scholarly journals Nanosecond laser pulse heating of a platinum surface studied by pump-probe X-ray diffraction

2016 ◽  
Vol 109 (4) ◽  
pp. 043107 ◽  
Author(s):  
Roman Shayduk ◽  
Vedran Vonk ◽  
Björn Arndt ◽  
Dirk Franz ◽  
Jörg Strempfer ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Pulse Heating ◽  
Nanosecond Laser Pulse ◽  
Nanosecond Laser ◽  
X Ray Diffraction ◽  
Platinum Surface ◽  
Pump Probe ◽  
X Ray ◽  
Laser Pulse Heating

THERMAL AND MECHANICAL RESPONSES OF GOLD FILMS DURING NANOSECOND LASER-PULSE HEATING

1994 ◽  
Vol 7 (3) ◽  
pp. 175-188 ◽  
Author(s):  
Taiqing Qiu ◽  
Chang-Lin Tien ◽  
Mark A. Shannon ◽  
Richard E. Russo
Keyword(s):  
Laser Pulse ◽  
Pulse Heating ◽  
Nanosecond Laser Pulse ◽  
Nanosecond Laser ◽  
Gold Films ◽  
Mechanical Responses ◽  
Laser Pulse Heating

Picosecond time-resolved X-ray diffraction during laser-pulse heating of an Au(111) crystal

1995 ◽  
Vol 28 (3) ◽  
pp. 358-362 ◽  
Author(s):  
I. V. Tomov ◽  
P. Chen ◽  
P. M. Rentzepis
Keyword(s):  
Laser Pulse ◽  
Pulse Heating ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
X Ray ◽  
Laser Pulse Heating

Soft x-ray emission from a double-stream gas puff target irradiated by a nanosecond laser pulse

2001 ◽  
Author(s):  
Andrzej Bartnik ◽  
Henryk Fiedorowicz ◽  
Rafal Rakowski ◽  
Miroslaw Szczurek ◽  
Fred Bijkerk ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Nanosecond Laser Pulse ◽  
Nanosecond Laser ◽  
X Ray

scholarly journals Imaging molecular structure through femtosecond photoelectron diffraction on aligned and oriented gas-phase molecules

2014 ◽  
Vol 171 ◽  
pp. 57-80 ◽  
Author(s):  
Rebecca Boll ◽  
Arnaud Rouzée ◽  
Marcus Adolph ◽  
Denis Anielski ◽  
Andrew Aquila ◽  
...  
Keyword(s):  
Gas Phase ◽  
Angular Distributions ◽  
Nanosecond Laser Pulse ◽  
Nanosecond Laser ◽  
Time Resolved ◽  
Pump Probe ◽  
X Ray ◽  
Photoelectron Diffraction ◽  
Gas Phase Molecules ◽  
Photoelectron Angular Distributions

This paper gives an account of our progress towards performing femtosecond time-resolved photoelectron diffraction on gas-phase molecules in a pump–probe setup combining optical lasers and an X-ray free-electron laser. We present results of two experiments aimed at measuring photoelectron angular distributions of laser-aligned 1-ethynyl-4-fluorobenzene (C8H5F) and dissociating, laser-aligned 1,4-dibromobenzene (C6H4Br2) molecules and discuss them in the larger context of photoelectron diffraction on gas-phase molecules. We also show how the strong nanosecond laser pulse used for adiabatically laser-aligning the molecules influences the measured electron and ion spectra and angular distributions, and discuss how this may affect the outcome of future time-resolved photoelectron diffraction experiments.

Efficient multi-keV x-ray source generated by nanosecond laser pulse irradiated multi-layer thin foils target

2014 ◽  
Vol 21 (4) ◽  
pp. 043107 ◽  
Author(s):  
Shao-yong Tu ◽  
Guang-yue Hu ◽  
Wen-yong Miao ◽  
Bin Zhao ◽  
Jian Zheng ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Nanosecond Laser Pulse ◽  
Nanosecond Laser ◽  
X Ray ◽  
Thin Foils

scholarly journals Relativistic laser propagation through underdense and overdense plasmas

