2.4.0 spase://SMWG/Instrument/TWINS2/LAD TWINS2, Lyman-alpha Detector, LAD 2022-02-20T12:34:56.789 2022-02-20T12:34:56.789 Assorted Observatories and Instruments: Files reformated. Metadata submitted by J.M. Weygand on 2021-11-16, reviewed by LFB TWINS2, Lyman-alpha Detector, LAD, The TWINS Lyman-alpha detector consists of two independent sensors to measure Lyman-alpha radiation being emitted by neutral hydrogen atoms. The sensors are oriented at angles of ±40° with respect to the actuator spin axis. Each sensor has a full width, half maximum, FWHM, field of view of 4° defined by collimation hole baffles, uses Lyman-a interference filters as narrow band transmissions filters, and applies a KBr or CsI photodiode for photon detection. The Lyman-alpha detector is located on the rotating actuator platform in order to provide a full 360° azimuthal angle coverage. It has a time resolution of 60 s. D.J. McComas, Mission Principal Investigator, J. Goldstein, General Contact spase://SMWG/Person/Jerry.Goldstein GeneralContact spase://SMWG/Person/Lee.Frost.Bargatze MetadataContact spase://SMWG/Person/James.M.Weygand MetadataContact NASA Master Catalog TWINS2 Lyman-alpha Detector https://nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=2008-010A-02 Lyman-alpha Detector, LAD, Information and Details Imager Two Wide-angle Imaging Neutral-atom Spectrometer, TWINS 2008-03-13T10:02:00 spase://SMWG/Observatory/TWINS2