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CERN Document Server 找到 36 筆記錄  1 - 10下一個最後  跳到記錄: 檢索需時 0.59 秒. 
1.
Measurement of the emittance of accelerated electron bunches at the AWAKE experiment / AWAKE Collaboration
The vertical plane transverse emittance of accelerated electron bunches at the AWAKE experiment at CERN has been determined, using three different methods of data analysis. [...]
arXiv:2411.08681. - 20.
Fulltext
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2.
Beam studies using a Cherenkov diffraction based beam position monitor for AWAKE / Spear, Bethany (JAI, UK) ; Pakuza, Collette (CERN) ; Senes, Eugenio (CERN) ; Wendt, Manfred (CERN) ; Burrows, Philip (JAI, UK) ; Mazzoni, Stefano (CERN) ; Lefevre, Thibaut (CERN)
A beam position monitor based on Cherenkov diffraction radiation (ChDR) is being investigated as a way to disentangle the signals generated by the electromagnetic fields of a short-pulse electron bunch from a long proton bunch co-propagating in the AWAKE plasma acceleration experiment at CERN. These ChDR BPMs have undergone renewed testing under a variety of beam conditions with proton and electron bunches in the AWAKE common beamline, at 3 different frequency ranges between 20-110 GHz to quantify the effectiveness of discriminating the electron beam position with and without proton bunches present. [...]
2024 - 4 p. - Published in : JACoW IPAC 2024 (2024) WEPG49 Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPG49
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3.
Selective electron beam sensing through coherent Cherenkov diffraction radiation / Senes, E (CERN) ; Krupa, M (CERN) ; Mazzoni, S (CERN) ; Lasocha, K (CERN) ; Lefevre, T (CERN) ; Shloegelhofer, A (CERN) ; Wendt, M (CERN) ; Davut, C (Manchester U.) ; Karataev, P (JAI, UK) ; Pakuza, C (JAI, UK) et al.
We exploit the coherent emission of Cherenkov diffraction radiation (ChDR) by a relativistic electron beam to sense its position even in the presence of other particle beams. ChDR is produced in alumina inserts embedded in the vacuum chamber walls and recorded in a narrow band centered at 30 GHz. [...]
2024 - 6 p. - Published in : Phys. Rev. Res. 6 (2024) 023278 Fulltext: PDF;
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4.
Experimental Observation of Motion of Ions in a Resonantly Driven Plasma Wakefield Accelerator / AWAKE Collaboration
We show experimentally that an effect of motion of ions, observed in a plasma-based accelerator, depends inversely on the plasma ion mass. [...]
arXiv:2406.16361. - 9.
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5.
Characterisation of Cherenkov Diffraction Radiation Using Electro-Optical Methods / Schlögelhofer, Andreas (CERN ; TU Vienna) ; Duvillaret, Lionel (KAPTEOS) ; Lefèvre, Thibaut (CERN) ; Mazzoni, Stefano (CERN) ; Senes, Eugenio (CERN)
The properties of Cherenkov diffraction radiation (ChDR) have been studied extensively during the recent years to be exploited for non-invasive beam diagnostic devices for short bunches. The dependence of charge and the influence of the bunch form factor on the coherent part of the radiated spectrum have been demonstrated and studied in the past. [...]
2023 - 4 p. - Published in : JACoW IBIC 2023 (2023) TUP022 Fulltext: PDF;
In : 12th International Beam Instrumentation Conference (IBIC 2023), Saskatoon, Canada, 10 - 14 Sep 2023, pp.TUP022
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6.
Application of a Camera Array for the Upgrade of the AWAKE Spectrometer / Senes, Eugenio (CERN) ; Cooke, David (Royal Holloway, U. of London) ; Mazzoni, Stefano (CERN) ; Pannell, Fern (Royal Holloway, U. of London) ; Turner, Marlene (CERN) ; Wing, Matthew (Royal Holloway, U. of London) ; Zevi Della Porta, Giovanni (CERN ; Lindau, Max Planck Inst.)
The first run of the AWAKE experiment successfully demonstrated the acceleration of an electron beam in the plasma wakefields of a relativistic proton beam. The planned second run will focus on the control of the emittance  of accelerated electrons, requiring an upgrade of the  existing spectrometer. Preliminary measurements showed that this might be achieved by improving the resolution of the scintillator and with a new design of the optical system. This contribution discusses the application of a digital camera array in close proximity of the spectrometer scintillator, to enable the accelerated electron beam emittance measurement..
2023 - 5 p. - Published in : JACoW IBIC 2023 (2023) 230-234 Fulltext: PDF;
In : 12th International Beam Instrumentation Conference (IBIC 2023), Saskatoon, Canada, 10 - 14 Sep 2023, pp.230-234
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7.
A Generic Real-Time Software in C++ for Digital Camera-Based Acquisition Systems at CERN / Topaloudis, Athanasios (CERN) ; Bravin, Enrico (CERN) ; Burger, Stephane (CERN) ; Jackson, Stephen (CERN) ; Mazzoni, Stefano (CERN) ; Poimenidou, Eirini (CERN) ; Senes, Eugenio (CERN)
Until recently, most of CERN’s beam visualisation systems have been based on increasingly obsolescent analogue cameras. Hence, there is an on-going campaign to replace old or install new digital equivalents. [...]
2023 - 6 p. - Published in : JACoW ICALEPCS 2023 (2023) THPDP069 Fulltext: PDF;
In : 19th International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS 2023), Cape Town, South Africa, 7 - 13 Oct 2023, pp.THPDP069
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8.
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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9.
Hosing of a long relativistic particle bunch in plasma / AWAKE Collaboration
Experimental results show that hosing of a long particle bunch in plasma can be induced by wakefields driven by a short, misaligned preceding bunch. Hosing develops in the plane of misalignment, self-modulation in the perpendicular plane, at frequencies close to the plasma electron frequency, and are reproducible. [...]
arXiv:2309.03785.- 2024-02-13 - 7 p. - Published in : Phys. Rev. Lett. 132 (2024) 075001 Fulltext: 2309.03785 - PDF; Publication - PDF;
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10.
Filamentation of a Relativistic Proton Bunch in Plasma / AWAKE Collaboration
We show in experiments that a long, underdense, relativistic proton bunch propagating in plasma undergoes the oblique instability, that we observe as filamentation. We determine a threshold value for the ratio between the bunch transverse size and plasma skin depth for the instability to occur. [...]
arXiv:2312.13883.- 2024-05-07 - 8 p. - Published in : Phys. Rev. E 109 (2024) 055203 Fulltext: Publication - PDF; 2312.13883 - PDF; External link: Physics Synopsis
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