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Chandrashekhar Janardan Joshi (born July 22, 1953, at Wai, Maharashtra, India) is an Indian–American experimental plasma physicist. He is known for his pioneering work in plasma-based particle acceleration techniques for which he won the 2006 James Clerk Maxwell Prize for Plasma Physics and the 2023 Hannes Alfvén Prize (with Pisin Chen and James Rosenzweig).

Joshi was elected a member of the National Academy of Engineering in 2014 for contributions to development of laser- and beam-driven plasma accelerators. He is currently Distinguished Professor of Electrical Engineering, the director of the Center for High Frequency Electronics and the head of the Neptune Laboratory for Advanced Accelerator Research at UCLA.

Early life and education

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Joshi had his primary education at Dravid High school, Wai. While in 9th grade, he was selected by 'Pestalozzi Children's village Trust' in England and went to England for his further studies.

He received his B.Sc. (1974) in nuclear engineering from the University of London and Ph.D. (1978) in applied physics from the University of Hull, which are both in the United Kingdom. Following a two-year stint as a research associate at the National Research Council of Canada, where he worked on laser-plasma interactions, he joined UCLA first as a researcher and became a faculty member since 1988.

Scientific contributions

At UCLA, Joshi has built a strong research group that has done pioneering work in the areas of laser-plasma instabilities, plasma-based light sources, laser fusion and basic plasma experiments. Joshi has made many fundamental contributions to the understanding of extremely nonlinear optical effects in plasmas. Most notable including his first experimental demonstration of four-wave mixing, stimulated Raman forward instability, resonant self-focusing, frequency upshifting by ionization fronts and nonlinear coupling between electron-plasma waves. His group is best known, however, for developing the field of plasma-based particle accelerators over the past three decades.

Honors and awards

Joshi is a Fellow of the APS, IEEE and UK Institute of Physics. He is also the recipient of the 1996 John Dawson Award for Excellence in Plasma Physics Research (jointly awarded with Christopher E. Clayton) as well as the 1997 USPAS Prize for Achievement in Accelerator Physics and Technology [de]. He was the APS Centennial Speaker (1999) and a Distinguished Lecturer in Plasma Physics (2001). He was elected to the National Academy of Engineering in 2014.

Citations

• John Dawson Award for Excellence in Plasma Physics Research (1996): "For their pioneering experiments in Plasma Based Accelerator Concepts; particularly for their unambiguous experimental demonstration that electrons can be accelerated to relativistic energies by the beating of two laser beams in a plasma with their frequency difference equal to the plasma frequency."
• USPAS Prize for Achievement in Accelerator Physics and Technology (1997): "For pioneering experiments on high gradient, laser-driven, plasma beat-wave acceleration."
• James Clerk Maxwell Prize for Plasma Physics (2006): "For his insight and leadership in applying plasma concepts to high energy electron and positron acceleration, and for his creative exploration of related aspects of plasma physics."
• Hannes Alfvén Prize (2023, with Pisin Chen and James Rosenzweig): "For proposing, demonstrating and conducting impressive ground-breaking experiments on plasma wakefield accelerators driven by particle beams, thus firmly establishing the new concept of plasma acceleration and their applications in the scientific community."

