Concept of emittance exchange using two bending magnets and two transverse deflectors at CLEAR (CERN Linear Accelerator for Research)

Moore, Ciara Marie; Malyzhenkov, Alexander; Aksoy, Avni; Corsini, Roberto; Farabolini, Wilfrid; Gamba, Davide; Gilardi, Antonio; Leygonie, Johan Pierre; Simonsson, Sara Jenny; Skilling, Katie; Tangari, Giacomo; Tus, Traian; Wang, Sabrina

doi:10.18429/JACoW-LINAC2026-MOPO002

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URL	https://doi.org/10.18429/JACoW-LINAC2026-MOPO002
Title	Concept of emittance exchange using two bending magnets and two transverse deflectors at CLEAR (CERN Linear Accelerator for Research)
Authors	C. Moore University of Exeter, European Organization for Nuclear Research A. Malyzhenkov European Organization for Nuclear Research, Swiss International Institute A. Aksoy, R. Corsini, W. Farabolini, D. Gamba, A. Gilardi European Organization for Nuclear Research J. Leygonie Institut Gustave Roussy, European Organization for Nuclear Research S. Simonsson Lund University, European Organization for Nuclear Research K. Skilling, T. Tus University of Oxford G. Tangari Sapienza University of Rome, European Organization for Nuclear Research S. Wang European Organization for Nuclear Research, University of Oxford
Abstract	Second beam line has recently been installed and commissioned at CLEAR (CERN Linear Accelerator for Research). The line begins with a switchyard consisting of two dipole bending magnets that offset the beam from its original path, along with quadrupoles and sextupoles placed between the bends to close the first- and second-order dispersion, respectively. In this work, based on analytical methods and numerical simulations, we present a concept for an emittance exchange scheme realized using the switchyard. We show that transverse-to-longitudinal phase space exchange can be achieved by activating a transverse deflector located upstream, together with an additional deflector downstream (the only missing element). Furthermore, we demonstrate that such a scheme enables advanced beam phase-space tailoring and expands the CLEAR beam parameters beyond its nominal operational range.
Paper	download: MOPO002.pdf
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Conference	33rd International Linear Accelerator Conference (LINAC'26)
Series
Location	Daejeon, Korea
Date	16-21 Aug 2026
Publisher	JACoW Publishing, Geneva, Switzerland
Editorial Board	Dong-Eon Kim (Pohang Accelerator Laboratory), Jangwon Kwon (Institute for Basic Science), Yujung Ahn (Institute for Basic Science), Jae-yu Lee (Pohang Accelerator Laboratory), Lin Bian (Institute of High Energy Physics, Chinese Academy of Sciences), Thakonwat Chanwattana (Synchrotron Light Research Institute), Yung-Sen Cheng (National Synchrotron Radiation Research Center), Manuel J. Gutiérrez (IFMIF-DONES España), Maurizio Montis (Istituto Nazionale di Fisica Nucleare), Volker RW Schaa (GSI Helmholtzzentrum für Schwerionenforschung GmbH), Akito Uchiyama (RIKEN Nishina Center)
Online ISBN	978-3-95450-275-2
Online ISSN	2226-0366
Received	13 August 2026
Revised	20 August 2026
Accepted	20 August 2026
Issued	23 October 2026
DOI	10.18429/JACoW-LINAC2026-MOPO002
Pages	35-37
Copyright	Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI.