RESUMEN
This article describes a superconducting microstrip resonator operating at 9.5 GHz (X-band) that is specially designed for pulsed ESR on thin films. A novel configuration consisting of an array of half-wave length microstrip transmission lines generates a uniform magnetic field over a 2-D region of 100×1000 µm(2) with field homogeneity better than 5×10(-2). Using the device, we demonstrate strong coupling of the resonator to an electron spin ensemble and pulsed ESR on Si:P.
Asunto(s)
Espectroscopía de Resonancia por Spin del Electrón/instrumentación , Magnetismo/instrumentación , Ensayo de Materiales/instrumentación , Membranas Artificiales , Procesamiento de Señales Asistido por Computador/instrumentación , Transductores , Conductividad Eléctrica , Diseño de Equipo , Análisis de Falla de Equipo , MiniaturizaciónRESUMEN
An electromagnetically driven normally closed valve for liquid helium is presented, which is meant to regulate the input flow to a 1 K pot. An earlier design is modified to be normally closed (not actuated) and tuned for durability and reliability. A new feature is presented which prevents seat deformation at room temperature and provides comfort and durability for intensive use.