Imperial College London
Portrait Picture

DrJackHare

Faculty of Natural Sciences, Department of Physics

Academic Visitor
 
 
 
//

Contact

 

+44 (0)20 7594 5659jdhare CV

 
 
//

Location

 

739BBlackett LaboratorySouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Suttle:2021:10.1063/5.0041118,
author = {Suttle, LG and Hare, JD and Halliday, JWD and Merlini, S and Russell, DR and Tubman, ER and Valenzuela-Villaseca, V and Rozmus, W and Bruulsema, C and Lebedev, SV},
doi = {10.1063/5.0041118},
journal = {Review of Scientific Instruments},
pages = {033542--1--033542--8},
title = {Collective optical Thomson scattering in pulsed-power driven high energy density physics experiments (invited)},
url = {http://dx.doi.org/10.1063/5.0041118},
volume = {92},
year = {2021}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Optical collective Thomson scattering (TS) is used to diagnose magnetized high energy density physics experiments at the Magpie pulsedpower generator at Imperial College London. The system uses an amplified pulse from the second harmonic of a Nd:YAG laser (3 J, 8 ns, 532 nm) to probe a wide diversity of high-temperature plasma objects, with densities in the range of 1017–1019 cm−3 and temperatures between 10 eV and a few keV. The scattered light is collected from 100 μm-scale volumes within the plasmas, which are imaged onto optical fiber arrays. Multiple collection systems observe these volumes from different directions, providing simultaneous probing with different scattering K-vectors (and different associated α-parameters, typically in the range of 0.5–3), allowing independent measurements of separate velocity components of the bulk plasma flow. The fiber arrays are coupled to an imaging spectrometer with a gated intensified charge coupled device. The spectrometer is configured to view the ion-acoustic waves of the collective Thomson scattered spectrum. Fits to the spectra with the theoretical spectral density function S(K, ω) yield measurements of the local plasma temperatures and velocities. Fitting is constrained by independent measurements of the electron density from laser interferometry and the corresponding spectra for different scattering vectors.This TS diagnostic has been successfully implemented on a wide range of experiments, revealing temperature and flow velocity transitions across magnetized shocks, inside rotating plasma jets and imploding wire arrays, as well as providing direct measurements of drift velocitiesinside a magnetic reconnection current sheet.
AU  - Suttle,LG
AU  - Hare,JD
AU  - Halliday,JWD
AU  - Merlini,S
AU  - Russell,DR
AU  - Tubman,ER
AU  - Valenzuela-Villaseca,V
AU  - Rozmus,W
AU  - Bruulsema,C
AU  - Lebedev,SV
DO  - 10.1063/5.0041118
EP  - 1
PY  - 2021///
SN  - 0034-6748
SP  - 033542
TI  - Collective optical Thomson scattering in pulsed-power driven high energy density physics experiments (invited)
T2  - Review of Scientific Instruments
UR  - http://dx.doi.org/10.1063/5.0041118
UR  - https://aip.scitation.org/doi/10.1063/5.0041118
UR  - http://hdl.handle.net/10044/1/88499
VL  - 92
ER  -
Download