The field of dynamic nuclear polarization has undergone tremendous developments and
diversification since its inception more than 6 decades ago. In this review we provide an in …

Research involving the tetrahertz (THz) part of the electromagnetic spectrum, commonly
taken to be the region between 0.1 and 10 THz (3 mm to 30 µm), has seen rapid growth in …

We report the experimental demonstration of a gyrotron traveling-wave-tube amplifier at 250
GHz that uses a photonic band gap (PBG) interaction circuit. The gyrotron amplifier achieved …

We report the design and experimental demonstration of a frequency tunable terahertz
gyrotron at 527 GHz built for an 800-MHz dynamic nuclear polarization enhanced nuclear …

The achievable instrument sensitivity is a critical parameter for the continued development of
terahertz (THz) applications. Techniques such as cavity-enhanced techniques and cavity …

The application of radio frequency (RF) vacuum electronics for the betterment of the human
condition began soon after the invention of the first vacuum tubes in the 1920s and has not …

Magic angle spinning (MAS) solid state nuclear magnetic resonance spectroscopy (ssNMR)
can yield unique and insightful information for complex systems; most notably structural and …

In this paper, we describe the design and experimental results from the rebuild of a 250 GHz
gyrotron used for Dynamic Nuclear Polarization enhanced Nuclear Magnetic Resonance …

Gyrotron oscillators are vacuum electron devices that have delivered megawatt average
power levels at millimeter wavelengths. The lack of other sources that are able to match …

The development of terahertz (THz) waveguides is limited by the high-conductivity losses of
metals, the surface roughness, and the high-absorption of the dielectric materials …