Accession Number : AD0649969

Title :   ABLATING WALL ANNULAR FLASH LAMP.

Descriptive Note : Final rept., Feb 66-Jan 67,

Corporate Author : TRW SYSTEMS REDONDO BEACH CALIF

Personal Author(s) : Goldstein,Robert ; Mastrup,Frithjof N. ; Shackelford,William L.

Report Date : MAR 1967

Pagination or Media Count : 103

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)

Descriptors :   (*LASERS, *OPTICAL PUMPING), (*FLASH LAMPS, OPTICAL PUMPING), QUARTZ, ABLATION, RUBY, NEODYMIUM, ULTRAVIOLET RADIATION, PLASMAS(PHYSICS), CRYSTALS

Subject Categories : Lasers and Masers
      Air Condition, Heating, Lighting & Ventilating
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE