ABLATING WALL ANNULAR FLASH LAMP.
Abstract
A quartz ablating laser pump was constructed and up to 25 kj energy was discharged into it from a pulse forming network with resultant power, current and voltage shapes which closely approximated rectangular 1 msec pulses. The pumps were used to pump ruby and neodymium laser crystals. A quartz ablating repetition rate lamp was constructed and operated at rep rates up to 30 pulses per second and a power dissipation up to 2.4 kw; lamp operation was for at least a minute. In addition, the lamp was used to continuously excite a 1/4 inch diameter by 3 inch neodymium crystal at rep rates up to 6 pps. The ablating lamp research was a continued study of the plasma physical characteristics of Plexiglas and quartz ablating lamps. The latter lamp was tested with Plexiglas and quartz center rods and without a center rod. Quartz ablating lamps were used to irradiate several rare-earth doped laser crystals. Laser emission below 1.1 microns was observed from some of these rods. In particular, emission at 8465 plus or minus 25 A was obtained from a CaF2 (10% ErF3, 0.5% TmF3) crystal; this emission had never before been obtained using standard flash lamps. Finally, the maximum radiative efficiency of a 30 inch long quartz ablating lamp with a pulse duration of 35 microsec was found to be about 30%. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1967
- Accession Number
- AD0649969
Entities
People
- Frithjof N. Mastrup
- Robert Goldstein
- William L. Shackelford