Calibration of a high resolution grating soft x-ray spectrometer

Magee, E. W.; Dunn, J.; Brown, G. V.; Cone, K. V.; Park, J.; Porter, F. S.; Kilbourne, C. A.; Kelley, R. L.; Beiersdörfer, P.

doi:10.1063/1.3494276

Cited by 4 publications

(1 citation statement)

References 14 publications

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“…For example, using line radiation from helium-and hydrogen-like ions of carbon, nitrogen, oxygen, neon, and aluminum, we have calibrated the QE of two grating spectrometers across the 0.3 to 2 keV energy band in less than 12 hours each. 14,15 Blocking filters made of thin (∼ 0.1-20 μm) metal, metal alloy, or metalized plastic are regularly employed by diagnostics of both terrestrial and non-terrestrial plasmas. These filters reject unwanted radiation or debris from reaching the detector or provide energy fiducials via known absorption edge structures.…”

Section: Calibration Capabilitiesmentioning

confidence: 99%

A brief overview of the Fusion and Astrophysics Data and Diagnostic Calibration Facility

Brown

Beiersdörfer

Clementson

et al. 2010

Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray

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The Fusion and Astrophysics (FAST) Data and Diagnostic Calibration Facility located at the Lawrence Livermore National Laboratory is a state-of-the-art facility used to calibrate radiation based diagnostics and study atomic processes for investigating fusion and astrophysical plasmas. FAST has at its disposal a full suite of radiation generation and detection devices, including two electron beam ion traps: EBIT-I and SuperEBIT and an absolutely calibrated x-ray calorimeter spectrometer. FAST covers the energy range between 0.01 and 100 keV, and can thus be used to calibrate a variety of plasma diagnostics. Instrument parameters that can be calibrated include line profiles, transmission and reflection efficiencies, and the quantum efficiency of grating and crystal spectrometers and solid state detectors. FAST can be used to test fully integrated instrumentation, and is ideal for spectrometers and detectors to be flown on orbiting observatories, sounding rockets, used as ground support equipment to verify flight instrumentation, in laboratory astrophysics experiments, and to diagnose magnetic and inertial confinement fusion plasmas. Here we present an overview of the calibration capabilities of this facility including some results.

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Section: Calibration Capabilitiesmentioning

confidence: 99%

A brief overview of the Fusion and Astrophysics Data and Diagnostic Calibration Facility

Brown

Beiersdörfer

Clementson

et al. 2010

Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray

Self Cite

View full text Add to dashboard Cite

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Design and measurement of a Cu L-edge x-ray filter for free electron laser pumped x-ray laser experiments

Dunn

London

Cone

et al. 2010

Review of Scientific Instruments

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An inner-shell photoionized x-ray laser pumped by the Linac Coherent Light Source (LCLS) free electron laser has been proposed recently. The measurement of the on-axis 849 eV Ne Kα laser and protection of the x-ray spectrometer from damage require attenuation of the 1 keV LCLS beam. An Al/Cu foil combination is well suited, serving as a low energy bandpass filter below the Cu L-edge at 933 eV. A high resolution grating spectrometer is used to measure the transmission of a candidate filter with an intense laser-produced x-ray backlighter developed at the Lawrence Livermore National Laboratory Jupiter Laser Facility Janus. The methodology and discussion of the observed fine structure above the Cu L-edge will be presented.

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Electron temperature and density characterization using L-shell spectroscopy of laser irradiated buried iron layer targets

et al. 2014

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Uniform high density plasmas of different materials with properties relevant to the interior of stars and to inertial fusion can be created by laser irradiation of targets containing a buried layer of the material. Buried layer targets also enable the diagnosis of hot and thermal electron, x-ray and ion heating of targets. In this paper, L-emission spectroscopy from an iron layer (thickness 77 nm) encased in an otherwise plastic target (of thickness 240 nm–1.36 μm on the laser side) is irradiated by 0.53 μm wavelength, 2 ps duration laser pulses at irradiances of 1017–1018 Wcm−2. The relative iron L-emission from Li-like Fe XXIV to Ne-like Fe XVII is used to diagnose the plasma conditions of temperature and density in the iron layer. As the upper quantum states of the L-emission lines are in local thermodynamic equilibrium, line intensity ratios depend on both electron temperature and density, which—we show—enables the simultaneous measurement of both electron temperature and density by considering several line intensity ratios. We also show that hot electron target heating and the value of thermal flux limited heat conduction can be evaluated from the relative intensity of iron lines.

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Calibration of a high resolution grating soft x-ray spectrometer

Cited by 4 publications

References 14 publications

A brief overview of the Fusion and Astrophysics Data and Diagnostic Calibration Facility

A brief overview of the Fusion and Astrophysics Data and Diagnostic Calibration Facility

Design and measurement of a Cu L-edge x-ray filter for free electron laser pumped x-ray laser experiments

Electron temperature and density characterization using L-shell spectroscopy of laser irradiated buried iron layer targets

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