Time-resolved diagnostics of relativistic plasma singularities

2022 Fiscal Year Annual Research Report

• Project/Area Number: 19KK0355
• Research Institution: National Institutes for Quantum Science and Technology
• Principal Investigator: PIROZHKOV Alex 国立研究開発法人量子科学技術研究開発機構, 関西光科学研究所 光量子科学研究部, 上席研究員 (00446410)
• Project Period (FY): 2020 – 2022
• Keywords: Coherent x-ray source / New imaging paradigm / BISER / Relativistic plasma / Plasma singularities

Outline of Annual Research Achievements

In Jul-Dec 2021 I visited UK and led a joint experiment on coherent x-ray emission by relativistic plasma singularities (BISER). In 2022 we analyzed the very important data for the BISER mechanism and singularity studies: (1) BISER ~2 orders of magnitude brighter than previously with similar lasers, (2) spatial-angular-spectral BISER x-ray distribution obtained with new spectrograph, (3) Kerr-gated relativistic plasma imaging. We are preparing papers (1),(2). Because of low S/N ratio and artifacts due to polarizers leakage, I am considering delaying (3) until obtaining higher-S/N data.

In 2022 I led an experiment in Japan. We shortened the optical probe from ~50 down to 18 fs and obtained high-quality relativistic plasma probing in the shadow and Schlieren modes. A paper is in preparation. We also advanced our high-resolution "Top View" imaging, improved its alignment method, and obtained a few-μm spatial and simultaneously spectral resolutions. We recorded emission at the 1st, 2nd and 3rd harmonics in the direction perpendicular to laser propagation. Data analysis is not yet completed, but this emission can potentially be originating from relativistic singularities as well.

I visited UK on 4-23 Dec 2022. We performed follow-up research, discussions on paper preparation and made plans for future collaboration.
In addition to 3 papers in 2021, in 2022 we published a refereed paper on using relativistic plasma singularities, i.e. accelerating relativistic flying mirror, in planned experiments on mimicking black hole Hawking radiation [Photonics (2022)].

Research Products

• [Int'l Joint Research] Central Laser Facility, STFC Rutherford Appleton Laboratory(英国) (2021)
  • Year and Date: 2021-07-07 – 2021-12-31 | 2022-12-042022-12-23
  • Country Name: UNITED KINGDOM
  • Counterpart Institution: Central Laser Facility, STFC Rutherford Appleton Laboratory
  • Co-investigator Overseas: Dan R. Symes
  • Department: Gemini Target Area
  • Job Title: Section Leader
• [Journal Article] AnaBHEL (Analog Black Hole Evaporation via Lasers) Experiment: Concept, Design, and Status (2022)
  • Author(s): P.Chen, G.Mourou, M.Besancon, Y.Fukuda, J-F.Glicenstein, J.Nam, C-E.Lin, K-N.Lin, S-X.Liu, Y-K.Liu, M.Kando, K.Kondo, S.Paganis, A.Pirozhkov, H.Takabe, B.Tuchming, W-P.Wang, N.Watamura, J.Wheeler, H-Y.Wu, AnaBHEL Collaboration
  • Journal Title: Photonics Volume: 9 Pages: 1003
  • DOI: 10.3390/photonics9121003
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Ultrabright laser-driven BISER coherent x-ray source (2023)
  • Author(s): A.Pirozhkov,A.Shatokhin,A.Sagisaka,K.Ogura,T.Pikuz,A.Kotov,T.Dzelzainis,A.Bierwage,Ko.Kondo,H.Ohiro,S.Lorenz,Y.-K.Liu,G.Grittani,T.Jeong,N.Nakanii,K.Huang,A.Kon,Y.Miyasaka,G.Hull,S.Dann,E.Vishnyakov,A.Kolesnikov,M.Koike,P.Chen,T.Esirkepov,J.Koga,R.Gray,A.Soloviev,E.Ragozin,S.Bulanov,S.Namba,et al.
  • Organizer: SPIE Optics + Optoelectronics Symposium, Compact Radiation Sources from EUV to Gamma-rays: Development and Applications Conference
  • Int'l Joint Research / Invited
• [Presentation] BISER and diagnostics of relativistic plasma singularities (2023)
  • Author(s): A.Pirozhkov,A.Shatokhin,A.Sagisaka,K.Ogura,T.Pikuz,A.Kotov,T.Dzelzainis,A.Bierwage,Ko.Kondo,H.Ohiro,S.Lorenz,Y.-K.Liu,G.Grittani,T.Jeong,N.Nakanii,K.Huang,A.Kon,Y.Miyasaka,G.Hull,S.Dann,E.Vishnyakov,A.Kolesnikov,M.Koike,P.Chen,T.Esirkepov,J.Koga,R.Gray,A.Soloviev,E.Ragozin,S.Bulanov,S.Namba,et al.
  • Organizer: The Optics & Photonics International Congress OPIC-2023, The 12th Advanced Lasers and Photon Sources ALPS-2023
  • Int'l Joint Research
• [Presentation] Ultrabright BISER coherent x-ray source in experiments with the Astra and J-KAREN-P lasers (2023)
  • Author(s): A.Pirozhkov,A.Shatokhin,A.Sagisaka,K.Ogura,T.Pikuz,A.Kotov,T.Dzelzainis,A.Bierwage,Ko.Kondo,H.Ohiro,S.Lorenz,Y.-K.Liu,G.Grittani,T.Jeong,N.Nakanii,K.Huang,A.Kon,Y.Miyasaka,G.Hull,S.Dann,E.Vishnyakov,A.Kolesnikov,M.Koike,P.Chen,T.Esirkepov,J.Koga,R.Gray,A.Soloviev,E.Ragozin,S.Bulanov,S.Namba,et al.
  • Organizer: JPS Spring Meeting 2023
• [Presentation] BISER experiments with the Astra and J-KAREN-P lasers (2023)
  • Author(s): A.Pirozhkov,A.Shatokhin,A.Sagisaka,K.Ogura,T.Pikuz,A.Kotov,T.Dzelzainis,A.Bierwage,Ko.Kondo,H.Ohiro,S.Lorenz,Y.-K.Liu,G.Grittani,T.Jeong,N.Nakanii,K.Huang,A.Kon,Y.Miyasaka,G.Hull,S.Dann,E.Vishnyakov,A.Kolesnikov,M.Koike,P.Chen,T.Esirkepov,J.Koga,R.Gray,A.Soloviev,E.Ragozin,S.Bulanov,S.Namba,et al.
  • Organizer: The 70th JSAP Spring Meeting 2023
• [Presentation] Ultrabright BISER coherent x-ray source driven by the Astra and J-KAREN-P lasers (2022)
  • Author(s): A.Pirozhkov,A.Shatokhin,A.Sagisaka,K.Ogura,T.Pikuz,A.Kotov,T.Dzelzainis,A.Bierwage,Ko.Kondo,H.Ohiro,S.Lorenz,Y.-K.Liu,G.Grittani,T.Jeong,N.Nakanii,K.Huang,A.Kon,Y.Miyasaka,G.Hull,S.Dann,E.Vishnyakov,A.Kolesnikov,M.Koike,P.Chen,T.Esirkepov,J.Koga,R.Gray,A.Soloviev,E.Ragozin,S.Bulanov,S.Namba,et al.
  • Organizer: Christmas Meeting of the High Power Laser User Community
  • Int'l Joint Research