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λ a [m]
105
100
95
90
85
80
75
OMs 11,12,27,33,71
90% C.L.
λ e = (23.9±0.6) m
λ a = (88.8±3.2) m
ρ = 0.79
99.99% C.L.
χ 2
min /NDF = 268/228
70
20 21 22 23 24 25 26 27 28
λe [m]
Figure 29: Contour plot of the value yielded by comparing data time distributions with their simulated counterparts
varying the parameters ¡£¢ and ¡¥¤§¦¨¦ .
The dependence of ¢ on wavelength can be useful for other purposes though (simulation, computation
of energy loss by Cherenkov emission) and is shown in the curve in Fig. 32, taken from
[65].
Distance(m)*count rate(/256Hz)
10 5
10 4
1000
100
350nm-1950mA
350nm-1480mA
350nm-1200mA
1σ
0 50 100 150 200 250
Distance (m)
Figure 30: Distance © counting rate versus distance for DC lamp source emitting 350 nm photons. The datapoints
are well fitted by an exponential, as expected from Eq. 53
42