Accession Number:

AD0699280

Title:

FURTHER INVESTIGATIONS ON LOW DENSITY HALL ACCELERATORS,

Descriptive Note:

Corporate Author:

DEUTSCHE VERSUCHSANSTALT FUER LUFT- UND RAUMFAHRT E V STUTTGART (WEST GERMANY)

Report Date:

1969-01-01

Pagination or Media Count:

12.0

Abstract:

The Hall-Ion-Thrustor is well suited for the power range of 0.5 ... 10 kW. Interesting applications for this thrustor type are the use for a Van-Allen-probe and for orbit-to-orbit transfer. Based on theoretical considerations, the dependance of the thrustor efficiency on the magnetic field and on the length of the accelerator channel has been calculated. To reduce the anomalous electron back-flow, an external ion source should be used, which produces a homogenious ion beam. This can be obtained by an annular plasma source with a slit hollow cathode. Experiments have been carried out on two different accelerator types. HIT III has been operated with a power input of about 5 kW, a ratio of thurst to power of 25 mNkW at a velocity of the argon plasma of 35 kms. This means an electric efficiency of almost 50. HIT IV has been operated with a power input up to 8 kW. At lower power levels the thrust to power ratio is about 30 ... 35 mNkW at an exhaust velocity of some 25 ... 30 kmsec. Author

Subject Categories:

  • Electric and Ion Propulsion

Distribution Statement:

APPROVED FOR PUBLIC RELEASE