E. Senes

CLIC readiness report

E. Adli, G. D’Auria, Nuria Catalán Lasheras, Vera Cilento et autres

Abstract The Compact Linear Collider (CLIC) is a TeV-scale high-luminosity linear e + e − collider studied by the international CLIC and CLICdp collaborations hosted by CERN. CLIC uses a two-beam acceleration scheme, in which normal-conducting high-gradient 12 GHz accelerating structures are …

Experimental Observation of the Motion of Ions in a Resonantly Driven Plasma Wakefield Accelerator

M. Turner, Erwin Walter, C. Amoedo, N. Torrado et autres

We show experimentally that an effect of motion of ions, observed in a plasma-based accelerator, depends inversely on the plasma ion mass. The effect appears within a single wakefield event and manifests itself as a bunch tail, occurring only when sufficient motion …

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Design and experimental verification of a bunch length monitor based on coherent Cherenkov diffraction radiation

C. Davut, Guoxing Xia, Ö. Apsimon, J. McGunigal et autres

This paper presents the design and experimental commissioning of a noninvasive electron bunch length monitor based on the detection of coherent Cherenkov diffraction radiation (ChDR). The measurement technique effectively eliminates the influence of bunch-by-bunch charge fluctuations, as each detector measures the signal …

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The study of high-frequency pick-ups for electron beam position measurements in the AWAKE common beamline

C. Pakuza, Eirini Poimenidou, E. Senes, M. Wendt et autres

The common beamline of the AWAKE experiment at CERN involves the co-propagation of two particle beams: protons with 48 nC bunch charge and 250 ps bunch length, and electrons with up to 600 pC bunch charge and approximately 4 ps bunch length. …

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Measurement of the emittance of accelerated electron bunches at the AWAKE experiment

D. Cooke, F. N. Pannell, G. Zevi Della Porta, John Farmer et autres

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. This is a proof-of-principle measurement using the existing AWAKE electron spectrometer to validate the measurement technique. Large …

Selective electron beam sensing through coherent Cherenkov diffraction radiation

E. Senes, M. Krupa, S. Mazzoni, K. Łasocha et autres

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 …

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Filamentation of a relativistic proton bunch in plasma

L. Verra, C. Amoedo, N. Torrado, A. Clairembaud et autres

We show in experiments that a long, underdense, relativistic proton bunch propagating in plasma undergoes the oblique instability, which we observe as filamentation. We determine a threshold value for the ratio between the bunch transverse size and plasma skin depth for the …

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Hosing of a Long Relativistic Particle Bunch in Plasma

T. Nechaeva, L. Verra, J. Pucek, L. Ranc et autres

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 …

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Development of the self-modulation instability of a relativistic proton bunch in plasma

L. Verra, Samuel Stefan Wyler, T. Nechaeva, J. Pucek et autres

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 …

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A beam position monitor for electron bunch detection in the presence of a more intense proton bunch for the AWAKE Experiment

C. Pakuza, Philip Burrows, R. Corsini, Wilfrid Farabolini et autres

Abstract The Advanced Proton Driven Plasma Wakefield Experiment (AWAKE) at CERN uses 6 cm long proton bunches extracted from the Super Proton Synchrotron (SPS) at 400 GeV beam energy to drive high gradient plasma wakefields for the acceleration of electron bunches to …

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The AWAKE Run 2 Programme and Beyond

К. В. Лотов, P. Muggli, M. Wing, R. Agnello et autres

Plasma wakefield acceleration is a promising technology to reduce the size of particle accelerators. The use of high energy protons to drive wakefields in plasma has been demonstrated during Run 1 of the AWAKE programme at CERN. Protons of energy 400 GeV …

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Controlled Growth of the Self-Modulation of a Relativistic Proton Bunch in Plasma

L. Verra, G. Zevi Della Porta, J. Pucek, Tatiana Nechaeva et autres

A long, narrow, relativistic charged particle bunch propagating in plasma is subject to the self-modulation (SM) instability. We show that SM of a proton bunch can be seeded by the wakefields driven by a preceding electron bunch. SM timing reproducibility and control …

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