Real-time changes induced by pulsed laser heating in ammonium perchlorate at static high pressures

1998 ◽  
Author(s):  
G. I. Pangilinan ◽  
T. P. Russell
Keyword(s):  
Real Time ◽  
Ammonium Perchlorate ◽  
Laser Heating ◽  
High Pressures ◽  
Pulsed Laser ◽  
Time Changes ◽  
Pulsed Laser Heating

scholarly journals The Effect of Pulsed Laser Heating on the Stability of Ferropericlase at High Pressures

Minerals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 542
Author(s):  
Georgios Aprilis ◽  
Anna Pakhomova ◽  
Stella Chariton ◽  
Saiana Khandarkhaeva ◽  
Caterina Melai ◽  
...  
Keyword(s):  
High Pressure ◽  
Lower Mantle ◽  
Laser Heating ◽  
High Pressures ◽  
Pulsed Laser ◽  
Experimental Conditions ◽  
Lowermost Part ◽  
The Stability ◽  
Pulsed Laser Heating ◽  
Calcium Silicate Perovskite

It is widely accepted that the lower mantle consists of mainly three major minerals—ferropericlase, bridgmanite and calcium silicate perovskite. Ferropericlase ((Mg,Fe)O) is the second most abundant of the three, comprising approximately 16–20 wt% of the lower mantle. The stability of ferropericlase at conditions of the lowermost mantle has been highly investigated, with controversial results. Amongst other reasons, the experimental conditions during laser heating (such as duration and achieved temperature) have been suggested as a possible explanation for the discrepancy. In this study, we investigate the effect of pulsed laser heating on the stability of ferropericlase, with a geochemically relevant composition of Mg0.76Fe0.24O (Fp24) at pressure conditions corresponding to the upper part of the lower mantle and at a wide temperature range. We report on the decomposition of Fp24 with the formation of a high-pressure (Mg,Fe)3O4 phase with CaTi2O4-type structure, as well as the dissociation of Fp24 into Fe-rich and Mg-rich phases induced by pulsed laser heating. Our results provide further arguments that the chemical composition of the lower mantle is more complex than initially thought, and that the compositional inhomogeneity is not only a characteristic of the lowermost part, but includes depths as shallow as below the transition zone.

scholarly journals Real-Time Observation of Nanosecond Liquid-Phase Assembly of Nickel Nanoparticles via Pulsed-Laser Heating

Langmuir ◽  
2012 ◽  
Vol 28 (49) ◽  
pp. 17168-17175 ◽  
Author(s):  
Joseph T. McKeown ◽  
Nicholas A. Roberts ◽  
Jason D. Fowlkes ◽  
Yueying Wu ◽  
Thomas LaGrange ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Real Time ◽  
Laser Heating ◽  
Nickel Nanoparticles ◽  
Pulsed Laser ◽  
Time Observation ◽  
Pulsed Laser Heating ◽  
Real Time Observation

Pulsed laser heating of soot: morphological changes

Carbon ◽  
1999 ◽  
Vol 37 (2) ◽  
pp. 231-239 ◽  
Author(s):  
Randy L Vander Wal ◽  
Mun Y Choi
Keyword(s):  
Laser Heating ◽  
Morphological Changes ◽  
Pulsed Laser ◽  
Pulsed Laser Heating

Thermal Modeling of the Cavity in Pulsed Excimer Laser Calorimeters

2000 ◽  
Author(s):  
D. H. Chen ◽  
Z. M. Zhang
Keyword(s):  
Laser Heating ◽  
Average Power ◽  
Pulsed Laser ◽  
Thermal Response ◽  
Element Model ◽  
Electrical Heating ◽  
Deep Ultraviolet ◽  
Simplified Finite Element Model ◽  
193 Nm ◽  
Pulsed Laser Heating

Abstract A simplified finite element model is built to study the thermal response of the 193-nm pulsed-laser calorimeter. The nonequivalence between pulsed-laser heating and electrical heating is estimated to be 0.46% at the thermocouple locations by comparing the calibration factors for average-power laser heating and electrical heating. This study should help the development of calibration and measurement standards in pulsed energy measurements for deep ultraviolet excimer lasers that are important for photolithographic and materials processing applications.

Effect of pulsed laser heating on the magnetic properties of the amorphous alloy Fe76Si13B11

2009 ◽  
Vol 108 (2) ◽  
pp. 125-130 ◽  
Author(s):  
V. V. Girzhon ◽  
A. V. Smolyakov ◽  
N. G. Babich ◽  
M. P. Semen’ko
Keyword(s):  
Magnetic Properties ◽  
Amorphous Alloy ◽  
Laser Heating ◽  
Pulsed Laser ◽  
Pulsed Laser Heating

A Computer Model for Pulsed Laser Heating of Device Structures

1981 ◽  
Vol 128 (8) ◽  
pp. 1798-1803 ◽  
Author(s):  
D. J. Godfrey ◽  
A. C. Hill ◽  
C. Hill
Keyword(s):  
Computer Model ◽  
Laser Heating ◽  
Pulsed Laser ◽  
Device Structures ◽  
Pulsed Laser Heating

Molecular dynamics study of lubricant depletion by pulsed laser heating

2018 ◽  
Vol 440 ◽  
pp. 73-83 ◽  
Author(s):  
Young Woo Seo ◽  
Andreas Rosenkranz ◽  
Frank E. Talke
Keyword(s):  
Molecular Dynamics ◽  
Laser Heating ◽  
Pulsed Laser ◽  
Lubricant Depletion ◽  
Pulsed Laser Heating
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