FEL options for power beaming

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The demand for the output power of communication satellites has been increasing exponentially. The satellite power is generated from solar panels which collect the sunlight and convert it to electrical power. The power per satellite is limited due to the limit in the practical size of the solar panel. One way to meet the power demand is to employ multiple satellites (up to 10) per the internationally agreed-upon ``slot`` in the geosynchronous earth orbit (GEO). However, this approach is very expensive due to the high cost of sending a satellite into a GEO orbit. An alternative approach is power beaming, ... continued below

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16 p.

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Kim, K.J.; Zholents, A.A.; Zolotorev, M.S. & Vinokurov, N.A. October 1, 1997.

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Description

The demand for the output power of communication satellites has been increasing exponentially. The satellite power is generated from solar panels which collect the sunlight and convert it to electrical power. The power per satellite is limited due to the limit in the practical size of the solar panel. One way to meet the power demand is to employ multiple satellites (up to 10) per the internationally agreed-upon ``slot`` in the geosynchronous earth orbit (GEO). However, this approach is very expensive due to the high cost of sending a satellite into a GEO orbit. An alternative approach is power beaming, i.e., to illuminate the solar panels with high power, highly-directed laser beams from earth. The power beaming generates more power per satellite for the same area of the solar panel. The minimum optical beam power, interesting for power beaming application, is P{sub L} = 200kW. The wavelength is chosen to be {lambda} = 0.84 {micro}m, so that it is within one of the transmission windows of the air, and at the same time near the peak of the photo-voltaic conversion efficiency of Si, which is the commonly used material for the solar panels. Free electron lasers (FELs) are well suited for the power beaming application because they can provide high power with coherent wavefront, but without high energy density in media. In this article the authors discuss some principal issues, such as the choice of accelerator and electron gun, the choice of beam parameters, radiation hazards, technological availability, and overall efficiency and reliability of the installation. They also attempt to highlight the compromise between the cost of the primary installation, the operation cost, and the choice of technology, and its maturity. They then present several schemes for the accelerator-FEL systems based on RF accelerators. The initial electron beam accelerator up to the energy of a few MeV is more or less common for all these schemes.

Physical Description

16 p.

Notes

INIS; OSTI as DE98051525

Source

  • FEL `97: international free electron laser conference and 4. free electron laser users` workshop, Beijing (China), 18-22 Aug 1997; Other Information: DN: Also referenced as rept. no. CBP Note-238. Presented at the International FEL Conference 1997 and FEL Users` Workshop (4th), Beijing, China, 18-22 Aug 97.

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  • Other: DE98051525
  • Report No.: LBNL--40765
  • Report No.: CONF-970885--
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 642794
  • Archival Resource Key: ark:/67531/metadc692215

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  • October 1, 1997

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • April 5, 2016, 1:22 p.m.

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Kim, K.J.; Zholents, A.A.; Zolotorev, M.S. & Vinokurov, N.A. FEL options for power beaming, article, October 1, 1997; California. (digital.library.unt.edu/ark:/67531/metadc692215/: accessed August 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.