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CERN Document Server 12 records found  1 - 10próximo  jump to record: Search took 0.73 seconds. 
1.
Theory of bunched beam transverse Schottky signals with stationary rf system and high-order chromaticity / Lasocha, Kacper (CERN) ; Lannoy, Christophe (CERN ; LPHE, Lausanne) ; Mounet, Nicolas (CERN) ; Alves, Diogo (CERN)
The observation of transverse Schottky spectra provides insight into intrabunch particle dynamics and serves in numerous facilities to derive important beam and machine parameters, such as the betatron tune, first-order chromaticity, and transverse emittance. The original theory confirming the validity of these observations has been, however, developed by taking strong assumptions on the particle motion in both the longitudinal and transverse planes. [...]
2024 - 13 p. - Published in : Phys. Rev. Accel. Beams 27 (2024) 112801
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2.
The Application of Machine Learning in Schottky Spectra Analysis / Bradicic, Manuel ; Lasocha, Kacper (CERN)
Schottky Spectra, that is random fluctuations of the macroscopic beam properties, such as beam position or intensity, contain rich information on machine parameters crucial for preserving the beam stability. [...]
CERN-STUDENTS-Note-2024-224. - 2024
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3.
Impact of second-order chromaticity on the Schottky spectra of bunched beam / Lasocha, Kacper (CERN) ; Alves, Diogo (CERN) ; Lannoy, Christophe (CERN ; Ecole Polytechnique, Lausanne) ; Mounet, Nicolas (CERN)
Observation of Schottky signals provides information on important beam and machine parameters, such as transverse emittance, betatron tune, and first-order chromaticity. However, the so-far developed theory of Schottky spectra does not include the impact of the higher-order chromaticity, known to be non-negligible in the case of the Large Hadron Collider (LHC). [...]
2024 - 4 p. - Published in : JACoW IPAC 2024 (2024) WEPG30 Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPG30
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4.
Impact of octupoles on the Schottky spectra of bunched beams / Lannoy, Christophe (CERN ; Ecole Polytechnique, Lausanne) ; Alves, Diogo (CERN) ; Lasocha, Kacper (CERN) ; Mounet, Nicolas (CERN) ; Pieloni, Tatiana (Ecole Polytechnique, Lausanne)
Schottky monitors serve as non-invasive tools for beam diagnostics, providing insights into crucial bunch characteristics such as tune, chromaticity, bunch profile, or synchrotron frequency distribution. However, octupole magnets commonly used in circular storage rings to mitigate instabilities through the Landau damping mechanism, can significantly affect the Schottky spectrum. [...]
2024 - 4 p. - Published in : JACoW IPAC 2024 (2024) WEPG32 Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPG32
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5.
Experimental and simulated LHC Schottky spectra / Lannoy, Christophe (CERN ; Ecole Polytechnique, Lausanne) ; Alves, Diogo (CERN) ; Lasocha, Kacper (CERN) ; Mounet, Nicolas (CERN) ; Pieloni, Tatiana (Ecole Polytechnique, Lausanne)
Schottky monitors are valuable non-invasive tools used for beam diagnostics, providing insights into crucial bunch characteristics such as tune, chromaticity, bunch profile, or synchrotron frequency distribution. This study investigates Schottky spectra at the Large Hadron Collider (LHC) through a combination of simulations and measurements. [...]
2024 - 4 p. - Published in : JACoW IPAC 2024 (2024) WEPG31 Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPG31
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6.
Electron beam studies on a beam position monitor based on Cherenkov diffraction radiation / Pakuza, Collette (JAI, UK) ; Malyzhenkov, Alexander (CERN) ; Schloegelhofer, Andreas (CERN) ; Aksoy, Avni (CERN) ; Spear, Bethany (JAI, UK) ; Senes, Eugenio (CERN) ; Lasocha, Kacper (CERN) ; Wendt, Manfred (CERN) ; Krupa, Michal (CERN) ; Chritin, Nicolas (CERN) et al.
A beam position monitor based on Cherenkov diffraction radiation (ChDR BPM) is currently under investigation to disentangle the electromagnetic field of an electron bunch from that of a proton bunch travelling together in time and space in the beam-line of the AWAKE plasma acceleration experiment at CERN. The signals from a horizontal pair of ChDR BPM radiators have been studied under a variety of beam conditions at the CLEAR electron beam test facility. [...]
2023 - 4 p. - Published in : JACoW IPAC 2023 (2023) THPL146 Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.THPL146
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7.
Non-Invasive Beam Diagnostics with Schottky Signals and Cherenkov Diffraction Radiation / Lasocha, Kacper
This dissertation reports on the developments made regarding two techniques used for non-invasive beam diagnostics: the analysis of Schottky signals and the observation of Cherenkov Diffraction Radiation (ChDR) [...]
CERN-THESIS-2022-285 - 144 p.

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8.
Estimation of transverse bunch characteristics in the LHC using Schottky-based diagnostics / Lasocha, Kacper (Jagiellonian U. ; CERN) ; Alves, Diogo (CERN)
In this paper, we discuss different approaches for the estimation of transverse bunch characteristics, namely, tune and chromaticity, using Schottky-based diagnostics. In particular, we show how, depending on the signal quality and the availability of other instruments or information sources, we can choose appropriate strategies combining both spectrum fitting procedures and explicit parameter calculations. [...]
2022 - 13 p. - Published in : Phys. Rev. Accel. Beams 25 (2022) 062801 Fulltext: PDF;
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9.
Kalman filter-based longitudinal phase-space reconstruction method for hadron machines / Alves, Diogo (CERN) ; Lasocha, Kacper (CERN)
This work proposes a novel longitudinal phase-space reconstruction method for hadron machines. The proposed method is based on a Kalman filter and can therefore provide real-time estimates of the phase-space reconstruction. [...]
2021 - 9 p. - Published in : Phys. Rev. Accel. Beams 24 (2021) 072801 Fulltext: PDF;
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10.
Estimation of longitudinal bunch characteristics in the LHC using Schottky-based diagnostics / Lasocha, Kacper (CERN) ; Alves, Diogo (CERN)
The Large Hadron Collider (LHC) Schottky monitors have been designed to measure various parameters of relevance to beam quality, namely tune, momentum spread, and chromaticity. In this work, we present how this instrument can be used to estimate longitudinal bunch characteristics, such as longitudinal bunch profile or synchrotron frequency distribution. [...]
2020 - 8 p. - Published in : Phys. Rev. Accel. Beams 23 (2020) 062803 Fulltext from Publisher: PDF;
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