EP2103198A1 - Dispositif accelerateur de plasma - Google Patents

Dispositif accelerateur de plasma

Info

Publication number
EP2103198A1
EP2103198A1 EP07846645A EP07846645A EP2103198A1 EP 2103198 A1 EP2103198 A1 EP 2103198A1 EP 07846645 A EP07846645 A EP 07846645A EP 07846645 A EP07846645 A EP 07846645A EP 2103198 A1 EP2103198 A1 EP 2103198A1
Authority
EP
European Patent Office
Prior art keywords
magnetic
arrangement
plasma chamber
plasma
region
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP07846645A
Other languages
German (de)
English (en)
Other versions
EP2103198B1 (fr
Inventor
Hans-Peter Harmann
Norbert Koch
Günter KORNFELD
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thales Electronic Systems GmbH
Original Assignee
Thales Electron Devices GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thales Electron Devices GmbH filed Critical Thales Electron Devices GmbH
Publication of EP2103198A1 publication Critical patent/EP2103198A1/fr
Application granted granted Critical
Publication of EP2103198B1 publication Critical patent/EP2103198B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/54—Plasma accelerators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03H—PRODUCING A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03H1/00—Using plasma to produce a reactive propulsive thrust
    • F03H1/0037—Electrostatic ion thrusters
    • F03H1/0062—Electrostatic ion thrusters grid-less with an applied magnetic field

