Development of the Top Hat Electric Propulsion Plume Analyzer (TOPAZ)

Victor, Allen L.; Zurbuchen, T. H.; Gallimore, Alec D.

doi:10.2514/6.2004-4099

Cited by 3 publications

(3 citation statements)

References 11 publications

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“…Droplet time of flight is a way to determine values for many characteristics of charged electrospray beams [60]. The spectrometers utilize the principle that particles of different masses with the same energy E part travel with different velocities inversely proportional to the square root of the mass [61].…”

Section: Time Of Flight Algorithmmentioning

confidence: 99%

Simulation of Charge and Mass Distributions of Indium Droplets Created by Field Emission

Vanderwyst

Christlieb

Sussman

et al. 2006

37th AIAA Plasmadynamics and Lasers Conference

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Field emission electric propulsion (FEEP) thrusters are useful as µN, µ-radian attitude control devices for satellites. In this study, we simulate in axisymmetric 2D coordinates the emission of charged indium leaving the surface and forming unique droplets. The boundary element method is used to rapidly and accurately calculate the electric field on the fluid surface, which is then advected forward in time using the combined level set and volume of fluid (CLSVOF) method. The probability density function (PDF) of droplet charge to mass ratio is simulated. Each drop influences the size, charge and path of the following new drop.

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Section: Time Of Flight Algorithmmentioning

confidence: 99%

Simulation of Charge and Mass Distributions of Indium Droplets Created by Field Emission

Vanderwyst

Christlieb

Sussman

et al. 2006

37th AIAA Plasmadynamics and Lasers Conference

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“…The method of the design and characterization of TOPAZ is discussed in further detail in a previous article. 16…”

Section: Analyzer Design Through Simionmentioning

confidence: 99%

The Top Hat Electric Propulsion Plume Analyzer (TOPAZ): Preliminary Data on the BHT600 Cluster

Victor¹,

Zurbuchen²,

Gallimore³

2005

41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference &Amp;amp; Exhibit

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“…The method of the design and characterization of the electrostatics and time-of-flight of TOPAZ is discussed in further detail in previous articles. 16,19 The biased and grounded plates in TOPAZ are made of Aluminum 6061-T6. High-temperature Machinable Glass Mica insulators are used to position the aluminum plates of TOPAZ in the correct position.…”

Section: Time-of-flight Mass Spectroscopymentioning

confidence: 99%

Far-Field Species Distribution Measurements on the BHT-600 Hall Thruster Cluster

Victor¹,

Gallimore²,

Zurbuchen³

2007

43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference &Amp;amp; Exhibit

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Measurements via the Top Hat Electric Propulsion Plume Analyzer (TOPAZ) on theBusek BHT-600 Hall thruster cluster are presented. TOPAZ incorporates a 'top hat' design with an analyzer constant of 100 resulting in a wide energy-range capability and high angular and energy resolutions. A time-of-flight analyzer is also incorporated for mass-tocharge (and hence charge-state) discrimination from within the plume. Energy profiles measured from different regions of the cluster revealed lower-energy (i.e., energies significantly below the discharge voltage) ions emanating from positions closer to the cathode, while higher-energy (i.e., energies near or higher than the discharge voltage) ions were measured along the discharge channel centerlines. Low-energy ions were also measured from behind the cathodes only during cluster operation indicating a possible cross-pollination of the cathode plume with the opposite thruster. Multiply-charged xenon ions (i.e., Xe 3+ and Xe 4+) were measured for 0° and 10° plume angles while the 20° plume angle revealed mostly singly-and doubly-charged xenon. Calculations of the axial and radial velocity distributions for the first three charge-states downstream of the cluster centerline revealed a symmetric triple-peak structure in the radial velocity distributions and a doublepeak profile in the axial velocity distribution of the first charge-state of xenon. I. Nomenclature= deflection plate gap radius R 2 = grounded plate gap radius R 3 = top hat radius R C = gap centerline radius R G = guiding plate radius R P = particle radius of motion S = aperture radius= time-of-flight distance m = particle mass q = charge of particle t TOF = particle time-of-flight v = velocity ∆R = gap distance ∆x = distance between exit of gap and particle detector α = elevation angle β = azimuthal angle of incoming particles 1 Former Graduate Student, Department of Aerospace Engineering, allen.victor@gmail.com.

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Development of the Top Hat Electric Propulsion Plume Analyzer (TOPAZ)

Cited by 3 publications

References 11 publications

Simulation of Charge and Mass Distributions of Indium Droplets Created by Field Emission

Simulation of Charge and Mass Distributions of Indium Droplets Created by Field Emission

The Top Hat Electric Propulsion Plume Analyzer (TOPAZ): Preliminary Data on the BHT600 Cluster

Far-Field Species Distribution Measurements on the BHT-600 Hall Thruster Cluster

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