K-shell spectra from Ag, Sn, Sm, Ta, and Au generated by intense femtosecond laser pulses

Seely, John F.; Holland, Glenn E.; Hudson, Lawrence T.; Szabo, Csilla I.; Henins, Albert; Park, Hyesook; Patel, P. K.; Tommasini, R.; Laming, J. M.

doi:10.1016/j.hedp.2007.02.022

Cited by 37 publications

(21 citation statements)

References 18 publications

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“…The α-quartz crystals that we used were symmetrically cut into thin slices with the (11)(12)(13)(14)(15)(16)(17)(18)(19)(20) surface plane and the (10-11) edge plane. Since thinly sliced quartz is elastic at room temperature, it can be bent without additional heating.…”

Section: Mechanical Designmentioning

confidence: 99%

Hard x-ray transmission curved crystal spectrometers (10–100 keV) for laser fusion experiments at the ShenGuang-III laser facility

et al. 2016

High Pow Laser Sci Eng

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Two transmission curved crystal spectrometers are designed to measure the hard x-ray emission in the laser fusion experiment of Compton radiography of implosion target on ShenGuang-III laser facility in China. Cylindrically curved α-quartz (10-11) crystals with curvature radii of 150 and 300 mm are used to cover spectral ranges of 10-56 and 17-100 keV, respectively. The distance between the crystal and the x-ray source can be changed over a broad distance from 200 to 1500 mm. The optical design, including the integral reflectivity of the curved crystal, the sensitivity, and the spectral resolution of the spectrometers, is discussed. We also provide mechanic design details and experimental results using a Mo anode x-ray source. High-quality spectra were obtained. We confirmed that the spectral resolution can be improved by increasing the working distance, which is the distance between the recording medium and the Rowland circle.

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Section: Mechanical Designmentioning

confidence: 99%

Hard x-ray transmission curved crystal spectrometers (10–100 keV) for laser fusion experiments at the ShenGuang-III laser facility

et al. 2016

High Pow Laser Sci Eng

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“…To avoid influence of hard x-rays from plasma on the output signal, the whole body of the spectrometer and the detector are covered with lead shields. This Cauchois geometry effectively discriminates 0 th -order component, stray x-rays and fluorescence from spectrometer components such as filters [3,4]. By varying the distances from the crystal to the source and detector, this spectrometer can cover the energy range of either 10-60 keV (Type-I set) or 30-100 keV (Type-II set) (see Fig.…”

Section: High Energy K Line Spectrometermentioning

confidence: 99%

Absolute Kα line spectroscopy for cone-guided fast-ignition targets

Nishimura

Zhang

Namimoto

et al. 2013

EPJ Web of Conferences

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Abstract. Absolute K line spectroscopy is proposed to study laser-plasma interactions taking place in cone-guided fast ignition targets. A transmission-type spectrometer was developed, and its absolute sensitivity was measured with laser-generated x-rays and radioisotopes, showing good agreement with theoretical predictions. The absolute yield of Au K line was mesured in the fast ignition experimental campaign perfomed at ILE, Osaka University. Assuming a single Maxwellian electron spectrum and oneway travel of hot electrons through the cone, energy transfer efficiency of incident LFEX laser to hot electrons was derived.

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“…Line and continuum emission were recorded using a single photon counting (SPC) Charged Coupled Device (CCD) camera (for K-α lines with energy between 16 keV and 26 keV) and with the high-energy channel of the Dual Crystal Spectrometer (DCS) [7]. The DCS uses a (10-11) quartz crystal in transmission (Laue) geometry, bent to a radius of 254 mm, and covers the spectral range from 18 keV to 120 keV.…”

Section: Llnl-tr-429373mentioning

confidence: 99%

Development of backlighting sources for a Compton Radiography diagnostic of Inertial Confinement Fusion targets

Tommasini¹

2010

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Abstract. An important diagnostic tool for inertial confinement fusion is time-resolved imaging of the dense cold fuel surrounding the hot spot. Here we report on the source and diagnostic development of hard x-ray radiography and on the first radiographs of direct drive implosions obtained at photon energies up to about 100keV, where the Compton effect is the dominant contributor to the shell opacity. The radiographs of direct drive, plastic shell implosions obtained at the OMEGA laser facility have a spatial resolution of ~ 10um and a temporal resolution of ~10ps. This novel Compton Radiography is an invaluable diagnostic tool for Inertial Confinement Fusion targets, and will be integrated at the National Ignition Facility (NIF).

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K-shell spectra from Ag, Sn, Sm, Ta, and Au generated by intense femtosecond laser pulses

Cited by 37 publications

References 18 publications

Hard x-ray transmission curved crystal spectrometers (10–100 keV) for laser fusion experiments at the ShenGuang-III laser facility

Hard x-ray transmission curved crystal spectrometers (10–100 keV) for laser fusion experiments at the ShenGuang-III laser facility

Absolute Kα line spectroscopy for cone-guided fast-ignition targets

Development of backlighting sources for a Compton Radiography diagnostic of Inertial Confinement Fusion targets

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