Purpose of the flight and payload description

The apparatus, uses magnetic-core digital spark chambers to determine the trajectories of charged particles through the instrument, before and after they pass the gap of a permanent magnet. The direction and magnitude of the magnetic deflection provides the sign and rigidity of each particle traversing the detector. The spark chambers are triggered by a counter telescope consisting of a directional gas Cerenkov counter and two plastic scintillation counters. In addition, two anti-coincidence scintillation counters are used to veto events in which a particle fails to pass through the magnet gap.

Details of the balloon flight

Balloon launched on: 7/15/1974 at 18:30 cst
Launch site: Fort Churchill Airport, Manitoba, Canada  
Balloon launched by: Raven Industries Inc.
Balloon manufacturer/size/composition: Zero Pressure Balloon Winzen 30.500.000 cuft (Natural Shape - 0.6 mil. Stratofilm + 2 0.7 mil. Caps)
End of flight (L for landing time, W for last contact, otherwise termination time): 7/16/1974 at ~ 14:00 cst
Balloon flight duration (F: time at float only, otherwise total flight time in d:days / h:hours or m:minutes - ): 20 h 10 m

External references

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