“BEAMS”49 pages
- p. 3 …Free-Electron Laser Electron Beam Phase-Space Evolution ....................... 59
Figure 31. Recirculating-Beam FEL System ........................................................... 60…
- p. 4 …HEL Beam Pointer/Tracker ................................................................... 65
Figure 35. Basic Shared Aperture Beam Control System ......................................... 66
Figure 36…
- p. 7 …This can only be achieved via laser propulsion in
which the laser beam energy that is…
- p. 15 …By launching
spacecraft on a beam of electromagnetic radiation, researchers will have developed the
first new…
- p. 16 …The laser beam's pulse
interacts with the mirror, spreading out and focusing into an annular…
- p. 17 …1) power supply; 2) high-power (megawatt-class)
laser beam generator/transmitter using novel beam optics…
- p. 20 …is to the right and the laser beam strikes the stretched-out parabolic
mirror/propulsion section…
- p. 21 …It
requires a beam power of 0.1 to 1 MW per kg of vehicle mass…
- p. 22 …The ground-based
megawatt-class laser beam generator is state-of-the-art technology. The cost…
- p. 25 …Figure 8 illustrates the adverse beam
propagation geometry associated with ETO laser propulsion by means of…
- p. 26 …Attenuation Effects on Captured Laser Beam Power 261.
0.4
0.J
0.2
0.1…
- p. 27 …Unfortunately the demonstrated laser beam power levels for the attractive 1.62 μm
wavelength, which suffered…
- p. 28 …Beam combining
of several 1 MW (or higher) FELs can achieve a total combined beam output…
- p. 31 …Appropriate rotation of a high-energy laser beam,
emanating from a ground/sea-based laser, guides…
- p. 32 …Appropriate rotation and translation of a high-energy laser
beam, emanating from a moving aircraft, guides…
- p. 33 …But
multiple target interception within allowable time is limited by relatively long beam-
riding time needed…
- p. 37 …In this case, it is envisioned that the high-
pulsed power within high-energy laser beams…
- p. 39 …In this case, airborne laser beams at 12 km altitude will not suffer the
significant propagation…
- p. 41 …sidelobes, creates multiple beams, and steers the ensemble of the
individual beams anywhere on Earth. The…
- p. 42 …Each picosat is gravity-
gradient stable, has a dipole array facing Earth, and a broader beam…
- p. 43 …Commands for beam sweep delays are superimposed on the time delays of each
nanosat. Each nanosat…
- p. 44 …piezoelectric membrane kept flat by an electron beam in response to an optical figure
sensor. MEMS…
- p. 46 …technical issues include large wavelength and
atmospheric absorption of the laser beam.
• Carbon Monoxide (CO) Laser…
- p. 47 …125 Hz@ 20μs.
• Laser power, P = 2.5 MW/beam x 4 beams = 10 MW.
• Laser…
- p. 50 …Each power oscillator optics module transmitting a 2.5 MW beam of
10.6 μm wavelength…
- p. 52 …Adding an eight amplifier chain that the system was designed for will
increase the beam power…
- p. 53 …However,
BSSSL beam power can be scaled up further by improving presently known gain media
and…
- p. 54 …scalable
to 1 MW beam power within 2 years.
Typical solid-state lasers have the following…
- p. 55 …A new technology that enables the scaling-up of BSSSL beam power is a recently
developed…
- p. 56 …at the same time increasing the average
beam power.
Figure 21. Phase Change Materials Allow Storage…
- p. 57 …This exponential growth in beam output power is the result of many factors,
including the parallel…
- p. 58 …Microlens -O _
,:1
Incoherent Beam Combining 'Ind1vidually Incoherent Gaussian Beams i=L
Controlled
/_/Steering • ... o~bined…
- p. 59 …Neodymium
Thulium (Tm 3+), Holmium
- Range of beam wavelengths(),) produced: 0.48 μm to 2.9…
- p. 61 …Multlmode Fiber Lasers
50kW Multimode
Output beam quality BPP-1 o
M"2-33
DC EDE…
- p. 62 …The resulting laser beam photon energy depends on the
electron energy, the undulator period, and (weakly…
- p. 63 UNCLASSIFIED/ /F8~ 8FFl&I.«1k WliEii a,.klf
electron beam
( \ I,:--- ■■>ti■--
undulator
)
resonator mirror
0…
- p. 64 …The superconducting accelerator gives good
efficiency and gradient while recirculation of the electron beam recovers beam…
- p. 65 UNCLASSIFIED/ /F&~ 8FFHiil.«1k 1!181! &••kY
- K"' 1.5.t
• Electron Beam:
- Photocathode injector creates…
- p. 66 …HIGH ENERGY LASER BEAM CONTROL
··costs could be reduced to as low as $20 per kg…
- p. 67 …The typical HEL beam control system includes:++ 1) a gimbaled
beam director, 2) tracking and pointing…
- p. 68 UNCLASSIFIED//F&II. &FFiii,111!! l!llili &HI!¥
A novel new HEL beam control architecture being…
- p. 69 …HEL Beam Pointer/Tracker (courtesy of the Directed Energy Professional
Society).
