NASA Logo, National Aeronautics and Space Administration
NASA Space Science Data Coordinated Archive Header

Wave and Plasma Analyzer (APV-N)

NSSDCA ID: 1984-125A-10

Mission Name: Vega 1
Principal Investigator:Dr. Jaroslav Vojta

Description

This experiment (APV-N) was designed to study (1) the mechanism of anomalously high ionization of cometary gas, (2) the shock-front structure, and (3) the phenomena in the region of the contact surface (ionopause). The analyzer had a frequency range of 0.1 to 1000 Hz, and was designed to monitor waves excited in the cometary environment, in particular the lower hybrid waves (10 Hz) and ion cyclotron waves (1 Hz). A twin-probe technique was used to measure the potential difference between two probes placed on the 5-m boom isolated from the spacecraft. The plasma flow fluctuations were measured with a Faraday cup at the boom's tip.

Alternate Names

  • APV-N
  • Vega1/APV-N

Facts in Brief

Mass: 5 kg
Power (avg): 8 W
Bit rate (avg): 2.048 kbps

Disciplines

  • Planetary Science: Small Bodies
  • Planetary Science: Fields and Particles
  • Space Physics: Heliospheric Studies

Additional Information

Questions and comments about this experiment can be directed to: Dr. David R. Williams

 

Personnel

NameRoleOriginal AffiliationE-mail
Dr. Stanislav I. KlimovCo-InvestigatorSoviet Academy of Sciences
Dr. Z. KravczykCo-InvestigatorPolish Academy of Sciences
Dr. Jaroslav VojtaPrincipal InvestigatorAcademy of Sciences of the Czech Republicjvo@ufa.cas.cz
[USA.gov] NASA Logo - nasa.gov