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SUMMER INTERSHIP

SUMMER INTERSHIP . Electronics CERN BE-BI-BL. T opic : photo- multiplier’s dynamic range improovements. contextualization. 1 ms 1 – 10 mA. Problematic. avalanche effect. L inear mode . S aturation mode. W hy saturation?. Test Box. First results. SIMULATIONS. EXPERMIMENTS.

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SUMMER INTERSHIP

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  1. SUMMER INTERSHIP Electronics CERN BE-BI-BL Topic: photo-multiplier’sdynamic range improovements

  2. contextualization • 1 ms • 1 – 10 mA

  3. Problematic avalancheeffect Linear mode Saturation mode

  4. Why saturation?

  5. Test Box

  6. First results SIMULATIONS EXPERMIMENTS Actual system - Saturations ≠dynamic ranges btw PM • Actualsystem : - loading time ≈ 30 ms - Needed Capa on the last stage ≈ 10 mF (Hugeand not possible) First qualitative experimentwith the box V config 1  linear tension devideur V config 2  curved tension devider

  7. NextWeeks • Define more preciselywhendoes the saturation mode begins • Runmesurementswithseveral types of electronics • Write the usersnotice of the testing box in english

  8. Main Objectiv Design and suggest a new electronic socket to improove the dynamic range on photo-multiplayersand avoid saturation and unlinearsignals in beamprofiling

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