Interferometric adaptive optics for high power laser pointing, wave-front control and phasing [electronic resource].
- Published:
- Washington, D.C. : United States. Dept. of Energy, 2009.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description:
- PDF-file: 19 pages; size: 2.3 Mbytes
- Additional Creators:
- Lawrence Berkeley National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access:
- Free-to-read Unrestricted online access
- Summary:
- Implementing the capability to perform fast ignition experiments, as well as, radiography experiments on the National Ignition Facility (NIF) places stringent requirements on the control of each of the beam's pointing and overall wavefront quality. One quad of the NIF beams, 4 beam pairs, will be utilized for these experiments and hydrodynamic and particle-in-cell simulations indicate that for the fast ignition experiments, these beams will be required to deliver 50% (4.0 kJ) of their total energy (7.96 kJ) within a 40 {micro}m diameter spot at the end of a fast ignition cone target. This requirement implies a stringent pointing and overall phase conjugation error budget on the adaptive optics system used to correct these beam lines. The overall encircled energy requirement is more readily met by phasing of the beams in pairs but still requires high Strehl ratios, Sr, and rms tip/tilt errors of approximately one {micro}rad. To accomplish this task we have designed an interferometric adaptive optics system capable of beam pointing, high Strehl ratio and beam phasing with a single pixilated MEMS deformable mirror and interferometric wave-front sensor. We present the design of a testbed used to evaluate the performance of this wave-front sensor below along with simulations of its expected performance level.
- Report Numbers:
- E 1.99:llnl-proc-410561
llnl-proc-410561 - Subject(s):
- Other Subject(s):
- Note:
- Published through SciTech Connect.
01/21/2009.
"llnl-proc-410561"
Presented at: SPIE Photonics West MOEMS-MEMS 2009, San Jose, CA, United States, Jan 25 - Jan 29, 2009.
Baker, K L; Bliss, E S; Barty, C J; Stappaerts, E A; Henesian, M A; Siders, C W; Homoelle, D C. - Funding Information:
- W-7405-ENG-48
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