Definitions

  • the invention relates to a plasma accelerator arrangement for generating a directed plasma jet.
  • Plasma accelerator arrangements are of particular importance in spacecraft drives.
  • electrothermal plasma accelerators which emit gas pulses by means of electrical discharges are known.
  • Other pulsed plasma accelerators generate an arc in a chamber penetrated by a magnetic field.
  • plasma patterns operate with magnetic acceleration of a concentrated plasma ring.
  • An important group among the plasma accelerators are the embodiments with acceleration of ions by an electrostatic field, wherein ions are generated and accelerated in an electrostatic field by ionization of a working gas in an open-ended cavity called a plasma chamber or ionization chamber.
  • Hall accelerator with annular plasma chamber and a magnetic field which extends substantially radially through the annular plasma chamber, and an electrostatic acceleration field between an anode in the plasma chamber and a cathode disposed outside the plasma chamber, which also serves as an electron source.
  • FIG. 1 Another group of plasma accelerators, in contrast to the annular geometries of the Hall accelerators, has chamber geometries with a simply connected, in particular circular, cross-sectional area in FIG a sectional plane transverse to the beam direction of the plasma jet.
  • the longitudinal axis of the plasma chamber running parallel to the beam direction in the longitudinal direction lies within the cross-sectional area.
  • the plasma jet is formed in an area around the central longitudinal axis of the chamber.
  • the cross-sectional area is typically substantially uniform in the longitudinal direction, which is why accelerators of such geometry are also referred to as cylindrical accelerators.
  • the Kaufman type accelerators at the exit of the plasma chamber have gratings spaced apart in the beam direction, between which there is an electrical voltage which accelerates ions passing through the gratings.
  • a similar geometry with a first center magnetic at the foot of a cylindrical plasma chamber and a second wall of the plasma chamber surrounding magnetic pole is made of "Plume Measurements and Miniaturazition of the Hall Thrusters with Circular Cross-sectional Discharge Chambers" of Shi rasaki and Tahara, 29 th Electric Propulsion Conf., Princeton, 2005.
  • the annular magnetic pole may be formed by soft iron magnetic shoes or by radially magnetized permanent magnet segments.
  • Yet another embodiment of a cylindrical thruster is described in DE 101 30 464 A1 and has a magnet arrangement at least two consecutive pole changes in the longitudinal direction magnetic ring arrangements surrounding the plasma chamber and / or in the region of the output of the plasma chamber a permanent magnet ring surrounding the plasma chamber with longitudinally spaced magnetic poles on.
  • the permanent magnet ring generates a special form of the magnetic field.
  • the annular chamber geometries form between the inner and outer chamber wall an annular channel, which is penetrated by a radial magnetic field through which electrons move as annular drift currents.
  • the cylindrical chamber geometries have substantially different magnetic fields and motion patterns of the electrons and ions, so typically the design features between electrostatic thrusters of different chamber geometries are not interchangeable.
  • the shape of the magnetic field is typical of the different modes of operation of the different types. It is stated in US Pat. No. 6,448,721 B2 that a potential gradient between magnetic field lines can be generated by means of intermediate electrodes and such a potential gradient can be placed close to an annular ionization zone at the anode. Furthermore, the toroid around the output should support a focusing of the plasma jet.
  • US 2,956,666 describes an electrostatic accelerator having an acceleration grid at the exit of a plasma chamber and a magnetic field extending in the beam direction.
  • GB 2 295 485 A describes an ion accelerator arrangement with an acceleration grid, which is followed by a brake grid in the beam direction. That of a plurality of elongated coils on the outside of the ionization chamber magnetic field extends in the ionization chamber of a central magnetic pole at a cathode in the direction of a plasma chamber surrounding the second magnetic pole obliquely outward.
  • US Pat. No. 5,847,493 shows a Hall plasma accelerator with a magnet arrangement which, in addition to the toroidal coils for generating the essentially radial magnetic field, has a plurality of further coils distributed through the annular chamber on the outer circumference of the chamber, by means of which the rotational symmetry of the magnetic field is specifically disturbed and the mean beam direction of the plasma jet can be influenced.
  • a short-length plasma chamber is surrounded by permanent magnets whose poles are radially spaced and which produce a cusp field in the plasma chamber. Ions are extracted from the plasma chamber by means of an electrode spanning the output of the plasma chamber.
  • GB 2 295 485 A shows a cylindrical plasma chamber containing an annular anode at the chamber wall and an acceleration grid spanning the chamber exit.
  • a magnetic field extends obliquely outwardly from an inner pole at the axis of the chamber towards the anode.
  • US Pat. No. 3,735,591 discloses an arrangement with a coil arrangement around a cylindrical anode forming the wall of a plasma chamber, producing a substantially axial magnetic field in which a central cylinder located within the plasma chamber comprises a pole piece and a ring at the exit the plasma chamber forms another pole piece.
  • a plasma accelerator is described in which in an ionization chamber an accelerated electron beam is introduced through an anode and passed through an axial magnetic field of a toroidal coil on the axis.
  • An axial electrostatic field accelerates generated ions in the direction of an exit opening of the plasma chamber.
  • An arrangement with an electron beam supplied from the anode side is also known from DE 108 28 704 A1, in which a generation of the beam-guiding magnetic field is also provided by a series of permanent magnet rings with alternating polarity.
