Abstract
The rate at which atoms and ions within a plasma are further ionized by collisions with the free electrons is a fundamental parameter that dictates the dynamics of plasma systems at intermediate and high densities. While collision rates are well known experimentally in a few dilute systems, similar measurements for nonideal plasmas at densities approaching or exceeding those of solids remain elusive. Here we describe a spectroscopic method to study collision rates in solid-density aluminium plasmas created and diagnosed using the Linac Coherent light Source free-electron X-ray laser, tuned to specific interaction pathways around the absorption edges of ionic charge states. We estimate the rate of collisional ionization in solid-density aluminium plasmas at temperatures ∼30eV to be several times higher than that predicted by standard semiempirical models.
| Original language | English (US) |
|---|---|
| Article number | 6397 |
| Journal | Nature Communications |
| Volume | 6 |
| DOIs | |
| State | Published - Mar 4 2015 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Chemistry(all)
- Biochemistry, Genetics and Molecular Biology(all)
- Physics and Astronomy(all)
Cite this
Investigation of femtosecond collisional ionization rates in a solid-density aluminium plasma. / Vinko, S. M.; Ciricosta, O.; Preston, T. R.; Rackstraw, D. S.; Brown, C. R.D.; Burian, T.; Chalupský, J.; Cho, B. I.; Chung, H. K.; Engelhorn, K.; Falcone, R. W.; Fiokovinini, R.; Hájková, V.; Heimann, P. A.; Juha, L.; Lee, H. J.; Lee, R. W.; Messerschmidt, Marc; Nagler, B.; Schlotter, W.; Turner, J. J.; Vysin, L.; Zastrau, U.; Wark, J. S.
In: Nature Communications, Vol. 6, 6397, 04.03.2015.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Investigation of femtosecond collisional ionization rates in a solid-density aluminium plasma
AU - Vinko, S. M.
AU - Ciricosta, O.
AU - Preston, T. R.
AU - Rackstraw, D. S.
AU - Brown, C. R.D.
AU - Burian, T.
AU - Chalupský, J.
AU - Cho, B. I.
AU - Chung, H. K.
AU - Engelhorn, K.
AU - Falcone, R. W.
AU - Fiokovinini, R.
AU - Hájková, V.
AU - Heimann, P. A.
AU - Juha, L.
AU - Lee, H. J.
AU - Lee, R. W.
AU - Messerschmidt, Marc
AU - Nagler, B.
AU - Schlotter, W.
AU - Turner, J. J.
AU - Vysin, L.
AU - Zastrau, U.
AU - Wark, J. S.
PY - 2015/3/4
Y1 - 2015/3/4
N2 - The rate at which atoms and ions within a plasma are further ionized by collisions with the free electrons is a fundamental parameter that dictates the dynamics of plasma systems at intermediate and high densities. While collision rates are well known experimentally in a few dilute systems, similar measurements for nonideal plasmas at densities approaching or exceeding those of solids remain elusive. Here we describe a spectroscopic method to study collision rates in solid-density aluminium plasmas created and diagnosed using the Linac Coherent light Source free-electron X-ray laser, tuned to specific interaction pathways around the absorption edges of ionic charge states. We estimate the rate of collisional ionization in solid-density aluminium plasmas at temperatures ∼30eV to be several times higher than that predicted by standard semiempirical models.
AB - The rate at which atoms and ions within a plasma are further ionized by collisions with the free electrons is a fundamental parameter that dictates the dynamics of plasma systems at intermediate and high densities. While collision rates are well known experimentally in a few dilute systems, similar measurements for nonideal plasmas at densities approaching or exceeding those of solids remain elusive. Here we describe a spectroscopic method to study collision rates in solid-density aluminium plasmas created and diagnosed using the Linac Coherent light Source free-electron X-ray laser, tuned to specific interaction pathways around the absorption edges of ionic charge states. We estimate the rate of collisional ionization in solid-density aluminium plasmas at temperatures ∼30eV to be several times higher than that predicted by standard semiempirical models.
UR - http://www.scopus.com/inward/record.url?scp=84924071133&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84924071133&partnerID=8YFLogxK
U2 - 10.1038/ncomms7397
DO - 10.1038/ncomms7397
M3 - Article
AN - SCOPUS:84924071133
VL - 6
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
M1 - 6397
ER -