Generation of high energy density by fs-laser-induced confined microexplosion
Confined microexplosion produced by a tightly focused fs-laser pulse inside transparent material proved to be an efficient and inexpensive method for achieving high energy density up to several MJ per cm ^3 in the laboratory table-top experiments. First studies already confirmed the generation of TP...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2013-01-01
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| Series: | New Journal of Physics |
| Online Access: | https://doi.org/10.1088/1367-2630/15/2/025018 |
| _version_ | 1827874465513472000 |
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| author | E G Gamaly L Rapp V Roppo S Juodkazis A V Rode |
| author_facet | E G Gamaly L Rapp V Roppo S Juodkazis A V Rode |
| author_sort | E G Gamaly |
| collection | DOAJ |
| description | Confined microexplosion produced by a tightly focused fs-laser pulse inside transparent material proved to be an efficient and inexpensive method for achieving high energy density up to several MJ per cm ^3 in the laboratory table-top experiments. First studies already confirmed the generation of TPa-range pressure, the formation of novel super-dense material phases and revealed an unexpected phenomenon of spatial separation of ions with different masses in hot non-equilibrium plasma of confined microexplosion. In this paper, we show that the intense focused pulse propagation accompanied by a gradual increase of ionization nonlinearity changes the profile and spectrum of the pulse. We demonstrate that the motion of the ionization front in the direction opposite to the pulse propagation reduces the absorbed energy density. The voids in our experiments with fused silica produced by the microexplosion-generated pressure above Young's modulus indicate, however, that laser fluence up to 50 times above the ionization threshold is effectively absorbed in the bulk of the material. The analysis shows that the ion separation is enhanced in the non-ideal plasma of microexplosion. These findings open new avenues for the studies of high-pressure material transformations and warm dense matter conditions by confined microexplosion produced by intense fs-laser. |
| first_indexed | 2024-03-12T16:52:41Z |
| format | Article |
| id | doaj.art-76a4bb4b825d4d0dafd8442f592387b8 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:52:41Z |
| publishDate | 2013-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-76a4bb4b825d4d0dafd8442f592387b82023-08-08T11:04:59ZengIOP PublishingNew Journal of Physics1367-26302013-01-0115202501810.1088/1367-2630/15/2/025018Generation of high energy density by fs-laser-induced confined microexplosionE G Gamaly0L Rapp1V Roppo2S Juodkazis3A V Rode4Laser Physics Centre, Research School of Physics and Engineering, The Australian National University , Canberra, ACT 0200, AustraliaLaser Physics Centre, Research School of Physics and Engineering, The Australian National University , Canberra, ACT 0200, AustraliaLaser Physics Centre, Research School of Physics and Engineering, The Australian National University , Canberra, ACT 0200, AustraliaSwinburne University of Technology , Hawthorn, VIC 3122, AustraliaLaser Physics Centre, Research School of Physics and Engineering, The Australian National University , Canberra, ACT 0200, AustraliaConfined microexplosion produced by a tightly focused fs-laser pulse inside transparent material proved to be an efficient and inexpensive method for achieving high energy density up to several MJ per cm ^3 in the laboratory table-top experiments. First studies already confirmed the generation of TPa-range pressure, the formation of novel super-dense material phases and revealed an unexpected phenomenon of spatial separation of ions with different masses in hot non-equilibrium plasma of confined microexplosion. In this paper, we show that the intense focused pulse propagation accompanied by a gradual increase of ionization nonlinearity changes the profile and spectrum of the pulse. We demonstrate that the motion of the ionization front in the direction opposite to the pulse propagation reduces the absorbed energy density. The voids in our experiments with fused silica produced by the microexplosion-generated pressure above Young's modulus indicate, however, that laser fluence up to 50 times above the ionization threshold is effectively absorbed in the bulk of the material. The analysis shows that the ion separation is enhanced in the non-ideal plasma of microexplosion. These findings open new avenues for the studies of high-pressure material transformations and warm dense matter conditions by confined microexplosion produced by intense fs-laser.https://doi.org/10.1088/1367-2630/15/2/025018 |
| spellingShingle | E G Gamaly L Rapp V Roppo S Juodkazis A V Rode Generation of high energy density by fs-laser-induced confined microexplosion New Journal of Physics |
| title | Generation of high energy density by fs-laser-induced confined microexplosion |
| title_full | Generation of high energy density by fs-laser-induced confined microexplosion |
| title_fullStr | Generation of high energy density by fs-laser-induced confined microexplosion |
| title_full_unstemmed | Generation of high energy density by fs-laser-induced confined microexplosion |
| title_short | Generation of high energy density by fs-laser-induced confined microexplosion |
| title_sort | generation of high energy density by fs laser induced confined microexplosion |
| url | https://doi.org/10.1088/1367-2630/15/2/025018 |
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