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2022-09-12
15:25
Unsupervised Anomaly Detection for the PLT Detector with the CMS Collaboration at the LHC
This document presents a concise report and review of the Summer Student Project developed towards applying effective machine learning analysis techniques for the unsupervised search of anomalies in the BRIL-PLT experimental data..
CERN-OPEN-2022-009. - 2022. - 10 p.
Preprint

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2022-03-01
11:23
HL-LHC Experiment Data Quality Working Group Summary Report / Buffat, Xavier (CERN) ; Efthymiopoulos, Ilias (CERN) ; Medina Miranda, Luis David (CERN) ; Tomas Garcia, Rogelio (CERN) ; Wenninger, Jorg (CERN) ; Demers Konezny, Sarah Marie (Yale University (US)) ; Einsweiler, Kevin Frank (Lawrence Berkeley National Lab. (US)) ; Hawkings, Richard (CERN) ; Giacobbe, Benedetto (Universita e INFN, Bologna (IT)) ; Bohm, Christian (Stockholm University (SE)) et al.
This report summarizes the results of the HL-LHC Experimental Data Quality Working Group (EDQ WG). [...]
CERN-BE-2022-001. - 2022.
Full text

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2018-05-25
14:56
PcInterlock: Implementation and Operational Experience with the Optics Interlock / Schaumann, Michaela (CERN) ; Calia, Andrea (CERN) ; Fuchsberger, Kajetan (CERN) ; Wenninger, Jorg (CERN)
In 2016 the luminosity reach of the LHC was increased by reducing the β-function in the main collision points below the design value to β∗ = 40 cm. [...]
CERN-BE-2018-001. - 2018. - 19 p.
Full text

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2017-05-26
06:40
Beam Position Measurement System Design / Schmickler, Hermann (CERN)
For newcomers, but also with interesting details for oldies, all components of a modern beam position measurement system are reviewed and explained. From specifications, sensor types, analogue and digital electronics over calibration methods the whole field will be covered. [...]
2016 - 7 p. - Published in : 10.18429/JACoW-IBIC2015-THALA01 Fulltext: PDF;
In : International Beam Instrumentation Conference , Melbourne, Australia, 13 - 17 Sep 2015, pp.THALA01

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2017-02-21
16:11
A General Method for Motion Compensation in X-ray Computed Tomography / Hancock, Steven (CERN) ; Biguri, Ander (Bath U.) ; Dosanjh, Manjit (CERN) ; Soleimani, Manuchehr (Bath U.)
Motion during data acquisition is a known source of error in medical tomography, resulting in blur artefacts in the regions that move. It is critical to reduce these artefacts in applications such as image-guided radiation therapy as a clearer image translates into a more accurate treatment and the sparing of healthy tissue close to a tumour site. [...]
CERN-OPEN-2017-018.- Bath : Bath U., 2017 - 22 p. - Published in : Phys. Med. Biol. 62 (2017) 6532–6549 IOP OA article: PDF; Preprint: PDF;

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2016-12-01
14:36
Differential Phase Detector for Precise Phase Alignment / Olexa, Jakub (CERN) ; Gasior, Marek (CERN)
This paper presents a differential phase detector circuit, whose phase-to-voltage characteristic has an extremum when its two input signals are exactly in phase. [...]
CERN-BE-2016-003. - 2016. - 5 p.
Full text

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2016-08-12
06:33
Data Analysis and System Survey Framework for the LHC Beam Loss Monitoring System / Xu, Chen (CERN) ; Dehning, Bernd (CERN) ; Zamantzas, Christos (CERN)
A data analysis framework has been developed to perform systematic queries and automatic analysis of the large amount of data produced by the LHC beam loss monitoring system. The framework is used to provide continuous system supervision and can give advance warning of any potential system failures. [...]
CERN-ACC-2016-120.- 2016 - 4 p. - Published in : 10.18429/JACoW-IPAC2016-THPOY046 Published version from JACoW: PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.THPOY046

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2016-08-12
06:33
Time Scale of Crab Cavity Failures Relevant for High Luminosity LHC / Sjobak, Kyrre (CERN) ; Bruce, Roderik (CERN) ; Burkhardt, Helmut (CERN) ; Kwee-Hinzmann, Regina (Royal Holloway, U. of London) ; Macpherson, Alick (CERN) ; Santamaría García, Andrea (Ecole Polytechnique, Lausanne ; CERN)
A good knowledge of the effects of the crab cavities, required for the baseline High Luminosity LHC (HL-LHC), is needed before the results of the first tests of crab cavity prototypes in the SPS, planned for 2018, will be available. In case of crab cavity failures, we have to make sure that time scales are long enough so that the beams can be cleanly dumped before damage by beam loss occurs. [...]
CERN-ACC-2016-123.- 2016 - 4 p. - Published in : 10.18429/JACoW-IPAC2016-THPOY043 Published version from JACoW: PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.THPOY043

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2016-08-12
06:33
Tolerance Studies and Dispersion Free Steering for Extreme Low Emittance in the FCC-ee Project / Aumon, Sandra (CERN) ; Doblhammer, Andreas (TU Vienna) ; Härer, Bastian (KIT, Karlsruhe, IPE) ; Holzer, Bernhard (CERN) ; Oide, Katsunobu (KEK, Tsukuba)
The FCC-ee study is investigating the design of a 100 km e⁺/e⁻ circular collider for precision measurements and rare decay observations in the range of 90 to 350 GeV center of mass energy with luminosities in the order of 10³⁵ cm⁻²s⁻¹. In order to reach such performances, an extreme focusing of the beam is required in the interaction regions with a low vertical beta function of 2 mm at the IP. [...]
CERN-ACC-2016-128.- 2016 - 4 p. - Published in : 10.18429/JACoW-IPAC2016-THPOR001 Published version from JACoW: PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.THPOR001

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2016-08-12
06:32
Integration and Testing of 3 Consecutive CLIC Two-Beam Modules / Vamvakas, Alexios (CERN) ; Aicheler, Markus (Helsinki Inst. of Phys.) ; Döbert, Steffen (CERN) ; Duquenne, Mathieu (CERN) ; Mainaud Durand, Helene (CERN) ; Rude, Vivien (Unlisted, FR) ; Sosin, Mateusz (CERN) ; Väinölä, Jukka (Helsinki Inst. of Phys.)
CLIC (Compact LInear Collider) is a study of a 50 km long linear electron-positron collider, consisting of ap-proximately 20,000 repetitive 2 m long modules. Micron level manufacturing and alignment tolerances are re-quired for the RF and magnet components due to the nanometre beam size and luminosity goal. [...]
CERN-ACC-2016-145; CLIC-Note-1103.- 2016 - 3 p. - Published in : 10.18429/JACoW-IPAC2016-THPOR033 Published version from JACoW: PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.THPOR033

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