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2024-05-24
00:09
Searches for New Physics Using Unsupervised Machine Learning for Anomaly Detection at the ATLAS Detector and the Development of Particle Identification Algorithms for the HL-LHC / Crosby, Jacob Edwin (Oklahoma State University (US))
This document contains discussions on completed and ongoing projects that have devel- oped over the past few years while working on the ATLAS detector located at CERN in Geneva, Switzerland. The first discussion will be on my qualification task for the ATLAS collaboration which is on the development and future plans of the DL1d tagger that is currently used as a base- line tagger for run 4 of the ATLAS detector. [...]
CERN-THESIS-2024-060.- 239 p. Fulltext: PDF; External link: Approve this document (restricted)

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2024-05-24
00:01
Searches for New Physics Using Unsupervised Machine Learning for Anomaly Detection at the ATLAS Detector and the Development of Particle Identification Algorithms for the HL-LHC / Crosby, Jacob Edwin (Oklahoma State University (US))
This document contains discussions on completed and ongoing projects that have devel- oped over the past few years while working on the ATLAS detector located at CERN in Geneva, Switzerland. The first discussion will be on my qualification task for the ATLAS collaboration which is on the development and future plans of the DL1d tagger that is currently used as a base- line tagger for run 4 of the ATLAS detector. [...]
CERN-THESIS-2024-059.- 239 p. Fulltext: PDF; External link: Approve this document (restricted)

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2024-05-21
12:34
Chamonix Workshop 2024 summary / Lamont, Mike (CERN) ; Jones, Rhodri (CERN)
The Chamonix Workshop 2024 took place from 29 January to 1 February 2024 at the “Majestic” conference centre in Chamonix. [...]
CERN-ACC-NOTE-2024-0010.
- 2024. - 63 p.

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2024-05-21
12:21
LHC Performance Workshop 2022 summary / Lamont, Mike (CERN) ; Jones, Rhodri (CERN)
The LHC Performance Workshop took place from 24 to 27 January 2022 via video conference. [...]
CERN-ACC-NOTE-2024-0009.
- 2024. - 56 p.
Full text

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2024-05-15
14:38
LHC MD 6944: RF Voltage Calibration / Karlsen-Baeck, Birk Emil (Sapienza Universita e INFN, Roma I (IT)) ; Argyropoulos, Theodoros (CERN) ; Calaga, Rama (CERN) ; Damerau, Heiko (CERN) ; Dlugosz, Dominika Agnieszka ; Karpov, Ivan (CERN) ; Timko, Helga (CERN)
This note summarizes the procedure and results from the MD on beam-based voltage calibration of the RF system. [...]
CERN-ACC-NOTE-2024-0008.
- 2024. - 24 p.
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2024-04-30
18:48
Studies of crystal collimation for heavy ion operation at the LHC / Cai, Rongrong
At CERN’s Large Hadron Collider (LHC), proton and heavy-ion beams are accelerated to multi-TeV energies to be collided for the needs of the scientific community around the world [...]
CERN-THESIS-2024-045 11188. - 245 p.


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2024-04-16
11:56
Corrections of high-order nonlinearities in the LHC and High-Luminosity LHC beam optics / Dilly, Joschua Werner
The impact of high-order nonlinear magnetic field errors on the performance of the Large Hadron Collider (LHC) and its planned High-Luminosity upgrade, the HL-LHC, has been extensively studied [...]
CERN-THESIS-2023-382 DOI:10.18452/28273. - Berlin : Humboldt-Universität zu Berlin, 2024-03-01. - 233 p.


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2024-04-16
06:50
Effects of cavity pre-detuning on RF power transients at injection into the LHC / Karlsen-Baeck, B E (CERN ; Rome U.) ; Argyropoulos, T (CERN) ; Butterworth, A (CERN) ; Calaga, R (CERN) ; Karpov, I (CERN) ; Timko, H (CERN) ; Zampetakis, M (CERN)
At injection into the Large Hadron Collider (LHC), the radiofrequency (RF) system is perturbed by beam-induced voltage resultingin strong RF power transients and the instant detuning of thecavities. The automatic tuning system, however, needs time for themechanical compensation of the resonance frequency to takeplace. [...]
2024 - 8 p. - Published in : JINST 19 (2024) T04005 Fulltext: PDF;
In : 68th ICFA Advanced Beam Dynamics workshop on high-Intensity and High-Brightness Hadron Beams (HB 2023), CERN, Geneva, Switzerland, 9 - 13 Oct 2023, pp.T04005

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2024-04-11
11:49
Measurement of emittance growth and oscillation spectrum for different damper gains (MD 9407) / Buffat, Xavier (CERN) ; Fornara, Andrea (University of Manchester (GB)) ; Giacomel, Lorenzo (CERN) ; Kostoglou, Sofia (CERN) ; Lannoy, Christophe (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Mounet, Nicolas (CERN) ; Radoslavova, Anna Valeri (Heidelberg University (DE)) ; Sterbini, Guido (CERN) ; Valuch, Daniel (CERN)
The procedure of an experiment aiming at studying the impact of the transverse damper gain on the beam oscillation spectrum and on the emittance growth of colliding beams is described along with the corresponding results. [...]
CERN-ACC-NOTE-2024-0007.
- 2024.
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2024-04-11
11:49
Octupole threshold with trains of bunches (MD 9403) / Buffat, Xavier (CERN) ; Giacomel, Lorenzo (CERN) ; Rumolo, Giovanni (CERN) ; Mether, Lotta (CERN) ; Mounet, Nicolas (CERN) ; Paraschou, Konstantinos (CERN)
We describe an experiment aiming at determining the stability threshold in terms of octupole current for bunch trains at flat top in the LHC. [...]
CERN-ACC-NOTE-2024-0006.
- 2024.
Full text

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