comprises an emitter to allow breakdown emission of electrons to occur, and
the higher voltage is generated in a vacuum.

Assignees

• Los Alamos Nat Security Llc
• Los Alamos Nat Security Llc

Inventors

• Watson Scott A
• Platts David
• Sorensen Eric B

Classifications

• G01G1/10

  with a plurality of pendulums · CPC title

• H01J21/36

  Tubes with flat electrodes, e.g. disc electrode · CPC title

• H01J35/065

  Field emission, photo emission or secondary emission cathodes · CPC title

• H01J27/022

  Details · CPC title

• H05G1/10

  Power supply arrangements for feeding the X-ray tube {(supply circuits with converters in general H02M; supply circuits for emitters and amplifiers H04B1/16 - H04B1/1623)} · CPC title