UHF EPR spectrometer operating at frequencies between 400 MHz and 1 GHz

A 140 GHz pulsed EPR/212 MHz NMR spectrometer for DNP studies.

We described a versatile spectrometer designed for the study of dynamic nuclear polarization (DNP) at low temperatures and high fields. The instrument functions both as an NMR spectrometer operating at 212 MHz ((1)H frequency) with DNP capabilities, and as a pulsed-EPR operating at 140 GHz. A coiled TE(011) resonator acts as both an NMR coil and microwave resonator, and a double balanced ((1)H,...

A 94 GHz EPR Spectrometer with Fabry-Perot Resonator

An EPR spectrometer is described working in the 94 GHz (W-band) frequency range. It comprises a Fabry-Perot type microwave resonator connected to a conventional microwave bridge, a phase lock loop for microwave frequency stabilization, and a superconducting magnet. The improved separation of W-band spectra from two sites with only slightly different ^-factors is demonstrated using an a-bromo ra...

X-Band EPR Spectrometer with Customizable Arbitrary Waveform Generator based on a 1 GHz DAC Board

We present an EPR spectrometer featuring an arbitrary waveform generator (AWG) operating at 8–10 GHz (X-band) that is based on a 1 GHz digital-to-analog converter (DAC) boardwith a 42 dB (i.e. 14-bit) dynamic range. This AWG-capable spectrometer was developedto widen the scope of pulsed electron paramagnetic resonance (EPR) and enable new experiments. It generates shaped X-band pulses with prec...

Electrical conductivity of tissue at frequencies below 1 MHz.

A two-pronged approach, review and measurement, has been adopted to characterize the conductivity of tissues at frequencies below 1 MHz. The review covers data published in the last decade and earlier data not included in recent reviews. The measurements were carried out on pig tissue, in vivo, and pig body fluids in vitro. Conductivity data have been obtained for skeletal and myocardial muscle...

A high-field/high-frequency heterodyne induction-mode electron paramagnetic resonance spectrometer operating at 360 GHz