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1. Investigation and modeling of optics damage in high-power laser systems caused by light backscattered in plasma at the target.

Author

Chapman, T., Michel, P., Di Nicola, J.-M. G., Berger, R. L., Whitman, P. K., Moody, J. D., Manes, K. R., Spaeth, M. L., Belyaev, M. A., Thomas, C. A., and MacGowan, B. J.

Subjects
LASER-plasma interactions, BRILLOUIN scattering, PLASMA interactions, LASER beams, LASER plasmas
Abstract

High-power laser facilities may be restricted in operations by the risk of damage to optics due to the backscattering of laser light from the intended target. A portion of this backscattered light can re-enter the beam line and at sufficient fluence may damage (burn) optical apparatus. Here, the observed cumulative burn pattern on mirrors at the National Ignition Facility (NIF) due to stimulated Brillouin scattering (SBS) at the target is explained using detailed simulations. Our methodology involves using a measurement of a phase plate profile installed at the NIF to provide the laser input to a three-dimensional simulation of laser-plasma interaction in a target typical of that fielded at the NIF. Light scattered by SBS at the target is then followed back to the final aperture of the beam line, back through the phase plate, and to a mirror where damage typically occurs. We find that mirror damage patterns are largely dictated by the phase imprint of the phase plate on the returning SBS light. Our simulations show that the instantaneous SBS signal at the mirror varies on a picosecond time scale and is also highly modulated in space. Temporal averaging of the simulated SBS light pattern on the mirror reveals a pattern in close agreement with the experimentally observed damage. Understanding these burn patterns (distribution, modulation depth) may lead to future phase plate designs that limit damage throughout the optics assembly of high-powered laser facilities. [ABSTRACT FROM AUTHOR]

Published
2019
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2. Demonstration of high-energy 2[omega] (526.5 nm) operation on the National Ignition Facility Laser System

Author

Heestand, G. M., Haynam, C. A., Wegner, P. J., Bowers, M. W., Dixit, S. N., Erbert, G. V., Henesian, M. A., Hermann, M. R., Jancaitis, K. S., Knittel, K., Kohut, T., Lindl, J. D., Manes, K. R., Marshall, C. D., Mehta, N. C., Menapace, J., Moses, E., Murray, J. R., Nostrand, M. C., Orth, C. D., Patterson, R., Sacks, R. A., Saunders, R., Shaw, M. J., Spaeth, M., Sutton, S. B., Williams, W. H., Widmayer, C. C., White, R. K., Whitman, P. K., Yang, S. T., and Van Wonterghem, B. M.

Subjects
Laser beams -- Properties, Frequency converters -- Research, Astronomy, Physics
Abstract

A single beamline of the National Ignition Facility (NIF) has been operated at a wavelength of 526.5 nm (2[omega]) by frequency converting the fundamental 1053 nm (l[omega]) wavelength with an 18.2 mm thick type-I potassium dihydrogen phosphate (KDP) second-harmonic generator (SHG) crystal. Second-harmonic energies of up to 17.9 kJ were measured at the final optics focal plane with a conversion efficiency of 82%. For a similarly configured 192-beam NIF, this scales to a total 2w energy of 3.4 MJ full NIF equivalent (FNE). OCIS codes: 140.0140, 140.3070, 140.3515, 140.3530.

Published
2008

3. The first target experiments on the National Ignition Facility

Author

Landen, O. L., Glenzer, S. H., Froula, D. H., Dewald, E. L., Suter, L. J., Schneider, M. B., Hinkel, D. E., Fernandez, J. C., Kline, J. L., Goldman, S. R., Braun, D. G., Celliers, P. M., Moon, S. J., Robey, H. S., Lanier, N. E., Glendinning, S. G., Blue, B. E., Wilde, B. H., Jones, O. S., Schein, J., Divol, L., Kalantar, D. H., Campbell, K. M., Holder, J. P., McDonald, J. W., Niemann, C., Mackinnon, A. J., Collins, G. W., Bradley, D. K., Eggert, J. H., Hicks, D. G., Gregori, G., Kirkwood, R. K., Young, B. K., Foster, J. M., Hansen, J. F., Perry, T. S., Munro, D. H., Baldis, H. A., Grim, G. P., Heeter, R. F., Hegelich, M. B., Montgomery, D. S., Rochau, G. A., Olson, R. E., Turner, R. E., Workman, J. B., Berger, R. L., Cohen, B. I., Kruer, W. L., Langdon, A. B., Langer, S. H., Meezan, N. B., Rose, H. A., Still, C. H., Williams, E. A., Dodd, E. S., Edwards, M. J., Monteil, M.-C., Stevenson, R. M., Thomas, B. R., Coker, R. F., Magelssen, G. R., Rosen, P. A., Stry, P. E., Woods, D., Weber, S. V., Young, P. E., Alvarez, S., Armstrong, G., Bahr, R., Bourgade, J.-L., Bower, D., Celeste, J., Chrisp, M., Compton, S., Cox, J., Constantin, C., Costa, R., Duncan, J., Ellis, A., Emig, J., Gautier, C., Greenwood, A., Griffith, R., Holdner, F., Holtmeier, G., Hargrove, D., James, T., Kamperschroer, J., Kimbrough, J., Landon, M., Lee, F. D., Malone, R., May, M., Montelongo, S., Moody, J., Ng, E., Nikitin, A., Pellinen, D., Piston, K., Poole, M., Rekow, V., Rhodes, M., Shepherd, R., Shiromizu, S., Voloshin, D., Warrick, A., Watts, P., Weber, F., Young, P., Arnold, P., Atherton, L., Bardsley, G., Bonanno, R., Borger, T., Bowers, M., Bryant, R., Buckman, S., Burkhart, S., Cooper, F., Dixit, S. N., Erbert, G., Eder, D. C., Ehrlich, R. E., Felker, B., Fornes, J., Frieders, G., Gardner, S., Gates, C., Gonzalez, M., Grace, S., Hall, T., Haynam, C. A., Heestand, G., Henesian, M. A., Hermann, M., Hermes, G., Huber, S., Jancaitis, K., Johnson, S., Kauffman, B., Kelleher, T., Kohut, T., Koniges, A. E., Labiak, T., Latray, D., Lee, A., Lund, D., Mahavandi, S., Manes, K. R., Marshall, C., McBride, J., McCarville, T., McGrew, L., Menapace, J., Mertens, E., Murray, J., Neumann, J., Newton, M., Opsahl, P., Padilla, E., Parham, T., Parrish, G., Petty, C., Polk, M., Powell, C., Reinbachs, I., Rinnert, R., Riordan, B., Ross, G., Robert, V., Tobin, M., Sailors, S., Saunders, R., Schmitt, M., Shaw, M., Singh, M., Spaeth, M., Stephens, A., Tietbohl, G., Tuck, J., Van Wonterghem, B. M., Vidal, R., Wegner, P. J., Whitman, P., Williams, K., Winward, K., Work, K., Wallace, R., Nobile, A., Bono, M., Day, B., Elliott, J., Hatch, D., Louis, H., Manzenares, R., O'Brien, D., Papin, P., Pierce, T., Rivera, G., Ruppe, J., Sandoval, D., Schmidt, D., Valdez, L., Zapata, K., MacGowan, B. J., Eckart, M. J., Hsing, W. W., Springer, P. T., Hammel, B. A., Moses, E. I., and Miller, G. H.

