2022 Fiscal Year Final Research Report
Electron beam generation by spatio-temporally controlled laser wake field
| Project/Area Number |
19K20597
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 80040:Quantum beam science-related
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| Research Institution | Utsunomiya University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2023-03-31
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| Keywords | レーザー航跡場加速 / 高エネルギー密度科学 |
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| Outline of Final Research Achievements |
In this research, it was studied a new basic technology for laser wakefield acceleration that controls dephasing length by controlling the speed of the focal plane.
A laser wakefield was excited by focusing a laser pulse with an energy of 120 mJ and a pulse width of 120 fs onto a gas-jet target, and fundamental data were collected. We also investigated the self-modulated laser wake field acceleration by using a two-dimensional particle-in-cell simulation. A self-modulated laser wake field was excited by low peak power laser by using relatively high dense target.
From these results, it was confirmed that the establishment of gas target technology is important.
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| Free Research Field |
量子ビーム科学
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| Academic Significance and Societal Importance of the Research Achievements |
レーザー航跡場は非常に高い電場を励起できることから，次世代加速器技術として注目されている．また，航跡場中の加速位相は極めて短く，加速場に捕捉された電子バンチは極短バンチとなる．このような電子バンチは物質・材料，医療・生命科学研究などへの応用も期待できるが，レーザー装置が大型，複雑になるなどの問題点がある．本申請では低出力レーザーによって，制御性の高い航跡場を励起する手法に関して基礎研究を行なった．シミュレーションや実験を行い，ターゲット開発が重要であるという理解を得た．また，当初目標とは異なる手法として，自己変調レーザー航跡場加速の可能性と THz 電磁波による追加速の可能性に関して調査した．
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