NDLI: The kinetic effects of HBr partial pressure and gas-flow rate in Cu HyBriD lasers

Content Provider	IEEE Xplore Digital Library
Author	Mildren, R.P. Carman, R.J. Piper, J.A.
Copyright Year	2000
Description	Author affiliation: Centre for Lasers & Applications, Macquarie Univ., North Ryde, NSW, Australia (Mildren, R.P.; Carman, R.J.; Piper, J.A.)
Abstract	In Cu 'HyBrID' lasers (also referred to as Cu-Ne-HBr lasers), the lasant Cu atoms are generated in situ as byproducts of discharge and surface reactions involving solid Cu pieces placed in the tube bore and a controlled amount of HBr gas additive. Though the principal role of the HBr additive is to generate free Cu, the HBr additive also has important positive effects on the plasma kinetics. Cu HyBrlD lasers have yielded several fold increases in laser efficiency (>3%), high beam quality output power (>100W) and optimal operating pulse rate (>17 kHz) compared to conventional copper vapour lasers. These enhancements are primarily attributed to the acceleration of charge neutralisation during the interpulse period via the large HBr cross-section for dissociative electron attachment. We have investigated the effects of HBr partial pressure and buffer-gas flow rate on the kinetics by measuring their effects on the time behaviour of the Cu ground-state density. These density measurements present a powerful method for investigating the key kinetic effects of gas flow since the prepulse ground state density is essentially equal to the free Cu density in the plasma, and the rate of ground state density regrowth is representative of the interpulse rate of neutralisation and quenching of atoms.
File Size	101890
File Format	PDF
ISBN	0780363183
DOI	10.1109/IQEC.2000.908048
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-09-10
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Kinetic theory Gas lasers Copper Power lasers Atom lasers Solid lasers Density measurement Plasma measurements Stationary state Atomic beams
Content Type	Text
Resource Type	Article

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