Published
2007
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4. Study of self-diffraction from laser generated plasma gratings in the nanosecond regime

Author

Schrauth, S. E., primary, Colaitis, A., additional, Luthi, R. L., additional, Plummer, R. C. W., additional, Hollingsworth, W. G., additional, Carr, C. W., additional, Norton, M. A., additional, Wallace, R. J., additional, Hamza, A. V., additional, MacGowan, B. J., additional, Shaw, M. J., additional, Spaeth, M. L., additional, Manes, K. R., additional, Michel, P., additional, and Di Nicola, J.-M., additional

Published
2019
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8. Damage Mechanisms Avoided or Managed for NIF Large Optics

Author

Manes, K. R., primary, Spaeth, M. L., additional, Adams, J. J., additional, Bowers, M. W., additional, Bude, J. D., additional, Carr, C. W., additional, Conder, A. D., additional, Cross, D. A., additional, Demos, S. G., additional, Nicola, J. M. G. Di, additional, Dixit, S. N., additional, Feigenbaum, E., additional, Finucane, R. G., additional, Guss, G. M., additional, Henesian, M. A., additional, Honig, J., additional, Kalantar, D. H., additional, Kegelmeyer, L. M., additional, Liao, Z. M., additional, MacGowan, B. J., additional, Matthews, M. J., additional, McCandless, K. P., additional, Mehta, N. C., additional, Miller, P. E., additional, Negres, R. A., additional, Norton, M. A., additional, Nostrand, M. C., additional, Orth, C. D., additional, Sacks, R. A., additional, Shaw, M. J., additional, Siegel, L. R., additional, Stolz, C. J., additional, Suratwala, T. I., additional, Trenholme, J. B., additional, Wegner, P. J., additional, Whitman, P. K., additional, Widmayer, C. C., additional, and Yang, S. T., additional

Published
2016
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10. Description of the NIF Laser

Author

Spaeth, M. L., primary, Manes, K. R., additional, Kalantar, D. H., additional, Miller, P. E., additional, Heebner, J. E., additional, Bliss, E. S., additional, Spec, D. R., additional, Parham, T. G., additional, Whitman, P. K., additional, Wegner, P. J., additional, Baisden, P. A., additional, Menapace, J. A., additional, Bowers, M. W., additional, Cohen, S. J., additional, Suratwala, T. I., additional, Di Nicola, J. M., additional, Newton, M. A., additional, Adams, J. J., additional, Trenholme, J. B., additional, Finucane, R. G., additional, Bonanno, R. E., additional, Rardin, D. C., additional, Arnold, P. A., additional, Dixit, S. N., additional, Erbert, G. V., additional, Erlandson, A. C., additional, Fair, J. E., additional, Feigenbaum, E., additional, Gourdin, W. H., additional, Hawley, R. A., additional, Honig, J., additional, House, R. K., additional, Jancaitis, K. S., additional, LaFortune, K. N., additional, Larson, D. W., additional, Le Galloudec, B. J., additional, Lindl, J. D., additional, MacGowan, B. J., additional, Marshall, C. D., additional, McCandless, K. P., additional, McCracken, R. W., additional, Montesanti, R. C., additional, Moses, E. I., additional, Nostrand, M. C., additional, Pryatel, J. A., additional, Roberts, V. S., additional, Rodriguez, S. B., additional, Rowe, A. W., additional, Sacks, R. A., additional, Salmon, J. T., additional, Shaw, M. J., additional, Sommer, S., additional, Stolz, C. J., additional, Tietbohl, G. L., additional, Widmayer, C. C., additional, and Zacharias, R., additional

Published
2016
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11. The first experiments on the National Ignition Facility

