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Thesis

Characterisation of a Raspberry Pi NoIR v2 camera module for monitoring the beam shape and position of a 2 kW laser in the CSR system

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Di Marco,  Daniel
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Citation

Di Marco, D. (2024). Characterisation of a Raspberry Pi NoIR v2 camera module for monitoring the beam shape and position of a 2 kW laser in the CSR system. Bachelor Thesis, Ruprecht-Karls-Universität, Heidelberg.


Cite as: https://hdl.handle.net/21.11116/0000-000F-A425-E
Abstract
At the Cryogenic Storage Ring (CSR) at the Max Planck Institute for Nuclear Physics in Heidelberg, collisions between neutral particles and ions can be studied at temperatures as low as (5.5 ± 1.0) K . Neutral particles are generated through photodetachment of a negative ion beam using a 2 kW laser diode system at 808 nm. This laser operates in either continuous wave (cw) or pulsed mode and its power is measured with a power meter. To monitor the beam position and shape in both cw and pulsed modes on the power meter, we characterized the working regime of a Raspberry Pi NoIR v2 camera module in a test setup with a 15 mW laser at 650 nm. Additionally, we estimated the necessary filters to avoid saturation on the camera for both the 15 mW and 2 kW lasers. The laser beam shape of a 10 mW laser diode at 650 nm was measured using the knife-edge technique, and the results agreed within errors with those obtained from the camera.