Density measurement in a laser-plasma-accelerator capillary using Raman scattering
Laser wakefield accelerators have shown 1 GeV electron beams with some 10 pC charge from centimeter-length gas capillaries. The electrons are accelerated by the field of a plasma wave trailing an intense laser pulse. For improving the stability, electron injection and acceleration should be separate...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2011-05-01
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| Series: | Physical Review Special Topics. Accelerators and Beams |
| Online Access: | http://doi.org/10.1103/PhysRevSTAB.14.050705 |
| _version_ | 1811298289896652800 |
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| author | T. Weineisen B. Göppner K. Schmid M. Fuchs H. Schröder S. Karsch F. Grüner |
| author_facet | T. Weineisen B. Göppner K. Schmid M. Fuchs H. Schröder S. Karsch F. Grüner |
| author_sort | T. Weineisen |
| collection | DOAJ |
| description | Laser wakefield accelerators have shown 1 GeV electron beams with some 10 pC charge from centimeter-length gas capillaries. The electrons are accelerated by the field of a plasma wave trailing an intense laser pulse. For improving the stability, electron injection and acceleration should be separated. One possible scheme is self-injection with a plasma density gradient and subsequent acceleration at constant density. This can be realized by embedding a high-density gas jet into a capillary. A critical parameter for this scheme to work is the realization of a specific density gradient, therefore a robust measurement is desirable. A new method utilizing the density dependence of Raman scattering has been used to characterize the high-density region of a neutral gas within a capillary with a few ten micrometer longitudinal resolution. This allowed us to measure a density drop of a factor of 4 within 200 micrometers. |
| first_indexed | 2024-04-13T06:17:19Z |
| format | Article |
| id | doaj.art-8199b65db22843df9da2fbf3ca524b79 |
| institution | Directory Open Access Journal |
| issn | 1098-4402 |
| language | English |
| last_indexed | 2024-04-13T06:17:19Z |
| publishDate | 2011-05-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Special Topics. Accelerators and Beams |
| spelling | doaj.art-8199b65db22843df9da2fbf3ca524b792022-12-22T02:58:47ZengAmerican Physical SocietyPhysical Review Special Topics. Accelerators and Beams1098-44022011-05-0114505070510.1103/PhysRevSTAB.14.050705Density measurement in a laser-plasma-accelerator capillary using Raman scatteringT. WeineisenB. GöppnerK. SchmidM. FuchsH. SchröderS. KarschF. GrünerLaser wakefield accelerators have shown 1 GeV electron beams with some 10 pC charge from centimeter-length gas capillaries. The electrons are accelerated by the field of a plasma wave trailing an intense laser pulse. For improving the stability, electron injection and acceleration should be separated. One possible scheme is self-injection with a plasma density gradient and subsequent acceleration at constant density. This can be realized by embedding a high-density gas jet into a capillary. A critical parameter for this scheme to work is the realization of a specific density gradient, therefore a robust measurement is desirable. A new method utilizing the density dependence of Raman scattering has been used to characterize the high-density region of a neutral gas within a capillary with a few ten micrometer longitudinal resolution. This allowed us to measure a density drop of a factor of 4 within 200 micrometers.http://doi.org/10.1103/PhysRevSTAB.14.050705 |
| spellingShingle | T. Weineisen B. Göppner K. Schmid M. Fuchs H. Schröder S. Karsch F. Grüner Density measurement in a laser-plasma-accelerator capillary using Raman scattering Physical Review Special Topics. Accelerators and Beams |
| title | Density measurement in a laser-plasma-accelerator capillary using Raman scattering |
| title_full | Density measurement in a laser-plasma-accelerator capillary using Raman scattering |
| title_fullStr | Density measurement in a laser-plasma-accelerator capillary using Raman scattering |
| title_full_unstemmed | Density measurement in a laser-plasma-accelerator capillary using Raman scattering |
| title_short | Density measurement in a laser-plasma-accelerator capillary using Raman scattering |
| title_sort | density measurement in a laser plasma accelerator capillary using raman scattering |
| url | http://doi.org/10.1103/PhysRevSTAB.14.050705 |
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