Moontanman Posted April 18, 2020 Posted April 18, 2020 Does Transparent aluminum breath new life into the concept of a nuclear light bulb rocket? https://www.azom.com/article.aspx?ArticleID=8095 https://en.wikipedia.org/wiki/Nuclear_lightbulb
Carrock Posted April 18, 2020 Posted April 18, 2020 Well.... From Wikipedia Quote A nuclear lightbulb ..... would be operated at such high temperature (approx. 25,000°C) that the vast majority of the electromagnetic emissions would be in the hard ultraviolet range. while from Azo materials Quote [Transparent aluminum] remains solid up to 1200°C (2190°F).
swansont Posted April 18, 2020 Posted April 18, 2020 9 hours ago, Moontanman said: Does Transparent aluminum breath new life into the concept of a nuclear light bulb rocket? https://www.azom.com/article.aspx?ArticleID=8095 https://en.wikipedia.org/wiki/Nuclear_lightbulb Why would it? What problem does transparent aluminum potentially solve? Please make some kind of connection between the two ends of your conjecture, and have them within reach of each other.
Moontanman Posted April 18, 2020 Author Posted April 18, 2020 11 hours ago, Carrock said: Well.... From Wikipedia while from Azo materials Nuclear light bulb rocket would cool the quartz reactor jackets with the propellant in much the same manner as metal rocket nozzles are cooled by propellant .https://aviation.stackexchange.com/questions/17266/how-are-rocket-engine-nozzles-able-to-survive-very-high-temperatures-without-mel 9 hours ago, swansont said: Why would it? What problem does transparent aluminum potentially solve? Please make some kind of connection between the two ends of your conjecture, and have them within reach of each other. Transparent aluminum melts at a much higher temperature than quartz which is the current material of choice would transparent aluminum be a better choice?
swansont Posted April 18, 2020 Posted April 18, 2020 At ~25,000 ºC the peak wavelength of emission is at ~116 nm, and the transparent aluminum transmission cutoff is ~200 nm, so it would tend to block/absorb much of the light you want transmitted. 1
John Cuthber Posted April 18, 2020 Posted April 18, 2020 I think pretty nearly everything is opaque at 116 nm
swansont Posted April 18, 2020 Posted April 18, 2020 Quartz transmits down to ~150 nm, so the transparent aluminum is worse http://www.tydexoptics.com/materials1/for_transmission_optics/crystal_quartz/ 1
Moontanman Posted April 19, 2020 Author Posted April 19, 2020 18 hours ago, swansont said: Quartz transmits down to ~150 nm, so the transparent aluminum is worse http://www.tydexoptics.com/materials1/for_transmission_optics/crystal_quartz/ Back to the drawing board...
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