A small, high-performance SAW device has a large electromechanical coupling coefficient and a small number of fingers constituting reflectors, and is constructed such that losses due to electric resistance of the fingers. The method involves receiving the feedwater inlet stream at an inlet of a steam generator and causing the feedwater stream to flow through a tubing circuit to an outlet of the tubing circuit, the tubing circuit having a substantially un-rifled bore defined by a metal wall. Each bias fiber holder holds a bias fiber under tension. The magnetic flux penetrated from the external magnetic field, is suppressed below the inversion strength of the MRAM device 10, thereby improving reliability. Furthermore, the use of the two-component mortar composition for chemically fastening anchoring means in boreholes of different mineral substrates is also described. The actuator includes self contained spacers with semi-kinematic mounting features to accurately locate and secure a set of self-aligning components, thereby eliminating azimuth alignment problems created by conventional assembly procedures.