We describe a submicrosecond resonator and receiver system acquisition time (more than 30 min) is not compatible with for use in pulsed magnetic resonance at 220 MHz. This new resonathe biological half-lives of the paramagnetic probes of intor and receiver system design enables a reduction of the dead terest.
time, and in principle its complete elimination. We show experi-
Recently RF pulsed (time domain) EPR has been promentally that the resonator and receiver system permits the detecposed as a means to overcome this problem (7). However, tion of free induction decay signals 300 ns from the end of the with pulsed magnetic resonance there are many technical transmitting pulse, even with large (55-ml) saline samples. This issues to be addressed: magnetic field homogeneity and staapparatus was specifically developed for in vivo Fourier transform bility, pulse power level, pulse width, amplitude of the irradielectron paramagnetic resonance detection of free radicals; howating magnetic field for a given power level, receiver dead ever, it can also be used in pulsed nuclear magnetic resonance time, time resolution, and digitization rate. In previous work, imaging of solids with applications in materials research and the polymer industry.