Highly efficient angularly resolving x-ray spectrometer optimized for absorption measurements with collimated sources

Šmíd, Michal; González, I. Gallardo; Ekerfelt, Henrik; Svensson, Jonas Björklund; Hansson, Martin; Wood, Jonathan; Persson, Anders; Mangles, S. P. D.; Lundh, Olle; Falk, K.

doi:10.1063/1.4986464

Cited by 15 publications

(6 citation statements)

References 19 publications

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“…Betatron emission from LWFAs has been measured using a number of techniques. It can be measured directly after its parent beam has been removed [4], but may also be extracted and measured indirectly via a highly oriented pyrolytic graphite (HOPG) crystal [16]. The spectrum can be reconstructed with an x-ray charge-coupled device (CCD) in single-photon counting mode, or with a set of Ross filters.…”

Section: Diagnostic Considerationsmentioning

confidence: 99%

Betatron radiation diagnostics for AWAKE Run 2

Williamson

Xia

Gessner

et al. 2020

Nuclear Instruments and Methods in Physics Research Section A:

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This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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Section: Diagnostic Considerationsmentioning

confidence: 99%

Betatron radiation diagnostics for AWAKE Run 2

Williamson

Xia

Gessner

et al. 2020

Nuclear Instruments and Methods in Physics Research Section A:

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“…With femtosecond laser pulses, betatron x-ray radiation has been used for x-ray phase contrast imaging of biological objects [53][54][55][56], x-ray absorption spectroscopy [57], and to radiograph laser-driven shocks in metallic samples [58]. We believe that similar experiments could be undertaken with the source driven by picosecond laser pulses, except for x-ray phase contrast imaging due to the larger source size.…”

Section: Examples Of Possible Application Experimentsmentioning

confidence: 99%

Betatron x-ray radiation in the self-modulated laser wakefield acceleration regime: prospects for a novel probe at large scale laser facilities

et al. 2018

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This paper presents an experimental and theoretical study of betatron x-ray radiation from laser wakefield acceleration in the self-modulated regime. Our experiments use picosecond duration laser pulses up to 150 J, for plasmas with electronic densities on the order of 1019 cm−3. In the self-modulated regime, electrons accelerated in the wake of the laser pulse are subject to both the longitudinal plasma and transverse laser electrical fields. As a result, they undergo oscillations and radiate a synchrotron-like spectrum. In our experimental configuration, electrons accelerated up to about 300 MeV, as well as betatron x-ray spectra with energies of 10 s of keV and photon fluxes between 108–1010 photons/eV/Sr are reported. Our experiments open the prospect of using betatron x-ray radiation for applications, and the source could be competitive with current x-ray backlighting methods on multi-kilojoule laser systems used for high energy density or fusion sciences.

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“…Afterwards, the electrons are diagnosed by (e) a dipole and four scintillating screens that resolve the electron charge, energy, and angular distribution in the laser polarization direction. After this, we diagnose x-rays with a x-ray scintillator (h), pixel counting x-ray camera [30] (i), and HOPG spectrometer [31] (j). Our relative time delay calibrations are conducted at (f) through spectral interferometry and our absolute time delay calibrations are conducted at (g) with a separate spectral interferometer.…”

Section: Introductionmentioning

confidence: 99%

Two-Pulse Direct Laser Acceleration in a Laser-Driven Plasma Accelerator

Bowers¹,

Laberge²,

Koehler³

et al. 2021

Preprint

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We present methods and preliminary observations of two pulse Direct Laser Acceleration in a Laser-Driven Plasma Accelerator. This acceleration mechanism uses a second co-propagating laser pulse to overlap and further accelerate electrons in a wakefield bubble, increasing energy at the cost of emittance when compared to traditional laser wakefield acceleration (LWFA). To this end, we introduce a method of femtosecond scale control of time delay between two co-propagating pulses. We show energy enhancement when the separation between the two pulses approaches the bubble radius.

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Highly efficient angularly resolving x-ray spectrometer optimized for absorption measurements with collimated sources

Cited by 15 publications

References 19 publications

Betatron radiation diagnostics for AWAKE Run 2

Betatron radiation diagnostics for AWAKE Run 2

Betatron x-ray radiation in the self-modulated laser wakefield acceleration regime: prospects for a novel probe at large scale laser facilities

Two-Pulse Direct Laser Acceleration in a Laser-Driven Plasma Accelerator

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