Citation

BibTex format

@article{Hobbs:2020:10.1103/physreva.101.053431,
author = {Hobbs, LMR and Burridge, D and Hill, MP and Hoarty, DJ and Brown, CRD and Charles, R and Cooper, G and James, SF and Wilson, LA and Babbage, W and Hatfield, PW and Beiersdorfer, P and Nilsen, J and Scott, H and Rose, SJ},
doi = {10.1103/physreva.101.053431},
journal = {Physical Review A},
pages = {053431--1--053431--8},
title = {X-ray-line coincidence photopumping in a potassium-chlorine mixed plasma},
url = {http://dx.doi.org/10.1103/physreva.101.053431},
volume = {101},
year = {2020}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - Exploiting the multiple long pulse capability and suite of x-ray diagnostics of the Orion laser, we have set out to explore line coincidence photopuming—the enhancement in population of an atomic level brought on by resonant absorption of x rays from a different emitting ion. Unlike previous work, the two ions are in the same plasma and so the experiment is an x-ray analog of the well-known Bowen resonance fluorescence mechanism that operates in astrophysical situations in the optical region. Our measurements have shown enhanced fluorescence in a chlorine plasma, attributable to line coincident photopumping from co-mixed potassium ions. To detect this relatively low signal-to-noise phenomenon, the data from multiple shots are combined, and the statistical method of bootstrapping is used to assign a confidence value to the measured enhancement, resulting in an estimate of the enhancement of 39±1618% compared to the null case, where no pumping occurs. The experimental results have been compared to coupled radiation-transport and radiation hydrodynamics simulations using the cretin code together with the nym radiation hydrodynamics model and agreement has been found, with the simulations also predicting modest enhancement.
AU - Hobbs,LMR
AU - Burridge,D
AU - Hill,MP
AU - Hoarty,DJ
AU - Brown,CRD
AU - Charles,R
AU - Cooper,G
AU - James,SF
AU - Wilson,LA
AU - Babbage,W
AU - Hatfield,PW
AU - Beiersdorfer,P
AU - Nilsen,J
AU - Scott,H
AU - Rose,SJ
DO - 10.1103/physreva.101.053431
EP - 1
PY - 2020///
SN - 2469-9926
SP - 053431
TI - X-ray-line coincidence photopumping in a potassium-chlorine mixed plasma
T2 - Physical Review A
UR - http://dx.doi.org/10.1103/physreva.101.053431
UR - https://journals.aps.org/pra/abstract/10.1103/PhysRevA.101.053431
UR - http://hdl.handle.net/10044/1/79344
VL - 101
ER -