Design, Construction and Evaluation of a High Pressure, High Electric Field Optoacoustic Detector.
Final rept. 23 Jun-31 Dec 75,
CASE WESTERN RESERVE UNIV CLEVELAND OHIO DEPT OF ELECTRICAL ENGINEERING AND APPLIED PHYSICS
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A high pressure, high electric field optoacoustic detector system has been designed, constructed and evaluated. The system consists of an incoherent infrared radiation source, a prismmonochromator combination for wavelength tuning purposes, a high pressure gas cell with CaF2 windows, an internal sensitive microphone and amplifier assembly, a radiation chopper and high voltage electric feed-through and electrodes. It has been determined that the cell can operate up to internal gas pressures of 40 atmospheres and up to electric fields of 30 kvcm. A preliminary study of the dependence of optoacoustic signal on pressure has been carried out and these results are also reported herein. There is the possibility of using this equipment to determine basic parameters characterizing the collision andor electric field induced infrared absorption cross-sections for homonuclear diatomic molecules such as hydrogen, nitrogen and oxygen. If those cross-sections are reasonably large, a new type of high energy laser might be made available.
- Lasers and Masers
- Infrared Detection and Detectors
- Atomic and Molecular Physics and Spectroscopy