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CERN Document Server Encontrados 2,050 registros  1 - 10siguientefinal  ir al registro: La búsqueda tardó 0.05 segundos. 
1.
(100)
Influence of heterogeneous media on Very High Energy Electron (VHEE) dose penetration and a Monte Carlo-based comparison with existing radiotherapy modalities / Lagzda, Agnese (Manchester U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Angal-Kalinin, Deepa (Cockcroft Inst. Accel. Sci. Tech. ; Daresbury) ; Jones, James (Cockcroft Inst. Accel. Sci. Tech. ; Daresbury) ; Aitkenhead, Adam (Unlisted, UK ; Manchester U.) ; Kirkby, Karen J (Unlisted, UK ; Manchester U.) ; MacKay, Ranald (Unlisted, UK ; Manchester U.) ; Van Herk, Marcel (Unlisted, UK ; Manchester U.) ; Farabolini, Wilfrid (CERN) ; Zeeshan, Sumaira (CERN) ; Jones, Roger M (Manchester U. ; Cockcroft Inst. Accel. Sci. Tech.)
• First experimental demonstration of the relative insensitivity of VHEE beams to inhomogeneities. • Topas/GEANT4 simulations on experiments conducted at CERN’s CLEAR facility are in good agreement. [...]
2020 - 12 p. - Published in : Nucl. Instrum. Methods Phys. Res., B 482 (2020) 70-81
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2.
(91)
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.
Fulltext
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3.
(79)
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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4.
(79)
VHEE FLASH sparing effect measured at CLEAR, CERN with DNA damage of pBR322 plasmid as a biological endpoint / Wanstall, Hannah C (Manchester U. ; Daresbury) ; Korysko, Pierre (Oxford U. ; CERN) ; Farabolini, Wilfred (CERN) ; Corsini, Roberto (CERN) ; Bateman, Joseph J (Oxford U., Theor. Phys.) ; Rieker, Vilde (CERN ; Oslo U.) ; Hemming, Abigail (U. Manchester (main)) ; Henthorn, Nicholas T (U. Manchester (main) ; Manchester U.) ; Merchant, Michael J (Manchester U.) ; Santina, Elham (Manchester U.) et al.
Ultra-high dose rate (UHDR) irradiation has been shown to have a sparing effect on healthy tissue, an effect known as ‘FLASH’. This effect has been studied across several radiation modalities, including photons, protons and clinical energy electrons, however, very little data is available for the effect of FLASH with Very High Energy Electrons (VHEE). [...]
2024 - 13 p. - Published in : Sci. Rep. 14 (2024) 14803 Fulltext: PDF;
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5.
(78)
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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6.
(77)
Evaluating very high energy electron RBE from nanodosimetric pBR322 plasmid DNA damage / Small, K L (Manchester U. ; Daresbury) ; Henthorn, N T (Manchester U. ; Unlisted, GB) ; Angal-Kalinin, D (Manchester U. ; Daresbury ; Cockcroft Inst. Accel. Sci. Tech.) ; Chadwick, A L (Manchester U. ; Unlisted, GB) ; Santina, E (Manchester U. ; Unlisted, GB) ; Aitkenhead, A (Manchester U. ; Unlisted, GB) ; Kirkby, K J (Manchester U. ; Unlisted, GB) ; Smith, R J (Daresbury ; Cockcroft Inst. Accel. Sci. Tech.) ; Surman, M (Daresbury ; Cockcroft Inst. Accel. Sci. Tech.) ; Jones, J (Daresbury ; Cockcroft Inst. Accel. Sci. Tech.) et al.
This paper presents the first plasmid DNA irradiations carried out with Very High Energy Electrons (VHEE) over 100–200 MeV at the CLEAR user facility at CERN to determine the Relative Biological Effectiveness (RBE) of VHEE. DNA damage yields were measured in dry and aqueous environments to determine that ~ 99% of total DNA breaks were caused by indirect effects, consistent with other published measurements for protons and photons. [...]
2021 - 12 p. - Published in : Sci. Rep. 11 (2021) 3341 Fulltext from publisher: PDF;
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7.
(69)
Dispersion in closed, off-axis orbit bumps / Apsimon, R (Lancaster U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Esberg, J (CERN) ; Owen, H (Cockcroft Inst. Accel. Sci. Tech. ; Manchester U.)
In this paper we present a proof to show that there exists no system of linear or nonlinear optics which can simultaneously close multiple local orbit bumps and dispersion through a single beam transport region. The second combiner ring in the CLIC drive beam recombination system, CR2, is used as an example of where such conditions are necessary. [...]
2016 - 7 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 830 (2016) 88-94
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8.
(69)
Elevating electron energy gain and betatron X-ray emission in proton-driven wakefield acceleration / Saberi, Hossein (Manchester U. ; Daresbury) ; Xia, Guoxing (Manchester U. ; Daresbury) ; Liang, Linbo (Manchester U. ; Daresbury) ; Farmer, John Patrick (CERN ; Munich, Max Planck Inst.) ; Pukhov, Alexander (Heinrich Heine U., Dusseldorf)
The long proton beams present at CERN have the potential to evolve into a train of microbunches through the self-modulation instability process. The resonant wakefield generated by a periodic train of proton microbunches can establish a high acceleration field within the plasma, facilitating electron acceleration. [...]
arXiv:2404.19711.- 2024-09-01 - 7 p. - Published in : Phys. Plasmas 31 (2024) 093104 Fulltext: 2404.19711 - PDF; Publication - PDF;
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9.
(66)
Prediction of Beam Losses during Crab Cavity Quenches at the HL-LHC / Apsimon, Robert (Lancaster U.) ; Burt, Graeme (Cockcroft Inst. Accel. Sci. Tech.) ; Dexter, Amos (Cockcroft Inst. Accel. Sci. Tech.) ; Shipman, Nick (Cockcroft Inst. Accel. Sci. Tech.) ; Baudrenghien, Philippe (CERN) ; Calaga, Rama (CERN) ; Castilla, Alejandro (CERN) ; Macpherson, Alick (CERN) ; Sjobak, Kyrre Ness (CERN) ; Santamaria Garcia, Andrea (CERN) et al.
Studies of the crab cavities at KEKB revealed that the RF phase could shift by up to 50o within ~50 us during a quench; while the cavity voltage is still at approximately 75% of its nominal amplitude. If such a failure were to occur on the HL-LHC crab cavities, it is likely that the machine would sustain substantial damage to the beam line and surrounding infrastructure due to uncontrolled beam loss before the machine protection system could dump the beam. [...]
arXiv:1812.01308.- 2019-06-19 - 22 p. - Published in : Phys. Rev. Accel. Beams 22 (2019) 061001 Fulltext: PDF; Fulltext from Publisher: PDF;
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10.
(64)
Development of the Self-Modulation Instability of a Relativistic Proton Bunch in Plasma / AWAKE Collaboration
Self-modulation is a beam-plasma instability that is useful to drive large-amplitude wakefields with bunches much longer than the plasma skin depth. We present experimental results showing that, when increasing the ratio between the initial transverse size of the bunch and the plasma skin depth, the instability occurs later along the bunch, or not at all, over a fixed plasma length, because the amplitude of the initial wakefields decreases. [...]
arXiv:2305.05478.- 2023-08-01 - 10 p. - Published in : Phys. Plasmas 30 (2023) 083104 Fulltext: 2305.05478 - PDF; Publication - PDF;
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