X-Ray Diagnostics of Laser-Produced Aluminum Plasmas
Abstract
Electron temperatures have been evaluated using the x-ray emission from plasmas created by irradiating a solid Aluminum target with a 500MW, 25nsec Nd laser. Studies of the x-ray emission from the plasma at 5 x (10 to the 11th power) W/(cm squared) using the two foil absorption method indicated temperatures ranging from 136 to 185eV. No suprathermal activity was detected for the foil combinations used. Temperature was related to laser flux density by the scaling factor 0.404. Observed temperature remained constant for cratering with up to 25 laser pulses focused at the same spot. Preliminary measurements indicated x-ray intensity was proportional to (p sup 1/4) over the range 10 to 300 microns. Initial work was completed on a vacuum photodiode useful for high resolution photon detection in the soft x-ray region of the spectrum.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1976
- Accession Number
- ADA030085
Entities
People
- Sydney A. Shewchuk
Organizations
- Naval Postgraduate School