German COIL efforts: status and perspectives

Willy L. Bohn

doi:10.1117/12.465792

6 May 2002 German COIL efforts: status and perspectives

Willy L. Bohn

Proceedings Volume 4631, Gas and Chemical Lasers and Intense Beam Applications III; (2002) https://doi.org/10.1117/12.465792
Event: High-Power Lasers and Applications, 2002, San Jose, California, United States

Abstract

Historically, COIL research in Germany has started with microwave excitation of an oxygen flow. But soon all efforts have been devoted to the chemical generation of excited singlet oxygen and have eventually given rise to a supersonic 10 kW class rotating disk driven device. A diode based diagnostic provides data of small signal gain and cavity temperature which emphasize the role of iodine injection for different penetration conditions. Heat release can lead to substantially higher temperatures as expected from adiabatic expansion. Power extraction is found to be in good agreement with theoretical predictions. Alternatively, small scale liquid jet generator experiments show encouraging 60 percent efficiency. Besides air defense related applications and a study on space debris removal, results are given which are pertinent to the decommissioning of nuclear installations. In particular, laser cutting of concrete at 1.3 micrometers is demonstrated and theoretically scaled up to relevant power levels.

Citation Download Citation

Willy L. Bohn "German COIL efforts: status and perspectives", Proc. SPIE 4631, Gas and Chemical Lasers and Intense Beam Applications III, (6 May 2002); https://doi.org/10.1117/12.465792

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