Temporal feedback control of high-intensity laser pulses to optimize ultrafast heating of atomic clusters

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Title: Temporal feedback control of high-intensity laser pulses to optimize ultrafast heating of atomic clusters
Authors: Streeter, M
Dann, S
Scott, JDE
Baird, C
Murphy, CD
Eardley, S
Smith, R
Rozario, S
Gruse, J
Mangles, SPD
Najmudin, Z
Tata, S
Krishnamurthy, M
Rahul, SV
Hazra, D
Pourmoussavi, P
Osterhoff, J
Hah, J
Bourgeois, N
Thornton, C
Gregory, CD
Hooker, CJ
Checkhlov, O
Hawkes, SJ
Parry, B
Marshall, V
Tang, Y
Springate, E
Rajeev, PP
Thomas, AGR
Symes, D
Item Type: Journal Article
Abstract: We describe how active feedback routines can be applied at limited repetition rate (5 Hz) to optimize high- power ( P> 10 TW) laser interactions with clustered gases. Optimization of x-ray production from an argon cluster jet, using a genetic algorithm, approximately doubled the measured energy through temporal modification of the 150 mJ driving laser pulse. This approach achieved an increased radiation yield through exploration of a multi-dimensional parameter space, without requiring detailed apriori knowledge of the complex cluster dynamics. The optimized laser pulses exhibited a slow rising edge to the intensity profile, which enhanced the laser energy coupling into the cluster medium, compared to the optimally compressed FWHM pulse (40 fs). Our work suggests that this technique can be more widely utilized for control of intense pulsed secondary radiation from petawatt-class laser systems.
Issue Date: 13-Jun-2018
Date of Acceptance: 24-Apr-2018
URI: http://hdl.handle.net/10044/1/60054
DOI: https://doi.org/10.1063/1.5027297
ISSN: 1077-3118
Publisher: AIP Publishing
Start Page: 244101-1
End Page: 244101-5
Journal / Book Title: Applied Physics Letters
Volume: 112
Issue: 24
Copyright Statement: © 2018 Author(s). This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared may be found at https://doi.org/10.1063/1.5027297
Sponsor/Funder: The Royal Society
The Royal Society
The Royal Society
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Funder's Grant Number: 516002.K501/SC/RCH/ROG
2008/R2 MANGLES
UF110105
ST/J002062/1 John Adams Inst
ST/P000835/1
ST/P002021/1
Keywords: Science & Technology
Physical Sciences
Physics, Applied
Physics
X-RAY-EMISSION
GENERATION
Applied Physics
09 Engineering
02 Physical Sciences
Publication Status: Published
Online Publication Date: 2018-06-13
Appears in Collections:Physics
Plasma Physics
Faculty of Natural Sciences



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