publications

2023

1. Preprint

   A Smooth Binary Mechanism for Efficient Private Continual Observation

   Andersson, Joel Daniel, and Pagh, Rasmus

   Jun 2023

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2020

1. Report

   Orbit Correction Studies on the HL–LHC Layout and Optics V1.5

   Andersson, Joel Daniel, De Maria, Riccardo, and Gamba, Davide

   Sep 2020

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2019

1. Thesis

   A Linear Framework for Orbit Correction in the High-Luminosity Large Hadron Collider

   Andersson, Joel Daniel

   Dec 2019

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   In a circular accelerator the closed orbit can be viewed as the mean position of particles in a beam. The closed orbit is perturbed by machine errors and can be manipulated by dedicated corrector magnets. This thesis introduces a linear algebra framework for closed orbit perturbation and correction, its implementation as a Python package and its use for three studies in HL–LHC: orbit corrector budget, orbit feedback expected performance analysis and specifications for new beam position monitors. The orbit corrector budget is formulated as a convex optimization problem and solved for the current iteration of HL–LHC. Results based on a simplified model for the orbit feedback are presented, showcasing its inefficacy in maintaining collision on its own and the inherent stability in LHC. Necessary short-term beam position monitor stability for adequate position-based correction of beam separation is estimated to be under one micrometer. Finally, optimizing over linear correction strategies is offered as an interesting venue for further research.

2. IPAC

   SixTrack Version 5: Status and New Developments

   Maria, R. De, and others,

   In Proc. 10th International Particle Accelerator Conference (IPAC’19), Melbourne, Australia, 19-24 May 2019 Jun 2019

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2018

1. ICAP

   SixTrack Project: Status, Runtime Environment, and New Developments

   Maria, R. De, and others,

   In Proc. 13th International Computational Accelerator Physics Conference (ICAP’18), Key West, FL, USA, 20-24 October 2018 Oct 2018

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