Development of extensometer for use at cryogenic temperatures.

Refractive Index of ZnSe at Cryogenic Temperatures†

This report describes an extensive data set on the refractive index of ZnSe that provides full high resolution coverage of the CRIRES operating range in both wavelength and temperature. By combining our prototype instrument model of CRIRES with these data our project to provide wavelength calibration for IR Echelle spectrographs (WIRE) has reached an important milestone and is ready to support ...

Fabrication of a Transimpedance Amplifier For Use Under Cryogenic Temperatures

In a superconducting radio-frequency particle accelerator, such as that being developed at Fermilab, it is often important to measure the amount of ionizing radiation emitted by particles due to Bremsstrahlung and other effects, in order to protect the accelerator from damage. Excessive exposure of machine components to this type of radiation can result in a variety of failures. Cryogenic loss ...

Study of Secondary Electron Emission from Niobium at Cryogenic Temperatures

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Dielectric properties of PbNb2O6 ferroelectric ceramics at cryogenic temperatures

Mechanical quality factor of a sapphire fiber at cryogenic temperatures

A mechanical quality factor of 1.1× 107 was obtained for the 199Hz bending vibrational mode in a monocrystalline sapphire fiber at 6K. Consequently, we confirm that pendulum thermal noise of cryogenic mirrors used for gravitational wave detectors can be reduced by the sapphire fiber suspension.