Ultrasonic sensor system for CaF2 interface monitoring with rods permanently embedded in crystal by R. L. Royer Jr. and J. L. Rose

Crystal Research and Technology

Cryst. Res. Technol. 40, 761 (2005) - Abstract -

Ultrasonic sensor system for CaF₂ interface monitoring with rods permanently embedded in crystal

R. L. Royer Jr. and J. L. Rose

Department of Engineering Science and Mechanics, Pennsylvania State University, University Park, PA 16802, USA

Keywords	ultrasonics, crystal growth, time of flight (TOF), calcium fluoride
PACS	43.60.Bf, 81.10.Fq, 43.58.Dj, 43.20.Mv
DOI	10.1002/crat.200410426

The interface position of a CaF₂ crystal was successfully monitored during growth using an innovative ultrasonic sensor system. The sensor system utilizes a top entry approach consisting of probe rods permanently positioned at the bottom of the crucible. Ultrasonic time of flight data (TOF) is used to determine interface position.

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