Author

Landen, O. L., Glenzer, S., Froula, D., Dewald, E., Suter, L. J., Schneider, M., Hinkel, D., Fernandez, J., Kline, J., Goldman, S., Braun, D., Celliers, P., Moon, S., Robey, H., Lanier, N., Glendinning, G., Blue, B., Wilde, B., Jones, O., Schein, J., Divol, L., Kalantar, D., Campbell, K., Holder, J., McDonald, J., Niemann, C., Mackinnon, A., Collins, R., Bradley, D., Eggert, J., Hicks, D., Gregori, G., Kirkwood, R., Young, B., Foster, J., Hansen, F., Perry, T., Munro, D., Baldis, H., Grim, G., Heeter, R., Hegelich, B., Montgomery, D., Rochau, G., Olson, R., Turner, R., Workman, J., Berger, R., Cohen, B., Kruer, W., Langdon, B., Langer, S., Meezan, N., Rose, H., Still, B., Williams, E., Dodd, E., Edwards, J., Monteil, M. C., Stevenson, M., Thomas, B., Coker, R., Magelssen, G., Rosen, P., Stry, P., Woods, D., Weber, S., Alvarez, S., Armstrong, G., Bahr, R., Bourgade, J. L., Bower, D., Celeste, J., Chrisp, M., Compton, S., Cox, J., Constantin, C., Costa, R., Duncan, J., Ellis, A., Emig, J., Gautier, C., Greenwood, A., Griffith, R., Holdner, F., Holtmeier, G., Hargrove, D., James, T., Kamperschroer, J., Kimbrough, J., Landon, M., Lee, D., Malone, R., May, M., Montelongo, S., Moody, J., Ng, E., Nikitin, A., Pellinen, D., Piston, K., Poole, M., Rekow, V., Rhodes, M., Shepherd, R., Shiromizu, S., Voloshin, D., Warrick, A., Watts, P., Weber, F., Young, P., Arnold, P., Atherton, L., Bardsley, G., Bonanno, R., Borger, T., Bowers, M., Bryant, R., Buckman, S., Burkhart, S., Cooper, F., Dixit, S., Erbert, G., Eder, D., Ehrlich, B., Felker, B., Fornes, J., Frieders, G., Gardner, S., Gates, C., Gonzalez, M., Grace, S., Hall, T., Haynam, C., Heestand, G., Henesian, M., Hermann, M., Hermes, G., Huber, S., Jancaitis, K., Johnson, S., Kauffman, B., Kelleher, T., Kohut, T., Koniges, A. E., Labiak, T., Latray, D., Lee, A., Lund, D., Mahavandi, S., Manes, K. R., Marshall, C., McBride, J., McCarville, T., McGrew, L., Menapace, J., Mertens, E., Murray, J., Neumann, J., Newton, M., Opsahl, P., Padilla, E., Parham, T., Parrish, G., Petty, C., Polk, M., Powell, C., Reinbachs, I., Rinnert, R., Riordan, B., Ross, G., Robert, V., Tobin, M., Sailors, S., Saunders, R., Schmitt, M., Shaw, M., Singh, M., Spaeth, M., Stephens, A., Tietbohl, G., Tuck, J., Van Wonterghem, B., Vidal, R., Wegner, P., Whitman, P., Williams, K., Winward, K., Work, K., Wallace, R., Nobile, A., Bono, M., Day, B., Elliott, J., Hatch, D., Louis, H., Manzenares, R., O'Brien, D., Papin, P., Pierce, T., Rivera, G., Ruppe, J., Sandoval, D., Schmidt, D., Valdez, L., Zapata, K., MacGowan, B., Eckart, M., Hsing, W., Springer, P., Hammel, B., Moses, E., Miller, G., Landen, O. L., Glenzer, S., Froula, D., Dewald, E., Suter, L. J., Schneider, M., Hinkel, D., Fernandez, J., Kline, J., Goldman, S., Braun, D., Celliers, P., Moon, S., Robey, H., Lanier, N., Glendinning, G., Blue, B., Wilde, B., Jones, O., Schein, J., Divol, L., Kalantar, D., Campbell, K., Holder, J., McDonald, J., Niemann, C., Mackinnon, A., Collins, R., Bradley, D., Eggert, J., Hicks, D., Gregori, G., Kirkwood, R., Young, B., Foster, J., Hansen, F., Perry, T., Munro, D., Baldis, H., Grim, G., Heeter, R., Hegelich, B., Montgomery, D., Rochau, G., Olson, R., Turner, R., Workman, J., Berger, R., Cohen, B., Kruer, W., Langdon, B., Langer, S., Meezan, N., Rose, H., Still, B., Williams, E., Dodd, E., Edwards, J., Monteil, M. C., Stevenson, M., Thomas, B., Coker, R., Magelssen, G., Rosen, P., Stry, P., Woods, D., Weber, S., Alvarez, S., Armstrong, G., Bahr, R., Bourgade, J. L., Bower, D., Celeste, J., Chrisp, M., Compton, S., Cox, J., Constantin, C., Costa, R., Duncan, J., Ellis, A., Emig, J., Gautier, C., Greenwood, A., Griffith, R., Holdner, F., Holtmeier, G., Hargrove, D., James, T., Kamperschroer, J., Kimbrough, J., Landon, M., Lee, D., Malone, R., May, M., Montelongo, S., Moody, J., Ng, E., Nikitin, A., Pellinen, D., Piston, K., Poole, M., Rekow, V., Rhodes, M., Shepherd, R., Shiromizu, S., Voloshin, D., Warrick, A., Watts, P., Weber, F., Young, P., Arnold, P., Atherton, L., Bardsley, G., Bonanno, R., Borger, T., Bowers, M., Bryant, R., Buckman, S., Burkhart, S., Cooper, F., Dixit, S., Erbert, G., Eder, D., Ehrlich, B., Felker, B., Fornes, J., Frieders, G., Gardner, S., Gates, C., Gonzalez, M., Grace, S., Hall, T., Haynam, C., Heestand, G., Henesian, M., Hermann, M., Hermes, G., Huber, S., Jancaitis, K., Johnson, S., Kauffman, B., Kelleher, T., Kohut, T., Koniges, A. E., Labiak, T., Latray, D., Lee, A., Lund, D., Mahavandi, S., Manes, K. R., Marshall, C., McBride, J., McCarville, T., McGrew, L., Menapace, J., Mertens, E., Murray, J., Neumann, J., Newton, M., Opsahl, P., Padilla, E., Parham, T., Parrish, G., Petty, C., Polk, M., Powell, C., Reinbachs, I., Rinnert, R., Riordan, B., Ross, G., Robert, V., Tobin, M., Sailors, S., Saunders, R., Schmitt, M., Shaw, M., Singh, M., Spaeth, M., Stephens, A., Tietbohl, G., Tuck, J., Van Wonterghem, B., Vidal, R., Wegner, P., Whitman, P., Williams, K., Winward, K., Work, K., Wallace, R., Nobile, A., Bono, M., Day, B., Elliott, J., Hatch, D., Louis, H., Manzenares, R., O'Brien, D., Papin, P., Pierce, T., Rivera, G., Ruppe, J., Sandoval, D., Schmidt, D., Valdez, L., Zapata, K., MacGowan, B., Eckart, M., Hsing, W., Springer, P., Hammel, B., Moses, E., and Miller, G.

Abstract

A first set of shock propagation, laser-plasma interaction, hohlraum energetics and hydrodynamic experiments have been performed using the first 4 beams of the National Ignition Facility (NIF), in support of indirect drive inertial confinement fusion (ICF) and high energy density physics.

Published
2006

12. Comparison of Nd:phosphate glass, Yb:YAG and Yb:S-FAP laser beamlines for laser inertial fusion energy (LIFE) [Invited]

Author

Erlandson, A. C., primary, Aceves, S. M., additional, Bayramian, A. J., additional, Bullington, A. L., additional, Beach, R. J., additional, Boley, C. D., additional, Caird, J. A., additional, Deri, R. J., additional, Dunne, A. M., additional, Flowers, D. L., additional, Henesian, M. A., additional, Manes, K. R., additional, Moses, E. I., additional, Rana, S. I., additional, Schaffers, K. I., additional, Spaeth, M. L., additional, Stolz, C. J., additional, and Telford, S. J., additional

Published
2011
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13. The national ignition facility: Status and performance of the world’s largest laser system for the high energy density and inertial confinement fusion

