Final optics for laser-driven inertial fusion reactors

Woodworth, J. G.; Chase, L. L.; Guinan, M.W.; Krupke, William F.; Sooy, W. R.

doi:10.1109/fusion.1991.218705

Cited by 6 publications

(6 citation statements)

References 11 publications

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“…The wedgelets are inclined at Brewster's angle with respect to the beam direction and held at Tfo -400°C to anneal neutron generated colour centres [20]. Without this continuous annealing, fused silica would deteriorate in minutes at any practical distance from the target (in about 5 min for our baseline design, which has about 6 X lOI3 neutrons/(cm2 s) at the final optic), because optical degradation at 3w begins at about 10l6 neutrons/cm* [69].…”

Section: Final Optics Designmentioning

confidence: 99%

“…Without this continuous annealing, fused silica would deteriorate in minutes at any practical distance from the target (in about 5 min for our baseline design, which has about 6 X lOI3 neutrons/(cm2 s) at the final optic), because optical degradation at 3w begins at about 10l6 neutrons/cm* [69]. Degradation begins at even lower neutron fluences for shorter laser wavelengths; specifically, the absorptivity of fused silica is roughly 60 times larger at KrF wavelengths (248 nm) than it is at 349 nm [20]. Consequently, to keep a COE comparable to our baseline result and to avoid extremely large target chamber buildings, DPSSL*IFE results indicate that operation at 248 nm would require the temperature of the final optic to be z 1000°C.…”

Section: Final Optics Designmentioning

confidence: 99%

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A diode pumped solid state laser driver for inertial fusion energy

1996

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A comprehensive conceptual design for a diode pumped solid state laser (DPSSL) as a driver for an inertial fusion energy (IFE) power plant is presented. This design is based on recent technical advances that offer potential solutions to difficulties previously associated with the use of a laser for IFE applications. The design was selected by using a systems analysis code that optimizes a DPSSL configuration by minimizing the calculated cost of electricity (COE). The code contains the significant physics relevant to the DPSSL driver, but treats the target chamber and balance of plant costs generically using scaling relations published for the Sombrero KrF laser concept. The authors describe the physics incorporated in the code, predict DPSSL performance and its variations with changes in the major parameters, discuss IFE economics and technical risk, and identify the high leverage development efforts that can make DPSSL driven IFE plants more economically competitive. It is believed that this study is a significant advance over previous conceptual studies of DPSSLs for IFE because it incorporates a new cost effective gain medium, applies a potential solution to the 'final optics' problem, and considers the laser physics in substantially greater detail. The result is the introduction of an option for an IFE driver that has relatively low development costs and that builds upon the mature laser technology base already developed for Nova and being developed for the proposed National Ignition Facility. The baseline design of the paper has a product of laser efficiency and target gain of qG -6.6 and a COE of 8.6 centsikW .h for a 1 GW(e) plant with a target gain of 76 at 3.7 MJ.Higher qG ( 2 11) and lower COEs ( 5 6.6 centsikW. h) can be achieved with target gains twice as high.

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Section: Final Optics Designmentioning

confidence: 99%

Section: Final Optics Designmentioning

confidence: 99%

A diode pumped solid state laser driver for inertial fusion energy

1996

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“…If we evaluate the COE equation given in Sec. 3 for Pne = 1 GW, it indicates that the COE is approximately equal to a constant plus 1.5 times the TCC in G$. Using this approximation, the COE can be given by the following expression: In the above equation, the second term on the r i~t is the non-constant part of the cost of the target chamber and the BOP (where 2.14/qG is the recycled power hction for a thermal-to-electric conversion efficiency of 45%, divided by 0.96 for a 4y0 auxiliary power fraction).…”

Section: Simple Model For the Coementioning

confidence: 99%

<title>System study of a diode-pumped solid state laser driver for inertial fusion energy</title>

Orth

Payne

1995

Solid State Lasers for Application to Inertial Confinement Fusion (ICF)

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“…The optical physics bears much in common, including pumping, extraction, pulse 1 21 Flashlamus + diodes The longevity, reliability, high efficiency, architectural flexibility, and low thermal loading of diodes now allow us to design DPSSLS suitable for IFE. The estimated number of shots required over the %year lifetime of the power plant with a driver operating at 10 Hz is about lO1l0. Laser diode lifetimes are presently within reach of this goal.…”

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confidence: 99%