IPAC2021 - List of Authors (Farabolini, W.)

Paper	Title	Page
WEPAB043	Consolidation and Future Upgrades to the CLEAR User Facility at CERN	2700
	L.A. Dyks, P. Korysko Oxford University, Physics Department, Oxford, Oxon, United Kingdom P. Burrows JAI, Oxford, United Kingdom R. Corsini, S. Curt, W. Farabolini, D. Gamba, L. Garolfi, A. Gilardi, E. Granados, G. McMonagle, H. Panuganti CERN, Meyrin, Switzerland W. Farabolini CEA-DRF-IRFU, France A. Gilardi University of Napoli Federico II, Napoli, Italy K.N. Sjobak University of Oslo, Oslo, Norway
	The CERN Linear Electron Accelerator for Research (CLEAR) at CERN has been operating since 2017 as a dedicated user facility providing beams for a varied range of experiments. CLEAR consists of a 20 m long linear accelerator (linac), able to produce beams from a Cs₂Te photocathode and accelerate them to energies of between 60 MeV and 220 MeV. Following the linac, an experimental beamline is located, in which irradiation tests, wakefield and impedances tudies, plasma lens experiments, beam diagnostics development, and terahertz (THz) emission studies, are performed. In this paper, we present recent upgrades to the entire beamline, as well as the design of future upgrades, such as a dogleg section connecting to an additional proposed experimental beamline. The gain in performance due to these upgrades is presented with a full range of available beam properties documented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB043
About •	paper received ※ 18 May 2021 paper accepted ※ 24 June 2021 issue date ※ 19 August 2021
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WEPAB044	Status of VHEE Radiotherapy Related Studies at the CLEAR User Facility at CERN	2704
	R. Corsini, W. Farabolini, A. Gilardi CERN, Geneva, Switzerland L.A. Dyks, P. Korysko Oxford University, Physics Department, Oxford, Oxon, United Kingdom W. Farabolini CEA-DRF-IRFU, France A. Gilardi University of Napoli Federico II, Napoli, Italy K.N. Sjobak University of Oslo, Oslo, Norway
	Despite the increase in interest in using Very High Energy Electron (VHEE) beams for cancer radiotherapy many unanswered questions in its development remain. The use of test facilities will be an essential tool used to solve these issues. The 200 MeV electron beam from the CERN Linear Accelerator for Research (CLEAR) has been used extensively, in collaboration with several research institutes, to perform dosimetry studies and explore potential applications of VHEE beams to radiotherapy, including the exploitation of the so called FLASH effect. In this paper, we present an overview of past studies with emphasis on the more recent results. We describe methods, techniques and equipment developed at CERN in this framework, and give an outlook on future activities.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB044
About •	paper received ※ 18 May 2021 paper accepted ※ 23 June 2021 issue date ※ 27 August 2021
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FRXC02	Non Invasive Bunch Length Measurements Exploiting Cherenkov Diffraction Radiation
	S. Mazzoni, M. Bergamaschi, R. Corsini, A. Curcio, W. Farabolini, D. Gamba, L. Garolfi, A. Gilardi, R. Kieffer, M. Krupa, T. Lefèvre, E. Senes, M. Wendt CERN, Geneva, Switzerland A. Curcio NSRC SOLARIS, Kraków, Poland C. Davut, G.X. Xia UMAN, Manchester, United Kingdom W. Farabolini CEA-DRF-IRFU, France K.V. Fedorov, P. Karataev, K. Lekomtsev, C. Pakuza JAI, Oxford, United Kingdom K.V. Fedorov, A. Potylitsyn TPU, Tomsk, Russia J. Gardelle CEA, LE BARP cedex, France P. Karataev Royal Holloway, University of London, Surrey, United Kingdom T.H. Pacey, Y.M. Saveliev STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom A. Schloegelhofer TU Vienna, Wien, Austria E. Senes Oxford University, Physics Department, Oxford, Oxon, United Kingdom
	Cherenkov Diffraction Radiation (ChDR) refers to the emission of broadband electromagnetic radiation which occurs when a charged particle propagates at relativistic speed in the vicinity of a dielectric material. At variance with the better-known Cherenkov radiation, ChDR is a non-invasive technique, that is the particle beam does not impinge on the dielectric radiator. ChDR also possesses other interesting features like a relatively high light yield, a broadband spectrum of emission and the emission at a relatively large angle with respect to the beam trajectory. Due to its potential, CERN initiated over the last few years several studies on ChDR-based diagnostics techniques. In this contribution I will focus on the exploitation of ChDR for non-invasive bunch length measurement, from proof of principle tests performed at the CLEAR facility at CERN and CLARA at Daresbury laboratory to current developments for experiments and facilities such as AWAKE and FCC
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WEPAB021	Development and Testing of a Cherenkov Beam Loss Monitor in CLEAR Facility	2640
	S. Benitez Berrocal, E. Effinger, W. Farabolini, A. Gilardi, P. Korysko, E. Lima, B. Salvachua, W. Viganò CERN, Meyrin, Switzerland P. Lane University of Huddersfield, Huddersfield, United Kingdom
	Beam Loss Monitors are fundamental diagnostic systems in particle accelerators. Beam losses are measured by a wide range of detectors with excellent results; most of these devices are used to measure local beam losses. However, in some accelerators there is the need to measure beam losses continuously localized over longer distances i.e., several tens of meters. For this reason, a beam loss detector based on long optical fibres is now under study. As part of the design, several simulations, comparing different possible detection scenarios, have been performed in FLUKA and bench-marked with experimental data. An experimental campaign was performed with an electron beam in the CERN Linear Electron Accelerator for Research (CLEAR) in November 2020. The light emitted from the optical fibre was captured using Silicon Photo-Multipliers (SiPM) coupled at each fibre’s end. In this poster, the first results of a beam loss detector based on the capture of Cherenkov photons generated by charged particles inside multimode silica fibres are presented.
	Poster WEPAB021 [0.724 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB021
About •	paper received ※ 18 May 2021 paper accepted ※ 21 June 2021 issue date ※ 31 August 2021
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Consolidation and Future Upgrades to the CLEAR User Facility at CERN

