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Studio di fotodiodi a valanga per il calorimetro CMS al LHC del CERN"

Studio di fotodiodi a valanga per il calorimetro CMS al LHC del CERN"

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(a) (b) (c) (d) (e) (f) (g)<br />

Figura 3.2: Congurazione degli apparecchi <strong>per</strong> la misura <strong>del</strong>l'ecienza quantica.<br />

(a) Lampada <strong>al</strong>lo Xenon<br />

(b) Fibra ottica<br />

(c) Chop<strong>per</strong><br />

(d) Monocromatore<br />

(e) Lenti<br />

(f) Diaframma ottico<br />

(g) Supporto <strong>del</strong>l'APD<br />

+<br />

V bias<br />

ORTEC<br />

142B<br />

ORTEC<br />

474<br />

Lecroy<br />

2249 w<br />

CSP<br />

Sha<strong>per</strong><br />

Amplifier<br />

A<br />

D<br />

C<br />

Computer<br />

LED<br />

APD<br />

Figura 3.3: Schema <strong>del</strong>la congurazione elettronica ut<strong>il</strong>izzata <strong>per</strong> la misura <strong>di</strong> F.<br />

57

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