In summary, this new architecture…
- p. 70 …The BILL is a solid-state, kilowatt-class laser
that measures atmospheric conditions, allowing the beam…
- p. 71 …All of these HEL beam control innovations can be quickly adapted to laser propulsion
applications with…
- p. 72 …The entire Lightcraft launch
system is comprised of a ground, sea, or airborne laser beam generator…
- p. 73 …New beam
control devices and high-power optical train combinations have a resulting beam line
that…
- p. 75 …N. (1983), "Advanced Beamed-Energy and Field Propulsion Concepts,"
BDM/W-83-225-TR, BDM Corp…
- p. 76 …N. (2001), "World Record Flights of Beam-Riding Rocket Lightcraft:
Demonstration of 'Disruptive' Propulsion Technology," AIAA…
- p. 77 …of the 6 th Int'! Symposium on Beamed Energy
Propulsion, edited by C. R. Phipps, AIP…
UNCLASSIFIED//P8"1 8PPU!lit.L 1!191!! 8HLY
[1] Forward, R. L. (1962), "Pluto: Last Stop Before the Stars," Science Digest (Aug.
issue), pp. 70-75.
[2] Kantrowitz, A. (1972), "Propulsion to Orbit by Ground-Based Lasers," Astronautics
and Aeronautics, Vol. 10, pp. 74-76.
[3] Rom, F. E., and Putre, H. A. (1972), "Laser Propulsion," NASA Technical
Memorandum TM X-2510.
[4] Pirri, A. N., and Weiss, R. F. (1972), "Laser Propulsion," AIAA Paper 72-719, AIAA
5th Fluid and Plasma Dynamics Conference, Boston, MA.
[5] Harstad, K. G. (1972), "Review of Laser-Solid Interactions and Its Possibilities for
Space Propulsion," NASA Technical Memorandum 33-578, NASA Jet Propulsion
Lab, Pasadena, CA.
[6] Pirri, A. N., Monsler, J. J., and Nebolsine, P. E. (1973), "Propulsion by Absorption
of Laser Radiation," AIAA Paper 73-624, AIAA 6th Fluid and Plasma Dynamics
Conference, Palm Springs, CA.
[7] Myrabo, L. N. (1982), "A Concept for Light-Powered Flight," AIAA/SAE/ASME 18th
Joint Propulsion Conference, Cleveland, OH.
[8] Myrabo, L. N. (1983), "Advanced Beamed-Energy and Field Propulsion Concepts,"
BDM/W-83-225-TR, BDM Corp., Final Report for CalTech and NASA-JPL, NASA
Contract NAS?-100.
[9] Myrabo, L. N., and Ing, D. (1985), The Future of Flight, Baen Books-Simon and
Schuster, New York.
[ 10] Kare, J. T., ed. ( 1987), Proc. of the SOJO/DARPA Workshop on Laser Propulsion,
CONF-860778, Vol. 1 - 3, Lawrence Livermore National Laboratory, CA.
[11] Myrabo, L. N., et. al. (1989), "Lightcraft Technology Demonstrator," Final
Technical Report, Contract No. 2073803 for Lawrence Livermore National
Laboratory and the SDIO Laser Propulsion Program.
[12] Kare, J. T. (1990), "Ground to Orbit Laser Propulsion Q Advanced Applications,"
in Vision-21: Space Travel for the Next Millennium, edited by G. Landis, NASA
Conference Publication 10059.
[13] Kare, J. T. (1990), "Laser Supported Detonation Waves and Pulsed Laser
Propulsion," in Current Topics in Shock Waves, 17th Int'I Symposium on Shock
Waves and Shock Tubes, edited by Y. W. Kim, AIP Conference Proceedings 208,
AIP Press, Melville, NY.
[14] Kare, J. T. (1990), "Pulsed Laser Propulsion for Low Cost, High Volume Launch to
Orbit," IAF Conference on Space Power, Cleveland, OH.
[15] Lawrence, R. J., et al. (1991), "System Requirements for Low-Earth-Orbit Launch
Using Laser Propulsion," in Proc. of the 6th Int'/ Conference on Emerging Nuclear
Energy Systems, SAND 91-1687C, Sandia National Laboratory, NM.
[16] Messitt, D. G., Myrabo, L. N., and Mead, F. B. (2000), "Laser Initiated Blast
Wave for Launch Vehicle Propulsion," AIAA-2000-3848, AIAA/ASME/SAE/ASEE
36 th Joint Propulsion Conference, Huntsville, AL.
[17] Myrabo, L. N., Messitt, D. G., and Mead, F. B. (1998), "Ground and Flight Tests
of a Laser Propelled Vehicle," AIAA-98-1001, AIAA 36th Aerospace Sciences
Meeting & Exhibit, Reno, NV.
[18] Mead, F. B., Myrabo, L. N., and Messitt, D. G. (1998), "Flight and Ground Tests
of a Laser-Boosted Vehicle," AIAA-98-3735, AIAA/ASME/SAE/ASEE 34 th Joint
Propulsion Conference and Exhibit, Cleveland, OH.
UNCLASSIFIED//P8"1 8PPU!l"'k lal!ii e,11.~•
71