Improving COIL Efficiency By Iodine Pre-Dissociation Via Corona Discharge In The Transonic Section Of The Secondary Flow

摘要

This report results from a contract tasking Ben-Gurion University of the Negev as follows: We intend to carry out a comprehensive experimental study of I2 pre-dissociation, based on applying corona discharge in the transonic section of the secondary flow in the COIL supersonic nozzle. The main issues to be addressed are the following: 1. Determination of conditions for maximum dissociation fraction F of I2 caused by the corona discharge. 2. Experimental measurements of the lasing power and small signal gain with and without the iodine predissociation caused by the corona discharge and determination of the power enhancement factor. There will be two stages in the proposed experimental study of I2 pre-dissociation. Facilities: The equipment available at BGU includes a supersonic COIL setup with different mixing nozzles and three diode laser based diagnostic systems for H2O, O2 and I atoms for probing the COIL active medium. Also available are a variety of optical, electronic and computing equipment, including He-Ne lasers, lock-in amplifiers, optical fibers, power supplies, optical windows, halogen lamps and an on-line laboratory computer. Schedule: Report will be delivered at the end of the contract.