Author

Haynam, C.A., primary, Wegner, P. J., additional, Heestand, G. M., additional, Moses, E., additional, Sacks, R. A., additional, Bowers, M. W., additional, Dixit, S. N., additional, Erbert, G. V., additional, Henesian, M. A., additional, Hermann, M. R., additional, Jancaitis, K. S., additional, Knittel, K., additional, Kohut, T., additional, Manes, K. R., additional, Marshall, C. D., additional, Mehta, N. C., additional, Menapace, J., additional, Murray, J. R., additional, Nostrand, M. C., additional, Orth, C. D., additional, Patterson, R., additional, Saunders, R., additional, Shaw, M. J., additional, Spaeth, M., additional, Sutton, S. B., additional, Williams, W. H., additional, Widmayer, C. C., additional, White, R. K., additional, Yang, S. T., additional, and Van Wonterghem, B. M., additional

Published
2008
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14. The National Ignition Facility 2007 laser performance status

Author

Haynam, C A, primary, Sacks, R A, additional, Wegner, P J, additional, Bowers, M W, additional, Dixit, S N, additional, Erbert, G V, additional, Heestand, G M, additional, Henesian, M A, additional, Hermann, M R, additional, Jancaitis, K S, additional, Manes, K R, additional, Marshall, C D, additional, Mehta, N C, additional, Menapace, J, additional, Nostrand, M C, additional, Orth, C D, additional, Shaw, M J, additional, Sutton, S B, additional, Williams, W H, additional, Widmayer, C C, additional, White, R K, additional, Yang, S T, additional, and Wonterghem, B M Van, additional

Published
2008
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15. Laser energetics and propagation modelling for the NIF

Author

Sacks, R A, primary, Elliott, A B, additional, Goderre, G P, additional, Haynam, C A, additional, Henesian, M A, additional, House, R K, additional, Manes, K R, additional, Mehta, N C, additional, Shaw, M J, additional, Widmayer, C C, additional, and Williams, W H, additional

Published
2008
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16. National Ignition Facility laser performance status

Author

Haynam, C. A., primary, Wegner, P. J., additional, Auerbach, J. M., additional, Bowers, M. W., additional, Dixit, S. N., additional, Erbert, G. V., additional, Heestand, G. M., additional, Henesian, M. A., additional, Hermann, M. R., additional, Jancaitis, K. S., additional, Manes, K. R., additional, Marshall, C. D., additional, Mehta, N. C., additional, Menapace, J., additional, Moses, E., additional, Murray, J. R., additional, Nostrand, M. C., additional, Orth, C. D., additional, Patterson, R., additional, Sacks, R. A., additional, Shaw, M. J., additional, Spaeth, M., additional, Sutton, S. B., additional, Williams, W. H., additional, Widmayer, C. C., additional, White, R. K., additional, Yang, S. T., additional, and Van Wonterghem, B. M., additional

Published
2007
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18. The first target experiments on the National Ignition Facility

Author

Landen, O. L., primary, Glenzer, S. H., additional, Froula, D. H., additional, Dewald, E. L., additional, Suter, L. J., additional, Schneider, M. B., additional, Hinkel, D. E., additional, Fernandez, J. C., additional, Kline, J. L., additional, Goldman, S. R., additional, Braun, D. G., additional, Celliers, P. M., additional, Moon, S. J., additional, Robey, H. S., additional, Lanier, N. E., additional, Glendinning, S. G., additional, Blue, B. E., additional, Wilde, B. H., additional, Jones, O. S., additional, Schein, J., additional, Divol, L., additional, Kalantar, D. H., additional, Campbell, K. M., additional, Holder, J. P., additional, McDonald, J. W., additional, Niemann, C., additional, Mackinnon, A. J., additional, Collins, G. W., additional, Bradley, D. K., additional, Eggert, J. H., additional, Hicks, D. G., additional, Gregori, G., additional, Kirkwood, R. K., additional, Young, B. K., additional, Foster, J. M., additional, Hansen, J. F., additional, Perry, T. S., additional, Munro, D. H., additional, Baldis, H. A., additional, Grim, G. P., additional, Heeter, R. F., additional, Hegelich, M. B., additional, Montgomery, D. S., additional, Rochau, G. A., additional, Olson, R. E., additional, Turner, R. E., additional, Workman, J. B., additional, Berger, R. L., additional, Cohen, B. I., additional, Kruer, W. L., additional, Langdon, A. B., additional, Langer, S. H., additional, Meezan, N. B., additional, Rose, H. A., additional, Still, C. H., additional, Williams, E. A., additional, Dodd, E. S., additional, Edwards, M. J., additional, Monteil, M.-C., additional, Stevenson, R. M., additional, Thomas, B. R., additional, Coker, R. F., additional, Magelssen, G. R., additional, Rosen, P. A., additional, Stry, P. E., additional, Woods, D., additional, Weber, S. V., additional, Young, P. E., additional, Alvarez, S., additional, Armstrong, G., additional, Bahr, R., additional, Bourgade, J.-L., additional, Bower, D., additional, Celeste, J., additional, Chrisp, M., additional, Compton, S., additional, Cox, J., additional, Constantin, C., additional, Costa, R., additional, Duncan, J., additional, Ellis, A., additional, Emig, J., additional, Gautier, C., additional, Greenwood, A., additional, Griffith, R., additional, Holdner, F., additional, Holtmeier, G., additional, Hargrove, D., additional, James, T., additional, Kamperschroer, J., additional, Kimbrough, J., additional, Landon, M., additional, Lee, F. D., additional, Malone, R., additional, May, M., additional, Montelongo, S., additional, Moody, J., additional, Ng, E., additional, Nikitin, A., additional, Pellinen, D., additional, Piston, K., additional, Poole, M., additional, Rekow, V., additional, Rhodes, M., additional, Shepherd, R., additional, Shiromizu, S., additional, Voloshin, D., additional, Warrick, A., additional, Watts, P., additional, Weber, F., additional, Young, P., additional, Arnold, P., additional, Atherton, L., additional, Bardsley, G., additional, Bonanno, R., additional, Borger, T., additional, Bowers, M., additional, Bryant, R., additional, Buckman, S., additional, Burkhart, S., additional, Cooper, F., additional, Dixit, S. N., additional, Erbert, G., additional, Eder, D. C., additional, Ehrlich, R. E., additional, Felker, B., additional, Fornes, J., additional, Frieders, G., additional, Gardner, S., additional, Gates, C., additional, Gonzalez, M., additional, Grace, S., additional, Hall, T., additional, Haynam, C. A., additional, Heestand, G., additional, Henesian, M. A., additional, Hermann, M., additional, Hermes, G., additional, Huber, S., additional, Jancaitis, K., additional, Johnson, S., additional, Kauffman, B., additional, Kelleher, T., additional, Kohut, T., additional, Koniges, A. E., additional, Labiak, T., additional, Latray, D., additional, Lee, A., additional, Lund, D., additional, Mahavandi, S., additional, Manes, K. R., additional, Marshall, C., additional, McBride, J., additional, McCarville, T., additional, McGrew, L., additional, Menapace, J., additional, Mertens, E., additional, Murray, J., additional, Neumann, J., additional, Newton, M., additional, Opsahl, P., additional, Padilla, E., additional, Parham, T., additional, Parrish, G., additional, Petty, C., additional, Polk, M., additional, Powell, C., additional, Reinbachs, I., additional, Rinnert, R., additional, Riordan, B., additional, Ross, G., additional, Robert, V., additional, Tobin, M., additional, Sailors, S., additional, Saunders, R., additional, Schmitt, M., additional, Shaw, M., additional, Singh, M., additional, Spaeth, M., additional, Stephens, A., additional, Tietbohl, G., additional, Tuck, J., additional, Van Wonterghem, B. M., additional, Vidal, R., additional, Wegner, P. J., additional, Whitman, P., additional, Williams, K., additional, Winward, K., additional, Work, K., additional, Wallace, R., additional, Nobile, A., additional, Bono, M., additional, Day, B., additional, Elliott, J., additional, Hatch, D., additional, Louis, H., additional, Manzenares, R., additional, O'Brien, D., additional, Papin, P., additional, Pierce, T., additional, Rivera, G., additional, Ruppe, J., additional, Sandoval, D., additional, Schmidt, D., additional, Valdez, L., additional, Zapata, K., additional, MacGowan, B. J., additional, Eckart, M. J., additional, Hsing, W. W., additional, Springer, P. T., additional, Hammel, B. A., additional, Moses, E. I., additional, and Miller, G. H., additional

