Short-Pulse Driven Radiofrequency X-Band Photoinjector: Electromagnetic Properties and Beam Dynamics in the Transient Regime
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2025
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866909536093208576 |
|---|---|
| author | Chen, Gongxiaohui Piot, Philippe Power, John Jing, Chunguang |
| author_facet | Chen, Gongxiaohui Piot, Philippe Power, John Jing, Chunguang |
| contents | This paper presents a study of the radiofrequency (RF) characteristics and beam dynamics of an X-band photogun (Xgun) operating in the transient state. The photoinjector is designed to operate with short RF pulses (9 ns) to achieve high accelerating gradients. Short-pulse operation potentially reduces breakdown risks, as experimentally demonstrated by achieving a gradient exceeding 350 MV/m. However, the short pulse duration causes the cavity to operate in a transient regime where the electromagnetic field deviates from the conventional steady-state condition. To investigate the effects of deviations from steady-state operation, the time-dependent spatial evolution of the cavity fields was examined using both 9-ns and 50-ns RF pulses. The 50-ns pulse served as a reference to characterize the cavity behavior under a fully filled steady-state condition. Beam dynamics simulations were conducted to explore the impact of transient RF effects on beam kinetic energy, transverse emittance, and bunch length; these simulations employed a new dynamic field mapping approach to model transient RF fields. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_09575 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Short-Pulse Driven Radiofrequency X-Band Photoinjector: Electromagnetic Properties and Beam Dynamics in the Transient Regime Chen, Gongxiaohui Piot, Philippe Power, John Jing, Chunguang Accelerator Physics This paper presents a study of the radiofrequency (RF) characteristics and beam dynamics of an X-band photogun (Xgun) operating in the transient state. The photoinjector is designed to operate with short RF pulses (9 ns) to achieve high accelerating gradients. Short-pulse operation potentially reduces breakdown risks, as experimentally demonstrated by achieving a gradient exceeding 350 MV/m. However, the short pulse duration causes the cavity to operate in a transient regime where the electromagnetic field deviates from the conventional steady-state condition. To investigate the effects of deviations from steady-state operation, the time-dependent spatial evolution of the cavity fields was examined using both 9-ns and 50-ns RF pulses. The 50-ns pulse served as a reference to characterize the cavity behavior under a fully filled steady-state condition. Beam dynamics simulations were conducted to explore the impact of transient RF effects on beam kinetic energy, transverse emittance, and bunch length; these simulations employed a new dynamic field mapping approach to model transient RF fields. |
| title | Short-Pulse Driven Radiofrequency X-Band Photoinjector: Electromagnetic Properties and Beam Dynamics in the Transient Regime |
| topic | Accelerator Physics |
| url | https://arxiv.org/abs/2503.09575 |