Marangoni Convection Induced Ripple on Grazing Incidence Liquid Metal Mirror (GILMM) Used for Laser Inertial Fusion Energy
A spatial variation of temperature in the sodium film on the surface of the grazing incidence liquid metal mirror (GILMM) will give rise to convection due to the temperature dependent variation in surface tension. This is called thermal capillary convection or the Marangoni effect and causes the surface to have ripples or waves. This note estimates the magnitude of this effect and finds, with care, design parameters can be chosen to make the resulting ripples sufficiently small so that a laser beam can be focused on a target of 1/4 mm spot size at 30 m distance, for example. Smaller spot sizes are discussed.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 15013419
- Report Number(s):
- UCRL-ID-145529; TRN: US0600142
- Country of Publication:
- United States
- Language:
- English
Similar Records
Grazing incidence liquid metal mirrors (GILMM) as the final optics for laser inertial fusion energy power plants
Grazing incidence liquid metal mirrors (GILMM) for radiation hardened final optics for laser inertial fusion energy power plants
Marangoni convection in radiating fluids
Technical Report
·
Fri Jun 25 00:00:00 EDT 1999
·
OSTI ID:15013419
Grazing incidence liquid metal mirrors (GILMM) for radiation hardened final optics for laser inertial fusion energy power plants
Conference
·
Wed Jun 30 00:00:00 EDT 1999
·
OSTI ID:15013419
Marangoni convection in radiating fluids
Conference
·
Thu Jan 01 00:00:00 EST 1987
·
OSTI ID:15013419