Published
2006
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19. Hard x-ray and hot electron environment in vacuum hohlraums at the National Ignition Facility

Author

McDonald, J. W., primary, Suter, L. J., additional, Landen, O. L., additional, Foster, J. M., additional, Celeste, J. R., additional, Holder, J. P., additional, Dewald, E. L., additional, Schneider, M. B., additional, Hinkel, D. E., additional, Kauffman, R. L., additional, Atherton, L. J., additional, Bonanno, R. E., additional, Dixit, S. N., additional, Eder, D. C., additional, Haynam, C. A., additional, Kalantar, D. H., additional, Koniges, A. E., additional, Lee, F. D., additional, MacGowan, B. J., additional, Manes, K. R., additional, Munro, D. H., additional, Murray, J. R., additional, Shaw, M. J., additional, Stevenson, R. M., additional, Parham, T. G., additional, Van Wonterghem, B. M., additional, Wallace, R. J., additional, Wegner, P. J., additional, Whitman, P. K., additional, Young, B. K., additional, Hammel, B. A., additional, and Moses, E. I., additional

Published
2006
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20. Radiation-Driven Hydrodynamics of High-ZHohlraums on the National Ignition Facility

Author

Dewald, E. L., primary, Suter, L. J., additional, Landen, O. L., additional, Holder, J. P., additional, Schein, J., additional, Lee, F. D., additional, Campbell, K. M., additional, Weber, F. A., additional, Pellinen, D. G., additional, Schneider, M. B., additional, Celeste, J. R., additional, McDonald, J. W., additional, Foster, J. M., additional, Niemann, C., additional, Mackinnon, A. J., additional, Glenzer, S. H., additional, Young, B. K., additional, Haynam, C. A., additional, Shaw, M. J., additional, Turner, R. E., additional, Froula, D., additional, Kauffman, R. L., additional, Thomas, B. R., additional, Atherton, L. J., additional, Bonanno, R. E., additional, Dixit, S. N., additional, Eder, D. C., additional, Holtmeier, G., additional, Kalantar, D. H., additional, Koniges, A. E., additional, MacGowan, B. J., additional, Manes, K. R., additional, Munro, D. H., additional, Murray, J. R., additional, Parham, T. G., additional, Piston, K., additional, Van Wonterghem, B. M., additional, Wallace, R. J., additional, Wegner, P. J., additional, Whitman, P. K., additional, Hammel, B. A., additional, and Moses, E. I., additional

Published
2005
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21. Laser coupling to reduced-scale hohlraum targets at the Early Light Program of the National Ignition Facility

Author

Hinkel, D. E., primary, Schneider, M. B., additional, Baldis, H. A., additional, Bonanno, G., additional, Bower, D. E., additional, Campbell, K. M., additional, Celeste, J. R., additional, Compton, S., additional, Costa, R., additional, Dewald, E. L., additional, Dixit, S. N., additional, Eckart, M. J., additional, Eder, D. C., additional, Edwards, M. J., additional, Ellis, A., additional, Emig, J. A., additional, Froula, D. H., additional, Glenzer, S. H., additional, Hargrove, D., additional, Haynam, C. A., additional, Heeter, R. F., additional, Henesian, M. A., additional, Holder, J. P., additional, Holtmeier, G., additional, James, L., additional, Jancaitis, K. S., additional, Kalantar, D. H., additional, Kamperschroer, J. H., additional, Kauffman, R. L., additional, Kimbrough, J., additional, Kirkwood, R. K., additional, Koniges, A. E., additional, Landen, O. L., additional, Landon, M., additional, Langdon, A. B., additional, Lee, F. D., additional, MacGowan, B. J., additional, Mackinnon, A. J., additional, Manes, K. R., additional, Marshall, C., additional, May, M. J., additional, McDonald, J. W., additional, Menapace, J., additional, Moses, E. I., additional, Munro, D. H., additional, Murray, J. R., additional, Niemann, C., additional, Pellinen, D., additional, Rekow, V., additional, Ruppe, J. A., additional, Schein, J., additional, Shepherd, R., additional, Singh, M. S., additional, Springer, P. T., additional, Still, C. H., additional, Suter, L. J., additional, Tietbohl, G. L., additional, Turner, R. E., additional, Van Wonterghem, B. M., additional, Wallace, R. J., additional, Warrick, A., additional, Watts, P., additional, Weber, F., additional, Wegner, P. J., additional, Williams, E. A., additional, Young, B. K., additional, and Young, P. E., additional

Published
2005
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22. Laser coupling to reduced-scale targets at NIF Early Light

