ELECTRON PARAMAGNETIC RESONANCE SPECTROMETRE Russian patent published in 2011 - IPC G01R33/60 G01N24/10 

FIELD: physics.

SUBSTANCE: electron paramagnetic resonance spectrometre has a microwave generator (1) in the 90-100 GHz range, a microwave bridge (20), a system for transmitting microwave power to a sample in form of series-arranged first 3 mm waveguide (2), first horn antenna (3), at least one dielectric lens (4), second horn antenna (5) whose horn faces the horn of the first horn antenna (3), and a second 3 mm waveguide (6). The spectrometre also has a resonator (7), having a piston (8) and sample holder (9), a microwave signal detector (10), a synchronous detector (11), a magnetic field modulation generator (12), modulation coils (13), a magnetic field scan unit (14), a superconducting magnet (15), a cryogenic system (16) for maintaining temperature of liquid helium, having an optical window (17) and a control unit (18). The superconducting magnet (15), modulation coils (13), second horn antenna (5), second 3 mm waveguide (6) and resonator (7) are placed in the cryogenic system (16). The second horn antenna (5) is placed opposite the optical window (17) of the cryogenic system and is connected through the second 3 mm waveguide (5) to the resonator through a coupling aperture. The first horn antenna (3) and at least one dielectric lens (4) are fitted outside the cryogenic system (16) opposite its optical window (17).

EFFECT: reduced heat losses in the cryostat and reduced amount of reflected microwave power.

3 cl, 2 dwg