Laser plasma x-ray source for ultrafast time-resolved x-ray absorption spectroscopy
(2015) In Structural Dynamics 2(2).- Abstract
- We describe a laser-driven x-ray plasma source designed for ultrafast x-ray absorption spectroscopy. The source is comprised of a 1 kHz, 20 W, femtosecond pulsed infrared laser and a water target. We present the x-ray spectra as a function of laser energy and pulse duration. Additionally, we investigate the plasma temperature and photon flux as we vary the laser energy. We obtain a 75 mu m FWHM x-ray spot size, containing similar to 10(6) photons/s, by focusing the produced x-rays with a polycapillary optic. Since the acquisition of x-ray absorption spectra requires the averaging of measurements from >10(7) laser pulses, we also present data on the source stability, including single pulse measurements of the x-ray yield and the x-ray... (More)
- We describe a laser-driven x-ray plasma source designed for ultrafast x-ray absorption spectroscopy. The source is comprised of a 1 kHz, 20 W, femtosecond pulsed infrared laser and a water target. We present the x-ray spectra as a function of laser energy and pulse duration. Additionally, we investigate the plasma temperature and photon flux as we vary the laser energy. We obtain a 75 mu m FWHM x-ray spot size, containing similar to 10(6) photons/s, by focusing the produced x-rays with a polycapillary optic. Since the acquisition of x-ray absorption spectra requires the averaging of measurements from >10(7) laser pulses, we also present data on the source stability, including single pulse measurements of the x-ray yield and the x-ray spectral shape. In single pulse measurements, the x-ray flux has a measured standard deviation of 8%, where the laser pointing is the main cause of variability. Further, we show that the variability in x-ray spectral shape from single pulses is low, thus justifying the combining of x-rays obtained from different laser pulses into a single spectrum. Finally, we show a static x-ray absorption spectrum of a ferrioxalate solution as detected by a microcalorimeter array. Altogether, our results demonstrate that this water-jet based plasma source is a suitable candidate for laboratory-based time-resolved x-ray absorption spectroscopy experiments. (C) 2015 Author(s). (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/7422438
- author
- Miaja-Avila, L. ; O'Neil, G. C. ; Uhlig, Jens LU ; Cromer, C. L. ; Dowell, M. L. ; Jimenez, R. ; Hoover, A. S. ; Silverman, K. L. and Ullom, J. N.
- organization
- publishing date
- 2015
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Structural Dynamics
- volume
- 2
- issue
- 2
- article number
- 024301
- publisher
- American Institute of Physics (AIP)
- external identifiers
-
- wos:000354994100006
- scopus:84929497227
- pmid:26798792
- pmid:26798792
- ISSN
- 2329-7778
- DOI
- 10.1063/1.4913585
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060)
- id
- 352379fe-f691-470f-89df-2908cd4da952 (old id 7422438)
- date added to LUP
- 2016-04-01 14:19:20
- date last changed
- 2023-11-13 05:58:03
@article{352379fe-f691-470f-89df-2908cd4da952,
abstract = {{We describe a laser-driven x-ray plasma source designed for ultrafast x-ray absorption spectroscopy. The source is comprised of a 1 kHz, 20 W, femtosecond pulsed infrared laser and a water target. We present the x-ray spectra as a function of laser energy and pulse duration. Additionally, we investigate the plasma temperature and photon flux as we vary the laser energy. We obtain a 75 mu m FWHM x-ray spot size, containing similar to 10(6) photons/s, by focusing the produced x-rays with a polycapillary optic. Since the acquisition of x-ray absorption spectra requires the averaging of measurements from >10(7) laser pulses, we also present data on the source stability, including single pulse measurements of the x-ray yield and the x-ray spectral shape. In single pulse measurements, the x-ray flux has a measured standard deviation of 8%, where the laser pointing is the main cause of variability. Further, we show that the variability in x-ray spectral shape from single pulses is low, thus justifying the combining of x-rays obtained from different laser pulses into a single spectrum. Finally, we show a static x-ray absorption spectrum of a ferrioxalate solution as detected by a microcalorimeter array. Altogether, our results demonstrate that this water-jet based plasma source is a suitable candidate for laboratory-based time-resolved x-ray absorption spectroscopy experiments. (C) 2015 Author(s).}},
author = {{Miaja-Avila, L. and O'Neil, G. C. and Uhlig, Jens and Cromer, C. L. and Dowell, M. L. and Jimenez, R. and Hoover, A. S. and Silverman, K. L. and Ullom, J. N.}},
issn = {{2329-7778}},
language = {{eng}},
number = {{2}},
publisher = {{American Institute of Physics (AIP)}},
series = {{Structural Dynamics}},
title = {{Laser plasma x-ray source for ultrafast time-resolved x-ray absorption spectroscopy}},
url = {{http://dx.doi.org/10.1063/1.4913585}},
doi = {{10.1063/1.4913585}},
volume = {{2}},
year = {{2015}},
}