Plasma conditions for improved energy coupling into the gain region of the Ni-like Pd transient collisional x-ray laser
We have directly probed the conditions in which the Ni-like Pd transient collisional x-ray laser is generated and propagates by measuring the near-field image and by utilizing picosecond resolution soft x-ray laser interferometry of the preformed Pd plasma gain medium. The electron density and gain...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_15393755_v72_n3_p_Smith |
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todo:paper_15393755_v72_n3_p_Smith2023-10-03T16:22:08Z Plasma conditions for improved energy coupling into the gain region of the Ni-like Pd transient collisional x-ray laser Smith, R.F. Dunn, J. Filevich, J. Moon, S. Nilsen, J. Keenan, R. Shlyaptsev, V.N. Rocca, J.J. Hunter, J.R. Marconi, M.C. Energy coupling Plasma conditions X-ray laser interferometry Carrier concentration Nickel Optical resolving power Palladium X ray lasers Plasma collision processes We have directly probed the conditions in which the Ni-like Pd transient collisional x-ray laser is generated and propagates by measuring the near-field image and by utilizing picosecond resolution soft x-ray laser interferometry of the preformed Pd plasma gain medium. The electron density and gain region of the plasma have been determined experimentally and are found to be in good agreement with simulations. We observe a strong dependence of the laser pump-gain medium coupling on the laser pump parameters. The most efficient coupling occurs with the formation of lower density gradients in the preformed plasma and when the duration of the main heating pulse is comparable to the gain lifetime (∼10ps for mid-Z Ni-like schemes). This increases the output intensity by more than an order of magnitude relative to the commonly utilized case where the same pumping energy is delivered within a shorter heating pulse duration (<3ps). In contrast, the higher intensity heating pulses are observed to be absorbed at higher electron densities and in regions where steep density gradients limit the effective length of the gain medium. © 2005 The American Physical Society. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_15393755_v72_n3_p_Smith |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Energy coupling Plasma conditions X-ray laser interferometry Carrier concentration Nickel Optical resolving power Palladium X ray lasers Plasma collision processes |
| spellingShingle |
Energy coupling Plasma conditions X-ray laser interferometry Carrier concentration Nickel Optical resolving power Palladium X ray lasers Plasma collision processes Smith, R.F. Dunn, J. Filevich, J. Moon, S. Nilsen, J. Keenan, R. Shlyaptsev, V.N. Rocca, J.J. Hunter, J.R. Marconi, M.C. Plasma conditions for improved energy coupling into the gain region of the Ni-like Pd transient collisional x-ray laser |
| topic_facet |
Energy coupling Plasma conditions X-ray laser interferometry Carrier concentration Nickel Optical resolving power Palladium X ray lasers Plasma collision processes |
| description |
We have directly probed the conditions in which the Ni-like Pd transient collisional x-ray laser is generated and propagates by measuring the near-field image and by utilizing picosecond resolution soft x-ray laser interferometry of the preformed Pd plasma gain medium. The electron density and gain region of the plasma have been determined experimentally and are found to be in good agreement with simulations. We observe a strong dependence of the laser pump-gain medium coupling on the laser pump parameters. The most efficient coupling occurs with the formation of lower density gradients in the preformed plasma and when the duration of the main heating pulse is comparable to the gain lifetime (∼10ps for mid-Z Ni-like schemes). This increases the output intensity by more than an order of magnitude relative to the commonly utilized case where the same pumping energy is delivered within a shorter heating pulse duration (<3ps). In contrast, the higher intensity heating pulses are observed to be absorbed at higher electron densities and in regions where steep density gradients limit the effective length of the gain medium. © 2005 The American Physical Society. |
| format |
JOUR |
| author |
Smith, R.F. Dunn, J. Filevich, J. Moon, S. Nilsen, J. Keenan, R. Shlyaptsev, V.N. Rocca, J.J. Hunter, J.R. Marconi, M.C. |
| author_facet |
Smith, R.F. Dunn, J. Filevich, J. Moon, S. Nilsen, J. Keenan, R. Shlyaptsev, V.N. Rocca, J.J. Hunter, J.R. Marconi, M.C. |
| author_sort |
Smith, R.F. |
| title |
Plasma conditions for improved energy coupling into the gain region of the Ni-like Pd transient collisional x-ray laser |
| title_short |
Plasma conditions for improved energy coupling into the gain region of the Ni-like Pd transient collisional x-ray laser |
| title_full |
Plasma conditions for improved energy coupling into the gain region of the Ni-like Pd transient collisional x-ray laser |
| title_fullStr |
Plasma conditions for improved energy coupling into the gain region of the Ni-like Pd transient collisional x-ray laser |
| title_full_unstemmed |
Plasma conditions for improved energy coupling into the gain region of the Ni-like Pd transient collisional x-ray laser |
| title_sort |
plasma conditions for improved energy coupling into the gain region of the ni-like pd transient collisional x-ray laser |
| url |
http://hdl.handle.net/20.500.12110/paper_15393755_v72_n3_p_Smith |
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