Author: Jerrell Maurice Turner
Publisher:
ISBN:
Category : Space vehicles
Languages : en
Pages : 63
Book Description
An experimental program established that a multiple needed colloid thruster produces a beam with anisotropic current, specific charge, and mass flow distributions as a function of beam half-angle. Data reduction and analysis indicated that the assumptions of beam isotropy yields valid relative performance but the absolute value of performance determined from the time-of-flight spectrometer is questionable. A segmented time-of-flight collector, consisting of ten electrically isolated rings which could be connected to simulate a total collector, was the primary diagnostic tool. For thrust, specific impulse, and efficiency, results from the segmented and total collector differed by up to 30%. Even larger differences were observed in the case of mass flow. By moving the collector, it was found that the distance between the source and time-of-flight collector has a significant effect on specific charge and current. (Author).
Specific Charge and Mass Flow Distribution in a Colloid Beam
Author: Jerrell Maurice Turner
Publisher:
ISBN:
Category : Space vehicles
Languages : en
Pages : 63
Book Description
An experimental program established that a multiple needed colloid thruster produces a beam with anisotropic current, specific charge, and mass flow distributions as a function of beam half-angle. Data reduction and analysis indicated that the assumptions of beam isotropy yields valid relative performance but the absolute value of performance determined from the time-of-flight spectrometer is questionable. A segmented time-of-flight collector, consisting of ten electrically isolated rings which could be connected to simulate a total collector, was the primary diagnostic tool. For thrust, specific impulse, and efficiency, results from the segmented and total collector differed by up to 30%. Even larger differences were observed in the case of mass flow. By moving the collector, it was found that the distance between the source and time-of-flight collector has a significant effect on specific charge and current. (Author).
Publisher:
ISBN:
Category : Space vehicles
Languages : en
Pages : 63
Book Description
An experimental program established that a multiple needed colloid thruster produces a beam with anisotropic current, specific charge, and mass flow distributions as a function of beam half-angle. Data reduction and analysis indicated that the assumptions of beam isotropy yields valid relative performance but the absolute value of performance determined from the time-of-flight spectrometer is questionable. A segmented time-of-flight collector, consisting of ten electrically isolated rings which could be connected to simulate a total collector, was the primary diagnostic tool. For thrust, specific impulse, and efficiency, results from the segmented and total collector differed by up to 30%. Even larger differences were observed in the case of mass flow. By moving the collector, it was found that the distance between the source and time-of-flight collector has a significant effect on specific charge and current. (Author).
Diagnostics of Low-spacific-charge Colloid Ion Beam
Author: Jack W. Geis
Publisher:
ISBN:
Category :
Languages : en
Pages : 88
Book Description
As part of an in-house colloid diagnostic program, the first detailed mapping of propellant mass flow distribution from a colloid source was completed, and the program has shown the influence of anisotropic or non-uniform flow conditions within the beam on the efficiency of source operation. The operating conditions of high propellant feed pressure, low voltage, and high resistivity of the sodium iodide/glycerol propellant, which created a very low specific charge beam, caused a nonuniform distribution of specific charge and beam current as function of beam divergence half angle. The assumption of uniform beam conditions would result in a 12% error in computing thrust and a 25% error in determining overall efficiency.
Publisher:
ISBN:
Category :
Languages : en
Pages : 88
Book Description
As part of an in-house colloid diagnostic program, the first detailed mapping of propellant mass flow distribution from a colloid source was completed, and the program has shown the influence of anisotropic or non-uniform flow conditions within the beam on the efficiency of source operation. The operating conditions of high propellant feed pressure, low voltage, and high resistivity of the sodium iodide/glycerol propellant, which created a very low specific charge beam, caused a nonuniform distribution of specific charge and beam current as function of beam divergence half angle. The assumption of uniform beam conditions would result in a 12% error in computing thrust and a 25% error in determining overall efficiency.
Colloid Thrustor Beam Analysis
Author: Carl T. Norgren
Publisher:
ISBN:
Category : Electrostatic accelerators
Languages : en
Pages : 52
Book Description
Publisher:
ISBN:
Category : Electrostatic accelerators
Languages : en
Pages : 52
Book Description
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 376
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 376
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
U.S. Government Research & Development Reports
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 784
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 784
Book Description
International Aerospace Abstracts
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1078
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1078
Book Description
Nuclear Science Abstracts
Author:
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 934
Book Description
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 934
Book Description
Cold Cathodes II
Author: M. Cahay
Publisher: The Electrochemical Society
ISBN: 9781566773423
Category : Technology & Engineering
Languages : en
Pages : 432
Book Description
Publisher: The Electrochemical Society
ISBN: 9781566773423
Category : Technology & Engineering
Languages : en
Pages : 432
Book Description
NASA Technical Note
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 372
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 372
Book Description
U. S. Government Research and Development Reports
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1340
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1340
Book Description