Angularly resolved characterization of ion beams from laser-ultrathin foil interactions

Scullion, C.; Doria, D.; Romagnani, L.; Ahmed, H.; Alejo, A.; Ettlinger, Oliver C.; Gray, R. J.; Green, J.; Hicks, George; Jung, Daniel; Naughton, K.; Padda, H.; Põder, Kristjan; Scott, Graeme; Symes, D. R.; McKenna, P.; Najmudin, Z.; Neely, D.; Zepf, Matthew; Borghesi, M.

doi:10.1088/1748-0221/11/09/c09020

Cited by 8 publications

(8 citation statements)

References 40 publications

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“…upv.es films which allow for highly resolved analysis of the beam profile 8,9 and CR-39 samples, 10,11 the latter being especially useful at small particle densities and for a clear separation between protons and ions from electrons and photons. CR-39 [polyallyl-diglycol-carbonate (PADC), C 12 H 18 O 7 ] has been applied in different ways for the detection and energy measurement of laser-accelerated protons.…”

Section: Introductionmentioning

confidence: 99%

“…Multi-MeV protons can be absorbed in CR-39 stacks, possibly with additional, passive materials in front, in order to obtain their energies from the range and corresponding energy loss. 9,12,13 Jeong et al 14 recently described a method to analyze the pit sizes on the front and back sides of CR-39 samples to extend the proton energy range beyond 10 MeV. For protons between 0.9 and 2.5 MeV, a method based on multiple etching has been proposed recently.…”

Section: Introductionmentioning

confidence: 99%

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Spectral characterization of laser-accelerated protons with CR-39 nuclear track detector

Seimetz

Bellido

García

et al. 2018

Review of Scientific Instruments

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CR-39 nuclear track material is frequently used for the detection of protons accelerated in laser-plasma interactions. The measurement of track densities allows for determination of particle angular distributions, and information on the kinetic energy can be obtained by the use of passive absorbers. We present a precise method of measuring spectral distributions of laser-accelerated protons in a single etching and analysis process. We make use of a one-to-one relation between proton energy and track size and present a precise calibration based on monoenergetic particle beams. While this relation is limited to proton energies below 1 MeV, we show that the range of spectral measurements can be significantly extended by simultaneous use of absorbers of suitable thicknesses. Examples from laser-plasma interactions are presented, and quantitative results on proton energies and particle numbers are compared to those obtained from a time-of-flight detector. The spectrum end points of continuous energy distributions have been determined with both detector types and coincide within 50-100 keV.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spectral characterization of laser-accelerated protons with CR-39 nuclear track detector

Seimetz

Bellido

García

et al. 2018

Review of Scientific Instruments

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“…Deflections of particles are not directly detected; rather, the proton fluence is recorded on a detector such as CR-39 or radiochromic film [19]. This quantity is increased in regions of the image plane where proton velocities converge and decreased in regions where they diverge, relative to the flat-field fluence which would be measured in the absence of deflections.…”

Section: Proton Radiographymentioning

confidence: 99%

“…After exiting the plasma, the beam propagates over a distance before impinging on a detector screen. CR-39 and radiochromic film are commonly used as proton detectors and each has its own advantages and disadvantages [19].…”

Section: Introductionmentioning

confidence: 99%

Methods for extremely sparse-angle proton tomography

et al. 2021

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Proton radiography is a widely fielded diagnostic used to measure magnetic structures in plasma. The deflection of protons with multi-MeV kinetic energy by the magnetic fields is used to infer their path-integrated field strength. Here the use of tomographic methods is proposed for the first time to lift the degeneracy inherent in these path-integrated measurements, allowing full reconstruction of spatially resolved magnetic field structures in three dimensions. Two techniques are proposed which improve the performance of tomographic reconstruction algorithms in cases with severely limited numbers of available probe beams, as is the case in laser-plasma interaction experiments where the probes are created by short, high-power laser pulse irradiation of secondary foil targets. A new configuration allowing production of more proton beams from a single short laser pulse is also presented and proposed for use in tandem with these analytical advancements.

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“…Laser-based ion acceleration experiments routinely utilize absolutely calibrated detectors such as radiochromic film (RCF), CR-39 (Columbia Resin 39, a solid-state track detector) and Image plates (IP), detailed in [6]. These are used either in a stack arrangement [7] or, in the case of IP or CR-39, in the detection plane of a Thomson Parabola Spectrometer (TPS). Calibrations for these detectors exist up to 10s of MeV for protons and heavier ions [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Absolute calibration of microchannel plate detector for carbon ions up to 250 MeV

et al. 2019

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Rutherford Appleton Laboratory U.K. for investigating novel ion acceleration regimes employing ultrathin foil targets. An online detection system consisting of a Thomson Parabola Spectrometer (TPS) -Microchannel Plate (MCP) was used to determine maximum energies and spectra per species. The response of the MCP was calibrated for absolute particle (carbon) number per steradian using CR-39 up to 21 MeV/nucleon. This calibration provides a useful reference for a widely used diagnostic arrangement. K: Ion sources (positive ions, negative ions, electron cyclotron resonance (ECR), electron beam (EBIS)); Plasma diagnostics -charged-particle spectroscopy 1Corresponding author.

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Angularly resolved characterization of ion beams from laser-ultrathin foil interactions

Cited by 8 publications

References 40 publications

Spectral characterization of laser-accelerated protons with CR-39 nuclear track detector

Spectral characterization of laser-accelerated protons with CR-39 nuclear track detector

Methods for extremely sparse-angle proton tomography

Absolute calibration of microchannel plate detector for carbon ions up to 250 MeV

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