Enhanced ion acceleration from transparency-driven foils demonstrated at two ultraintense laser facilities (Conference Presentation)

Nicholas P. Dover; Tim Ziegler; Stefan Assenbaum; Constantin Bernert; Stefan Bock; Florian-Emanuel Brack; Thomas E. Cowan; Emma Jane Ditter; Marco Garten; Lennart Gaus; Ilja Goethel; George S. Hicks; Hiromitsu Kiriyama; Thomas Kluge; James K. Koga; Akira Kon; Kotaro Kondo; Stephan Kraft; Florian Kroll; Hazel F. Lowe; Josefine Metzkes-Ng; Tatsuhiko Miyatake; Zulfikar Najmudin; Thomas Püschel; Martin Rehwald; Marvin Reimold; Hironao Sakaki; Hans-Peter Schlenvoigt; Keiichiro Shiokawa; Marvin E. P. Umlandt; Ulrich Schramm; Karl Zeil; Mamiko Nishiuchi

doi:10.1117/12.2669273

8 June 2023 Enhanced ion acceleration from transparency-driven foils demonstrated at two ultraintense laser facilities (Conference Presentation)

Nicholas P. Dover, Tim Ziegler, Stefan Assenbaum, Constantin Bernert, Stefan Bock, Florian-Emanuel Brack, Thomas E. Cowan, Emma Jane Ditter, Marco Garten, Lennart Gaus, Ilja Goethel, George S. Hicks, Hiromitsu Kiriyama, Thomas Kluge, James K. Koga, Akira Kon, Kotaro Kondo, Stephan Kraft, Florian Kroll, Hazel F. Lowe, Josefine Metzkes-Ng, Tatsuhiko Miyatake, Zulfikar Najmudin, Thomas Püschel, Martin Rehwald, Marvin Reimold, Hironao Sakaki, Hans-Peter Schlenvoigt, Keiichiro Shiokawa, Marvin E. P. Umlandt, Ulrich Schramm, Karl Zeil, Mamiko Nishiuchi

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Proceedings Volume PC12579, Laser Acceleration of Electrons, Protons, and Ions VII; PC125790Q (2023) https://doi.org/10.1117/12.2669273
Event: SPIE Optics + Optoelectronics, 2023, Prague, Czech Republic

Abstract

The ultrahigh laser intensities enabled by high power lasers facilitate the generation of high energy ions using accelerating gradients many million times that of conventional accelerators. The maturation of these sources relies on breakthroughs in the generated beam parameters and improved reproducibility and repetition rate. We used two independent state-of-the-art femtosecond laser systems capable of repetitive operation to accelerate protons and carbons to high energies (>50 MeV and 30 MeV/nucleon respectively) in the relativistically induced transparency (RIT) regime. We demonstrate that acceleration is optimised for different laser prepulse levels by varying the initial target thickness, relaxing laser requirements for energetic ion generation. We elucidated the acceleration dynamics with cutting-edge 3D simulation, showing a) the role of the laser prepulse in pre-expanding the target, and b) radiation pressure assisted electron expulsion from the target during relativistically induced transparency, generating a strong space charge field which rapidly accelerates ions. Our demonstration of a robust acceleration mechanism that does not require complicated targetry nor a single-shot prepulse suppressing plasma mirror is an important step forward for developing high repetition rate applications of laser driven ion sources.

Conference Presentation

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Nicholas P. Dover, Tim Ziegler, Stefan Assenbaum, Constantin Bernert, Stefan Bock, Florian-Emanuel Brack, Thomas E. Cowan, Emma Jane Ditter, Marco Garten, Lennart Gaus, Ilja Goethel, George S. Hicks, Hiromitsu Kiriyama, Thomas Kluge, James K. Koga, Akira Kon, Kotaro Kondo, Stephan Kraft, Florian Kroll, Hazel F. Lowe, Josefine Metzkes-Ng, Tatsuhiko Miyatake, Zulfikar Najmudin, Thomas Püschel, Martin Rehwald, Marvin Reimold, Hironao Sakaki, Hans-Peter Schlenvoigt, Keiichiro Shiokawa, Marvin E. P. Umlandt, Ulrich Schramm, Karl Zeil, and Mamiko Nishiuchi "Enhanced ion acceleration from transparency-driven foils demonstrated at two ultraintense laser facilities (Conference Presentation)", Proc. SPIE PC12579, Laser Acceleration of Electrons, Protons, and Ions VII, PC125790Q (8 June 2023); https://doi.org/10.1117/12.2669273

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KEYWORDS

Ions

Ion lasers

Pulsed laser operation

Transparency

Laser energy

Laser irradiation

Laser systems engineering

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