2700

L.A. Dyks, P. Korysko
Oxford University, Physics Department, Oxford, Oxon, United Kingdom
P. Burrows
JAI, Oxford, United Kingdom
R. Corsini, S. Curt, W. Farabolini, D. Gamba, L. Garolfi, A. Gilardi, E. Granados, G. McMonagle, H. Panuganti
CERN, Meyrin, Switzerland
W. Farabolini
CEA-DRF-IRFU, France
A. Gilardi
University of Napoli Federico II, Napoli, Italy
K.N. Sjobak
University of Oslo, Oslo, Norway

The CERN Linear Electron Accelerator for Research (CLEAR) at CERN has been operating since 2017 as a dedicated user facility providing beams for a varied range of experiments. CLEAR consists of a 20 m long linear accelerator (linac), able to produce beams from a Cs₂Te photocathode and accelerate them to energies of between 60 MeV and 220 MeV. Following the linac, an experimental beamline is located, in which irradiation tests, wakefield and impedances tudies, plasma lens experiments, beam diagnostics development, and terahertz (THz) emission studies, are performed. In this paper, we present recent upgrades to the entire beamline, as well as the design of future upgrades, such as a dogleg section connecting to an additional proposed experimental beamline. The gain in performance due to these upgrades is presented with a full range of available beam properties documented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB043

About •

paper received ※ 18 May 2021 paper accepted ※ 24 June 2021 issue date ※ 19 August 2021

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPAB044

Status of VHEE Radiotherapy Related Studies at the CLEAR User Facility at CERN

2704

R. Corsini, W. Farabolini, A. Gilardi
CERN, Geneva, Switzerland
L.A. Dyks, P. Korysko
Oxford University, Physics Department, Oxford, Oxon, United Kingdom
W. Farabolini
CEA-DRF-IRFU, France
A. Gilardi
University of Napoli Federico II, Napoli, Italy
K.N. Sjobak
University of Oslo, Oslo, Norway

