Zobrazeno 1 - 10
of 839
pro vyhledávání: '"Dyer G"'
We outline an approach for improving the temporal contrast of a high-intensity laser system by $>$8 orders of magnitude using non-collinear sum-frequency generation with the signal and idler of an optical parametric amplifier. We demonstrate the effe
Externí odkaz:
http://arxiv.org/abs/1905.01584
Autor:
Peebles, J., Arefiev, A. V., Zhang, S., McGuffey, C., Spinks, M., Gordon, J., Gaul, E. W., Dyer, G., Martinez, M., Donovan, M. E., Ditmire, T., Park, J., Chen, H., McLean, H. S., Wei, M. S., Krasheninnikov, S. I., Beg, F. N.
Publikováno v:
Phys. Rev. E 98, 053202 (2018)
The physics governing electron acceleration by a relativistically intense laser are not confined to the critical density surface, they also pervade the sub-critical plasma in front of the target. Here, particles can gain many times the ponderomotive
Externí odkaz:
http://arxiv.org/abs/1810.02398
Autor:
Shaw, J. M., Bernstein, A. C., Zgadzaj, R., Hannasch, A., LaBerge, M., Chang, Y. Y., Weichman, K., Welch, J., Henderson, W., Tsai, H. -E., Fazel, N., Wang, X., Ditmire, T., Donovan, M., Dyer, G., Gaul, E., Gordon, J., Martinez, M., Spinks, M., Toncian, T., Wagner, C., Downer, M. C.
We convert a GeV laser-plasma electron accelerator into a compact femtosecond-pulsed $\gamma$-ray source by inserting a $100 \mu$m-thick glass plate $\sim3$ cm after the accelerator exit. With near-unity reliability, and requiring only crude alignmen
Externí odkaz:
http://arxiv.org/abs/1705.08637
Publikováno v:
Appl. Phys. Lett. 108, 013106 (2016)
Direct current (DC) transport and far infrared photoresponse were studied an InAs/GaSb double quantum well with an inverted band structure. The DC transport depends systematically upon the DC bias configuration and operating temperature. Surprisingly
Externí odkaz:
http://arxiv.org/abs/1605.02789
Autor:
Lattuada, D., Barbarino, M., Bonasera, A., Bang, W., Quevedo, H. J., Warren, M., Consoli, F., De Angelis, R., Andreoli, P., Kimura, S., Dyer, G., Bernstein, A. C., Hagel, K., Barbui, M., Schmidt, K., Gaul, E., Donovan, M. E., Natowitz, J. B., Ditmire, T.
Publikováno v:
Phys. Rev. C 93, 045808 (2016)
In this work, we present a new and general method for measuring the astrophysical S-factor of nuclear reactions in laser-induced plasmas and we apply it to d(d,n)$^{3}$He. The experiment was performed with the Texas Petawatt laser, which delivered 15
Externí odkaz:
http://arxiv.org/abs/1601.02412
Autor:
Toncian, T., Wang, C., McCary, E., Meadows, A., Arefiev, A. V., Blakeney, J., Serratto, K., Kuk, D., Chester, C., Roycroft, R., Gao, L., Fu, H., Yan, X. Q., Schreiber, J., Pomerantz, I., Bernstein, A., Quevedo, H., Dyer, G., Ditmire, T., Hegelich, B. M.
The irradiation of few nm thick targets by a finite-contrast high-intensity short-pulse laser results in a strong pre-expansion of these targets at the arrival time of the main pulse. The targets decompress to near and lower than critical densities p
Externí odkaz:
http://arxiv.org/abs/1511.04495
Thermal and chaotic distributions of plasma in laser driven Coulomb explosions of deuterium clusters
Autor:
Barbarino, M., Warrens, M., Bonasera, A., Lattuada, D., Bang, W., Quevedo, H. J., Consoli, F., De Angelis, R., Andreoli, P., Kimura, S., Dyer, G., Bernstein, A. C., Hagel, K., Barbui, M., Schmidt, K., Gaul, E., Donovan, M. E., Natowitz, J. B., Ditmire, T.
In this work we explore the possibility that the motion of the deuterium ions emitted from Coulomb cluster explosions is chaotic enough to resemble thermalization. We analyze the process of nuclear fusion reactions driven by laser-cluster interaction
Externí odkaz:
http://arxiv.org/abs/1510.05971
Autor:
Bang, W., Barbui, M., Bonasera, A., Quevedo, H. J., Dyer, G., Bernstein, A. C., Hagel, K., Schmidt, K., Gaul, E., Donovan, M. E., Consoli, F., De Angelis, R., Andreoli, P., Barbarino, M., Kimura, S., Mazzocco, M., Natowitz, J. B., Ditmire, T.
Publikováno v:
Physical Review E 88 (2013) 033108
We report on experiments in which the Texas Petawatt laser irradiated a mixture of deuterium or deuterated methane clusters and helium-3 gas, generating three types of nuclear fusion reactions: D(d, 3He)n, D(d, t)p and 3He(d, p)4He. We measured the y
Externí odkaz:
http://arxiv.org/abs/1308.3798
Autor:
Barbui, M., Bang, W., Bonasera, A., Hagel, K., Schmidt, K., Natowitz, J. B., Burch, R., Giuliani, G., Barbarino, M., Zheng, H., Dyer, G., Quevedo, H. J., Gaul, E., Bernstein, A. C., Donovan, M., Kimura, S., Mazzocco, M., Consoli, F., De Angelis, R., Andreoli, P., Ditmire, T.
The plasma astrophysical S factor for the 3He(D, p)4He fusion reaction was measured for the first time at temperatures of few keV, using the interaction of intense ultrafast laser pulses with molecular deuterium clusters mixed with 3He atoms. Differe
Externí odkaz:
http://arxiv.org/abs/1307.0432
Autor:
Bang, W., Dyer, G., Quevedo, H. J., Bernstein, A. C., Gaul, E., Rougk, J., Aymond, F., Donovan, M. E., Ditmire, T.
Publikováno v:
Physics of Plasmas 20 (2013) 093104
We measured, using Petawatt-level pulses, the average ion energy and neutron yield in high-intensity laser interactions with molecular clusters as a function of laser intensity. The interaction volume over which fusion occurred (1-10 mm^3) was larger
Externí odkaz:
http://arxiv.org/abs/1303.5814