Abstract
High-power laser contrast is challenging to measure, especially in the real target irradiation conditions. We present a convenient and relatively simple contrast diagnostic technique based on the measurement of target specular reflectivity at full laser power. The reflectivity remains high even at intensities above l019W/cm2 in the case of a high-contrast prepulse-free laser. On the contrary, the specular reflectivity drops in the case of lower contrast, due to the beam break-up and increased absorption caused by the preformed plasma. The technique was demonstrated using three different laser systems with several contrast conditions: Astra (CLF, RAL), TiS laser at APRI, GIST, and J-KAREN (APRC, JAEA).
Original language | English |
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Title of host publication | Laser-Driven Relativistic Plasmas Applied to Science, Industry and Medicine - The 2nd International Symposium |
Pages | 7-15 |
Number of pages | 9 |
Volume | 1153 |
DOIs | |
Publication status | Published - 25 Nov 2009 |
Event | 2nd International Symposium on Laser-Driven Relativistic Plasmas Applied to Science, Industry and Medicine - Kyoto, Japan Duration: 19 Jan 2009 → 23 Jan 2009 |
Conference
Conference | 2nd International Symposium on Laser-Driven Relativistic Plasmas Applied to Science, Industry and Medicine |
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Country/Territory | Japan |
City | Kyoto |
Period | 19/01/09 → 23/01/09 |
Keywords
- contrast diagnostics
- high-power laser contrast
- relativistic laser plasma