Despite the increase in interest in using Very High Energy Electron (VHEE) beams for cancer radiotherapy many unanswered questions in its development remain. The use of test facilities will be an essential tool used to solve these issues. The 200 MeV electron beam from the CERN Linear Accelerator for Research (CLEAR) has been used extensively, in collaboration with several research institutes, to perform dosimetry studies and explore potential applications of VHEE beams to radiotherapy, including the exploitation of the so called FLASH effect. In this paper, we present an overview of past studies with emphasis on the more recent results. We describe methods, techniques and equipment developed at CERN in this framework, and give an outlook on future activities.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB044

About •

paper received ※ 18 May 2021 paper accepted ※ 23 June 2021 issue date ※ 27 August 2021

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

FRXC02

Non Invasive Bunch Length Measurements Exploiting Cherenkov Diffraction Radiation

S. Mazzoni, M. Bergamaschi, R. Corsini, A. Curcio, W. Farabolini, D. Gamba, L. Garolfi, A. Gilardi, R. Kieffer, M. Krupa, T. Lefèvre, E. Senes, M. Wendt
CERN, Geneva, Switzerland
A. Curcio
NSRC SOLARIS, Kraków, Poland
C. Davut, G.X. Xia
UMAN, Manchester, United Kingdom
W. Farabolini
CEA-DRF-IRFU, France
K.V. Fedorov, P. Karataev, K. Lekomtsev, C. Pakuza
JAI, Oxford, United Kingdom
K.V. Fedorov, A. Potylitsyn
TPU, Tomsk, Russia
J. Gardelle
CEA, LE BARP cedex, France
P. Karataev
Royal Holloway, University of London, Surrey, United Kingdom
T.H. Pacey, Y.M. Saveliev
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
A. Schloegelhofer
TU Vienna, Wien, Austria
E. Senes
Oxford University, Physics Department, Oxford, Oxon, United Kingdom

Cherenkov Diffraction Radiation (ChDR) refers to the emission of broadband electromagnetic radiation which occurs when a charged particle propagates at relativistic speed in the vicinity of a dielectric material. At variance with the better-known Cherenkov radiation, ChDR is a non-invasive technique, that is the particle beam does not impinge on the dielectric radiator. ChDR also possesses other interesting features like a relatively high light yield, a broadband spectrum of emission and the emission at a relatively large angle with respect to the beam trajectory. Due to its potential, CERN initiated over the last few years several studies on ChDR-based diagnostics techniques. In this contribution I will focus on the exploitation of ChDR for non-invasive bunch length measurement, from proof of principle tests performed at the CLEAR facility at CERN and CLARA at Daresbury laboratory to current developments for experiments and facilities such as AWAKE and FCC

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPAB021

Development and Testing of a Cherenkov Beam Loss Monitor in CLEAR Facility

2640

S. Benitez Berrocal, E. Effinger, W. Farabolini, A. Gilardi, P. Korysko, E. Lima, B. Salvachua, W. Viganò
CERN, Meyrin, Switzerland
P. Lane
University of Huddersfield, Huddersfield, United Kingdom

Beam Loss Monitors are fundamental diagnostic systems in particle accelerators. Beam losses are measured by a wide range of detectors with excellent results; most of these devices are used to measure local beam losses. However, in some accelerators there is the need to measure beam losses continuously localized over longer distances i.e., several tens of meters. For this reason, a beam loss detector based on long optical fibres is now under study. As part of the design, several simulations, comparing different possible detection scenarios, have been performed in FLUKA and bench-marked with experimental data. An experimental campaign was performed with an electron beam in the CERN Linear Electron Accelerator for Research (CLEAR) in November 2020. The light emitted from the optical fibre was captured using Silicon Photo-Multipliers (SiPM) coupled at each fibre’s end. In this poster, the first results of a beam loss detector based on the capture of Cherenkov photons generated by charged particles inside multimode silica fibres are presented.

Poster WEPAB021 [0.724 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB021

About •

paper received ※ 18 May 2021 paper accepted ※ 21 June 2021 issue date ※ 31 August 2021

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)