Matches in SemOpenAlex for { <https://semopenalex.org/work/W3198225950> ?p ?o ?g. }
Showing items 1 to 96 of
96
with 100 items per page.
- W3198225950 abstract "Observations of astronomical objects in the far ultraviolet (FUV wavelengths span 900-1800A) from earth's orbit has been impeded due to bright Lyman-{alpha} geocoronal emission. The Johns Hopkins Rocket Group is developing a hydrogen absorption cell that would act as a narrow band Lyman-{alpha} rejection filter to enable space-based photometric observation in bandpasses that span over the Lyman ultraviolet region shortward of the geocoronal line. While this technology has been applied to various planetary missions with single element photomultiplier detectors it has yet to be used on near earth orbiting satellites with a multi-element detector. We are working to develop a cell that could be easily incorporated into future Lyman ultraviolet missions. The prototype cell is a low-pressure (~ few torr) chamber sealed between a pair of MgF2 windows allowing transmission down to 1150 A. It is filled with molecular hydrogen that is converted to its neutral atomic form in the presence of a hot tungsten filament, which allows for the absorption of the Lyman-{alpha} photons. Molecular hydrogen is stored in a fully saturated non-evaporable getter module (St707TM), which allows the cell pressure to be increased under a modest application of heat (a 20 degree rise from room temperature has produced a rise in pressure from 0.6 to 10 torr). Testing is now underway using a vacuum ultraviolet monochromator to characterize the cell optical depth to Lyman-{alpha} photons as functions of pressure and tungsten filament current. We will present these results, along with a discussion of enabled science in broadband photometric applications." @default.
- W3198225950 created "2021-09-13" @default.
- W3198225950 creator A5006932302 @default.
- W3198225950 creator A5015897975 @default.
- W3198225950 creator A5065660482 @default.
- W3198225950 date "2021-09-05" @default.
- W3198225950 modified "2023-09-27" @default.
- W3198225950 title "Lyman-alpha Filter Prototype to Enable Astronomical Photometry in the Lyman Ultraviolet." @default.
- W3198225950 cites W1630876854 @default.
- W3198225950 cites W1985401705 @default.
- W3198225950 cites W1987796965 @default.
- W3198225950 cites W2000637062 @default.
- W3198225950 cites W2001581698 @default.
- W3198225950 cites W2015289078 @default.
- W3198225950 cites W2017139529 @default.
- W3198225950 cites W2035150756 @default.
- W3198225950 cites W2037131602 @default.
- W3198225950 cites W2052646554 @default.
- W3198225950 cites W2066180013 @default.
- W3198225950 cites W2067742799 @default.
- W3198225950 cites W2089662098 @default.
- W3198225950 cites W2090056220 @default.
- W3198225950 cites W2144310152 @default.
- W3198225950 cites W2162123284 @default.
- W3198225950 cites W2747302024 @default.
- W3198225950 cites W2752749250 @default.
- W3198225950 cites W2767347930 @default.
- W3198225950 cites W2791642788 @default.
- W3198225950 cites W2973179520 @default.
- W3198225950 cites W2990910542 @default.
- W3198225950 cites W3016028632 @default.
- W3198225950 cites W3023717689 @default.
- W3198225950 cites W3113000054 @default.
- W3198225950 hasPublicationYear "2021" @default.
- W3198225950 type Work @default.
- W3198225950 sameAs 3198225950 @default.
- W3198225950 citedByCount "0" @default.
- W3198225950 crossrefType "posted-content" @default.
- W3198225950 hasAuthorship W3198225950A5006932302 @default.
- W3198225950 hasAuthorship W3198225950A5015897975 @default.
- W3198225950 hasAuthorship W3198225950A5065660482 @default.
- W3198225950 hasConcept C120665830 @default.
- W3198225950 hasConcept C121332964 @default.
- W3198225950 hasConcept C1276947 @default.
- W3198225950 hasConcept C131432281 @default.
- W3198225950 hasConcept C14112920 @default.
- W3198225950 hasConcept C145148216 @default.
- W3198225950 hasConcept C146024833 @default.
- W3198225950 hasConcept C2776798109 @default.
- W3198225950 hasConcept C4839761 @default.
- W3198225950 hasConcept C520434653 @default.
- W3198225950 hasConcept C559924203 @default.
- W3198225950 hasConcept C62520636 @default.
- W3198225950 hasConcept C6260449 @default.
- W3198225950 hasConcept C99521031 @default.
- W3198225950 hasConceptScore W3198225950C120665830 @default.
- W3198225950 hasConceptScore W3198225950C121332964 @default.
- W3198225950 hasConceptScore W3198225950C1276947 @default.
- W3198225950 hasConceptScore W3198225950C131432281 @default.
- W3198225950 hasConceptScore W3198225950C14112920 @default.
- W3198225950 hasConceptScore W3198225950C145148216 @default.
- W3198225950 hasConceptScore W3198225950C146024833 @default.
- W3198225950 hasConceptScore W3198225950C2776798109 @default.
- W3198225950 hasConceptScore W3198225950C4839761 @default.
- W3198225950 hasConceptScore W3198225950C520434653 @default.
- W3198225950 hasConceptScore W3198225950C559924203 @default.
- W3198225950 hasConceptScore W3198225950C62520636 @default.
- W3198225950 hasConceptScore W3198225950C6260449 @default.
- W3198225950 hasConceptScore W3198225950C99521031 @default.
- W3198225950 hasLocation W31982259501 @default.
- W3198225950 hasOpenAccess W3198225950 @default.
- W3198225950 hasPrimaryLocation W31982259501 @default.
- W3198225950 hasRelatedWork W1485476259 @default.
- W3198225950 hasRelatedWork W1507713868 @default.
- W3198225950 hasRelatedWork W1630070387 @default.
- W3198225950 hasRelatedWork W1644106295 @default.
- W3198225950 hasRelatedWork W1673621220 @default.
- W3198225950 hasRelatedWork W2008472076 @default.
- W3198225950 hasRelatedWork W2015008712 @default.
- W3198225950 hasRelatedWork W2015304239 @default.
- W3198225950 hasRelatedWork W2089652623 @default.
- W3198225950 hasRelatedWork W2101126103 @default.
- W3198225950 hasRelatedWork W2491916139 @default.
- W3198225950 hasRelatedWork W3012270369 @default.
- W3198225950 hasRelatedWork W3016360754 @default.
- W3198225950 hasRelatedWork W304894485 @default.
- W3198225950 hasRelatedWork W3132568100 @default.
- W3198225950 hasRelatedWork W3136258085 @default.
- W3198225950 hasRelatedWork W3169351197 @default.
- W3198225950 hasRelatedWork W3177706598 @default.
- W3198225950 hasRelatedWork W805656556 @default.
- W3198225950 hasRelatedWork W261654949 @default.
- W3198225950 isParatext "false" @default.
- W3198225950 isRetracted "false" @default.
- W3198225950 magId "3198225950" @default.
- W3198225950 workType "article" @default.