THE LOW-ENERGY PARTICLE (LEP) EXPERIMENT ONBOARD THE GEOTAIL SATELLITE

被引:473
作者
MUKAI, T
MACHIDA, S
SAITO, Y
HIRAHARA, M
TERASAWA, T
KAYA, N
OBARA, T
EJIRI, M
NISHIDA, A
机构
[1] KYOTO UNIV,INST GEOPHYS,KYOTO 606,JAPAN
[2] UNIV TOKYO,DEPT EARTH & PLANETARY PHYS,TOKYO 113,JAPAN
[3] KOBE UNIV,FAC ENGN,KOBE 657,JAPAN
[4] NATL INST POLAR RES,TOKYO 173,JAPAN
来源
JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY | 1994年 / 46卷 / 08期
关键词
D O I
10.5636/jgg.46.669
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The low energy particle (LEP) instrument onboard GEOTAIL is designed to make comprehensive observations of plasma and energetic electrons and ions with fine temporal resolution in the terrestrial magnetosphere (mainly magnetotail) and in the interplanetary medium. It consists of three units of sensors (LEP-EA, LEP-SW and LEP-MS) and a common electronics (LEP-E). The Energy-per-charge Analyzers (EA) measure three-dimensional velocity distributions of electrons (with EA-e) and ions (with EA-i), simultaneously and separately, over the energy-per-charge range of several eV/q to 43 keV/q. Emphasis in the EA design is laid on the large geometrical factor to measure tenuous plasma in the magnetotail with sufficient counting statistics in the high-time-resolution measurement. On the other hand, the Solar Wind ion analyzer (SW) has smaller geometrical factor, but fine angular and energy resolutions, to measure energy-per-charge spectra of the solar wind ions. In both EA and SW sensors, the complete three-dimensional velocity distributions can only be obtained in a period of four spins, while the velocity moments up to the third order are calculated onboard every spin period (nominally, 3 sec). The energetic-ion Mass Spectrometer (MS) can provide three-dimensional determinations of the ion composition. In this paper, we describe the instrumentation and present some examples of the inflight measurements.
引用
收藏
页码:669 / 692
页数:24
相关论文
共 24 条
  • [1] SHAPING OF THE MAGNETOTAIL FROM THE MANTLE - GLOBAL AND LOCAL STRUCTURING
    ASHOURABDALLA, M
    BERCHEM, JP
    BUCHNER, J
    ZELENYI, LM
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1993, 98 (A4) : 5651 - 5676
  • [2] AVERAGE PLASMA AND MAGNETIC-FIELD VARIATIONS IN THE DISTANT MAGNETOTAIL ASSOCIATED WITH NEAR-EARTH SUBSTORM EFFECTS
    BAKER, DN
    ANDERSON, RC
    ZWICKL, RD
    SLAVIN, JA
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1987, 92 (A1): : 71 - 81
  • [3] BAUMJOHANN W, 1993, IN PRESS SPACE SCI R
  • [4] POLAR WIND ION DYNAMICS IN THE MAGNETOTAIL
    DELCOURT, DC
    SAUVAUD, JA
    MOORE, TE
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1993, 98 (A6) : 9155 - 9169
  • [5] THE PLASMA SHEET BOUNDARY-LAYER
    EASTMAN, TE
    FRANK, LA
    PETERSON, WK
    LENNARTSSON, W
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1984, 89 (NA3): : 1553 - &
  • [6] EFFECTS OF A LONG ENTRANCE APERTURE UPON AZIMUTHAL RESPONSE OF SPHERICAL SECTION ELECTROSTATIC ANALYZERS
    GOSLING, JT
    ASBRIDGE, JR
    BAME, SJ
    FELDMAN, WC
    [J]. REVIEW OF SCIENTIFIC INSTRUMENTS, 1978, 49 (09) : 1260 - 1268
  • [7] FURTHER DETERMINATION OF THE CHARACTERISTICS OF MAGNETOSPHERIC PLASMA VORTICES WITH ISEE-1 AND ISEE-2
    HONES, EW
    BIRN, J
    BAME, SJ
    ASBRIDGE, JR
    PASCHMANN, G
    SCKOPKE, N
    HAERENDEL, G
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1981, 86 (NA2): : 814 - 820
  • [8] STRUCTURE OF THE MAGNETOTAIL AT 220-RE AND ITS RESPONSE TO GEOMAGNETIC-ACTIVITY
    HONES, EW
    BAKER, DN
    BAME, SJ
    FELDMAN, WC
    GOSLING, JT
    MCCOMAS, DJ
    ZWICKL, RD
    SLAVIN, JA
    SMITH, EJ
    TSURUTANI, BT
    [J]. GEOPHYSICAL RESEARCH LETTERS, 1984, 11 (01) : 5 - 7
  • [9] ION COMPOSITION AND ENERGY-DISTRIBUTION DURING 10 MAGNETIC STORMS
    LENNARTSSON, W
    SHARP, RD
    SHELLEY, EG
    JOHNSON, RG
    BALSIGER, H
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1981, 86 (NA6): : 4628 - 4638
  • [10] LUI AT, 1987, MAGNETOTAIL PHYSICS