On the Temperature Dependence of LHCb’s Vertex Locator Pixel Noise

Gunnink, Fabian (2022) On the Temperature Dependence of LHCb’s Vertex Locator Pixel Noise. Bachelor's Thesis, Physics.

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Abstract

The Large Hadron Collider (LHC) is the world’s largest particle accelerator, located near Geneva, Switzerland. One of the current experiments, LHCb, tries to resolve a major conundrum in physics: the matter-antimatter asymmetry problem. The results from the LHCb experiment might shed new light on this puzzle by studying the decay of a specific particle to probe the validity of the current model of particle physics. LHCb’s innermost detector, surrounding the proton-proton collisions created by the LHC, is the Vertex Locator (VELO), a silicon pixel detector used to reconstruct the trajectory of charged particles created in the collisions. This report investigates how the background noise distribution of the pixels within this detector behaves under different temperature conditions (at 18C, 8C, −12C, −21C and −27C). We find that for 8 out of 9 subsystems analyzed, the noise distribution increases in width for the lowest trim setting and decreases in width for the highest trim level, as the temperature drops. Moreover, the number of pixels that need to be masked dramatically increases for lower temperatures.

Item Type:	Thesis (Bachelor's Thesis)
Supervisor name:	Bruyn, K.A.M. de
Degree programme:	Physics
Thesis type:	Bachelor's Thesis
Language:	English
Date Deposited:	24 Jun 2022 10:57
Last Modified:	24 Jun 2022 10:57
URI:	https://fse.studenttheses.ub.rug.nl/id/eprint/27361

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