References

1. ^ "2006 James Clerk Maxwell Prize for Plasma Physics Recipient". American Physical Society. Retrieved 2020-03-09.
2. "Alfvén Prize | European Physical Society – Plasma Physics Division". Retrieved 2023-10-06.
3. "Joshi, Chandrashekhar — UCLA Electrical Engineering". Archived from the original on 2015-03-31. Retrieved 2015-04-15.
4. Joshi, C. J.; Corkum, P. B. (1995). "Interactions of Ultra‐Intense Laser Light with Matter". Physics Today. 48 (1): 36–43. Bibcode:1995PhT....48a..36J. doi:10.1063/1.881451. ISSN 0031-9228.
5. US 6737809, Espiau, Frederick M.; Joshi, Chandrashekhar J. & Chang, Yian, "Plasma lamp with dielectric waveguide", published 2004-05-18, assigned to Luxim Corp. 
6. Forslund, D. W.; Kindel, J. M.; Mori, W. B.; Joshi, C.; Dawson, J. M. (1985). "Two-Dimensional Simulations of Single-Frequency and Beat-Wave Laser-Plasma Heating". Physical Review Letters. 54 (6): 558–561. Bibcode:1985PhRvL..54..558F. doi:10.1103/PhysRevLett.54.558. PMID 10031551.
7. Filip, C. V.; Narang, R.; Tochitsky, S. Y.; Clayton, C. E.; Joshi, C. (2002). "Optical Kerr switching technique for the production of a picosecond, multiwavelength CO2 laser pulse". Applied Optics. 41 (18): 3743–3747. Bibcode:2002ApOpt..41.3743F. doi:10.1364/AO.41.003743. ISSN 2155-3165. PMID 12078701.
8. Modena, A.; Najmudin, Z.; Dangor, A.E.; Clayton, C.E.; Marsh, K.A.; Joshi, C.; Malka, V.; Darrow, C.B.; Danson, C. (1996). "Observation of Raman forward scattering and electron acceleration in the relativistic regime". IEEE Transactions on Plasma Science. 24 (2): 289–295. Bibcode:1996ITPS...24..289M. CiteSeerX 10.1.1.716.5882. doi:10.1109/27.509992. ISSN 1939-9375.
9. Joshi, C.; Katsouleas, T. (2003). "Plasma Accelerators at the Energy Frontier and on Tabletops". Physics Today. 56 (6): 47–53. Bibcode:2003PhT....56f..47J. doi:10.1063/1.1595054. ISSN 0031-9228.
10. Joshi, C.; Mori, W. B.; Katsouleas, T.; Dawson, J. M.; Kindel, J. M.; Forslund, D. W. (1984). "Ultrahigh gradient particle acceleration by intense laser-driven plasma density waves". Nature. 311 (5986): 525–529. Bibcode:1984Natur.311..525J. doi:10.1038/311525a0. ISSN 0028-0836. S2CID 4361301.
11. Blumenfeld, I.; Clayton, C. E.; Decker, F.-J.; Hogan, M. J.; Huang, C.; Ischebeck, R.; Iverson, R.; Joshi, C.; Katsouleas, T.; Kirby, N.; Lu, W. (2007). "Energy doubling of 42 GeV electrons in a metre-scale plasma wakefield accelerator". Nature. 445 (7129): 741–744. Bibcode:2007Natur.445..741B. doi:10.1038/nature05538. ISSN 1476-4687. PMID 17301787. S2CID 4334568.
12. ^ "1996 John Dawson Award for Excellence in Plasma Physics Research Recipient". American Physical Society. Retrieved 2020-03-09.
13. "1996 John Dawson Award for Excellence in Plasma Physics Research Recipient". American Physical Society. Retrieved 2020-03-09.
14. ^ "USPAS | About | USPAS Prize | Past Prize Winners". uspas.fnal.gov. Retrieved 2020-03-09.
15. "Professor Chandrashekhar J. Joshi". nae.edu. Retrieved April 21, 2024.

Publications

• Joshi, C. (2006). "Plasma Accelerators". Sci Am. 294 (2): 40–47. Bibcode:2006SciAm.294b..40J. doi:10.1038/scientificamerican0206-40. PMID 16478025.
• Joshi, C; Katsouleas, T. (2003). "Plasma accelerators at the energy frontier and on tabletops". Physics Today. 56 (6): 47–51. Bibcode:2003PhT....56f..47J. doi:10.1063/1.1595054.
• Joshi, C. & Malka, V. (2010). "Focus on Laser- and Beam-Driven Plasma Accelerators". New Journal of Physics. 12 (4): 045003. doi:10.1088/1367-2630/12/4/045003.
• Joshi, C.; Mori, W. B.; Katsouleas, T.; Dawson, J. M.; Kindel, J. M.; Forslund, D. W. (1984). "Ultrahigh gradient particle acceleration by intense laser-driven plasma density waves". Nature. 311 (5986): 525–529. Bibcode:1984Natur.311..525J. doi:10.1038/311525a0. S2CID 4361301.
• M. Litos; et al. (November 5, 2014). "High-efficiency acceleration of an electron beam in a plasma wakefield accelerator". Nature. 515 (7525): 92–95. Bibcode:2014Natur.515...92L. doi:10.1038/nature13882. OSTI 1463003. PMID 25373678. S2CID 4469182.
• Blumenfeld, I.; et al. (2007). "Energy doubling of 42 GeV electrons in a metre-scale plasma wakefield accelerator". Nature. 445 (7129): 741–744. Bibcode:2007Natur.445..741B. doi:10.1038/nature05538. PMID 17301787. S2CID 4334568.

• 1953 births
• Living people
• Alumni of the University of London
• Fellows of the American Physical Society
• Plasma physicists
• Indian physicists
• American people of Indian descent
• Fellows of the IEEE
• Fellows of the Institute of Physics
• Alumni of the University of Hull
• American plasma physicists
• Naturalized citizens of the United States