Scientific Imaging System.
Abstract
Acquisition of all the necessary components for the scientific imaging system based on absorption and fluorescence spectroscopy for the measurement of concentration and nucleation rate during non-equilibrium synthesis by laser is almost complete. The list of equipment for the assembly of this unique diagnostic system is enclosed. Major components include a 20 W argon-Ion laser and a Ring-Dye laser with various associated electronics. Equipment which has already been delivered and is currently working are marked. The remaining few are in the process of acquisition, awaiting the evaluation of the core laser scanning and detection system. This phased purchase will allow us to specify the remaining electronics to match the performance of core-laser scanning system. The diagnostic technique using this system will involve performing absorption and fluorescence spectroscopy on the plasma produced by a laser beam impinging upon the metallic surface. The diagnostic spectroscopy will use a tunable dye laser (Coherent 899-28) to probe a particular transition originating in the ground state of niobium and aluminum. The absorption cross- section at the wavelength of interest (5252 A (Nb) and 3961 A (A1) may be calculated using the tabulated values for the oscillator strengths of the various transitions between hyperfine levels which contribute to absorption at this wavelength.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 07, 1991
- Accession Number
- ADA239059
Entities
People
- Jyotirmoy Mazumder
Organizations
- Illinois Institute of Technology