Simulation of short pulse photoemission in a micro-diode with implications for optimal beam brightness
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| _version_ | 1866914630367969280 |
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| author | Árnason, Hákon Örn Torfason, Kristinn Manolescu, Andrei Valfells, Ágúst |
| author_facet | Árnason, Hákon Örn Torfason, Kristinn Manolescu, Andrei Valfells, Ágúst |
| contents | Molecular dynamics simulations, with full Coulomb interaction are used to model short-pulse photoemission from a finite area in a microdiode. We demonstrate three emission regimes, source-limited emission, space-charge limited emission for short-pulses, and space-charge limited emission for the steady state. We show that beam brightness is at a maximum during transition from the source-limited emission regime to the space-charge limited emission regime for short pulses. From our simulations it is apparent that the important factor is the emitter spot size when estimating the critical charge density for short-pulse electron emission. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2301_06123 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Simulation of short pulse photoemission in a micro-diode with implications for optimal beam brightness Árnason, Hákon Örn Torfason, Kristinn Manolescu, Andrei Valfells, Ágúst Plasma Physics Accelerator Physics Molecular dynamics simulations, with full Coulomb interaction are used to model short-pulse photoemission from a finite area in a microdiode. We demonstrate three emission regimes, source-limited emission, space-charge limited emission for short-pulses, and space-charge limited emission for the steady state. We show that beam brightness is at a maximum during transition from the source-limited emission regime to the space-charge limited emission regime for short pulses. From our simulations it is apparent that the important factor is the emitter spot size when estimating the critical charge density for short-pulse electron emission. |
| title | Simulation of short pulse photoemission in a micro-diode with implications for optimal beam brightness |
| topic | Plasma Physics Accelerator Physics |
| url | https://arxiv.org/abs/2301.06123 |