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Electron Paramagnetic Resonance Facility (EPR)

The Electron Paramagnetic Resonance (EPR) laboratory houses a Bruker EMXPplus EPR spectrometer that operates on a microwave frequency range: CW X-Band (9-9.8GHz). Liquid Helium and Nitrogen cryostats.  Other accessories are available for running EPR experiments at a wide range of temperatures. The EPR is located in the basement of Maeser Lab (ML) room 062. 

  • Microwave Frequency: CW X-Band (9.0 - 9.8 GHz).

  • X-band Solid State Ultra Low Noise Microwave Bridge (200 mW max leveled source output, 60 dB max attenuation, 60 MHz tuning range).

  • Integrated Bridge Controller with real time display (automated tuning and cavity matching). Full Ethernet control of all functions.

  • Digital Ultra High Resolution Hall Field Controller (100 G - 18 kG operating range, up to 0 - 18 kG in one scan sweep range).

  • High Linearity Modulation Amplifier Module: 500 Hz - 120 kHz

  • High Sensitivity Probehead with optical window for CW-EPR in X-band (up to 10 mm sample tube access, 20 G max modulation amplitude, automated cavity matching, unloaded Q > 15,000, sensitivity weak pitch: 1800 : 1).

  • Liquid helium cryostat: 4 - 100 K.

 Electron Paramagnetic Resonance

  • Room Temperature

  • Time Scans (kinetics studies)

  •  2D (a second parameter can be varied along with the magnetic field)

  • Cryogenic experiments:

    + VT unit, using liquid nitrogen, range: 100 - 500 K.

    + Liquid helium cryostat, range: 4 - 100 K.


If cryogenic experiments (especially He temperatures range) are planned, please notify NMR/EPR Manager at least 2 weeks in advance. He needs to order the cryogens and prepare the system.

For more information and user training please contact:

Casey Simons
Utah State University
Department of Chemistry and Biochemistry
0300 Old Main Hill
Logan, UT 84322