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In-vacuum post-compression of optical probe pulses for relativistic plasma diagnostics
- Source :
- High Power Laser Science and Engineering, Vol 12 (2024)
- Publication Year :
- 2024
- Publisher :
- Cambridge University Press, 2024.
-
Abstract
- Ultrafast optical probing is a widely used method of underdense plasma diagnostic. In relativistic plasma, the motion blur limits spatial resolution in the direction of motion. For many high-power lasers the initial pulse duration of 30–50 fs results in a 10–15 μm motion blur, which can be reduced by probe pulse post-compression. Here we used the compression after compressor approach [Phys.-Usp. 62, 1096 (2019); JINST 17 P07035 (2022)], where spectral broadening is performed in thin optical plates and is followed by reflections from negative-dispersion mirrors. Our initially low-intensity probe beam was down-collimated for a more efficient spectral broadening and higher probe-to-self-emission intensity ratio. The setup is compact, fits in a vacuum chamber and can be implemented within a short experimental time slot. We proved that the compressed pulse retained the high quality necessary for plasma probing.
Details
- Language :
- English
- ISSN :
- 20954719 and 20523289
- Volume :
- 12
- Database :
- Directory of Open Access Journals
- Journal :
- High Power Laser Science and Engineering
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.67676593d3b34026a9525338c6ee07a6
- Document Type :
- article
- Full Text :
- https://doi.org/10.1017/hpl.2024.29