title: A continuous-wave and pulsed electron spin resonance spectrometer operating at 275 GHz.
abstract: An electron paramagnetic resonance (EPR) spectrometer is described which allows for continuous-wave and pulsed EPR experiments at 275 GHz (wavelength 1.1 mm). The related magnetic field of 9.9 T for g approximately 2 is supplied by a superconducting solenoid. The microwave bridge employs quasi-optical as well as conventional waveguide components. A cylindrical, single-mode cavity provides a high filling factor and a high sensitivity for EPR detection. Even with the available microwave power of 1 mW incident at the cavity a high microwave magnetic field B1 is obtained of about 0.1 mT which permits pi/2-pulses as short as 100 ns. The performance of the spectrometer is illustrated with the help of spectra taken with several samples.
authors.affiliation: Huygens Laboratory, Department of Molecular Physics, Leiden University, 2300 RA Leiden, The Netherlands. huib@molphys.leidenuniv.nl
authors.forename: H
authors.initials: H
authors.lastname: Blok
authors.forename: J A J M
authors.initials: JA
authors.lastname: Disselhorst
authors.forename: S B
authors.initials: SB
authors.lastname: Orlinskii
authors.forename: J
authors.initials: J
authors.lastname: Schmidt
mesh_terms: D002244:Carbon / Q000737:chemistry; D004578:Electron Spin Resonance Spectroscopy / Q000295:instrumentation* / Q000379:methods*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005240:Feasibility Studies; D005615:Freezing; D008277:Magnesium Oxide / Q000737:chemistry; D008872:Microwaves; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D015034:Zinc Oxide / Q000737:chemistry
chemical_list: D008277:Magnesium Oxide; D002244:Carbon; D015034:Zinc Oxide