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Updated: May 6, 2026

Do-It-Yourself Device for Recovery of Cryopreserved Samples Accidentally Dropped into Cryogenic Storage Tanks

Do-It-Yourself Device for Recovery of Cryopreserved Samples Accidentally Dropped into Cryogenic Storage Tanks

Published on: May 11, 2012

A cryogenic receiver for EPR.

R Narkowicz¹, H Ogata², E Reijerse²

¹Department of Physics, TU Dortmund University, Otto-Hahn-Str. 4, D-44221 Dortmund, Germany.

Journal of Magnetic Resonance (San Diego, Calif. : 1997)

|October 29, 2013

Summary

This summary is machine-generated.

We developed a compact cryogenic Electron Paramagnetic Resonance (EPR) receiver, significantly reducing noise by 2.5x. This enhances sensitivity for low-power EPR measurements, enabling new research possibilities.

Keywords:

Cryogenic receiver Planar microresonators Sensitivity Signal-to-noise ratio

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Area of Science:

Physical Chemistry
Spectroscopy
Materials Science

Background:

Cryogenic probes enhance Nuclear Magnetic Resonance (NMR) sensitivity.
Electron Paramagnetic Resonance (EPR) spectroscopy requires sensitive detection methods.

Purpose of the Study:

To present a compact Electron Paramagnetic Resonance (EPR) receiver design for cryogenic operation.
To analyze the noise performance and sensitivity improvements of the cryogenic EPR receiver.

Main Methods:

Designed a compact EPR receiver for cryogenic temperatures.
Analyzed noise performance from 20K to room temperature.
Utilized high-efficiency planar microresonators for low microwave power operation.

Main Results:

Achieved a noise reduction factor of approximately 2.5 compared to room temperature operation.
Input noise density closely matched cooled resistor emission at low microwave power.
Demonstrated EPR measurements with ultra-low microwave power levels (nW range).

Conclusions:

The compact cryogenic EPR receiver offers significantly improved sensitivity.
High-efficiency microresonators enable sensitive EPR at very low microwave power.
This design advances EPR spectroscopy for various scientific applications.