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@ARTICLE{Aad:601420,
author = {Aad, G. and others},
collaboration = {{ATLAS Collaboration}},
title = {{O}bservation of {S}ingle-{T}op-{Q}uark {P}roduction in
{A}ssociation with a {P}hoton {U}sing the {ATLAS}
{D}etector},
journal = {Physical review letters},
volume = {131},
number = {18},
issn = {0031-9007},
address = {College Park, Md.},
publisher = {APS},
reportid = {PUBDB-2024-00174},
pages = {181901},
year = {2023},
abstract = {A new diamond anvil cell experimental approach has been
implemented at the European x-ray Free Electron Laser,
combining pulsed laser heating with MHz x-ray diffraction.
Here, we use this setup to determine liquidus temperatures
under extreme conditions, based on the determination of
time-resolved crystallization. The focus is on a Fe-Si-O
ternary system, relevant for planetary cores. This
time-resolved diagnostic is complemented by a finite-element
model, reproducing temporal temperature profiles measured
experimentally using streaked optical pyrometry. This model
calculates the temperature and strain fields by including
(i) pressure and temperature dependencies of material
properties, and (ii) the heat-induced thermal stress,
including feedback effect on material parameter variations.
Making our model more realistic, these improvements are
critical as they give 7000 K temperature differences
compared to previous models. Laser intensities are
determined by seeking minimal deviation between measured and
modeled temperatures. Combining models and streak optical
pyrometry data extends temperature determination below
detection limit. The presented approach can be used to infer
the liquidus temperature by the appearance of diffraction
spots. In addition, temperatures obtained by the model agree
with crystallization temperatures reported for Fe–Si
alloys. Our model reproduces the planetary relevant
experimental conditions, providing temperature, pressure,
and volume conditions. Those predictions are then used to
determine liquidus temperatures at experimental timescales
where chemical migration is limited. This synergy of novel
time-resolved experiments and finite-element modeling pushes
further the interpretation capabilities in diamond anvil
cell experiments.},
cin = {FHR / ATLAS / UNI/EXP / $Z_ATLAS$ / $Z_GA$},
ddc = {530},
cid = {I:(DE-H253)FHR-20120731 / I:(DE-H253)ATLAS-20120731 /
$I:(DE-H253)UNI_EXP-20120731$ /
$I:(DE-H253)Z_ATLAS-20210408$ / $I:(DE-H253)Z_GA-20210408$},
pnm = {622 - Detector Technologies and Systems (POF4-622)},
pid = {G:(DE-HGF)POF4-622},
experiment = {EXP:(DE-H253)LHC-Exp-ATLAS-20150101},
typ = {PUB:(DE-HGF)16},
pubmed = {37977601},
UT = {WOS:001094321900001},
doi = {10.1103/PhysRevLett.131.181901},
url = {https://bib-pubdb1.desy.de/record/601420},
}