  • US 6,448,721 shows a plasma accelerator having a cylindrical chamber geometry in which a coil arrangement generates a magnetic field leading from an inner magnetic pole at the longitudinal axis of the chamber obliquely outwards to an annular second magnetic pole. Another annular coil surrounding the chamber may be provided to reinforce radial magnetic field components. Acceleration of ions occurs electrostatically in a field between an anode at the bottom of the chamber and a cathode located laterally outside the chamber.
  • DE 101 30 464 A1 describes a plasma accelerator arrangement in which a multi-stage magnet arrangement is provided with longitudinally successive alternating pole changes, which preferably comprises permanent magnet rings with magnetic poles arranged opposite to one another in the longitudinal direction.
  • Plasma accelerators with cylindrical chamber geometry are advantageous from the transverse dimensions of the chamber.
  • the present invention has for its object to further improve such a plasma accelerator.
  • the term of a chamber geometry with a simply coherent cross-sectional area of the plasma chamber is chosen, since advantageous embodiments of the invention also include chamber geometries widening in the beam direction.
  • the simply connected cross-sectional area is preferably a circular area.
  • Single continuous planar cross-sectional areas here have an unbroken boundary line, whereas the annular cross-sectional areas of the central inner-body Hall configurations each have an inner and an outer uninterrupted boundary line.
  • the form of the electrostatic acceleration field which is disposed between a cathode located in the beam direction at or preferably after the exit of the plasma chamber and an anode disposed opposite the exit of the plasma chamber at the foot of the plasma chamber substantially parallel to the plasma chamber extending in the longitudinal direction of the central longitudinal axis of the plasma chamber.
  • a cusp structure of the magnetic field at a pole which faces away from the exit of the plasma chamber, of a magnetic ring arrangement arranged in front of the exit of the plasma chamber with magnetic poles spaced apart in the longitudinal direction.
  • an advantageous field shaping is provided at the outlet of the plasma chamber with a novel course of a characteristic area designated below as the neutral surface of a magnetic field determined by a magnetic ring arrangement, in particular a permanent magnet ring with longitudinally spaced magnetic poles.
  • such a permanent magnet ring at the outlet of the plasma chamber generates at its end pointing in the beam direction a magnetic field which is within the plasma chamber, ie radially inside the plasma chamber Magneting, closed magnetic field lines and on the outside of the plasma chamber, ie radially outside the plasma chamber and the magnet ring, closed magnetic field lines and between these two groups of magnetic field lines has a fictitious separation surface which spans the output port of the plasma chamber and in the context of the invention as neutral - Area is designated. This neutral surface strikes the magnetic pole along a line designated below as an entry line or a pole shoe arranged thereon.
  • the entry line is in rotationally symmetrical design of the magnet assembly in a plane perpendicular to the central longitudinal axis of the arrangement plane. In the case of an entry line not lying in a plane, its mean position in the longitudinal direction is assumed to be corresponding.
  • the magnetic field of a single toroid or the radial magnetic field of a Hall thruster with annular chamber geometry does not show such a neutral surface spanning the chamber exit.
  • the bulging of the neutral surface in the beam direction of the plasma jet is completely canceled.
  • the neutral surface is retracted against the beam direction against the longitudinal position of the entry line in the plasma chamber, which is hereinafter also referred to as concave course of the neutral surface in contrast to convex course in the known from DE 101 30 464 A1 arrangement.
  • the passage region of the ejected plasma jet through the neutral surface in particular the apex of a curvature of the neutral surface, typically lying on the central longitudinal axis of the plasma jet, is decisive.
  • the magnetic field shaping in the specified manner is the skilled worker with common means, in particular the use of field-shaping pole pieces, variations of the magnetic flux density in the longitudinal direction, etc. possible. Advantageous examples are described with reference to the figures.
  • the plasma chamber in the longitudinal section in front of the exit opening of the plasma chamber provides for the plasma chamber in the longitudinal section in front of the exit opening of the plasma chamber to be widened transversely to the beam direction.
  • the chamber geometry can then no longer be considered cylindrical in the strict sense.
  • leads the expansion of the plasma chamber in the region in front of the exit opening of the chamber does not lead to an expansion, but to a reduction in the divergence of the plasma jet.
  • the widening as an increase in the diameter of the plasma chamber in the longitudinal direction can be linear or non-linear.
  • the cone angle of the expansion in the case of a nonlinear course of the central expansion is at least 5 °, preferably at least 10 ° and at most 30 °, preferably at most 20 °.
  • the widening extends in the longitudinal direction advantageously only over a part of the longitudinal extent of the plasma chamber.
  • the widening in the longitudinal direction extends over at least the predominant part of the spacing of the magnet poles of the magnet ring arrangement at the exit of the plasma chamber, in particular at least over the entire distance of the magnet poles.
  • the longitudinal region of the widening of the plasma chamber can also continue counter to the beam direction via the magnetic ring stage arranged at the exit of the plasma chamber into the next magnetic ring stage in the direction of the anode.
  • the magnetic field in the plasma chamber such that in a longitudinal region between the two magnetic poles the magnetic ring arrangement arranged at the outlet of the plasma chamber, in which the longitudinal component of the magnetic field predominates over the radial component, over the chamber cross section averaged magnetic flux density decreases asymmetrically against a longitudinal mean longitudinal position.
