2 edition of Functional testing of the space station plasma contactor found in the catalog.
Functional testing of the space station plasma contactor
by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC], [Springfield, Va
Written in English
|Statement||Michael J. Patterson ... [et al.].|
|Series||NASA technical memorandum -- 106841.|
|Contributions||Patterson, Michael J., 1955-, United States. National Aeronautics and Space Administration.|
|The Physical Object|
The International Space Station (ISS) is a modular space station (habitable artificial satellite) in low Earth ISS programme is a multi-national collaborative project between five participating space agencies: NASA (United States), Roscosmos (Russia), JAXA (Japan), ESA (Europe), and CSA (Canada). The ownership and use of the space station is established by intergovernmental treaties COSPAR ID: A. Technology Readiness of the NEXT Ion Propulsion System. NEXT gimbal during functional testing with the PM thruster. development for the Interna tional Space Station Plasma.
Start studying HVACR Basic Electrical-Contactors/ RelaysTest#2. Learn vocabulary, terms, and more with flashcards, games, and other study tools. 1. Introduction. As a special plasma source, a plasma contactor is capable of actively collecting electrons or ions by coupling charged beams of particles emitted due to the potential difference (or bias voltage) between a spacecraft's surface and the environmental plasma [1,2].As a result of the physical process outline above, plasma contactors have a series of applications in space Author: Qimeng Xia, Kan Xie, Ningfei Wang.
Orbital replacement units (or on-orbit replaceable unit) (ORUs) are key elements of the International Space Station that can be readily replaced when the unit either passes its design life or fails. ORUs are parts of the main systems and subsystems of the external elements of the ISS. The ProSEDS (Propulsive Small Expendable Deployer System) is a tether-based propulsion experiment that draws power from the space environment around Earth, allowing the transfer of energy from the Earth to the spacecraft.. Inexpensive and reusable, ProSEDS technology has the potential to turn orbiting, in-space tethers into "space tugboats" -- replacing heavy, costly, traditional chemical.
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FUNCTIONAL TESTING OF THE SPACE STATION PLASMA CONTACTOR facility, fabricated of aluminum, is m in diameter and m long. The pumping train includes a two-stage blower system backed up by a roughing pump.
The chamber is equipped with four m diameter helium refrigerator cryopumps which together provide a xenonFile Size: 1MB. A plasma contactor system has been baselined for the International Space Station Alpha (ISSA) to control the electrical potentials of surfaces to Skip to main content This banner text can have markup.
functional testing of the space station plasma contactor do so at a potential difference of space plasma potential) at all emission.
International Space Station (ISS) Plasma Contactor Unit (PCU) Utilization Plan Assessment Update [Hernandez-Pellerano, Amri] on *FREE* shipping on qualifying offers.
International Space Station (ISS) Plasma Contactor Unit (PCU) Utilization Plan Assessment UpdateAuthor: Amri Hernandez-Pellerano. The system represents a dual-use technology which is a direct outgrowth of the NASA electric propulsion program and, in particular, the technology development effort on ion thruster systems.
The plasma contactor subsystems include a hollow cathode assembly, a power electronics unit, and an expellant management unit. Plasma contactors have been baselined for the Space Station (SS) to control the electrical potentials of surfaces to eliminate/mitigate damaging interactions with the space environment.
The system represents a dual-use technology which is a direct outgrowth of the NASA electric propulsion program and. Ignition testing of hollow cathode assemblies being developed for the Space Station plasma contactor system has been initiated to validate reliable multiple restart capability.
An ignition approach was implemented that. Cleveland, Ohio The Plasma Contactor Unit (PCU) was developed by the Rocketdyne division of The Boeing Company to control charging of the International Space Station (ISS).
Each PCU contains a Hollow Cathode Assembly (HCA), which emits the charge control by: 8. International Space Station plasma contactor. This work has been performed at the NASA Glenn Research Center in the On-board Propulsion Branch.
This paper discusses the early development tests of the ISS hollow cathode assemblies (HCA), extended duration life tests and repetitive ignition tests File Size: KB. Plasma contactor technology is widely used on board spacecraft to keep spacecraft charging levels under control.
On the International Space Station, for instance, it is used to prevent high. Get this from a library. Functional testing of the space station plasma contactor. [Michael J Patterson; United States. National Aeronautics and Space Administration.;]. Abstract. The International Space Station (ISS) regularly passes through the southern auroral oval south of Australia.
The ISS has two plasma contactors that emit the electron currents needed to balance electron collection by surfaces such as the lattice of bare rods on the solar array masts. These electron currents exceed A at by: 2. Figure 1 illustrates the current path enabled through a plasma contactor. The plasma contactor unit (PCU) consists of a hollow cathode assembly (HCA), power electronics unit (PEU), and gas feed system (GFS).
The entire unit is contained within an avionics. Plasma contactors are devices used on spacecraft in order to prevent accumulation of electrostatic charge through the expulsion of plasma (often Xenon).
An electrical contactor is an electrically controlled switch which closes a power or high voltage electrical circuit. An experimental investigation has been undertaken to determine the effects associated with operating the International Space Station (ISS) without a Plasma Contactor Unit (PCU).
Two plasma contactor units have been placed on the International Space Station to provide a “ground wire” to prevent arc discharging.
These devices emit a low-energy stream of electrons during spacewalks that reduces the buildup of electrical charge. 13 As long as the plasma contactor units are functional, an astronaut floating freely. If this Test Report Form is used by non-IECEE members, the IECEE/IEC logo and the reference to the CB Scheme procedure shall be removed.
This report is not valid as a CB Test Report unless signed by an approved CB Testing Laboratory and appended to a CB Test Certificate issued by an NCB in accordance with IECEE File Size: KB.
John Hamley, Michael Patterson. Integration testing of the Space Station Plasma contactor power electronics unit.
30th Joint Propulsion Conference and by: et al., ). The ISS provides an ideal platform for long‑term space environment effects testing, particularly as experiments can be returned to Earth for postflight analyses.
The Materials International Space Station Experiment (MISSE) is a series of materials flight experiments, the first two of which were delivered to the ISS Figure 2. Two plasma contactor units have been placed on the International Space Station to provide a “ground wire” to prevent arc discharging.
These devices emit a low-energy stream of electrons during spacewalks that reduces the buildup of electrical charge. 13 As long as the plasma contactor units are functional, an astronaut floating freely Cited by:. Simulation of the low Earth orbit (LEO) plasma environment in ground-based vacuum facilities is important for studies of spacecraft interaction with ionospheric plasmas.
In this paper we describe the design and performance of a magnetic filter-equipped plasma source.29 - Isolating Contactor 30 - Annunciator Relay 32 - Directional Power Relay 36 - Polarity or Polarizing Voltage Devices 37 - Undercurrent or Underpower Relay 38 - Bearing Protective Device 39 - Mechanical Conduction Monitor 40 – Loss of Field Relay 41 - Field Circuit Breaker 42 - Running Circuit Breaker 43 - Manual Transfer or Selector Device.Get this from a library!
A review of testing of hollow cathodes for the International Space Station plasma contactor. [Scott D Kovaleski; NASA Glenn Research Center.;].