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

tel-00724955, version 1 - 23 Aug 2012
5.4 Coincidences between the muon veto and the bolometers 115
Q = ΣE I / ΣE R
Q = ΣE I / ΣE R
events in [+15,+35] ms
ΣE R ≥ 250 keV
ΣE R (keV)
events in [+15,+35] ms
ΣE R ≥ 250 keV
ΣE R (keV)
Q = ΣE I / ΣE R
events in [+15,+35] ms
ΣE R ≥ 250 keV
multi bolo
events in [+15,+35] ms
ΣE R ≥ 250 keV
ΣE R (keV)
Figure 5.16: Q-plots of events in coincidence with ER ≥ 250 keV inside the coincidence
time interval ∆tcoinc ∈ [+15, +35] ms on the full energy scale (top left),
for ER < 1350 keV (bottom left) and for ER < 4 MeV. The pink line is plotted as
a reference at ER > 30 keV, this is not a threshold applied in this analysis. The
bolometer multiplicity of the coincidence is shown in the top right figure. In the
Q-plot this information is translated as: Coincidence with multibolo = 1 are plotted
as full circles, with multibolo > 1 are full rectangles. The individual bolometer from
an event with multibolo > 1 are plotted in open triangles.
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