Author

Hinkel, D. E., Schneider, M. B., Young, B. K., Holder, J. P., Langdon, A. B., Baldis, H. A., Bonanno, G., Bower, D. E., Bruns, H. C., Campbell, K. M., Celeste, J. R., Compton, S., Costa, R. L., Dewald, E. L., Dixit, S. N., Eckart, M. J., Eder, D. C., Edwards, M. J., Ellis, A. D., Emig, J. A., Froula, D. H., Glenzer, S. H., Hargrove, D., Haynam, C. A., Heeter, R. F., Henesian, M. A., Holtmeier, G., James, D. L., Jancaitis, K. S., Kalantar, D. H., Kamperschroer, J. H., Kauffman, R. L., Kimbrough, J., Kirkwood, R. K., Koniges, A. E., Landen, O. L., Landon, M., Lee, F. D., MacGowan, B. J., Mackinnon, A. J., Manes, K. R., Marshall, C., May, M. J., McDonald, J. W., Menapace, J., Moses, S. E.I., Munro, D. H., Murray, J. R., Niemann, C., Pellinen, D., Power, G. D., Rekow, V., Ruppe, J. A., Schein, J., Shepherd, R., Singh, M. S., Springer, P. T., Still, C. H., Suter, L. J., Tietbohl, G. L., Turner, R. E., VanWonterghem, B. M., Wallace, R. J., Warrick, A., Watts, P., Weber, F., Wegner, P. J., Williams, E. A., Young, P. E., Hinkel, D. E., Schneider, M. B., Young, B. K., Holder, J. P., Langdon, A. B., Baldis, H. A., Bonanno, G., Bower, D. E., Bruns, H. C., Campbell, K. M., Celeste, J. R., Compton, S., Costa, R. L., Dewald, E. L., Dixit, S. N., Eckart, M. J., Eder, D. C., Edwards, M. J., Ellis, A. D., Emig, J. A., Froula, D. H., Glenzer, S. H., Hargrove, D., Haynam, C. A., Heeter, R. F., Henesian, M. A., Holtmeier, G., James, D. L., Jancaitis, K. S., Kalantar, D. H., Kamperschroer, J. H., Kauffman, R. L., Kimbrough, J., Kirkwood, R. K., Koniges, A. E., Landen, O. L., Landon, M., Lee, F. D., MacGowan, B. J., Mackinnon, A. J., Manes, K. R., Marshall, C., May, M. J., McDonald, J. W., Menapace, J., Moses, S. E.I., Munro, D. H., Murray, J. R., Niemann, C., Pellinen, D., Power, G. D., Rekow, V., Ruppe, J. A., Schein, J., Shepherd, R., Singh, M. S., Springer, P. T., Still, C. H., Suter, L. J., Tietbohl, G. L., Turner, R. E., VanWonterghem, B. M., Wallace, R. J., Warrick, A., Watts, P., Weber, F., Wegner, P. J., Williams, E. A., and Young, P. E.

Abstract

Deposition of maximum laser energy into a small, high-Z enclosure in a short laser pulse creates a hot environment. Such targets were recently included in an experimental campaign using the first four of the 192 beams of the National Ignition Facility [J. A. Paisner, E. M. Campbell, and W. J. Hogan, Fusion Technology 26, 755 (1994)], under construction at the University of California Lawrence Livermore National Laboratory. These targets demonstrate good laser coupling, reaching a radiation temperature of 340 eV. In addition, the Raman backscatter spectrum contains features consistent with Brillouin backscatter of Raman forward scatter [A. B. Langdon and D. E. Hinkel, Physical Review Letters 89, 015003 (2002)]. Also, NIF Early Light diagnostics indicate that 20% of the direct backscatter from these reduced-scale targets is in the polarization orthogonal to that of the incident light.

Published
2006
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23. X-ray flux and X-ray burnthrough experiments on reduced-scale targets at the NIF and OMEGA lasers

Author

Schneider, M. B., Hinkel, D. E., Young, B. K., Holder, J. P., Langdon, A. B., Baldis, H. A., Bahr, R., Bower, D. E., Bruns, H. C., Campbell, K. M., Celeste, J. R., Compton, S., Constantin, C. G., Costa, R. L., Dewald, E. L., Dixit, S. N., Eckart, M. J., Eder, D. C., Edwards, M. J., Ellis, A. D., Emig, J. A., Froula, D. H., Glebov, V., Glenzer, S. H., Hargrove, D., Haynam, C. A., Heeter, R. F., Henesian, M. A., Holtmeier, G., James, D. L., Jancaitis, K. S., Kalantar, D. H., Kamperschroer, J. H., Kauffman, R. L., Kimbrough, J., Kirkwood, R., Koniges, A. E., Landen, O. L., Landon, M., Lee, F. D., MacGowan, B. J., Mackinnon, A. J., Manes, K. R., Marshall, C., May, M. J., McDonald, J. W., Menapace, J., Moon, S. J., Moses, E. I., Munro, D. H., Murray, J. R., Niemann, C., Pellinen, D., Piston, K., Power, G. D., Rekow, V., Roberts, S., Ruppe, J. A., Schein, J., Seka, W., Shepherd, R., Singh, M. S., Sorce, C., Springer, P. T., Still, C. H., Stoeckl, C., Suter, L. J., Tietbohl, G. L., Turner, R. E., Van Wonterghem, B. M., Wallace, R. J., Warrick, A., Watts, P., Weber, F., Wegner, P. J., Williams, E. A., Young, P. E., Schneider, M. B., Hinkel, D. E., Young, B. K., Holder, J. P., Langdon, A. B., Baldis, H. A., Bahr, R., Bower, D. E., Bruns, H. C., Campbell, K. M., Celeste, J. R., Compton, S., Constantin, C. G., Costa, R. L., Dewald, E. L., Dixit, S. N., Eckart, M. J., Eder, D. C., Edwards, M. J., Ellis, A. D., Emig, J. A., Froula, D. H., Glebov, V., Glenzer, S. H., Hargrove, D., Haynam, C. A., Heeter, R. F., Henesian, M. A., Holtmeier, G., James, D. L., Jancaitis, K. S., Kalantar, D. H., Kamperschroer, J. H., Kauffman, R. L., Kimbrough, J., Kirkwood, R., Koniges, A. E., Landen, O. L., Landon, M., Lee, F. D., MacGowan, B. J., Mackinnon, A. J., Manes, K. R., Marshall, C., May, M. J., McDonald, J. W., Menapace, J., Moon, S. J., Moses, E. I., Munro, D. H., Murray, J. R., Niemann, C., Pellinen, D., Piston, K., Power, G. D., Rekow, V., Roberts, S., Ruppe, J. A., Schein, J., Seka, W., Shepherd, R., Singh, M. S., Sorce, C., Springer, P. T., Still, C. H., Stoeckl, C., Suter, L. J., Tietbohl, G. L., Turner, R. E., Van Wonterghem, B. M., Wallace, R. J., Warrick, A., Watts, P., Weber, F., Wegner, P. J., Williams, E. A., and Young, P. E.

