Abstract
| Language | English |
|---|---|
| Pages | 560-567 |
| Number of pages | 8 |
| Journal | High Energy Density Physics |
| Volume | 9 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1 Sep 2013 |
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Keywords
- relativistic laser plasma
- hollow atoms
- X-ray
- X-ray spectroscopy
- X-ray sources
- radiation-dominated kinetics
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Measurement and simulations of hollow atom X-ray spectra of solid-density relativistic plasma created by high-contrast PW optical laser pulses. / Pikuz, S.A.; Faenov, A.; Colgan, J.; Dance, R.J.; Abdallah, J.; Wagenaars, E.; Booth, N.; Culfa, O.; Evans, R.G.; Gray, R.J.; Kaempfer, T.; Lancaster, K.L.; McKenna, P.; Rossall, A.L.; Skobelev, I.; Schulze, K.S.; Uschmann, I.; Zhidkov, A.G.; Woolsey, N.C.
In: High Energy Density Physics, Vol. 9, No. 3, 01.09.2013, p. 560-567.Research output: Contribution to journal › Article
TY - JOUR
T1 - Measurement and simulations of hollow atom X-ray spectra of solid-density relativistic plasma created by high-contrast PW optical laser pulses
AU - Pikuz, S.A.
AU - Faenov, A.
AU - Colgan, J.
AU - Dance, R.J.
AU - Abdallah, J.
AU - Wagenaars, E.
AU - Booth, N.
AU - Culfa, O.
AU - Evans, R.G.
AU - Gray, R.J.
AU - Kaempfer, T.
AU - Lancaster, K.L.
AU - McKenna, P.
AU - Rossall, A.L.
AU - Skobelev, I.
AU - Schulze, K.S.
AU - Uschmann, I.
AU - Zhidkov, A.G.
AU - Woolsey, N.C.
PY - 2013/9/1
Y1 - 2013/9/1
N2 - K-shell spectra of solid Al excited by petawatt picosecond laser pulses have been investigated at the Vulcan PW facility. Laser pulses of ultrahigh contrast with an energy of 160J on the targetallow studies of interactions between the laser field and solid state matter at 10W/cm. Intense X-ray emission of KK hollow atoms (atoms without n=1 electrons) from thin aluminum foils is observed from optical laser plasma for the first time. Specifically for 1.5μm thin foil targets the hollow atom yield dominates the resonance line emission. It is suggested that the hollow atoms are predominantly excited by the impact of X-ray photons generated by radiation friction to fast electron currents in solid-density plasma due to Thomson scattering and bremsstrahlung in the transverse plasma fields. Numerical simulations of Al hollow atom spectra using the ATOMIC code confirm that the impact of keV photons dominates the atom ionization. Our estimates demonstrate that solid-density plasma generated by relativistic optical laser pulses provide the source of a polychromatic keV range X-ray field of 10W/cm intensity, and allows the study of excited matter in the radiation-dominated regime. High-resolution X-ray spectroscopy of hollow atom radiation is found to be a powerful tool to study the properties of high-energy density plasma created by intense X-ray radiation.
AB - K-shell spectra of solid Al excited by petawatt picosecond laser pulses have been investigated at the Vulcan PW facility. Laser pulses of ultrahigh contrast with an energy of 160J on the targetallow studies of interactions between the laser field and solid state matter at 10W/cm. Intense X-ray emission of KK hollow atoms (atoms without n=1 electrons) from thin aluminum foils is observed from optical laser plasma for the first time. Specifically for 1.5μm thin foil targets the hollow atom yield dominates the resonance line emission. It is suggested that the hollow atoms are predominantly excited by the impact of X-ray photons generated by radiation friction to fast electron currents in solid-density plasma due to Thomson scattering and bremsstrahlung in the transverse plasma fields. Numerical simulations of Al hollow atom spectra using the ATOMIC code confirm that the impact of keV photons dominates the atom ionization. Our estimates demonstrate that solid-density plasma generated by relativistic optical laser pulses provide the source of a polychromatic keV range X-ray field of 10W/cm intensity, and allows the study of excited matter in the radiation-dominated regime. High-resolution X-ray spectroscopy of hollow atom radiation is found to be a powerful tool to study the properties of high-energy density plasma created by intense X-ray radiation.
KW - relativistic laser plasma
KW - hollow atoms
KW - X-ray
KW - X-ray spectroscopy
KW - X-ray sources
KW - radiation-dominated kinetics
UR - http://www.scopus.com/inward/record.url?scp=84879436953&partnerID=8YFLogxK
U2 - 10.1016/j.hedp.2013.05.008
DO - 10.1016/j.hedp.2013.05.008
M3 - Article
VL - 9
SP - 560
EP - 567
JO - High Energy Density Physics
T2 - High Energy Density Physics
JF - High Energy Density Physics
SN - 1574-1818
IS - 3
ER -