SUMMER INTERSHIP

ElectronicsCERN

BE-BI-BL

Topic: photo-multiplier’s dynamic range improovements

contextualization

- 1 ms - 1 – 10 mA

Problematic

Linear mode Saturation mode

avalanche effect

Why saturation?

Test Box

First results SIMULATIONS• Actual system :

- loading time ≈ 30 ms- Needed Capa on the

last stage ≈ 10 mF (Huge and not possible)

EXPERMIMENTS• Actual system

- Saturations- ≠dynamic ranges btw

PM

First qualitative experiment with the box

V config 1 linear tension devideurV config 2 curved tension devider

Next Weeks

• Define more precisely when does the saturation mode begins • Run mesurements with several

types of electronics • Write the users notice of the

testing box in english

Main Objectiv

Design and suggest a new electronic socket to improove the dynamic range on photo-

multiplayers and avoid saturation and unlinear signals in beam profiling