quantity | symbol | value |
number of detectors | 64 huts | |
recorded muon rate per detector | 37.5 mu sec-1 det-1 | |
total observed muon rate | 2400 mu sec-1 | |
instantaneous data rate | Rreadin | 600 MHz |
muon event fraction | ~ 75% | |
muon detection threshold | 0.1 GeV** | |
single cell; width, height | w,h | 14 mm, 10 mm |
vert. spacing between planes | H | 200 mm |
total number of wires | N*W | 40,960 |
single detector area | 1.29 m2 | |
total 64 detector area | 83 m2 | |
total area of GRAND | 10,000 m2 |
**Sensitive to vertical muons with
E > 0.1 GeV at GRAND; to survive in-flight decay and ionization energy
loss, cosmogenic muons must
originate with > 2 GeV
back to GRAND homepage
bdf,jp / mar, 1998