Betatron radiation diagnostics for AWAKE Run 2

B. Williamson; G. Xia; S. Gessner; A. Petrenko; J. Farmer; A. Pukhov

doi:10.1016/j.nima.2020.164076

Betatron radiation diagnostics for AWAKE Run 2

B. Williamson, G. Xia, S. Gessner, A. Petrenko, J. Farmer, A. Pukhov

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Abstract

AWAKE Run 2 aims to preserve the transverse normalised emittance of an externally injected electron beam throughout acceleration, requiring a new diagnostic to measure the beam emittance after the accelerating plasma stage. Spectroscopy of the betatron emission from the electron beam could be suitable for this case. The method of trace-space reconstruction from a measured betatron spectrum is described via a simplified analytical model in order to assess its suitability the AWAKE experiment. The expected betatron emission from witness electrons at AWAKE is characterised using 3D quasi-static PIC simulations, revealing a measurable quantity of UV to soft x-ray emission. Practical challenges for the measurement are discussed.

Original language	English
Pages (from-to)	164076
Journal	Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Early online date	4 May 2020
DOIs	https://doi.org/10.1016/j.nima.2020.164076
Publication status	Published - 2020

Keywords

Accelerators
Beam driven plasma accelerators
Beam diagnostics
Radiation sources

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10.1016/j.nima.2020.164076

1-s2.0-S0168900220305015-main-2Accepted author manuscript, 1.26 MB

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title = "Betatron radiation diagnostics for AWAKE Run 2",

abstract = "AWAKE Run 2 aims to preserve the transverse normalised emittance of an externally injected electron beam throughout acceleration, requiring a new diagnostic to measure the beam emittance after the accelerating plasma stage. Spectroscopy of the betatron emission from the electron beam could be suitable for this case. The method of trace-space reconstruction from a measured betatron spectrum is described via a simplified analytical model in order to assess its suitability the AWAKE experiment. The expected betatron emission from witness electrons at AWAKE is characterised using 3D quasi-static PIC simulations, revealing a measurable quantity of UV to soft x-ray emission. Practical challenges for the measurement are discussed.",

keywords = "Accelerators, Beam driven plasma accelerators, Beam diagnostics, Radiation sources",

author = "B. Williamson and G. Xia and S. Gessner and A. Petrenko and J. Farmer and A. Pukhov",

year = "2020",

doi = "10.1016/j.nima.2020.164076",

language = "English",

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journal = "Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",

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T1 - Betatron radiation diagnostics for AWAKE Run 2

AU - Williamson, B.

AU - Xia, G.

AU - Gessner, S.

AU - Petrenko, A.

AU - Farmer, J.

AU - Pukhov, A.

PY - 2020

Y1 - 2020

N2 - AWAKE Run 2 aims to preserve the transverse normalised emittance of an externally injected electron beam throughout acceleration, requiring a new diagnostic to measure the beam emittance after the accelerating plasma stage. Spectroscopy of the betatron emission from the electron beam could be suitable for this case. The method of trace-space reconstruction from a measured betatron spectrum is described via a simplified analytical model in order to assess its suitability the AWAKE experiment. The expected betatron emission from witness electrons at AWAKE is characterised using 3D quasi-static PIC simulations, revealing a measurable quantity of UV to soft x-ray emission. Practical challenges for the measurement are discussed.

AB - AWAKE Run 2 aims to preserve the transverse normalised emittance of an externally injected electron beam throughout acceleration, requiring a new diagnostic to measure the beam emittance after the accelerating plasma stage. Spectroscopy of the betatron emission from the electron beam could be suitable for this case. The method of trace-space reconstruction from a measured betatron spectrum is described via a simplified analytical model in order to assess its suitability the AWAKE experiment. The expected betatron emission from witness electrons at AWAKE is characterised using 3D quasi-static PIC simulations, revealing a measurable quantity of UV to soft x-ray emission. Practical challenges for the measurement are discussed.

KW - Accelerators

KW - Beam driven plasma accelerators

KW - Beam diagnostics

KW - Radiation sources

U2 - 10.1016/j.nima.2020.164076

DO - 10.1016/j.nima.2020.164076

M3 - Article

SN - 0168-9002

SP - 164076

JO - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

ER -

Betatron radiation diagnostics for AWAKE Run 2

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Keywords

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