  • the magnetic field expands vividly in the longitudinal direction. It is surprisingly found that such a widening of the magnetic field leads to a lower divergence of the ejected plasma jet.
  • the magnetic ring arrangement preferably contains a permanent magnet ring with longitudinally oppositely directed magnetic poles. Possibilities for such a design of the internal magnetic flux are familiar to the person skilled in the art and can in particular an inhomogeneous magnetization of a permanent magnetic material and / or decreasing in the beam direction cross-sectional area of a permanent magnet ring as internal properties of a permanent magnet ring, but also a magnetic shielding device on the outside of the magnetic ring arrangement and or include a magnetic shorting arrangement on the outside of the magnet assembly, each having a longitudinally varying action.
  • Fig. 3 is a counter to the beam direction vaulted course of
  • Fig. 7 shows another embodiment.
  • FIG. 1 an arrangement known from DE 101 30464 A1 is schematically sketched as a sectional image in a cutting plane containing the central longitudinal axis of the plasma chamber, wherein due to the rotational symmetry of the plasma chamber PK with the chamber wall KW and the magnet arrangement about the central longitudinal axis ML for clarity only one Half of the sectional image in the figure is drawn to the right of the central longitudinal axis.
  • the central longitudinal axis ML coincides with an indicated z-axis, which indicates the beam direction of the ejected plasma jet.
  • the plasma jet is spatially distributed around the z-axis and diverges after the exit of the plasma chamber at zA.
  • a common cathode KA is indicated, which serves as a source of primary electrons for igniting the plasma and for neutralizing the ejected plasma jet.
  • an electrostatic field which within the Plasma chamber in a known manner is substantially parallel to the z-axis.
  • the magnet arrangement arranged outside the chamber wall KW is constructed in three stages with a first magnetic ring MR1, a second magnetic ring MR2 and a third magnetic ring MR3, which surround the plasma chamber and whose magnetic poles are offset from each other in the z-direction.
  • the pole alignment of the successive magnetic rings made of permanent magnetic material is alternately set opposite, so that in each case the same poles NN, SS immediately adjacent magnetic rings facing each other, resulting in the areas between the first and second magnetic ring and between the second and third magnetic ring respectively cusp structures of the magnetic field in the chamber.
  • pole pieces P12 or P23 can be inserted between successive magnet rings.
  • the magnet rings can be magnetized in the same or different strengths.
  • the magnetic rings MR1, MR2, MR3 are substantially the same length in the longitudinal direction.
  • the length LS1 of the first magnet stage of the magnet arrangement is from the beam pointing pole N of the first magnet ring MR1 at ZE to the center of gravity of the magnetic field lines in the pole piece P12, the length LS2 of the second magnet stage from pole piece P12 to pole piece P23 and the length LS3 the third magnetic stage measured from the pole piece P23 to the anode AN.
  • the magnetic stages M1, M2, M3 are correspondingly assigned to the longitudinal areas of LS1, LS2, LS3.
  • the magnetic poles designated N and S can also be reversed.
  • the plasma chamber is circular cylindrical about the central longitudinal axis with a length LS1 + LS2 + LS3 which is greater than the diameter 2RK of the chamber.
  • the magnetic field generated with such a magnet arrangement shows magnetic fields compared to magnetic fields, z. B. with toroids around the plasma chamber and / or with a central pole in the chamber and an annular pole around the chamber and / or annular chamber geomethe and substantially radial magnetic field some peculiarities which hereinafter with particular reference to the first magnetic stage at the output of Plasma chamber are essential.
  • the magnetic field of the first magnetic stage extends within the plasma chamber in the cusp structure in the pole piece P12 with high density of the magnetic field lines predominantly transverse to the longitudinal direction z.
  • a central longitudinal region LM between the opposite poles of the first magnetic stage whose magnetic field extends predominantly parallel to the longitudinal direction z in particular in a central longitudinal region which is spaced from both ends of the first magnetic stage by about 20% of the length LS1 of the first magnetic stage.
  • the magnetic flux density typically increases in the radial direction toward the chamber wall.
  • the drawn field lines are not to be understood quantitatively.
  • the magnetic field originating from the magnetic pole N of the first magnetic ring MR1 pointing in the beam direction is partially closed by field lines designated Ml by the plasma chamber radially inside the first magnetic ring and partly by magnetic field lines designated ME outside the plasma chamber radially outside the first magnetic ring.
  • the outside closed magnetic field lines are drawn only in their approach.
  • the spatial regions of the magnetic field lines M1 and the magnetic field lines ME are separated from one another by a fictitious separation surface NF, which is referred to below as the neutral surface. This neutral surface spans the exit opening of the plasma chamber and strikes the magnetic ring along a line designated as entry line EL.
  • the neutral surface NF Due to the rotational symmetry of the arrangement is the neutral surface NF also rotationally symmetric and the entrance line forms a circular line in the plane of the magnetic pole at zE.
  • the radius of the entry line EL about the z-axis is denoted by RE.
  • the ratio WS / RE in the known arrangement is typically between 0.5 and 1.
  • the magnetic field of a ring coil commonly used in the prior art does not show such a neutral area spanning the chamber exit.
  • a first embodiment of the invention is sketched, in which the bulge of the neutral surface NF denoted by WS in beam direction z is considerably reduced with respect to the plane of the entry line EL of this neutral surface into the magnet arrangement with respect to the field sketched in FIG. It turns out that with such a reduced bulge, which can be continued to a substantially even neutral surface or even to a counter to the beam direction concave curved neutral surface continues, in conjunction with the magnetic field in the output at the magnetic stage a significantly reduced divergence of the ejected plasma jet, without giving up the advantages of the magnetic field arrangement known from the prior art according to FIG.
