Abstract
The Cassini Plasma Spectrometer (CAPS) will make comprehensive three-dimensional mass-resolved measurements of the full variety of plasma phenomena found in Saturn's magnetosphere. Our fundamental scientific goals are to understand the nature of saturnian plasmas primarily their sources of ionization, and the means by which they are accelerated, transported, and lost. In so doing the CAPS investigation will contribute to understanding Saturn's magnetosphere and its complex interactions with Titan, the icy satellites and rings, Saturn's ionosphere and aurora, and the solar wind. Our design approach meets these goals by emphasizing two complementary types of measurements: high-time resolution velocity distributions of electrons and all major ion species; and lower-time resolution, high-mass resolution spectra of all ion species. The CAPS instrument is made up of three sensors: the Electron Spectrometer (ELS), the Ion Beam Spectrometer (IBS), and the Ion Mass Spectrometer (IMS). The ELS measures the velocity distribution of electrons from 0.6 eV to 28,250 keV, a range that permits coverage of thermal electrons found at Titan and near the ring plane as well as more energetic trapped electrons and auroral particles. The IBS measures ion velocity distributions with very high angular and energy resolution from 1 eV to 49,800 keV. It is specially designed to measure sharply defined ion beams expected in the solar wind at 9.5 AU, highly directional rammed ion fluxes encountered in Titan's ionosphere, and anticipated field-aligned auroral fluxes. The IMS is designed to measure the composition of hot, diffuse magnetospheric plasmas and low-concentration ion species 1 eV to 50,280 eV with an atomic resolution M/ΔM ∼70 and, for certain molecules, (such asN 2 + and CO+), effective resolution as high as ∼2500. The three sensors are mounted on a motor-driven actuator that rotates the entire instrument over approximately one-half of the sky every 3 min.
| Original language | English |
|---|---|
| Pages (from-to) | 1-112 |
| Number of pages | 112 |
| Journal | Space Science Reviews |
| Volume | 114 |
| Issue number | 1-4 |
| DOIs | |
| Publication status | Published - 1 Dec 2004 |
| MoE publication type | Not Eligible |
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Keywords
- Ion composition
- Magnetosphere
- Saturn
- Space plasma
- Titan
Cite this
}
Cassini plasma spectrometer investigation. / Young, D. T.; Berthelier, J. J.; Blanc, M.; Burch, J. L.; Coates, A. J.; Goldstein, R.; Grande, M.; Hill, T. W.; Johnson, R. E.; Kelha, V.; Mccomas, D. J.; Sittler, E. C.; Svenes, K. R.; Szegö, K.; Tanskanen, P.; Ahola, K.; Anderson, D.; Bakshi, S.; Baragiola, R. A.; Barraclough, B. L.; Black, R. K.; Bolton, S.; Booker, T.; Bowman, R.; Casey, P.; Crary, F. J.; Delapp, D.; Dirks, G.; Eaker, N.; Funsten, H.; Furman, J. D.; Gosling, J. T.; Hannula, H.; Holmlund, C.; Huomo, H.; Illiano, J. M.; Jensen, P.; Johnson, M. A.; Linder, D. R.; Luntama, T.; Maurice, S.; Mccabe, K. P.; Mursula, K.; Narheim, B. T.; Nordholt, J. E.; Preece, A.; Rudzki, J.; Ruitberg, A.; Smith, K.; Szalai, S.; Thomsen, M. F.; Viherkanto, K.; Vilppola, J.; Vollmer, T.; Wahl, T. E.; Wüest, M.; Ylikorpi, T.; Zinsmeyer, C.
In: Space Science Reviews, Vol. 114, No. 1-4, 01.12.2004, p. 1-112.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Cassini plasma spectrometer investigation
AU - Young, D. T.
AU - Berthelier, J. J.
AU - Blanc, M.
AU - Burch, J. L.
AU - Coates, A. J.
AU - Goldstein, R.
AU - Grande, M.
AU - Hill, T. W.
AU - Johnson, R. E.
AU - Kelha, V.
AU - Mccomas, D. J.
AU - Sittler, E. C.
AU - Svenes, K. R.
AU - Szegö, K.
AU - Tanskanen, P.
AU - Ahola, K.
AU - Anderson, D.
AU - Bakshi, S.
AU - Baragiola, R. A.
AU - Barraclough, B. L.
AU - Black, R. K.
AU - Bolton, S.
AU - Booker, T.
AU - Bowman, R.
AU - Casey, P.
AU - Crary, F. J.
AU - Delapp, D.
AU - Dirks, G.
AU - Eaker, N.
AU - Funsten, H.
AU - Furman, J. D.
AU - Gosling, J. T.
AU - Hannula, H.
AU - Holmlund, C.
AU - Huomo, H.