2001 ◽  
Vol 19 (1) ◽  
pp. 5-13 ◽  
Author(s):  
O. WILLI ◽  
D.H. CAMPBELL ◽  
A. SCHIAVI ◽  
M. BORGHESI ◽  
M. GALIMBERTI ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Picosecond Laser ◽  
Thin Foil ◽  
Nanosecond Laser Pulse ◽  
Nanosecond Laser ◽  
Pulse Delay ◽  
X Ray ◽  
X Ray Imaging ◽  
Underdense Plasmas ◽  
Foil Target

Detailed investigations of the propagation of an ultraintense picosecond laser pulse through preformed plasmas have been carried out. An underdense plasma with peak density around 0.1nc was generated by exploding a thin foil target with an intense nanosecond laser pulse. The formation of plasma channels with an ultraintense laser pulse due to ponderomotive expulsion of elections and the subsequent Coulomb explosion were investigated. The laser transmission through underdense plasmas was measured for a picosecond pulse at intensities above 1019 W/cm2 with and without a plasma channel preformed with an ultraintense prepulse. The energy transmitted through the plasma increased from the few percent transmittance measured in absence of the preformed channel to almost 100% transmission with the channelling to main pulse delay at around 100 ps. The propagation of a relativistic laser pulse through overdense plasmas was also investigated. A well-characterized plasma with an electron density up to 8nc was generated by soft X-ray irradiation of a low-density foam target. The propagation of the laser pulse was observed via X-ray imaging and monitoring the energy transmission through the plasma. Evidence of collimated laser transport was obtained.

Electron kinetic theory approach for sub-nanosecond laser pulse heating

2000 ◽  
Vol 214 (10) ◽  
pp. 1273-1284 ◽  
Author(s):  
B S Yilbas ◽  
S Z Shuja
Keyword(s):  
Laser Pulse ◽  
Kinetic Theory ◽  
Temperature Rise ◽  
Pulse Heating ◽  
Equation Model ◽  
Nanosecond Laser Pulse ◽  
Nanosecond Laser ◽  
Level Energy ◽  
Theory Approach ◽  
Heating Model

Laser short-pulse heating initiates non-equilibrium thermodynamic processes in the surface vicinity of solid substrates that are subjected to the pulse heating. The Fourier heating model, however, overestimates the temperature rise in this region. Consequently, it becomes essential to consider a heating model employing a microscopic level energy exchange mechanism in the surface vicinity. In the present study, electron kinetic theory, Fourier theory (one-equation model) and a two-equation model are introduced for sub-nanosecond laser heating pulses. The effect of laser pulse intensity on the temperature rise is also considered. The equations resulting from the models are solved numerically for gold and chromium substrates. The predictions are validated for a triangular pulse and a silicon substrate. It is found that electron kinetic theory and a two-equation model both predict lower temperatures in the surface vicinity at early heating times. As the pulse heating progresses, the predictions of both models converge to the result of a one-equation model.

Laser-induced transient structure and stress in a platinum(111) crystal studied by time-resolved X-ray diffraction

1999 ◽  
Vol 32 (1) ◽  
pp. 82-88 ◽  
Author(s):  
P. Chen ◽  
I. V. Tomov ◽  
P. M. Rentzepis
Keyword(s):  
Structural Changes ◽  
Lattice Strain ◽  
Pulse Heating ◽  
High Spatial Resolution ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
X Ray ◽  
Maximum Value ◽  
Laser Pulse Heating ◽  
Transient Structure

Nanosecond time-resolved X-ray diffraction has been employed to study the transient structure deformation of a Pt(111) crystal induced by laser pulse heating. A direct-imaging X-ray CCD system with high spatial resolution allowed the detection of structural changes of the order of 10−3 Å. The time evolution of lattice strain was measured with 12 ns resolution. The lattice spacings were found to suffer a transient change from 2.2653 to 2.2695 (10) Å, and the strain reached its maximum value 10 ns after laser irradiation.

Effect of a fiber-capillary structure on nanosecond laser pulse propulsion

2017 ◽  
Vol 124 (1) ◽  
Author(s):  
Haichao Yu ◽  
Lugui Cui ◽  
Kai Zhang ◽  
Jun Yang ◽  
Hanyang Li
Keyword(s):  
Laser Pulse ◽  
Nanosecond Laser Pulse ◽  
Nanosecond Laser ◽  
Capillary Structure
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