German COIL efforts: status and perspectives
Bohn, W.L. (2002) German COIL efforts: status and perspectives. Photonics West, San Jose (California USA), 19. - 25. Januar 2002.
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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 % 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 µm is demonstrated and theoretically scaled up to relevant power levels.
|Document Type:||Conference or Workshop Item (Paper)|
|Title:||German COIL efforts: status and perspectives|
|Keywords:||chemical lasers, oxygen, iodine, power extraction, decommissioning|
|Event Title:||Photonics West, San Jose (California USA), 19. - 25. Januar 2002|
|HGF - Research field:||Energy|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||L - no assignement|
|DLR - Research area:||Energy|
|DLR - Program:||L - no assignement|
|DLR - Research theme (Project):||L - Laser Research and Technology|
|Institutes and Institutions:||Institute of Technical Physics|
|Deposited By:||Dr.rer.nat. Hans-Albert Eckel|
|Deposited On:||16 Sep 2005|
|Last Modified:||06 Jan 2010 14:50|
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