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词条 Alice (spacecraft instrument)
释义

  1. Overview

  2. Naming

  3. Alice on New Horizons

  4. Alice on Rosetta

  5. See also

  6. References

Alice is an ultraviolet imaging spectrometer for spacecraft, with one used on the New Horizons spacecraft, and another on the Rosetta spacecraft.[1] Alice is a small telescope with spectrograph and a special detector with 32 pixels each with 1024 spectral channels detecting ultraviolet light.[2]

Alice has an off-axis telescope which sends light to a Rowland-circle spectrograph, and the instrument has a field of view of 6 degrees.[3] It is designed to capture airglow and solar occultation at the same time, and has two inputs to allow this.[4]

Overview

Alice uses an array of potassium bromide and caesium iodide type photocathodes. It detects in the extreme and far ultraviolet spectrum, from {{convert|700|-|2050|Å|nm|abbr=on}} wavelengths of light.[5][6]

Alice is intended, among its capabilities, to detect ultraviolet signatures of noble (aka inert) gases including helium, neon, argon, and krypton.[7] Alice should also be able to detect water, carbon monoxide, and carbon dioxide in the ultraviolet.[8]

ALICE was built and operated by the Southwest Research Institute for NASA's Jet Propulsion Laboratory.[9]

Naming

Alice is named after a character in The Honeymooners (1950s television show),[10] along with another New Horizons instrument, Ralph.

Alice on New Horizons

In August 2018, NASA confirmed, based on results by Alice on the New Horizons spacecraft, the detection of a "hydrogen wall" at the outer edges of the Solar System that was first detected in 1992 by the two Voyager spacecraft which have detected a surplus of ultraviolet light determined to be coming from hydrogen.[11][12]

The New Horizons version of Alice uses an average power of 4.4 watts and weighs 4.5 kg (9.9 pounds).[13]

Examples
Name Wavelength Bandpass Aperture(s)
Human eye 400–700 nm (approx.)[14] 0.6 cm[15]
LORRI 350 – 850 nm 20.8 cm
Alice 70-205 nm[16][17] (two; 40 x 40 mm2
1 mm [18]
{{Clear}}

Alice on Rosetta

On Rosetta, a mission to a comet, ALICE performed ultraviolet spectroscopy to search and quantify the noble gas content in the comet nucleus.[19][20]

On Rosetta it is an {{convert|3.1|kg|abbr=on}} instrument which uses 2.9 watts.[21][22]

See also

  • UVS (Juno) (ultraviolet imaging spectrometer on Juno Jupiter orbiter)
  • Ultraviolet–visible spectroscopy
  • List of New Horizons topics

