Improved Langmuir probe surface coatings for the Cassini satellite

Wahlström, Maria; Johansson, Edvin; Veszelei, E.; Bennich, P.; Olsson, Mikael; Hogmark, Sture

doi:10.1016/0040-6090(92)90591-x

Cited by 34 publications

(15 citation statements)

References 9 publications

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“…Probes and stubs have a coating of titanium nitride (TiN), applied by TiSurf International, Uppsala, Sweden. The work function of TiN is very homogeneous: about 15 meV variation over the probe surface has been found in the laboratory (Wahlström et al, 1992), enabling electron temperature measurements down to the same range of values (Brace, 1998). In addition, TiN is mechanically robust and chemically inert.…”

Section: Sensorsmentioning

confidence: 96%

RPC-LAP: The Rosetta Langmuir Probe Instrument

et al. 2006

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The Rosetta dual Langmuir probe instrument, LAP, utilizes the multiple powers of a pair of spherical Langmuir probes for measurements of basic plasma parameters with the aim of providing detailed knowledge of the outgassing, ionization, and subsequent plasma processes around the Rosetta target comet. The fundamental plasma properties to be studied are the plasma density, the electron temperature, and the plasma flow velocity. However, study of electric fields up to 8 kHz, plasma density fluctuations, spacecraft potential, integrated UV flux, and dust impacts is also possible. LAP is fully integrated in the Rosetta Plasma Consortium (RPC), the instruments of which together provide a comprehensive characterization of the cometary plasma.

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Section: Sensorsmentioning

confidence: 96%

RPC-LAP: The Rosetta Langmuir Probe Instrument

et al. 2006

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“…The instrument is practically a single electrode (Fig. 2) floating in the plasma (Mott-Smith and Langmuir, 1926;Bettinger and Chen, 1968;Brace, 1998;Wahlströ m et al, 2002;Lebreton et al, 2006). The electrode is biased with voltages in the range À7 V to +7 V and the current flowing through the electrode will be measured as a function of the applied potential.…”

Section: The Lmp Plasma Diagnostic Probementioning

confidence: 98%

The relationship between plasma effects and cosmic radiation studied with TriTel-LMP measurements during the ESEO mission

Zábori¹,

Hirn²,

Bencze³

2011

Advances in Space Research

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“…The work function of the TiN coating is very homogeneous [6] , which is very critical for the low electron temperature measurement. In addition, the TiN coating is chemically inert and has very good mechanical and tribological properties [6] , which are all the important properties for a good performance of the Langmuir probe for a long duration in space. The TiN coating has been successfully used on Langmuir probes on some satellites, such as Demeter [7] , Cassini [8] , Rosetta [9] , Astrid-2 [10] and so on.…”

Section: Sensorsmentioning

confidence: 99%

The design of the Langmuir probe onboard a seismo-electromagnetic satellite

Guan

Wang²,

Liu

et al. 2011

SPIE Proceedings

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The double Langmuir probe, as a payload of a seism-electromagnetic satellite, has been designed for in situ measurements of the parameters of the ionosphere plasma on the 500km altitude orbit to research the electromagnetic coupling between the solid-earth activities and the ionosphere disturbances. The Langmuir probe is comprised of two spherical sensors: the diameter of the smaller one is 1cm and the other one is 5cm. The two sensors are mounted on two parallel booms on the satellite, which are half meter far from each other. The two main ionosphere parameters measured by the Langmuir probe are electron density and electron temperature, which are computed from the I-V curves. The I-V curve is given by a current flow through a sensor in case of a sweep voltage is applied to the sensor. There are three main work modes for the Langmuir probe: the normal mode, the burst mode and the decontamination mode. The normal mode is for the general measurement of the ionosphere parameters around the globe with 1s time resolution, while the burst mode is to measure the ionosphere over the interested areas, like the areas with more earthquake activities, with 0.5s time resolution. The decontamination mode would work if the I-V curves shown hysteresis phenomenon, which indicated that the sensors may be contaminated by the outgassing of the satellite. The description of the Langmuir probe instrument and its capabilities are provided.

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Improved Langmuir probe surface coatings for the Cassini satellite

Cited by 34 publications

References 9 publications

RPC-LAP: The Rosetta Langmuir Probe Instrument

RPC-LAP: The Rosetta Langmuir Probe Instrument

The relationship between plasma effects and cosmic radiation studied with TriTel-LMP measurements during the ESEO mission

The design of the Langmuir probe onboard a seismo-electromagnetic satellite

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