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CERN Document Server 8 записей найдено  Поиск длился 0.72 секунд. 
1.
Imaging a high-power hollow electron beam non-invasively with a gas-jet-based beam profile monitor / Zhang, H D (Liverpool U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Rossi, Adriana (CERN) ; Webber-Date, Alexander (Liverpool U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Churchman, Ashley (CERN) ; Welsch, Carsten (Liverpool U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Sequeiro, C Castro (CERN) ; Wenander, Fredrik (CERN) ; Schneider, Gerhard (CERN) ; Sidorowski, Krystian (CERN) ; Ady, Marton (CERN) et al.
The Hollow Electron Lens (HEL) was proposed to actively remove the beam halo of the proton beam for the HL-LHC upgrade. Currently, the concept of generating such an electron beam is being tested in a dedicated Electron Beam Test Stand (EBTS) at CERN. [...]
2023 - 4 p. - Published in : JACoW IPAC 2023 (2023) THPL066 Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.THPL066
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2.
Absolute calibration of BSI monitors in the SPS North Area at CERN / Parsons França, Luana (CERN ; Liverpool U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Welsch, Carsten (Liverpool U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Ahdida, Claudia (CERN) ; Ravotti, Federico (CERN) ; Roncarolo, Federico (CERN) ; Philippon, Florent (CERN) ; Pezzullo, Giuseppe (CERN) ; Zhang, H D (Liverpool U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Bernhard, Johannes (CERN) ; Van Dijk, Maarten (CERN) et al.
Developments in current and future experiments in the SPS North Area (NA) and PS East Area (EA) fixed target beam lines at CERN, including the “Physics Beyond Colliders” (PBC) program, require accurate determination of the number of protons on target (POT). The re-calibration of Beam Secondary Emission Intensity monitors (BSI), recently completed in one of the NA branches, reduced the estimated uncertainty on the absolute POT to a few percent. [...]
2023 - 4 p. - Published in : JACoW IPAC 2023 (2023) THPL061 Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.THPL061
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3.
Characterization of a supersonic molecular beam for charged particle beam profile monitor / Zhang, H.D. (U. Liverpool (main) ; Cockcroft Inst. Accel. Sci. Tech.) ; Salehilashkajani, A. (U. Liverpool (main) ; Cockcroft Inst. Accel. Sci. Tech.) ; Sedlacek, O. (U. Liverpool (main) ; Cockcroft Inst. Accel. Sci. Tech. ; CERN) ; Welsch, C.P. (U. Liverpool (main) ; Cockcroft Inst. Accel. Sci. Tech.)
In present work, we report an experimental method to measure the density and distribution of a supersonic gas jet used for charged particle beam profile monitoring. The density of the gas jet used in this monitor was in the range of $10^{14}$ - $10^{17}$ molecules/$m^3$..
arXiv:2205.05386.- 2023-02 - 7 p. - Published in : Vacuum 208 (2023) 111701 Fulltext: Publication - PDF; 2205.05386 - PDF;
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4.
A gas curtain beam profile monitor using beam induced fluorescence for high intensity charged particle beams / Salehilashkajani, A (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Zhang, H D (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Ady, M (CERN) ; Chritin, N (CERN) ; Forck, P (Darmstadt, GSI) ; Glutting, J (CERN) ; Jones, O R (CERN) ; Kersevan, R (CERN) ; Kumar, N (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Lefevre, T (CERN) et al.
A minimally invasive transverse beam profile monitor based on supersonic gas curtain technology and beam-induced fluorescence has been developed and demonstrated. The concept presented can be used to measure both the profile of the proton beam in the Large Hadron Collider (LHC) and the concentricity of the electron and the proton beams in the LHC hollow electron lens. [...]
2022 - 7 p. - Published in : Appl. Phys. Lett. 120 (2022) 174101 Fulltext: PDF;
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5.
Simulations of Space-Charge and Guiding Fields Effects on the Performance of Gas Jet Profile Monitoring / Sedláček, Ondrej (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U. ; CERN) ; Forck, Peter (Darmstadt, GSI) ; Kumar, Narender (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Mazzoni, Stefano (CERN) ; Salehilashkajani, Amir (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Udrea, Serban (Darmstadt, GSI) ; Welsch, Carsten P (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Zhang, Hao D (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.)
Gas jet based profile monitors inject a usually curtain shaped gas jet across a charged particle beam and exploit the results of the minimally invasive beam-gas interaction to provide information about the beam’s transversal profile. Such monitor will be installed as part of the High Luminosity LHC upgrade at CERN in the Hollow Electron Lens (HEL). [...]
Geneva : JACoW, 2021 - 4 p. - Published in : JACoW IPAC 2021 (2021) 898-901 Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.898-901
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6.
Non-Invasive Beam Profile Monitoring for the HL-LHC Hollow Electron Lens / Salehilashkajani, Amir (Liverpool U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Ady, Marton (CERN) ; Chritin, Nicolas S (CERN) ; Forck, Peter (Darmstadt, GSI) ; Jens, Noah (CERN) ; Jones, Owain Rhodri (CERN) ; Kersevan, Roberto (CERN) ; Kumar, Narender (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Lefèvre, Thibaut (CERN) ; Mazzoni, Stefano (CERN) et al.
A Hollow Electron Lens (HEL) is currently under development for the High-Luminosity upgrade of the Large Hadron Collider (HL-LHC). In this device, a hollow electron beam co-propagates with a central proton beam and provides active halo control in the LHC. [...]
JACoW, 2021 - 4 p. - Published in : JACoW IPAC 2021 (2021) 884-887 Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.884-887
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7.
Non-invasive beam profile monitor for medical accelerators / Kumar, N (Liverpool U.) ; Salehilashkajani, A (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Zhang, H D (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Ady, M (CERN) ; Forck, P (Darmstadt, GSI) ; Glutting, J (CERN) ; Jones, O R (CERN) ; Kersevan, R (CERN) ; Marriott-Doddington, T (CERN) ; Mazzoni, S (CERN) et al.
A beam profile monitor based on a supersonic gas-curtain is currently under development for transverse profile diagnostics of electron and proton beams in the High Luminosity LHC. This monitor uses a thin supersonic gas curtain that crosses the primary beam to be characterized under an angle of 45 degrees. [...]
2020 - 6 p. - Published in : Physica Medica 73 (2020) 173-178
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8.
Design and first operation of a supersonic gas jet based beam profile monitor / Tzoganis, Vasilis (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Zhang, Hao D (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Jeff, Adam (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U. ; CERN) ; Welsch, Carsten P (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.)
Noninterceptive beam profile monitors are of great importance for many particle accelerators worldwide. Extra challenges are posed by high energy, high intensity machines and low energy low intensity accelerators. [...]
2017 - 15 p. - Published in : Phys. Rev. Accel. Beams 20 (2017) 062801 Fulltext: PDF;
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