Incoherent Thomson scattering system for PHAse space MApping (PHASMA) experiment

Peiyun Shi; Prabhakar Srivastav; Cuyler Beatty; Ripudaman Singh Nirwan; Earl E. Scime

doi:10.1063/5.0040606

Incoherent Thomson scattering system for PHAse space MApping (PHASMA) experiment

Peiyun Shi, Prabhakar Srivastav, Cuyler Beatty, Ripudaman Singh Nirwan, Earl E. Scime

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

A new incoherent Thomson scattering system measures the evolution of electron velocity distribution functions perpendicular and parallel to the ambient magnetic field during kinking of a single flux rope and merging of two flux ropes through magnetic reconnection. The Thomson scattering system provides sub-millimeter spatial resolution, sufficient to diagnose the several millimeters sized magnetic reconnection electron diffusion region in the PHAse Space MAppgin experiment. Due to the relatively modest plasma density ∼1019 m-3 and electron temperature ∼1 eV, stray light suppression is critical for these measurements. Two volume Bragg gratings are used in series as a notch filter with a spectral bandwidth <0.1 nm in the collection branch. A CCD with a Gen III intensifier with peak quantum efficiency >47% is used as the detector in a 1.3 m spectrometer. Preliminary results of gun plasma electron temperature will be reported and compared with measurements obtained from a triple Langmuir probe.

Original language	English (US)
Article number	033102
Journal	Review of Scientific Instruments
Volume	92
Issue number	3
DOIs	https://doi.org/10.1063/5.0040606
State	Published - Mar 1 2021
Externally published	Yes

All Science Journal Classification (ASJC) codes

Instrumentation

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10.1063/5.0040606

Cite this

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title = "Incoherent Thomson scattering system for PHAse space MApping (PHASMA) experiment",

abstract = "A new incoherent Thomson scattering system measures the evolution of electron velocity distribution functions perpendicular and parallel to the ambient magnetic field during kinking of a single flux rope and merging of two flux ropes through magnetic reconnection. The Thomson scattering system provides sub-millimeter spatial resolution, sufficient to diagnose the several millimeters sized magnetic reconnection electron diffusion region in the PHAse Space MAppgin experiment. Due to the relatively modest plasma density ∼1019 m-3 and electron temperature ∼1 eV, stray light suppression is critical for these measurements. Two volume Bragg gratings are used in series as a notch filter with a spectral bandwidth <0.1 nm in the collection branch. A CCD with a Gen III intensifier with peak quantum efficiency >47\% is used as the detector in a 1.3 m spectrometer. Preliminary results of gun plasma electron temperature will be reported and compared with measurements obtained from a triple Langmuir probe.",

author = "Peiyun Shi and Prabhakar Srivastav and Cuyler Beatty and Nirwan, \{Ripudaman Singh\} and Scime, \{Earl E.\}",

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doi = "10.1063/5.0040606",

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T1 - Incoherent Thomson scattering system for PHAse space MApping (PHASMA) experiment

AU - Shi, Peiyun

AU - Srivastav, Prabhakar

AU - Beatty, Cuyler

AU - Nirwan, Ripudaman Singh

AU - Scime, Earl E.

PY - 2021/3/1

Y1 - 2021/3/1

N2 - A new incoherent Thomson scattering system measures the evolution of electron velocity distribution functions perpendicular and parallel to the ambient magnetic field during kinking of a single flux rope and merging of two flux ropes through magnetic reconnection. The Thomson scattering system provides sub-millimeter spatial resolution, sufficient to diagnose the several millimeters sized magnetic reconnection electron diffusion region in the PHAse Space MAppgin experiment. Due to the relatively modest plasma density ∼1019 m-3 and electron temperature ∼1 eV, stray light suppression is critical for these measurements. Two volume Bragg gratings are used in series as a notch filter with a spectral bandwidth <0.1 nm in the collection branch. A CCD with a Gen III intensifier with peak quantum efficiency >47% is used as the detector in a 1.3 m spectrometer. Preliminary results of gun plasma electron temperature will be reported and compared with measurements obtained from a triple Langmuir probe.

AB - A new incoherent Thomson scattering system measures the evolution of electron velocity distribution functions perpendicular and parallel to the ambient magnetic field during kinking of a single flux rope and merging of two flux ropes through magnetic reconnection. The Thomson scattering system provides sub-millimeter spatial resolution, sufficient to diagnose the several millimeters sized magnetic reconnection electron diffusion region in the PHAse Space MAppgin experiment. Due to the relatively modest plasma density ∼1019 m-3 and electron temperature ∼1 eV, stray light suppression is critical for these measurements. Two volume Bragg gratings are used in series as a notch filter with a spectral bandwidth <0.1 nm in the collection branch. A CCD with a Gen III intensifier with peak quantum efficiency >47% is used as the detector in a 1.3 m spectrometer. Preliminary results of gun plasma electron temperature will be reported and compared with measurements obtained from a triple Langmuir probe.

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Incoherent Thomson scattering system for PHAse space MApping (PHASMA) experiment

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