Abstract

An experimental campaign to maximize radiation drive in small-scale hohlraums has been carried out at the National Ignition Facility (NIF) at the Lawerence Livermore National Laboratory (Livermore, CA, USA) and at the OMEGA laser at the Laboratory for Laser Energetics (Rochester, NY, USA). The small-scale hohlraums, laser energy, laser pulse, and diagnostics were similar at both facilities but the geometries were very different. The NIF experiments used on-axis laser beams whereas the OMEGA experiments used 19 beams in three beam cones. In the cases when the lasers coupled well and produced similar radiation drive, images of x-ray burnthrough and laser deposition indicate the pattern of plasma filling is very different.

Published
2006
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27. Erratum: ‘‘Studies of Raman scattering from overdense targets irradiated by several kilojoules of 0.53 μm laser light’’ [Phys. Fluids 31, 3130 (1988)]

Author

Drake, R. P., primary, Turner, R. E., additional, Lasinski, B. F., additional, Williams, E. A., additional, Phillion, D. W., additional, Estabrook, K. G., additional, Kruer, W. L., additional, Campbell, E. M., additional, Manes, K. R., additional, Hildum, J. S., additional, and Johnston, T. W., additional

Published
1990
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29. Hard X-ray and hot electron environment in vacuum hohlraums at NIF

Author

McDonald, J. W., Suter, L. J., Landen, O. L., Foster, J. M., Celeste, J. R., Holder, J. P., Dewald, E. L., Schneider, M. B., Hinkel, D. E., Kauffman, R. L., Atherton, L. J., Bonanno, R. E., Dixit, S. N., Eder, D. C., Haynam, C. A., Kalantar, D. H., Koniges, A. E., Lee, F. D., MacGowan, B. J., Manes, K. R., Munro, D. H., Murray, J. R., Shaw, M. J., Stevenson, R. M., Parham, T. G., Van Wonterghem, B. M., Wallace, R. J., Wegner, P. J., Whitman, P. K., Young, B. K., Hammel, B. A., Moses, E. I., McDonald, J. W., Suter, L. J., Landen, O. L., Foster, J. M., Celeste, J. R., Holder, J. P., Dewald, E. L., Schneider, M. B., Hinkel, D. E., Kauffman, R. L., Atherton, L. J., Bonanno, R. E., Dixit, S. N., Eder, D. C., Haynam, C. A., Kalantar, D. H., Koniges, A. E., Lee, F. D., MacGowan, B. J., Manes, K. R., Munro, D. H., Murray, J. R., Shaw, M. J., Stevenson, R. M., Parham, T. G., Van Wonterghem, B. M., Wallace, R. J., Wegner, P. J., Whitman, P. K., Young, B. K., Hammel, B. A., and Moses, E. I.

Abstract

Time resolved hard x-ray images (hv> 9 keV) and time integrated hard x-ray spectra (hv= 18-150 keV) from vacuum hohlraums irradiated with four 351 nm wavelength NIF laser beams are presented as a function of hohlraum size and laser power and duration. The hard x-ray images and spectra provide insight into the time evolution of the hohlraum plasma filling and the production of hot electrons. The fraction of laser energy detected as hot electrons (f$_{\rm hot})$shows correlation with both laser intensity and with an analytic plasma filling model.

Published
2006
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30. Novette facility: activation and experimental results.

Author

Manes, K. R., Barr, O. C., Bliss, E. S., Drake, R. P., Godwin, R. O., Gritton, D. G., Hildum, J. S., Holloway, F. W., Hurley, C. A., Johnson, B. C., Kuizenga, D. J., Merritt, B., Ozarski, R. G., Reinecker, F., Severyn, J. R., Speck, D. R., Summers, M. A., Suski, G. J., and Wallerstein, E. P.

Published
1985
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31. Studies of Raman scattering from overdense targets irradiated by several kilojoules of 0.53 μm laser light.

Author

Drake, R. P., Turner, R. E., Lasinski, B. F., Williams, E. A., Phillion, D. W., Estabrook, K. G., Kruer, W. L., Campbell, E. M., Manes, K. R., Hildum, J. S., and Johnston, T. W.

Subjects
RAMAN effect, PLASMA gases
Abstract

In this paper a study of stimulated Raman scattering (SRS) from relatively planar plasmas irradiated with short-wavelength (0.53 µm) laser light is reported. The Novette Laser Facility [Laser Part. Beams 3, 173 (1985)] produced several kilojoules of light in 1 nsec, which allowed it to irradiate a large spot with enough intensity to produce significant Raman scattering. These experiments measured the fluence, angular distribution, spectrum, and timing of the Raman light, as a function of the average laser intensity. Reductions in the Raman fluence at low laser intensity are attributed to collisional damping. The measured SRS fluence was larger than that predicted from convective amplification of bremsstrahlung noise, as calculated using the average properties of the laser beam and the plasma. Possible contributions to the observed scattering from enhanced noise, Raman scattering within filaments, and the absolute Raman instability at density extrema are discussed. [ABSTRACT FROM AUTHOR]

Published
1988
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32. National Ignition Facility wavefront requirements and optical architecture

Author

Spaeth, M. L., Manes, K. R., Widmayer, C. C., Williams, W. H., Whitman, P. K., Henesian, M. A., Stowers, I. F., and Honig, J.

Abstract

With the first four of its eventual 192 beams now executing shots and generating more than 100 kJ of laser energy at its primary wavelength of 1.06 m, the National Ignition Facility (NIF) at the Lawrence Livermore National Laboratory is already the world’s largest and most energetic laser. The optical system performance requirements that are in place for NIF are derived from the goals of the missions it is designed to serve. These missions include inertial confinement fusion (ICF) research and the study of matter at extreme energy densities and pressures. These mission requirements have led to a design strategy for achieving high-quality focusable energy and power from the laser and to specifications on optics that are important for an ICF laser. The design of NIF utilizes a multipass architecture with a single large amplifier type that provides high gain, high extraction efficiency, and high packing density. We have taken a systems engineering approach to the practical implementation of this design that specifies the wavefront parameters of individual optics to achieve the desired cumulative performance of the laser beamline. This paper provides a detailed look at the causes and effects of performance degradation in large laser systems and how NIF has been designed to overcome these effects. We also present results of spot size performance measurements that have validated many of the early design decisions that have been incorporated in the NIF laser architecture. © 2004 Society of Photo-Optical Instrumentation Engineers.

