Etude de bruit de fond induit par les muons dans l'expérience ...

tel-00724955, version 1 - 23 Aug 2012
4
92 Muon detection
∆TDC (per TDC-ch)
? ∆TDC TDC ? TDCneighbor
(per TDC-ch) ? TDC ? TDC neighbor
∆TDC neighbor (per TDC-ch)
? TDC
horizontal modules
? TDC
∆TDC (per TDC-ch)
vertical modules along
short side
? TDC
∆TDC (per TDC-ch)
vertical modules along
long side
? TDC
∆TDC (per TDC-ch)
counts per TDC-ch
counts per TDC-ch
counts per TDC-ch
horizontal modules
Projection
vertical modules along short side
Projection
vertical modules along long side
Projection
Figure 4.6: Left: Biplot of the time difference within the neighboring module n + 1
versus the time difference within module n of a level, further in coincidence with
the other level of the veto system. Right: Projection of these biplots. On top are
represented the Top modules, in the center the vertical modules along their shorter
side (North and South of the upper level), and on bottom the vertical modules along
their longer side (North and South of the lower level, and East and NEMO).