  • the magnetic field in the magnetic stage in front of the outlet is characterized in particular by two magnetic poles N and S annularly surrounding the plasma chamber PK and spaced apart from each other in the longitudinal direction z, which are preferably provided by a magnet Longitudinal z magnetized ring magnet body MR1 are formed.
  • the magnetic field within the chamber extends in a central region predominantly parallel to the longitudinal direction and extends in the region between the first and the second magnetic stage M1, M2 in the region of the pole piece P12 substantially radially.
  • the magnetic field between the first magnet stage with magnet ring arrangement MR1 and the second magnet stage with magnet ring arrangement MR2 forms a cusp structure CS, as known per se from the prior art.
  • the field lines are deflected away from the longitudinal axis parallel to the longitudinal axis ML away from the center and extend in the sketched embodiment with the pole piece on this to substantially radially.
  • the ratio of the size WS in the z-direction to the diameter 2RE of the entry line EL is advantageously at most 0.1.
  • the value for WS should be regarded as negative, so that regardless of the amount of the concave concavity, the aforementioned relation WS / 2RE ⁇ 0.1 always applies.
  • a further contribution to reducing the bulge WS of the neutral surface NF can be done by dimensioning the magnetic stage at the outlet of the plasma chamber in such a way that the distance of the magnetic poles or when using pole pieces, the distance of the corresponding longitudinal positions on the pole pieces as the length LS1 of the magnetic stage Differing from the state of the art according to FIG. 1, larger than the diameter of the plasma chamber, preferably greater than 1, 5 times the diameter of the plasma chamber is selected.
  • FIG. 4 shows a further measure for the advantageous shaping of the magnetic field, in particular in a central longitudinal region LD between longitudinal positions Z1 and Z2.
  • a pole piece PSA is arranged in FIG. 4 at the pole N of the magnetic ring arrangement MT1 pointing in the beam direction.
  • the magnetic field between the longitudinally spaced opposite magnetic poles of the magnetic ring arrangement at the outlet of the plasma chamber in the central longitudinal region LD for which preferably a longitudinal region at a distance of about 20% of the length of the magnetic stage of the two Magnet poles is considered, in the direction Z1 widening in the longitudinal direction in the longitudinal direction in the sense that the corresponding FeId- lines in the field region F1 relative to the center of the magnetic stage M1 in the longitudinal direction symmetrically to F1 lying field region F2 radially further outward and
  • the magnetic flux density and the total magnetic flux at least in a predominant radial region of the diameter of the plasma chamber about the central longitudinal axis ML in Strahlrich- decrease weight. It turns out that such a divergence of the magnetic field lines in such a central longitudinal region surprisingly leads to a reduced divergence of the ejected plasma jet.
  • FIG. 5 an arrangement is sketched, which in a central longitudinal region LD has a comparable to Fig. 4 field profile.
  • a magnetic shield AM z. B. in the form of a soft magnetic material attached, the shielding effect, z. B. by increasing radial thickness, increases in the beam direction z.
  • the longitudinally varying shielding exhibits a similar effect to the decreasing radial thickness of the magnetic ring MT1 according to FIG. 4.
  • the geometry of the permanent magnet ring according to FIG. 3 and the magnetic shielding according to FIG. 5 can be implemented particularly advantageously together.
  • Fig. 6 shows an arrangement with expanding geometry of the plasma chamber.
  • the chamber wall KW is assumed to be cylindrical in an anode-assigning section as in FIG.
  • the radial expansion RM - RC is advantageously in the range between 5% and 75% of RM. It can be seen that the widening of the plasma chamber via a magnetic field M1 at the output of the plasma chamber, in particular at the output of the plasma chamber, contributes to reducing the divergence of the ejected plasma jet.
  • the expansion of the plasma chamber does not necessarily extend over the full length of the magnetic stage M1 at the output of the plasma chamber, but may also continue in the direction of the anode in the magnetic stage M2.
  • the plasma chamber is made substantially cylindrical.
  • a magnetic ring arrangement MS1 in the magnetic stage at the exit of the plasma chamber is embodied in the example sketched in FIG. 6 as a sequence of magnetic rings with an inner diameter progressing in the longitudinal direction.
  • Such a magnet arrangement can advantageously contribute to the effect of the widening field between the longitudinally-spaced end poles of the magnetic ring arrangement MS1 between regions F2 and F1 as described with reference to FIG. 4.
  • a pole piece PSA is again provided on the terminal pole of the magnetic ring arrangement MS1 pointing in the beam direction.
  • a magnet assembly MV1 in which in conjunction with a widening of the chamber wall, a magnet assembly MV1 is provided, which has a decrease in the magnetic flux within the magnet assembly in the longitudinal direction z in the lying at the output of the plasma chamber magnetic stage.
  • a plurality of magnet rings are arranged sequentially in the z-direction. are net, but which have different, in the z-direction gradually decreasing radial wall thicknesses.
  • the effect of the radial widening of the magnetic field in the central longitudinal region described with reference to FIG. 5 is further enhanced here, and the neutral surface NF shows the concave concavity, as described with respect to FIG. 2, against the jet direction.
  • a smoothed or continuous course of the inner and / or outer wall surfaces of these magnetic ring arrangements can also be provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Plasma Technology (AREA)

