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Dr Gregor H. Welsh

Research Fellow

Physics

Publications

An ultra-high gain and efficient amplifier based on Raman amplification in plasma
Vieux G., Cipiccia S., Grant D. W., Lemos N., Grant P., Ciocarlan C., Ersfeld B., Hur M. S., Lepipas P., Manahan G. G., Raj G., Reboredo Gil D., Subiel A., Welsh G. H., Wiggins S. M., Yoffe S. R., Farmer J. P., Aniculaesei C., Brunetti E., Yang X., Heathcote R., Nersisyan G., Lewis C. L. S., Pukhov A., Dias J. M., Jaroszynski D. A.
Scientific Reports Vol 7, pp. 1-10, (2017)
http://dx.doi.org/10.1038/s41598-017-01783-4
Laser-plasma generated very high energy electrons (VHEEs) in radiotherapy
Kokurewicz K., Welsh G. H., Brunetti E., Wiggins S. M., Boyd M., Sorensen A., Chalmers A., Schettino G., Subiel A., DesRosiers C., Jaroszynski D. A.
Proceedings of SPIE 7982, Smart Sensor Phenomena, Technology, Networks, and Systems 2011 Vol 10239, (2017)
http://dx.doi.org/10.1117/12.2271183
Wide-angle electron beams from laser-wakefield accelerators
Brunetti E., Yang X., Li F.Y., Reboredo Gil D., Welsh G.H., Cipiccia S., Ersfeld B., Grant D.W., Grant P.A., Islam M.R., Shahzad M., Tooley M.P., Vieux G., Wiggins S.M., Sheng Z.M., Jaroszynski D.A.
Proceedings of SPIE 7982, Smart Sensor Phenomena, Technology, Networks, and Systems 2011 Vol 10240, pp. 102400P-102400P-12, (2017)
http://dx.doi.org/10.1117/12.2269314
Challenges of dosimetry of ultra-short pulsed very high energy electron beams
Subiel Anna, Moskvin Vadim, Welsh Gregor H., Cipiccia Silvia, Reboredo David, DesRosiers Colleen, Jaroszynski Dino A.
Physica Medica, (2017)
http://dx.doi.org/10.1016/j.ejmp.2017.04.029
Three electron beams from a laser-plasma wakefield accelerator and the energy apportioning question
Yang X., Brunetti E., Reboredo Gil D., Welsh G.H., Li F.Y., Cipiccia S., Ersfeld B., Grant D.W., Grant P.A., Islam M.R., Tooley M.P., Vieux G., Wiggins S.M., Sheng Z.M., Jaroszynski D.A.
Scientific Reports Vol 7, (2017)
http://dx.doi.org/10.1038/srep43910
Laser-plasma-based space radiation reproduction in the laboratory
Hidding B., Karger O., Königstein T., Pretzler G., Manahan G. G., McKenna P., Gray R., Wilson R., Wiggins S. M., Welsh G. H., Beaton A., Delinikolas P., Jaroszynski D. A., Rosenzweig J. B., Karmakar A., Ferlet-Cavrois V., Constantino A., Muschitiello M., Daly E.
Scientific Reports Vol 7, (2017)
http://dx.doi.org/10.1038/srep42354

more publications

Professional activities

SUPA Annual Gathering 2016
Participant
25/5/2016
The Cockroft Institute
Visiting lecturer
25/11/2015
ANRC Opening Event
Participant
24/11/2015
INREX meeting, Laserlab
Participant
26/6/2015
Laser World of Photonics 2015
Participant
23/6/2015
Christmas HPL Science Community Meeting 2014
Participant
15/12/2014

more professional activities

Projects

Epsrc Doctoral Training Grant | Farrell, Paul Gerard
Jaroszynski, Dino (Principal Investigator) Welsh, Gregor (Co-investigator) Farrell, Paul Gerard (Research Co-investigator)
Period 01-Oct-2012 - 01-Oct-2015
APPLICATION OF NEXT GENERATION ACCELERATORS (DTC) | Esposito, Marco
Jaroszynski, Dino (Principal Investigator) Welsh, Gregor (Co-investigator) Esposito, Marco (Research Co-investigator)
Period 01-Oct-2012 - 14-Jul-2014
Lab in a bubble
Jaroszynski, Dino (Principal Investigator) Boyd, Marie (Co-investigator) Brunetti, Enrico (Co-investigator) Ersfeld, Bernhard (Co-investigator) Hidding, Bernhard (Co-investigator) McKenna, Paul (Co-investigator) Noble, Adam (Co-investigator) Sheng, Zheng-Ming (Co-investigator) Vieux, Gregory (Co-investigator) Welsh, Gregor (Co-investigator) Wiggins, Samuel (Co-investigator)
"The lab in a bubble project is a timely investigation of the interaction of charged particles with radiation inside and in the vicinity of relativistic plasma bubbles created by intense ultra-short laser pulses propagating in plasma. It builds on recent studies carried out by the ALPHA-X team of coherent X-ray radiation from the laser-plasma wakefield accelerator and high field effects where radiation reaction becomes important. The experimental programme will be carried out using high power lasers and investigate new areas of physics where single-particle and collective radiation reaction and quantum effects become important, and where non-linear coupling and instabilities between beams, laser, plasma and induced fields develop, which result in radiation and particle beams with unique properties. Laser-plasma interactions are central to all problems studied and understanding their complex and often highly non-linear interactions gives a way of controlling the bubble and beams therein. To investigate the rich range of physical processes, advanced theoretical and experimental methods will be applied and advantage will be taken of know-how and techniques developed by the teams. New analytical and numerical methods will be developed to enable planning and interpreting results from experiments. Advanced experimental methods and diagnostics will be developed to probe the bubble and characterise the beams and radiation. An important objective will be to apply the radiation and beams in selected proof-of-concept applications to the benefit of society.
The project is involves a large group of Collaborators and Partners, who will contribute to both theoretical and experimental work. The diverse programme is managed through a synergistic approach where there is strong linkage between work-packages, and both theoretical and experiential methodologies are applied bilaterally: experiments are informed by theory at planning and data interpretation stages, and theory is steered by the outcome of experimental studies, which results in a virtuous circle that advances understanding of the physics inside and outside the lab in a bubble. We also expect to make major advances in high field physics and the development of a new generation of compact coherent X-ray sources."
Period 01-Apr-2016 - 31-Mar-2020

more projects