Imperial College London
Alternate

Professor Roland A Smith

Faculty of Natural Sciences, Department of Physics

Professor of Laser Physics
 
 
 
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Contact

 

+44 (0)20 7594 7866r.a.smith Website

 
 
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Location

 

745Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Robinson:2017:10.1038/s41598-017-01063-1,
author = {Robinson, TS and Consoli, F and Giltrap, S and Eardley, S and Hicks, G and Ditter, E and Ettlinger, O and Stuart, N and Notley, M and De, Angelis R and Najmudin, Z and Smith, R},
doi = {10.1038/s41598-017-01063-1},
journal = {Scientific Reports},
title = {Low-noise time-resolved optical sensing of electromagnetic pulses from petawatt laser-matter interactions},
url = {http://dx.doi.org/10.1038/s41598-017-01063-1},
volume = {7},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We report on the development and deployment of an optical diagnostic for single-shot measurement of the electric-field components of electromagnetic pulses from high-intensity laser-matter interactions in a high-noise environment. The electro-optic Pockels effect in KDP crystals was used to measure transient electric fields using a geometry easily modifiable for magnetic field detection via Faraday rotation. Using dielectric sensors and an optical fibre-based readout ensures minimal field perturbations compared to conductive probes and greatly limits unwanted electrical pickup between probe and recording system. The device was tested at the Vulcan Petawatt facility with 1020 W cm−2 peak intensities, the first time such a diagnostic has been used in this regime. The probe crystals were located ~1.25 m from target and did not require direct view of the source plasma. The measured signals compare favourably with previously reported studies from Vulcan, in terms of the maximum measured intra-crystal field of 10.9 kV/m, signal duration and detected frequency content which was found to match the interaction chamber’s horizontal-plane fundamental harmonics of 76 and 101 MHz. Methods for improving the diagnostic for future use are also discussed in detail. Orthogonal optical probes offer a low-noise alternative for direct simultaneous measurement of each vector field component.
AU  - Robinson,TS
AU  - Consoli,F
AU  - Giltrap,S
AU  - Eardley,S
AU  - Hicks,G
AU  - Ditter,E
AU  - Ettlinger,O
AU  - Stuart,N
AU  - Notley,M
AU  - De,Angelis R
AU  - Najmudin,Z
AU  - Smith,R
DO  - 10.1038/s41598-017-01063-1
PY  - 2017///
SN  - 2045-2322
TI  - Low-noise time-resolved optical sensing of electromagnetic pulses from petawatt laser-matter interactions
T2  - Scientific Reports
UR  - http://dx.doi.org/10.1038/s41598-017-01063-1
UR  - http://hdl.handle.net/10044/1/45819
VL  - 7
ER  -
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