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TWINS1, Lyman-alpha Detector, LAD

ResourceID
spase://SMWG/Instrument/TWINS1/LAD

Description

TWINS1, 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.

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Details

Version:2.4.0

Instrument

ResourceID
spase://SMWG/Instrument/TWINS1/LAD
ResourceHeader
ResourceName
TWINS1, Lyman-alpha Detector, LAD
ReleaseDate
2022-02-20 12:34:56.789
RevisionHistory
RevisionEvent
ReleaseDate
2022-02-20 12:34:56.789
Note
Assorted Observatories and Instruments: Files reformated. Metadata submitted by J.M. Weygand on 2021-11-16, reviewed by LFB
Description

TWINS1, 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.

Acknowledgement
D.J. McComas, Mission Principal Investigator, J. Goldstein, General Contact
Contacts
RolePersonStartDateStopDateNote
1.GeneralContactspase://SMWG/Person/Jerry.Goldstein
2.MetadataContactspase://SMWG/Person/Lee.Frost.Bargatze
3.MetadataContactspase://SMWG/Person/James.M.Weygand
InformationURL
Name
NASA Master Catalog TWINS1 Lyman-alpha Detector
URL
Description

Lyman-alpha Detector, LAD, Information and Details

InstrumentType
Imager
InvestigationName
Two Wide-angle Imaging Neutral-atom Spectrometer, TWINS
OperatingSpan
StartDate
2006-06-28 03:33:00
ObservatoryID