Welcome to the MASS
Movie of a balloon
The MASS balloon and gondola just before launch.
The Matter Antimatter Superconducting Spectrometer, MASS89,
flown from Prince Albert, Saskatchewan (Canada) on September
The instrument is composed by a a magnetic spectrometer,
counter, imaging calorimeter and a gas Cherenkov counter. The
reached a float altitude of about 36 km after an ascent that lasted
3h. The data sample included more than 360 000 events, gathered over
of 9855 s.
The Matter Antimatter Superconducting Spectrometer, MASS91 was
from Fort Sumner, New Mexico on 23 September 1991.
The payload took data for 9.8 hours at a float altitude with a
atmosphere of 5.8 g/cm2. The antiproton flux was measured between
of 3.7 and 24.1 GeV
Schematic view of the MASS89 (left) and MASS91
last update 20/7/03