Welcome to the MASS Homepage
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 5,
The instrument is composed by a a magnetic spectrometer, time-of-flight
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 a
of 9855 s.
The Matter Antimatter Superconducting Spectrometer, MASS91 was flown
from Fort Sumner, New Mexico on 23 September 1991.
The payload took data for 9.8 hours at a float altitude with a mean
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