K-band high-pressure cell for ENDOR studies

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Abstract
This article describes a versatile high‐pressure K‐band EPR–ENDOR system, designed for the examination of the effects of hydrostatic pressure on F‐center hyperfine interactions. Dielectric filling is used to minimize the inner dimensions of the pressure cell. Cavity mode and coil geometry permit the same system to be used either for high‐frequency field modulation EPR or for ENDOR by rotating the magnetic field. The pressure seal is also part of a rotatable microwave joint permitting the microwave coupling to be varied by rotating the cavity‐pressure cell assembly. The beryllium–copper high‐pressure vessel is separated from the pressure generating device by high‐pressure transmitting tubing. It has been tested to 18 kilobars.
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