AU - Illiano, J. M.
AU - Jensen, P.
AU - Johnson, M. A.
AU - Linder, D. R.
AU - Luntama, T.
AU - Maurice, S.
AU - Mccabe, K. P.
AU - Mursula, K.
AU - Narheim, B. T.
AU - Nordholt, J. E.
AU - Preece, A.
AU - Rudzki, J.
AU - Ruitberg, A.
AU - Smith, K.
AU - Szalai, S.
AU - Thomsen, M. F.
AU - Viherkanto, K.
AU - Vilppola, J.
AU - Vollmer, T.
AU - Wahl, T. E.
AU - Wüest, M.
AU - Ylikorpi, T.
AU - Zinsmeyer, C.
PY - 2004/12/1
Y1 - 2004/12/1
N2 - The Cassini Plasma Spectrometer (CAPS) will make comprehensive three-dimensional mass-resolved measurements of the full variety of plasma phenomena found in Saturn's magnetosphere. Our fundamental scientific goals are to understand the nature of saturnian plasmas primarily their sources of ionization, and the means by which they are accelerated, transported, and lost. In so doing the CAPS investigation will contribute to understanding Saturn's magnetosphere and its complex interactions with Titan, the icy satellites and rings, Saturn's ionosphere and aurora, and the solar wind. Our design approach meets these goals by emphasizing two complementary types of measurements: high-time resolution velocity distributions of electrons and all major ion species; and lower-time resolution, high-mass resolution spectra of all ion species. The CAPS instrument is made up of three sensors: the Electron Spectrometer (ELS), the Ion Beam Spectrometer (IBS), and the Ion Mass Spectrometer (IMS). The ELS measures the velocity distribution of electrons from 0.6 eV to 28,250 keV, a range that permits coverage of thermal electrons found at Titan and near the ring plane as well as more energetic trapped electrons and auroral particles. The IBS measures ion velocity distributions with very high angular and energy resolution from 1 eV to 49,800 keV. It is specially designed to measure sharply defined ion beams expected in the solar wind at 9.5 AU, highly directional rammed ion fluxes encountered in Titan's ionosphere, and anticipated field-aligned auroral fluxes. The IMS is designed to measure the composition of hot, diffuse magnetospheric plasmas and low-concentration ion species 1 eV to 50,280 eV with an atomic resolution M/ΔM ∼70 and, for certain molecules, (such asN 2 + and CO+), effective resolution as high as ∼2500. The three sensors are mounted on a motor-driven actuator that rotates the entire instrument over approximately one-half of the sky every 3 min.
AB - The Cassini Plasma Spectrometer (CAPS) will make comprehensive three-dimensional mass-resolved measurements of the full variety of plasma phenomena found in Saturn's magnetosphere. Our fundamental scientific goals are to understand the nature of saturnian plasmas primarily their sources of ionization, and the means by which they are accelerated, transported, and lost. In so doing the CAPS investigation will contribute to understanding Saturn's magnetosphere and its complex interactions with Titan, the icy satellites and rings, Saturn's ionosphere and aurora, and the solar wind. Our design approach meets these goals by emphasizing two complementary types of measurements: high-time resolution velocity distributions of electrons and all major ion species; and lower-time resolution, high-mass resolution spectra of all ion species. The CAPS instrument is made up of three sensors: the Electron Spectrometer (ELS), the Ion Beam Spectrometer (IBS), and the Ion Mass Spectrometer (IMS). The ELS measures the velocity distribution of electrons from 0.6 eV to 28,250 keV, a range that permits coverage of thermal electrons found at Titan and near the ring plane as well as more energetic trapped electrons and auroral particles. The IBS measures ion velocity distributions with very high angular and energy resolution from 1 eV to 49,800 keV. It is specially designed to measure sharply defined ion beams expected in the solar wind at 9.5 AU, highly directional rammed ion fluxes encountered in Titan's ionosphere, and anticipated field-aligned auroral fluxes. The IMS is designed to measure the composition of hot, diffuse magnetospheric plasmas and low-concentration ion species 1 eV to 50,280 eV with an atomic resolution M/ΔM ∼70 and, for certain molecules, (such asN 2 + and CO+), effective resolution as high as ∼2500. The three sensors are mounted on a motor-driven actuator that rotates the entire instrument over approximately one-half of the sky every 3 min.
KW - Ion composition
KW - Magnetosphere
KW - Saturn
KW - Space plasma
KW - Titan
U2 - 10.1007/s11214-004-1406-4
DO - 10.1007/s11214-004-1406-4
M3 - Article
AN - SCOPUS:20144389909
VL - 114
SP - 1
EP - 112
JO - Space Science Reviews
JF - Space Science Reviews
SN - 0038-6308
IS - 1-4
ER -