Characterization of a Gaussian Focus for use in Intensity-Selective-Scanning
Abstract
An important parameter in the study of laser-matter interactions is intensity. We have developed a technique that allows for precision intensity selection for use in time-of-flight (TOF) photoelectron and ion spectroscopy. This method uses a small pinhole to selectively expose certain volumes of a gaussian focus to the detector. Through intensity-selective-scanning [ISS], signal gain for low intensity events is increased, and spatial averaging is reduced. For ISS to be effective, there needs to be an experimental determination of the focal characteristics of the beam. BY imaging the spatial characteristics of the laser focus, an absolute intensity calibration can be obtained. Using ISS in conjunction with this optical imaging system provides examiners with a high-precision method for studying laser-matter interactions.
- Publication:
-
APS Ohio Sections Spring Meeting Abstracts
- Pub Date:
- May 1997
- Bibcode:
- 1997APS..OSS..CA05L