StarDriver: Recent Results on Beam Smoothing and 2ÃÂpe Mitigation
EIMEX Software and Consulting, 107 Siebe Dr, Fairfield CA 94534, USA
- *Corresponding Author:
- Eimerl D
EIMEX Software and Consulting
107 Siebe Dr, Fairfield CA, USA
E-mail: [email protected]
Received date: May 10, 2016; Accepted date: June 03, 2016; Published date: June 06, 2016
Citation: Eimerl D (2016) StarDriver: Recent Results on Beam Smoothing and 2ωpe Mitigation. J Laser Opt Photonics 3:130. doi:10.4172/2469-410X.1000130
Copyright: © 2016 Eimerl D. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
StarDriver was recently proposed as a highly flexible laser driver for inertial confinement fusion and high energy density physics. It envisions a laser drive consisting of very many beams at an aperture and energy where the optical technology is well-developed, used in concert to create a large scale laser driver system. In this paper we describe a StarDriver–class laser with 5120 physical beamlets disposed about the target chamber in 80 evenly spaced ports, each port containing 64 beamlets, each beamlet having about ~1.5 THz of 2D SSD bandwidth and suitable phase plates, an aperture of ~65 mm, an energy of 80 J, and frequency-converted to ~351 nm. StarDriver has many beamlets at an aperture where optical technology is well-developed, and each beamlet has energy ~100 J in a several times diffraction limited beam. The ensemble of beamlets has frequency bandwidth 2%-10%, thereby providing significant control of both hydrodynamic and laser-plasma instabilities The drive at the target is ~400 kJ, has a well-behaved low L-mode spectrum, and smooth’s very rapidly, reaching an asymptotic smoothness of <1% in less than 1 ns. We also review recent results showing that the 2ωpe instability can be significantly reduced by 20 THz bandwidth.