CW maser with electromagnetic resonant circuit

Patent metadata

Field	Value
Publication number	US-10707637-B2
Application number	US-201616066440-A
Country	US
Kind code	B2
Filing date	Dec 21, 2016
Priority date	Dec 30, 2015
Publication date	Jul 7, 2020
Grant date	Jul 7, 2020

Abstract

The invention concerns a maser having an electromagnetic resonant circuit comprising a pick-up coil, a capacitance and a filter coil, an active medium of organic or maser-capable molecules in the pick-up coil as well as a population inversion device for generating a population inversion in the active medium.

First claim

The invention claimed is:

1. A maser having an electromagnetic resonant circuit, the electromagnetic resonant circuit of the maser comprising a pick-up coil, a capacitance and a filter coil, an active medium of organic or maser-capable molecules in the pick-up coil as well as a population inversion device for generating a population inversion in the active medium,
wherein the population inversion device comprises para hydrogen for the generation of the population inversion in the active medium in such a way that the organic or maser-capable molecules can be brought to negative spin temperature.

2. The maser of claim 1 , wherein the population inversion device comprises a catalyst for generating a population inversion in the active medium.

3. The maser of claim 1 , wherein the active medium is a liquid.

4. The maser of claim 1 , wherein the active medium comprises methanol-d 4 .

5. The maser of claim 1 , wherein the active medium comprises pyridine or acetonitrile.

6. The maser of claim 1 , wherein the active medium comprises 1.17 mg [IrCl(cod)(IMes)].

7. The maser of claim 1 , wherein the filter coil and capacitance have a high quality of at least 100 or the quality of the resonant circuit is at least 200.

8. The maser of claim 1 or 7 , wherein the filter coil comprises a grounded center tapping.

9. The maser of claim 1 or 7 , wherein the quality of the filter coil and the quality of the capacitor exceed the quality of the pick-up coil at least by twice.

10. The maser of claim 1 , wherein the filter coil is shielded by at least one of an electrical and magnetic shield.

11. The maser of claim 1 , wherein there is an excitation coil that is separated from the pick-up coil.

12. The maser of claim 1 , wherein the pick-up coil on the one hand and the capacitor and filter coil on the other hand are connected to each other by a low-loss electrical transfer line.

13. The maser of claim 12 , wherein the transfer line is formed of two strands that are twisted together.

Assignees

• Forschungszentrum Juelich Gmbh

Inventors

• Appelt Stephan
• Süfke Martin

Classifications

• G01R33/60

  using electron paramagnetic resonance (G01R33/24, G01R33/62 take precedence) · CPC title

• H01S4/00

  Devices using stimulated emission of electromagnetic radiation in wave ranges other than those covered by groups H01S1/00, H01S3/00 or H01S5/00, e.g. phonon masers, X-ray lasers or gamma-ray lasers · CPC title

• H01S1/04 Primary

  liquid · CPC title

• H01S1/02

  solid · CPC title