Laser heating system at the Extreme Conditions Beamline, P02.2, PETRA III.
diamond anvil cell
extreme conditions
high-pressure melting of iron
pulse laser heating
ray-tracing simulations
Journal
Journal of synchrotron radiation
ISSN: 1600-5775
Titre abrégé: J Synchrotron Radiat
Pays: United States
ID NLM: 9888878
Informations de publication
Date de publication:
01 Nov 2021
01 Nov 2021
Historique:
received:
11
03
2021
accepted:
06
09
2021
entrez:
5
11
2021
pubmed:
6
11
2021
medline:
6
11
2021
Statut:
ppublish
Résumé
A laser heating system for samples confined in diamond anvil cells paired with in situ X-ray diffraction measurements at the Extreme Conditions Beamline of PETRA III is presented. The system features two independent laser configurations (on-axis and off-axis of the X-ray path) allowing for a broad range of experiments using different designs of diamond anvil cells. The power of the continuous laser source can be modulated for use in various pulsed laser heating or flash heating applications. An example of such an application is illustrated here on the melting curve of iron at megabar pressures. The optical path of the spectroradiometry measurements is simulated with ray-tracing methods in order to assess the level of present aberrations in the system and the results are compared with other systems, that are using simpler lens optics. Based on the ray-tracing the choice of the first achromatic lens and other aspects for accurate temperature measurements are evaluated.
Identifiants
pubmed: 34738928
pii: S1600577521009231
doi: 10.1107/S1600577521009231
pmc: PMC8570206
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
1747-1757Subventions
Organisme : Bundesministerium für Bildung und Forschung
ID : 05K10RFA
Organisme : National Science Foundation - Earth Sciences
ID : EAR - 1634415
Organisme : Department of Energy- GeoSciences
ID : DE-FG02-94ER14466
Informations de copyright
open access.
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