Longitudinal shaping of plasma waveguides using diffractive axicons for laser wakefield acceleration
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2025
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866910855856128000 |
|---|---|
| author | Tripathi, N. Miao, B. Sloss, A. Rockafellow, E. Shrock, J. E. Hancock, S. W. Milchberg, H. M. |
| author_facet | Tripathi, N. Miao, B. Sloss, A. Rockafellow, E. Shrock, J. E. Hancock, S. W. Milchberg, H. M. |
| contents | New techniques for the optical generation of plasma waveguides -- optical fibres for ultra-intense light pulses -- have become vital to the advancement of multi-GeV laser wakefield acceleration. Here, we demonstrate the fabrication and characterization of a transmissive eight-level logarithmic diffractive axicon (LDA) for the generation of meter-scale plasma waveguides. These LDAs enable the formation of a Bessel-like beam with controllable start and end locations of the focal line and near-constant intensity on axis. We present measurements of the Bessel-like focal profile produced by the LDA, and of the leading end of the plasma column generated by it. One important feature is the formation of a funnel-mouthed plasma channel entrance that can act as waveguide coupler. We also compare the diffraction efficiency of our 8-level LDA to 4-level and binary versions, with measurements comparing well to theory. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_01786 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Longitudinal shaping of plasma waveguides using diffractive axicons for laser wakefield acceleration Tripathi, N. Miao, B. Sloss, A. Rockafellow, E. Shrock, J. E. Hancock, S. W. Milchberg, H. M. Plasma Physics Accelerator Physics Optics New techniques for the optical generation of plasma waveguides -- optical fibres for ultra-intense light pulses -- have become vital to the advancement of multi-GeV laser wakefield acceleration. Here, we demonstrate the fabrication and characterization of a transmissive eight-level logarithmic diffractive axicon (LDA) for the generation of meter-scale plasma waveguides. These LDAs enable the formation of a Bessel-like beam with controllable start and end locations of the focal line and near-constant intensity on axis. We present measurements of the Bessel-like focal profile produced by the LDA, and of the leading end of the plasma column generated by it. One important feature is the formation of a funnel-mouthed plasma channel entrance that can act as waveguide coupler. We also compare the diffraction efficiency of our 8-level LDA to 4-level and binary versions, with measurements comparing well to theory. |
| title | Longitudinal shaping of plasma waveguides using diffractive axicons for laser wakefield acceleration |
| topic | Plasma Physics Accelerator Physics Optics |
| url | https://arxiv.org/abs/2503.01786 |