References

1. ^{{Cite web|url=http://www.boulder.swri.edu/palice/|title=The New Horizons Alice UV Spectrometer|website=www.boulder.swri.edu|access-date=2018-10-20}}
2. ^{{Cite web|url=http://pluto.jhuapl.edu/Mission/Spacecraft/index.php|title=New Horizons|website=pluto.jhuapl.edu|language=en|access-date=2018-10-20}}
3. ^{{Cite web|url=https://www.researchgate.net/publication/241259848_ALICE_The_ultraviolet_imaging_spectrograph_aboard_the_New_Horizons_Pluto_mission_spacecraft|title=(PDF) ALICE: The ultraviolet imaging spectrograph aboard the New Horizons Pluto mission spacecraft|website=ResearchGate|language=en|access-date=2018-12-19}}
4. ^{{Cite web|url=https://www.researchgate.net/publication/241259848_ALICE_The_ultraviolet_imaging_spectrograph_aboard_the_New_Horizons_Pluto_mission_spacecraft|title=(PDF) ALICE: The ultraviolet imaging spectrograph aboard the New Horizons Pluto mission spacecraft|website=ResearchGate|language=en|access-date=2018-12-19}}
5. ^{{cite journal |title=Alice: The Rosetta Ultraviolet Imaging Spectrograph |journal=Space Science Reviews |first1=S. A. |last1=Stern |first2=D. C. |last2=Slater |first3=J. |last3=Scherrer |first4=J. |last4=Stone |first5=M. |last5=Versteeg |first6=M. F. |last6=A'Hearn |first7=J. L. |last7=Bertaux |first8=P. D. |last8=Feldman |first9=M. C. |last9=Festou |first10=Joel Wm. |last10=Parker |first11=O. H. W. |last11=Siegmund |display-authors=5 |volume=128 |issue=1–4 |pages=507–527 |date=February 2007 |doi=10.1007/s11214-006-9035-8 |bibcode=2007SSRv..128..507S |arxiv=astro-ph/0603585}}
6. ^{{cite journal |title=Alice—An Ultraviolet Imaging Spectrometer for the Rosetta Orbiter |journal=Advances in Space Research |first1=S. A. |last1=Stern |first2=D. C. |last2=Slater |first3=W. |last3=Gibson |first4=J. |last4=Scherrer |first5=M. |last5=A'Hearn |first6=J. L. |last6=Bertaux |first7=P. D. |last7=Feldman |first8=M. C. |last8=Festou |display-authors=5 |volume=21 |issue=11 |pages=1517–1525 |year=1998 |doi=10.1016/S0273-1177(97)00944-7 |bibcode=1998AdSpR..21.1517S}}
7. ^{{Cite web|url=https://rosetta.jpl.nasa.gov/us-instruments/alice-overview|title=ALICE Overview {{!}} Rosetta|website=rosetta.jpl.nasa.gov|language=en|access-date=2018-10-20}}
8. ^{{Cite web|url=https://rosetta.jpl.nasa.gov/us-instruments/alice-overview|title=ALICE Overview {{!}} Rosetta|website=rosetta.jpl.nasa.gov|language=en|access-date=2018-10-20}}
9. ^{{cite web |url=http://www.swri.org/9what/releases/2014/rosetta-alice.htm |title=Rosetta-Alice spectrograph to begin first-ever close up ultraviolet studies of comet surface and atmosphere |publisher=Southwest Research Institute |date=10 June 2014 |accessdate=28 December 2016}}
10. ^{{Cite web|url=http://www.museum.tv/eotv/honeymooners.htm|title=The Museum of Broadcast Communications - Encyclopedia of Television - Honeymooners, The|website=www.museum.tv|access-date=2018-12-31}}
11. ^{{cite journal |author=Gladstone, G. Randall|display-authors=et al |title=The Lyman‐α Sky Background as Observed by New Horizons |url=https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2018GL078808 |date=7 August 2018 |journal=Geophysical Research Letters |doi=10.1029/2018GL078808 |accessdate=10 August 2018 }}
12. ^{{cite web |last=Letzter |first=Rafi |title=NASA Spotted a Vast, Glowing 'Hydrogen Wall' at the Edge of Our Solar System |url=https://www.livescience.com/63297-hydrogen-wall-glowing-interstellar-space.html |date=9 August 2018 |work=Live Science |accessdate=10 August 2018 }}
13. ^{{Cite web|url=http://pluto.jhuapl.edu/Mission/Spacecraft/index.php|title=New Horizons|website=pluto.jhuapl.edu|language=en|access-date=2018-10-20}}