Published
2004
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33. Statistical optics applied to high-power glass lasers

Author

Manes, K. R. and Simmons, W. W.

Abstract

Multiterawatt laser systems, particularly the Novette system at the Lawrence Livermore National Laboratory, are simulated using statistical-optics techniques. The results are compared with experimental observations.

Published
1985

34. Light-plasma interaction studies with high-power glass laser

Author

Manes, K. R., Ahlstrom, H. G., Haas, R. A., and Holzrichter, J. F.

Abstract

High-intensity (10^13–10^17 W/cm^2) 1.06 µm laser light absorption experiments with spherical and planar targets suggest that inverse bremsstrahlung absorption is not the dominant absorption mechanism. Evidence is presented that resonance absorption together with ponderomotive force effects such as filamentation and density profile steepening strongly influence the laser light absorption.

Published
1977

36. Novette: a 0.53-pm laser-target interaction system

Author

Manes, K. R., primary, Speck, D. R., additional, Suski, G. J., additional, Barr, O. G., additional, Gritton, D. G., additional, Hilduy, J. S., additional, JohnSon, B. C., additional, Kuizenga, O. J., additional, Patton, H. G., additional, and Thompson, C. E., additional

Published
1983
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38. Compression of Polymer-Coated Laser-Fusion Targets to Ten Times Liquid DT Density

Author

Auerbach, J. M., primary, Mead, W. C., additional, Campbell, E. M., additional, Matthews, D. L., additional, Bailey, D. S., additional, Hatcher, C. W., additional, Koppel, L. N., additional, Lane, S. M., additional, Lee, P. H. Y., additional, Manes, K. R., additional, McClellan, G., additional, Phillion, D. W., additional, Price, R. H., additional, Rupert, V. C., additional, Slivinsky, V. W., additional, and Swift, C. D., additional

Published
1980
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39. X-ray laser experiments at the Novetle laser facility

Author

Matthews, D. L., primary, Hagelstein, P., additional, Toor, A., additional, Kauffman, R., additional, Wang, C., additional, Leipelt, G., additional, Price, R., additional, Tirsell, G., additional, Lee, P., additional, Ozarski, R., additional, Underwood, J., additional, Weaver, T., additional, Wengert, J., additional, Heaton, G., additional, Hatcher, W., additional, Eckhardt, M., additional, Gerassimenko, M., additional, CampBell, E. M., additional, Speck, D. R., additional, Seppala, L., additional, Manes, K. R., additional, Pleasance, L., additional, and Coleman, L., additional

Published
1983
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46. X-ray backlighting characterization experiments performed with laser wavelengths of 1.06, 0.53, and 0.35 µm

Author

Matthews, D. L., primary, Attwood, David T., additional, Campbell, E. M., additional, Ceglio, N., additional, Coleman, L. W., additional, Hermes, G., additional, Kauffman, R., additional, Koppel, L., additional, Lee, R., additional, Manes, K. R., additional, Rupert, V., additional, Slivinsky, V., additional, Turner, R. E., additional, and Ze, F., additional

Published
1982
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48. Demonstration of high-energy 2 omega (526.5 nm) operation on the National Ignition Facility Laser System.

Author

Heestand GM, Haynam CA, Wegner PJ, Bowers MW, Dixit SN, Erbert GV, Henesian MA, Hermann MR, Jancaitis KS, Knittel K, Kohut T, Lindl JD, Manes KR, Marshall CD, Mehta NC, Menapace J, Moses E, Murray JR, Nostrand MC, Orth CD, Patterson R, Sacks RA, Saunders R, Shaw MJ, Spaeth M, Sutton SB, Williams WH, Widmayer CC, White RK, Whitman PK, Yang ST, and Van Wonterghem BM

Abstract

A single beamline of the National Ignition Facility (NIF) has been operated at a wavelength of 526.5 nm (2 omega) by frequency converting the fundamental 1053 nm (1 omega) wavelength with an 18.2 mm thick type-I potassium dihydrogen phosphate (KDP) second-harmonic generator (SHG) crystal. Second-harmonic energies of up to 17.9 kJ were measured at the final optics focal plane with a conversion efficiency of 82%. For a similarly configured 192-beam NIF, this scales to a total 2 omega energy of 3.4 MJ full NIF equivalent (FNE).

Published
2008
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49. Radiation-driven hydrodynamics of high- hohlraums on the national ignition facility.

Author

Dewald EL, Suter LJ, Landen OL, Holder JP, Schein J, Lee FD, Campbell KM, Weber FA, Pellinen DG, Schneider MB, Celeste JR, McDonald JW, Foster JM, Niemann C, Mackinnon AJ, Glenzer SH, Young BK, Haynam CA, Shaw MJ, Turner RE, Froula D, Kauffman RL, Thomas BR, Atherton LJ, Bonanno RE, Dixit SN, Eder DC, Holtmeier G, Kalantar DH, Koniges AE, Macgowan BJ, Manes KR, Munro DH, Murray JR, Parham TG, Piston K, Van Wonterghem BM, Wallace RJ, Wegner PJ, Whitman PK, Hammel BA, and Moses EI

Abstract

The first hohlraum experiments on the National Ignition Facility (NIF) using the initial four laser beams tested radiation temperature limits imposed by plasma filling. For a variety of hohlraum sizes and pulse lengths, the measured x-ray flux shows signatures of filling that coincide with hard x-ray emission from plasma streaming out of the hohlraum. These observations agree with hydrodynamic simulations and with an analytical model that includes hydrodynamic and coronal radiative losses. The modeling predicts radiation temperature limits with full NIF (1.8 MJ), greater, and of longer duration than required for ignition hohlraums.

Published
2005
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50. Spatial filter pinhole for high-energy pulsed lasers.

Author

Celliers PM, Estabrook KG, Wallace RJ, Murray JE, Da Silva LB, Macgowan BJ, Van Wonterghem BM, and Manes KR

Abstract

Spatial filters are essential components for maintaining high beam quality in high-energy pulsed laser systems. The long-duration (21 ns) high-energy pulses envisioned for future inertial-confinement fusion drive systems, such as the U.S. National Ignition Facility (NIF), are likely to lead to increased plasma generation and closure effects within the pinholes in the spatial filters. The design goal for the pinhole spatial filter for the NIF design is to remove small-angle scatter in the beam to as little as a ?100-murad divergence. It is uncertain whether this design requirement can be met with a conventional pinhole design. We propose a new pinhole architecture that addresses these issues by incorporating features intended to reduce the rate of plasma generation. Initial experiments with this design have verified its performance improvement relative to a conventional pinhole design.

Published
1998
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