ABSTRACT
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.
Subject(s)
Electron Spin Resonance Spectroscopy/instrumentation , Magnetics/instrumentation , Materials Testing/instrumentation , Membranes, Artificial , Signal Processing, Computer-Assisted/instrumentation , Transducers , Electric Conductivity , Equipment Design , Equipment Failure Analysis , MiniaturizationABSTRACT
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.