14. ^{{Cite news|url=https://www.thoughtco.com/the-visible-light-spectrum-2699036|title=What Is the Visible Light Spectrum?|work=ThoughtCo|access-date=2018-11-09}}
15. ^{{Cite news|url=https://www.popphoto.com/news/2012/06/how-to-calculate-f-stop-human-eye|title=How to Calculate the F-stop of the Human Eye|work=Popular Photography|access-date=2018-11-09|language=en}}
16. ^{{cite journal |title=Alice: The Rosetta Ultraviolet Imaging Spectrograph |journal=Space Science Reviews |first1=S. A. |last1=Stern |first2=D. C. |last2=Slater |first3=J. |last3=Scherrer |first4=J. |last4=Stone |first5=M. |last5=Versteeg |first6=M. F. |last6=A'Hearn |first7=J. L. |last7=Bertaux |first8=P. D. |last8=Feldman |first9=M. C. |last9=Festou |first10=Joel Wm. |last10=Parker |first11=O. H. W. |last11=Siegmund |display-authors=5 |volume=128 |issue=1–4 |pages=507–527 |date=February 2007 |doi=10.1007/s11214-006-9035-8 |bibcode=2007SSRv..128..507S |arxiv=astro-ph/0603585}}
17. ^{{cite journal |title=Alice—An Ultraviolet Imaging Spectrometer for the Rosetta Orbiter |journal=Advances in Space Research |first1=S. A. |last1=Stern |first2=D. C. |last2=Slater |first3=W. |last3=Gibson |first4=J. |last4=Scherrer |first5=M. |last5=A'Hearn |first6=J. L. |last6=Bertaux |first7=P. D. |last7=Feldman |first8=M. C. |last8=Festou |display-authors=5 |volume=21 |issue=11 |pages=1517–1525 |year=1998 |doi=10.1016/S0273-1177(97)00944-7 |bibcode=1998AdSpR..21.1517S}}
18. ^3.1
19. ^{{cite journal |title=Alice: The Rosetta Ultraviolet Imaging Spectrograph |journal=Space Science Reviews |first1=S. A. |last1=Stern |first2=D. C. |last2=Slater |first3=J. |last3=Scherrer |first4=J. |last4=Stone |first5=M. |last5=Versteeg |first6=M. F. |last6=A'Hearn |first7=J. L. |last7=Bertaux |first8=P. D. |last8=Feldman |first9=M. C. |last9=Festou |first10=Joel Wm. |last10=Parker |first11=O. H. W. |last11=Siegmund |display-authors=5 |volume=128 |issue=1–4 |pages=507–527 |date=February 2007 |doi=10.1007/s11214-006-9035-8 |bibcode=2007SSRv..128..507S |arxiv=astro-ph/0603585}}
20. ^{{cite journal |title=Alice—An Ultraviolet Imaging Spectrometer for the Rosetta Orbiter |journal=Advances in Space Research |first1=S. A. |last1=Stern |first2=D. C. |last2=Slater |first3=W. |last3=Gibson |first4=J. |last4=Scherrer |first5=M. |last5=A'Hearn |first6=J. L. |last6=Bertaux |first7=P. D. |last7=Feldman |first8=M. C. |last8=Festou |display-authors=5 |volume=21 |issue=11 |pages=1517–1525 |year=1998 |doi=10.1016/S0273-1177(97)00944-7 |bibcode=1998AdSpR..21.1517S}}
21. ^{{cite journal |title=Alice: The Rosetta Ultraviolet Imaging Spectrograph |journal=Space Science Reviews |first1=S. A. |last1=Stern |first2=D. C. |last2=Slater |first3=J. |last3=Scherrer |first4=J. |last4=Stone |first5=M. |last5=Versteeg |first6=M. F. |last6=A'Hearn |first7=J. L. |last7=Bertaux |first8=P. D. |last8=Feldman |first9=M. C. |last9=Festou |first10=Joel Wm. |last10=Parker |first11=O. H. W. |last11=Siegmund |display-authors=5 |volume=128 |issue=1–4 |pages=507–527 |date=February 2007 |doi=10.1007/s11214-006-9035-8 |bibcode=2007SSRv..128..507S |arxiv=astro-ph/0603585}}
22. ^{{cite journal |title=Alice—An Ultraviolet Imaging Spectrometer for the Rosetta Orbiter |journal=Advances in Space Research |first1=S. A. |last1=Stern |first2=D. C. |last2=Slater |first3=W. |last3=Gibson |first4=J. |last4=Scherrer |first5=M. |last5=A'Hearn |first6=J. L. |last6=Bertaux |first7=P. D. |last7=Feldman |first8=M. C. |last8=Festou |display-authors=5 |volume=21 |issue=11 |pages=1517–1525 |year=1998 |doi=10.1016/S0273-1177(97)00944-7 |bibcode=1998AdSpR..21.1517S}}
{{NH1}}{{Rosetta mission}}{{Satellite and spacecraft instruments}}

4 : Spacecraft instruments|New Horizons|Rosetta mission|Spectrometers
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