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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.
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Beam Breakup Instability Studies of Powerful Energy Recovery Linac for Experiments / Setiniyaz, Sadiq (Jefferson Lab ; Lancaster U. ; Daresbury) ; Apsimon, R. (Lancaster U. ; Daresbury) ; Williams, P.H. (Daresbury) ; Barbagallo, C. (IJCLab, Orsay ; IPhT, Saclay ; CERN) ; Bogacz, S.A. (Jefferson Lab) ; Bodenstein, R.M. (Jefferson Lab) ; Deitrick, K. (Jefferson Lab)
The maximum achievable beam current in an Energy Recovery Linac (ERL) is often constrained by Beam Breakup (BBU) instability. [...]
arXiv:2409.02798. -
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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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The CompactLight Design Study / D'Auria, G (Sincrotrone Trieste) ; Adli, E (Oslo U.) ; Aicheler, M (Helsinki Inst. of Phys.) ; Aksoy, A (Ankara U.) ; Alesini, D (Frascati) ; Apsimon, R (Daresbury ; Lancaster U.) ; Arnsberg, J (KIT, Karlsruhe) ; Auchettl, R (ASP, Melbourne) ; Bainbridge, A (Daresbury) ; Balazs, K (CERN) et al.
CompactLight is a Design Study funded by the European Union under theHorizon 2020 research and innovation funding programme, with Grant Agreement No. 777431.CompactLight was conducted by an International Collaboration of 23 internationallaboratories and academic institutions, three private companies, and five third parties.The project, which started in January 2018 with a duration of 48 months, aimed to designan innovative, compact, and cost-effective hard X-ray FEL facility complemented by asoft X-ray source to pave the road for future compact accelerator-based facilities. [...]
2024 - 208 p. - Published in : Eur. Phys. J. Spec. Top. 233 (2024) 1-208 Fulltext: PDF;

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Beam dynamics driven design of powerful energy recovery linac for experiments / Bogacz, S A (Jefferson Lab) ; André, K D J (CERN) ; Brüning, O (CERN) ; Holzer, B J (CERN) ; Hounsell, B R (U. Liverpool (main)) ; Klein, M (U. Liverpool (main)) ; Militsyn, B L (Daresbury) ; Williams, P H (Daresbury) ; Segurana, G Pérez (Lancaster U.) ; Bailey, I (Lancaster U.) et al.
Powerful ERL for experiments (PERLE) is a novel energy recovery linac (ERL) test facility [1], designed to validate choices for a 50 GeV ERL foreseen in the design of the Large Hadron Electron Collider and the Future Circular Collider and to host dedicated nuclear and particle physics experiments. Its main goal is to demonstrate the high current, continuous wave, multipass operation with superconducting cavities at 802 MHz. [...]
2024 - 15 p. - Published in : Phys. Rev. Accel. Beams 27 (2024) 031603 Fulltext: PDF;

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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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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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XLS Deliverable D2.3 : Conceptual Design Report of the CompactLight X-ray FEL / CompactLight Partnership Collaboration
XLS-Report-2021-010. - 2021. - 361 p.
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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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10.

Minimising Transverse Multipoles in Accelerating RF Cavities via Azimuthally Modulated Designs / Wroe, Laurence (JAI, UK) ; Apsimon, Robert (Lancaster U. (main)) ; Dosanjh, Manjit (CERN) ; Sheehy, Suzanne (Melbourne U.)
In this paper, we build upon previous work of designing RF structures that support modes with tailored multipolar fields by applying the concept to negate the transverse multipoles in accelerating RF cavities caused by the incorporation of waveguide slots and tuning deformations. We outline a systematic method for designing structures that minimise these transverse multipoles and present analysis of simulations of two different minimisation designs..
2022 - 4 p. - Published in : JACoW IPAC 2022 (2022) 610-613 Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.610-613

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See also: similar author names
113	Apsimon, R J
28	Apsimon, R.
3	Apsimon, R.J.
31	Apsimon, Robert
1	Apsimon, Robert J

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