Accession Number:

ADD014348

Title:

Electron Paramagnetic Resonance Instrument with Superconductive Cavity.

Descriptive Note:

Patent Application, Filed 16 Nov 89,

Corporate Author:

DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s):

• Jasper, Louis J., Jr

Report Date:

1989-11-16

Pagination or Media Count:

16.0

Abstract:

The EPR instrument includes an X band klystron used to generate microwave power that is transmitted to a superconductive waveguide cavity resonator. The cavity is placed between the pole pieces of a large d-c magnet and small a-c magnetic coils energized by a modulation signal source. A microwave crystal detector detects RF energy outputted from the cavity. The detector output is amplified, rectified and filtered in a phase sensitive filter that uses the modulation signal source as a reference. The resultant signal is recorded by an amplitude vs. time recorder. The superconductive cavity includes an inner wall of high-temperature superconductive material, a liquid coolant and an insulating sleeve that passes through the cavity. The specimen to be analyzed is placed in the sleeve. Patents application. JHD

Descriptors:

• *ELECTRON PARAMAGNETIC RESONANCE
• *PATENT APPLICATIONS
• ALTERNATING CURRENT
• CAVITIES
• CAVITY RESONATORS
• CRYSTALS
• DIRECT CURRENT
• RADIOFREQUENCY FILTERS
• HIGH TEMPERATURE
• INSULATION
• KLYSTRONS
• LIQUID COOLING
• MAGNET COILS
• MAGNETS
• MATERIALS
• MICROWAVE EQUIPMENT
• MICROWAVES
• MODULATION
• RADIOFREQUENCY POWER
• RECORDING SYSTEMS
• SENSITIVITY
• SIGNALS
• SLEEVES
• SOURCES
• SUPERCONDUCTORS
• TIME SIGNALS
• WAVEGUIDES
• X BAND

Subject Categories:

• Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE