Relativistic self focusing and frequency shift of super-Gaussian laser beam in plasma
Relativistic self focusing and frequency shift of laser beam having super-Gaussian profile in space and Gaussian profile in time is studied in a plasma. The relativistic mass nonlinearity is found to cause time dependent self focusing of the laser pulse and the saturation effect of nonlinearity avoi...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Elsevier
2020-06-01
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| Series: | Results in Physics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379720303703 |
| _version_ | 1818161942819241984 |
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| author | Hitendra K. Malik Lalita Devi |
| author_facet | Hitendra K. Malik Lalita Devi |
| author_sort | Hitendra K. Malik |
| collection | DOAJ |
| description | Relativistic self focusing and frequency shift of laser beam having super-Gaussian profile in space and Gaussian profile in time is studied in a plasma. The relativistic mass nonlinearity is found to cause time dependent self focusing of the laser pulse and the saturation effect of nonlinearity avoids point focusing of the beam. For ultrashort laser pulse, the front of the pulse undergoes frequency down shift while that of the tail undergoes up shift. Frequency shift increases and self focusing becomes stronger for higher intensity of the laser. The self focusing is also stronger for the laser beam carrying larger wavelength. |
| first_indexed | 2024-12-11T16:25:47Z |
| format | Article |
| id | doaj.art-ad5a49fc55b54d05afc370a6d8083216 |
| institution | Directory Open Access Journal |
| issn | 2211-3797 |
| language | English |
| last_indexed | 2024-12-11T16:25:47Z |
| publishDate | 2020-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj.art-ad5a49fc55b54d05afc370a6d80832162022-12-22T00:58:45ZengElsevierResults in Physics2211-37972020-06-0117103070Relativistic self focusing and frequency shift of super-Gaussian laser beam in plasmaHitendra K. Malik0Lalita Devi1Plasma Waves and Particle Acceleration Laboratory, Department of Physics, Indian Institute of Technology Delhi, New Delhi 110 016, IndiaCorresponding author.; Plasma Waves and Particle Acceleration Laboratory, Department of Physics, Indian Institute of Technology Delhi, New Delhi 110 016, IndiaRelativistic self focusing and frequency shift of laser beam having super-Gaussian profile in space and Gaussian profile in time is studied in a plasma. The relativistic mass nonlinearity is found to cause time dependent self focusing of the laser pulse and the saturation effect of nonlinearity avoids point focusing of the beam. For ultrashort laser pulse, the front of the pulse undergoes frequency down shift while that of the tail undergoes up shift. Frequency shift increases and self focusing becomes stronger for higher intensity of the laser. The self focusing is also stronger for the laser beam carrying larger wavelength.http://www.sciencedirect.com/science/article/pii/S2211379720303703Self focusingRelativistic nonlinearityFrequency shiftSuper-Gaussian laserMoment theoryBeam width parameter |
| spellingShingle | Hitendra K. Malik Lalita Devi Relativistic self focusing and frequency shift of super-Gaussian laser beam in plasma Results in Physics Self focusing Relativistic nonlinearity Frequency shift Super-Gaussian laser Moment theory Beam width parameter |
| title | Relativistic self focusing and frequency shift of super-Gaussian laser beam in plasma |
| title_full | Relativistic self focusing and frequency shift of super-Gaussian laser beam in plasma |
| title_fullStr | Relativistic self focusing and frequency shift of super-Gaussian laser beam in plasma |
| title_full_unstemmed | Relativistic self focusing and frequency shift of super-Gaussian laser beam in plasma |
| title_short | Relativistic self focusing and frequency shift of super-Gaussian laser beam in plasma |
| title_sort | relativistic self focusing and frequency shift of super gaussian laser beam in plasma |
| topic | Self focusing Relativistic nonlinearity Frequency shift Super-Gaussian laser Moment theory Beam width parameter |
| url | http://www.sciencedirect.com/science/article/pii/S2211379720303703 |
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