Response of CR-39 to 0.9–2.5 MeV protons for KOH and NaOH etching solutions

Bahrami, Farbod; Mianji, Fereidoun A.; Faghihi, Reza; Taheri, M.; Ansarinejad, Abdolkazem

doi:10.1016/j.nima.2016.01.015

Cited by 10 publications

(3 citation statements)

References 14 publications

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“…In this direction, solid-state nuclear track detectors, CR-39 type, have proved to be a reliable diagnostic tool for the characterization of the energy distribution of alpha particles generated by the laser-driven proton-boron fusion. In fact, they are extremely sensitive to a single incident particle and are not afected by the intense electromagnetic noise produced in the laser-target interaction [18].…”

Section: Introductionmentioning

confidence: 99%

A Methodology for the Discrimination of Alpha Particles from Other Ions in Laser-Driven Proton-Boron Reactions Using CR-39 Detectors Coupled in a Thomson Parabola Spectrometer

et al. 2023

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Solid-state nuclear track detectors (CR-39 type) are frequently used for the detection of ions accelerated by laser-plasma interaction because they are sensitive to each single particle. To the present day, CR-39 detectors are the main diagnostics in experiments focused on laser-driven proton-boron (p11B) fusion reactions to detect alpha particles, which are the main products of such a nuclear reaction, and to reconstruct their energy distribution. However, the acceleration of multispecies ions in the laser-generated plasma makes this spectroscopic method complex and often does not allow to unambiguously discriminate the alpha particles generated from p11B fusion events from the laser-driven ions. In this experimental work, performed at the PALS laser facility (600 J, 300 ps, laser intensity 1016 W/cm2), CR-39 detectors were used as main detectors for the angular distribution of the produced alpha particles during a p11B fusion dedicated experimental campaign. Additionally, a CR-39 detector was set inside a Thomson Parabola (TP) spectrometer with the aim to calibrate the CR-39 response for low energetic laser-driven ions originating from the plasma in the given experimental conditions. The detected ion energies were ranging from hundreds of keV to a few MeV, and the ion track diameters were measured for etching times up to 9 hours. The goal of the test was the evaluation of the detectors’ ability to discriminate the alpha particles from the aforementioned ions. Within this study, the calibration curves for protons and silicon low energy ions are accomplished, the overlapping of the proton tracks and alpha particles is verified, and a methodology to avoid this problem is realized.

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Section: Introductionmentioning

confidence: 99%

A Methodology for the Discrimination of Alpha Particles from Other Ions in Laser-Driven Proton-Boron Reactions Using CR-39 Detectors Coupled in a Thomson Parabola Spectrometer

et al. 2023

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“…For protons between 0.9 and 2.5 MeV, a method based on multiple etching has been proposed recently. 15 However, for practical purposes, a single processing cycle (etching and track analysis) of CR-39 samples is preferred, especially for elevated numbers of samples. The main objective of the present work is to determine particle energies directly from the track sizes.…”

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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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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“…Alternatively, differences in grey values resulting from the depth of pits can resolve ambiguities between tracks of identical diameters [15]. The energy-dependent evolution of track diameters between 0.9 and 2.5 MeV can be utilised in a multistage etching process [16]. Protons beyond ∼ 10 MeV penetrate through CR-39 plates of 1 mm thickness and may produce tracks on the rear side [17] or in subsequent layers of CR-39 stacks [18,19].…”

mentioning

confidence: 99%

PADC nuclear track detector for ion spectroscopy in laser-plasma acceleration

et al. 2020

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The transparent polymer polyallyl-diglycol-carbonate (PADC), also known as CR-39, is widely used as detector for heavy charged particles at low fluence.It allows for detection of single protons and ions via formation of microscopic tracks after etching in NaOH or KOH solutions. PADC combines a high sensitivity and high specificity with inertness towards electromagnetic noise. Present fields of application include laser-ion acceleration, inertial confinement fusion, radiobiological studies with cell cultures, and dosimetry of nuclear fragments in particle therapy. These require precise knowledge of the energy-dependent response of PADC to different ion species. We present calibration data for a new type of detector material, Radosys RS39, to protons (0.2-3 MeV) and carbon ions (0.6-12 MeV). RS39 is less sensitive to protons than other types of PADC.Its response to carbon ions, however, is similar to other materials. Our data indicate that RS39 allows for measuring carbon ion energies up to 10 MeV only from the track diameters. In addition, it can be used for discrimination between protons and carbon ions in a single etching process.

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Response of CR-39 to 0.9–2.5 MeV protons for KOH and NaOH etching solutions

Cited by 10 publications

References 14 publications

A Methodology for the Discrimination of Alpha Particles from Other Ions in Laser-Driven Proton-Boron Reactions Using CR-39 Detectors Coupled in a Thomson Parabola Spectrometer

A Methodology for the Discrimination of Alpha Particles from Other Ions in Laser-Driven Proton-Boron Reactions Using CR-39 Detectors Coupled in a Thomson Parabola Spectrometer

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

PADC nuclear track detector for ion spectroscopy in laser-plasma acceleration

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