Abstract: Some practical questions associated with the use of hyperboloidal “trumpet” shaped terminal concentrators for use in solar thermal applications are addressed. Computer ray-trace calculations show ...

Abstract: The National Aeronautics and Space Administration (NASA) has been studying (as of 1996) a possibility to return to the Moon in 2001 or 2002. The mission will involve many lunar surface activities and may include a concrete ...

Abstract: We have achieved a 50,000 ± 3,000 times concentration of sunlight using a unique dielectric nonimaging concentrator in an experiment performed at the National Renewable Energy Laboratory. ...