A new concept of thin-walled permeation cell has been presented. Such cell can be degassed much faster compared to traditional one (thick-walled). Its low outgassing value enables reliable measurements of very low permeation flux such that arise during measurements through metal membranes with low H solubility. New permeation cell has been tested with Eurofer steel membrane coated with TiAlN coating serving as H barrier.
B.04 Guest lecture
COBISS.SI-ID: 23552551Permeation of hydrogen isotopes from the upstream pressure through a membrane into high vacuum at elevated temperatures is a challenging task when very low flows must be determined. The detection limit and accuracy of results depend on several experimental details. Measurements of the steady permeation flux and its transients require high sensitivity and stability of the gauges. It is also essential that the background represents only a fraction of the signal. We present recent improvements applied on a permeation cell design that results in efficient background suppression.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 23434279