The effects on ion beam optics of a spherical aberration at the plasma boundary
| ISSN: |
1089-7623
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|---|---|
| Source: |
AIP Digital Archive
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| Topics: |
Physics
Electrical Engineering, Measurement and Control Technology
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| Notes: |
Experimental data show that the minimum divergence of a positive helium ion beam does not occur at the beam perveance predicted by linear ion optics. A model is presented that introduces a third-order term into the ion optics equations, in the manner of a spherical aberration to the plasma boundary. Values of the aberration coefficient C are calculated from the data and it is shown that C∝(a/d)−1.9, where a/d is the aspect ratio of the accelerator. The contour of the plasma boundary is plotted and it is shown that the aberration leads to a flattening of the boundary at the extremes of the extraction aperture.
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| Type of Medium: |
Electronic Resource
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| URL: |
| _version_ | 1798289705891004417 |
|---|---|
| autor | Surrey, E. Holmes, A. J. T. |
| autorsonst | Surrey, E. Holmes, A. J. T. |
| book_url | http://dx.doi.org/10.1063/1.1141385 |
| datenlieferant | nat_lic_papers |
| hauptsatz | hsatz_simple |
| identnr | NLZ219497435 |
| issn | 1089-7623 |
| journal_name | Review of Scientific Instruments |
| materialart | 1 |
| notes | Experimental data show that the minimum divergence of a positive helium ion beam does not occur at the beam perveance predicted by linear ion optics. A model is presented that introduces a third-order term into the ion optics equations, in the manner of a spherical aberration to the plasma boundary. Values of the aberration coefficient C are calculated from the data and it is shown that C∝(a/d)−1.9, where a/d is the aspect ratio of the accelerator. The contour of the plasma boundary is plotted and it is shown that the aberration leads to a flattening of the boundary at the extremes of the extraction aperture. |
| package_name | American Institute of Physics (AIP) |
| publikationsjahr_anzeige | 1990 |
| publikationsjahr_facette | 1990 |
| publikationsjahr_intervall | 8009:1990-1994 |
| publikationsjahr_sort | 1990 |
| publikationsort | [S.l.] |
| publisher | American Institute of Physics (AIP) |
| reference | 61 (1990), S. 2171-2175 |
| search_space | articles |
| shingle_author_1 | Surrey, E. Holmes, A. J. T. |
| shingle_author_2 | Surrey, E. Holmes, A. J. T. |
| shingle_author_3 | Surrey, E. Holmes, A. J. T. |
| shingle_author_4 | Surrey, E. Holmes, A. J. T. |
| shingle_catch_all_1 | Surrey, E. Holmes, A. J. T. The effects on ion beam optics of a spherical aberration at the plasma boundary Experimental data show that the minimum divergence of a positive helium ion beam does not occur at the beam perveance predicted by linear ion optics. A model is presented that introduces a third-order term into the ion optics equations, in the manner of a spherical aberration to the plasma boundary. Values of the aberration coefficient C are calculated from the data and it is shown that C∝(a/d)−1.9, where a/d is the aspect ratio of the accelerator. The contour of the plasma boundary is plotted and it is shown that the aberration leads to a flattening of the boundary at the extremes of the extraction aperture. 1089-7623 10897623 American Institute of Physics (AIP) |
| shingle_catch_all_2 | Surrey, E. Holmes, A. J. T. The effects on ion beam optics of a spherical aberration at the plasma boundary Experimental data show that the minimum divergence of a positive helium ion beam does not occur at the beam perveance predicted by linear ion optics. A model is presented that introduces a third-order term into the ion optics equations, in the manner of a spherical aberration to the plasma boundary. Values of the aberration coefficient C are calculated from the data and it is shown that C∝(a/d)−1.9, where a/d is the aspect ratio of the accelerator. The contour of the plasma boundary is plotted and it is shown that the aberration leads to a flattening of the boundary at the extremes of the extraction aperture. 1089-7623 10897623 American Institute of Physics (AIP) |
| shingle_catch_all_3 | Surrey, E. Holmes, A. J. T. The effects on ion beam optics of a spherical aberration at the plasma boundary Experimental data show that the minimum divergence of a positive helium ion beam does not occur at the beam perveance predicted by linear ion optics. A model is presented that introduces a third-order term into the ion optics equations, in the manner of a spherical aberration to the plasma boundary. Values of the aberration coefficient C are calculated from the data and it is shown that C∝(a/d)−1.9, where a/d is the aspect ratio of the accelerator. The contour of the plasma boundary is plotted and it is shown that the aberration leads to a flattening of the boundary at the extremes of the extraction aperture. 1089-7623 10897623 American Institute of Physics (AIP) |
| shingle_catch_all_4 | Surrey, E. Holmes, A. J. T. The effects on ion beam optics of a spherical aberration at the plasma boundary Experimental data show that the minimum divergence of a positive helium ion beam does not occur at the beam perveance predicted by linear ion optics. A model is presented that introduces a third-order term into the ion optics equations, in the manner of a spherical aberration to the plasma boundary. Values of the aberration coefficient C are calculated from the data and it is shown that C∝(a/d)−1.9, where a/d is the aspect ratio of the accelerator. The contour of the plasma boundary is plotted and it is shown that the aberration leads to a flattening of the boundary at the extremes of the extraction aperture. 1089-7623 10897623 American Institute of Physics (AIP) |
| shingle_title_1 | The effects on ion beam optics of a spherical aberration at the plasma boundary |
| shingle_title_2 | The effects on ion beam optics of a spherical aberration at the plasma boundary |
| shingle_title_3 | The effects on ion beam optics of a spherical aberration at the plasma boundary |
| shingle_title_4 | The effects on ion beam optics of a spherical aberration at the plasma boundary |
| sigel_instance_filter | dkfz geomar wilbert ipn albert |
| source_archive | AIP Digital Archive |
| timestamp | 2024-05-06T08:05:03.631Z |
| titel | The effects on ion beam optics of a spherical aberration at the plasma boundary |
| titel_suche | The effects on ion beam optics of a spherical aberration at the plasma boundary |
| topic | U ZN |
| uid | nat_lic_papers_NLZ219497435 |