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A magnetic spectrometer to measure electron bunches accelerated at AWAKE.

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Title: A magnetic spectrometer to measure electron bunches accelerated at AWAKE.
Authors: Bauche, J.1 (AUTHOR), Biskup, B.1,2 (AUTHOR), Cascella, M.3 (AUTHOR), Chappell, J.3 (AUTHOR), Chritin, N.1 (AUTHOR), Cooke, D.3 (AUTHOR), Deacon, L.3 (AUTHOR), Deliege, Q.1 (AUTHOR), Gorgisyan, I.1 (AUTHOR), Hansen, J.1 (AUTHOR), Jolly, S.3 (AUTHOR), Keeble, F.1,3 (AUTHOR) fearghus.keeble.11@ucl.ac.uk, La Penna, P.4 (AUTHOR), Mazzoni, S.1 (AUTHOR), Medina Godoy, D.1 (AUTHOR), Petrenko, A.1 (AUTHOR), Quattri, M.4 (AUTHOR), Schneider, T.1 (AUTHOR), Sherwood, P.3 (AUTHOR), Vorozhtsov, A.1 (AUTHOR)
Source: Nuclear Instruments & Methods in Physics Research Section A. Oct2019, Vol. 940, p103-108. 6p.
Subjects: European Organization for Nuclear Research, Particle beam bunching, Magnetic spectrometer, Electron distribution, CCD cameras, Plasma acceleration, Superconducting magnets
Abstract: A magnetic spectrometer has been developed for the AWAKE experiment at CERN in order to measure the energy distribution of bunches of electrons accelerated in wakefields generated by proton bunches in plasma. AWAKE is a proof-of-principle experiment for proton-driven plasma wakefield acceleration, using proton bunches from the SPS. Electron bunches are accelerated to O (1 GeV) in a rubidium plasma cell and then separated from the proton bunches via a dipole magnet. The dipole magnet also induces an energy-dependent spatial horizontal spread on the electron bunch which then impacts on a scintillator screen. The scintillation photons emitted are transported via three highly-reflective mirrors to an intensified CCD camera, housed in a dark room, which passes the images to the CERN controls system for storage and further analysis. Given the known magnetic field and determination of the efficiencies of the system, the spatial spread of the scintillation photons can be converted to an electron energy distribution. A lamp attached on a rail in front of the scintillator is used to calibrate the optical system, with calibration of the scintillator screen's response to electrons carried out at the CLEAR facility at CERN. In this article, the design of the AWAKE spectrometer is presented, along with the calibrations carried out and expected performance such that the energy distribution of accelerated electrons can be measured. [ABSTRACT FROM AUTHOR]
Copyright of Nuclear Instruments & Methods in Physics Research Section A is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 137431973
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: A magnetic spectrometer to measure electron bunches accelerated at AWAKE.
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  Data: <searchLink fieldCode="AR" term="%22Bauche%2C+J%2E%22">Bauche, J.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Biskup%2C+B%2E%22">Biskup, B.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cascella%2C+M%2E%22">Cascella, M.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chappell%2C+J%2E%22">Chappell, J.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chritin%2C+N%2E%22">Chritin, N.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cooke%2C+D%2E%22">Cooke, D.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Deacon%2C+L%2E%22">Deacon, L.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Deliege%2C+Q%2E%22">Deliege, Q.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gorgisyan%2C+I%2E%22">Gorgisyan, I.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hansen%2C+J%2E%22">Hansen, J.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jolly%2C+S%2E%22">Jolly, S.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Keeble%2C+F%2E%22">Keeble, F.</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<i> fearghus.keeble.11@ucl.ac.uk</i><br /><searchLink fieldCode="AR" term="%22La+Penna%2C+P%2E%22">La Penna, P.</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mazzoni%2C+S%2E%22">Mazzoni, S.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Medina+Godoy%2C+D%2E%22">Medina Godoy, D.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Petrenko%2C+A%2E%22">Petrenko, A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Quattri%2C+M%2E%22">Quattri, M.</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Schneider%2C+T%2E%22">Schneider, T.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sherwood%2C+P%2E%22">Sherwood, P.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Vorozhtsov%2C+A%2E%22">Vorozhtsov, A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Nuclear+Instruments+%26+Methods+in+Physics+Research+Section+A%22">Nuclear Instruments & Methods in Physics Research Section A</searchLink>. Oct2019, Vol. 940, p103-108. 6p.
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  Data: A magnetic spectrometer has been developed for the AWAKE experiment at CERN in order to measure the energy distribution of bunches of electrons accelerated in wakefields generated by proton bunches in plasma. AWAKE is a proof-of-principle experiment for proton-driven plasma wakefield acceleration, using proton bunches from the SPS. Electron bunches are accelerated to O (1 GeV) in a rubidium plasma cell and then separated from the proton bunches via a dipole magnet. The dipole magnet also induces an energy-dependent spatial horizontal spread on the electron bunch which then impacts on a scintillator screen. The scintillation photons emitted are transported via three highly-reflective mirrors to an intensified CCD camera, housed in a dark room, which passes the images to the CERN controls system for storage and further analysis. Given the known magnetic field and determination of the efficiencies of the system, the spatial spread of the scintillation photons can be converted to an electron energy distribution. A lamp attached on a rail in front of the scintillator is used to calibrate the optical system, with calibration of the scintillator screen's response to electrons carried out at the CLEAR facility at CERN. In this article, the design of the AWAKE spectrometer is presented, along with the calibrations carried out and expected performance such that the energy distribution of accelerated electrons can be measured. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Nuclear Instruments & Methods in Physics Research Section A is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.nima.2019.05.067
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      – Code: eng
        Text: English
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        Type: general
      – SubjectFull: Particle beam bunching
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      – SubjectFull: Magnetic spectrometer
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      – SubjectFull: Electron distribution
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      – SubjectFull: CCD cameras
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      – SubjectFull: Plasma acceleration
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      – SubjectFull: Superconducting magnets
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