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SUMMER INTERSHIP

This summer internship at CERN's BE-BI-BL department focuses on improving the dynamic range of photo-multipliers (PMs) to enhance beam profiling accuracy. It addresses the challenges of avalanche effects, saturation modes, and their impact on linear performance. Initial experiments with a test box reveal the limitations of current configurations, particularly the long loading times and large capacitance requirements. Future work will include defining saturation points, conducting electronics measurements, and drafting a user notice for the testing box. The primary goal is to design an innovative electronic socket to reduce saturation and optimize signal linearity.

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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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