Abstract

L'invention concerne un dispositif accélérateur de plasma, à accélération électrostatique des ions à travers un champ électrostatique traversant une chambre de plasma sensiblement parallèlement à la direction du rayonnement, pour une géométrie de plasma du type cylindrique, à surfaces transversales de préférence circulaires, dispositif dans lequel différentes mesures sont prises en vue de réduire la divergence du jet de plasma émis, mesures qui sont réalisables soit individuellement, soit de préférence en combinaison.
EP07846645.5A 2006-12-15 2007-11-17 Dispositif accelerateur de plasma Active EP2103198B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610059264 DE102006059264A1 (de) 2006-12-15 2006-12-15 Plasmabeschleunigeranordnung
PCT/EP2007/009952 WO2008071287A1 (fr) 2006-12-15 2007-11-17 Dispositif accélérateur de plasma

Publications (2)

Publication Number Publication Date
EP2103198A1 true EP2103198A1 (fr) 2009-09-23
EP2103198B1 EP2103198B1 (fr) 2015-10-21

Family

ID=39135350

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07846645.5A Active EP2103198B1 (fr) 2006-12-15 2007-11-17 Dispositif accelerateur de plasma

Country Status (3)

Country Link
EP (1) EP2103198B1 (fr)
DE (1) DE102006059264A1 (fr)
WO (1) WO2008071287A1 (fr)

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EP3379080A1 (fr) * 2017-03-20 2018-09-26 Airbus Defence and Space GmbH Propulseur à champ cuspidé

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DE102016206039A1 (de) 2016-04-12 2017-10-12 Airbus Ds Gmbh Entladungskammer eines Ionenantriebs, Ionenantrieb mit einer Entladungskammer und eine Blende zur Anbringung in einer Entladungskammer eines Ionenantriebs

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EP3379080A1 (fr) * 2017-03-20 2018-09-26 Airbus Defence and Space GmbH Propulseur à champ cuspidé
US10184460B2 (en) 2017-03-20 2019-01-22 Airbus Defence and Space GmbH Cusped-field thruster

Also Published As

Publication number Publication date
WO2008071287A1 (fr) 2008-06-19
DE102006059264A1 (de) 2008-06-19
EP2103198B1 (fr) 2015-10-21

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