High-resolution spectroscopy of laser-produced plasmas in the photon energy range above 10 keV

Tillman, Carl; Johansson, Sven; Erlandsson, B.; Grätz, Matthias; Hemdal, Bengt; Almén, Anja; Mattsson, Sören; Svanberg, Sune

doi:10.1016/s0168-9002(97)00476-2

Cited by 14 publications

(8 citation statements)

References 15 publications

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“…2, with the one used by Tillman et al in 1997. 17 The distances between the x-ray source and the detectors were much larger in their experiments because of the higher x-ray intensity that was generated. The two germanium detectors shown in Fig.…”

Section: X-ray Detectionmentioning

confidence: 99%

“…10,11 Detectors that can be used above 100 keV include x-ray diodes, 12 scintillation detectors, [13][14][15] thermoluminescence detectors, 3 and germanium ͑Ge͒ detectors. 16,17 The latter can easily detect photons with energies of several megaelectron-volts. Since many x-ray detectors have been developed for the nuclear science community, they have been adapted to the more or less constant x-ray fluxes which are common in this field.…”

Section: Introductionmentioning

confidence: 99%

“…Since no more than one x-ray photon can be correctly detected per laser pulse, the data acquisition time can be very long with a 10 Hz laser. 17 However, with higher repetition-rate lasers, the technique becomes more attractive. Alternatively, energy-dispersive optics can be utilized, such as diffracting crystals, but these have their own drawbacks at high photon energies.…”

Section: Introductionmentioning

confidence: 99%

“…It is an extension of earlier work with a 10 Hz TW laser performed at the High Power Laser Facility, which is a part of the Lund Laser Center. 11,[17][18][19][20] The x rays were produced by obliquely focusing p-polarized laser pulses from a 1 kHz laser system onto a rotating tantalum target, whereby a hot, nonequilibrium plasma was produced. The prepulse level was kept low in order to minimize the formation of an early preplasma.…”

Section: Introductionmentioning

confidence: 99%

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High-repetition-rate, hard x-ray radiation from a laser-produced plasma: Photon yield and application considerations

Sjögren

Harbst

Wahlström

et al. 2003

Review of Scientific Instruments

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High-repetition-rate, hard x-ray radiation from a laser-produced plasma: Photon yield and application considerations Sjögren, Anders; Harbst, Michael; Wahlström, Claes-Göran; Svanberg, Sune; Olsson, C Link to publication Citation for published version (APA): Sjögren, A., Harbst, M., Wahlström, C-G., Svanberg, S., & Olsson, C. (2003). High-repetition-rate, hard x-ray radiation from a laser-produced plasma: Photon yield and application considerations. Review of Scientific Instruments, 74(4), 2300-2311. DOI: 10.1063/1.1544054General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal High-repetition-rate, hard x-ray radiation from a laser-produced plasma: Photon yield and application considerations We present an experimental study of hard x rays produced in laser-produced plasmas. The laser used is a 1 kHz system, delivering 0.7 mJ for 25 fs onto a solid target. The x-ray spectrum was measured with calibrated germanium detectors, allowing a very good estimate of the absolute number of photons emitted from the plasma over a wide energy range; from 7 keV to 0.5 MeV. Assuming a bi-Maxwellian electron distribution with temperatures of 4.5 and 63 keV, theoretical calculations support the experimental findings. The imaging characteristics of the x-ray source were investigated experimentally employing image plates and theoretically based on the electron distribution.

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Section: X-ray Detectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

High-repetition-rate, hard x-ray radiation from a laser-produced plasma: Photon yield and application considerations

Sjögren

Harbst

Wahlström

et al. 2003

Review of Scientific Instruments

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“…Both a bremsstrahlunglike continuum and characteristic radiation from the target material are emitted. 19 As an example, the measured spectrum from a tantalum target is shown in Fig. 4.…”

Section: Experimental Setup For X-ray Generation and Detectionmentioning

confidence: 99%

Time‐gated imaging in planar and tomographic x‐ray imaging

1999

Self Cite

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Time-gated imaging is a new technique for scatter suppression in radiological imaging, based on the use of ultrashort x-ray pulses in combination with a fast gatable detector. We demonstrate scatter suppression in both planar and computed tomography ͑CT͒ radiography in an experimental model using x rays from a laser-produced plasma. The scatter-suppression efficiency of time-gated imaging is found to be similar to existing standard techniques. Furthermore, it allows for a potential decrease in patient dose. Monte-Carlo simulations confirm these results. We present an overview including theoretical simulations, experimental studies and comparisons to established techniques. The current technical limitations are evaluated and possible future applications in volumetric CT imaging are discussed.

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Laser Spectroscopy

Svanberg¹

2004

Atomic and Molecular Spectroscopy

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High-resolution spectroscopy of laser-produced plasmas in the photon energy range above 10 keV

Cited by 14 publications

References 15 publications

High-repetition-rate, hard x-ray radiation from a laser-produced plasma: Photon yield and application considerations

High-repetition-rate, hard x-ray radiation from a laser-produced plasma: Photon yield and application considerations

Time‐gated imaging in planar and tomographic x‐ray imaging

Laser Spectroscopy

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