title: Thermal dimensional instabilities of beryllium mirrors.
abstract: A method for evaluating the thermal dimensional stability and homogeneity of beryllium mirrors is described. Thermal dimensional instabilities are shown to be highly dependent on crystalline anisotropy. An x-ray quality control technique is discussed which can be used to predict optical performance under changes in ambient temperature.
authors.forename: W R
authors.initials: WR
authors.lastname: Goggin
authors.forename: J W
authors.initials: JW
authors.lastname: Moberly