Characterisation techniques for temporally structured pulses in high-repetition-rate laser-plasma wakefield accelerators
Multi-pulse laser-plasma wakefield accelerators (MP-LWFA) provide an alternative way towards compact and multi-kilohertz operation of GeV-scale laser-electron accelerators for advanced light sources and future particle accelerators. However, an appropriate pulse characterisation technique has not be...
| المؤلف الرئيسي: | |
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| مؤلفون آخرون: | |
| التنسيق: | أطروحة |
| اللغة: | English |
| منشور في: |
2024
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| الموضوعات: |
| _version_ | 1826313914874331136 |
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| author | Wang, W |
| author2 | Hooker, S |
| author_facet | Hooker, S Wang, W |
| author_sort | Wang, W |
| collection | OXFORD |
| description | Multi-pulse laser-plasma wakefield accelerators (MP-LWFA) provide an alternative way towards compact and multi-kilohertz operation of GeV-scale laser-electron accelerators for advanced light sources and future particle accelerators. However, an appropriate pulse characterisation technique has not been developed for examining and optimising temporal structures of multi-pulse trains in MP-LWFA. The aim of this research is to understand whether the spectral and temporal structures of ps-long pulse trains with fine structures on the fs-scale can be characterised with a frequency-resolved optical gating (FROG) technique. A FROG device with a single-shot beam geometry was developed to measure various pulse train structures generated by the temporal interference of two chirped pulses. It was experimentally demonstrated that the single-shot FROG device, using the extended ptychographic iterative engine phase retrieval algorithm, could retrieve pulse trains with 11 pulses, a time-bandwidth-product of (16 ± 1), average pulse spacing of (232 ± 7) fs, and local pulse spacing increment of (27 ± 7) fs. The results indicate that the single-shot FROG technique could characterise pulse trains with various temporal structures. Therefore, this framework, accompanied by cross-referenced spectral interferometry, can be employed for the complete pulse characterisation of pulse trains in a novel electron acceleration scheme known as plasma-modulated plasma accelerators. |
| first_indexed | 2024-09-25T04:22:26Z |
| format | Thesis |
| id | oxford-uuid:a2e4d4c7-e639-4ee5-90bd-9622a8b190d5 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-09-25T04:22:26Z |
| publishDate | 2024 |
| record_format | dspace |
| spelling | oxford-uuid:a2e4d4c7-e639-4ee5-90bd-9622a8b190d52024-08-19T11:26:17ZCharacterisation techniques for temporally structured pulses in high-repetition-rate laser-plasma wakefield acceleratorsThesishttp://purl.org/coar/resource_type/c_db06uuid:a2e4d4c7-e639-4ee5-90bd-9622a8b190d5Laser-plasma interactionsUltrafast opticsPicosecond pulsesLasers in plasma researchPulse MeasurementEnglishHyrax Deposit2024Wang, WHooker, SWalczak, RMulti-pulse laser-plasma wakefield accelerators (MP-LWFA) provide an alternative way towards compact and multi-kilohertz operation of GeV-scale laser-electron accelerators for advanced light sources and future particle accelerators. However, an appropriate pulse characterisation technique has not been developed for examining and optimising temporal structures of multi-pulse trains in MP-LWFA. The aim of this research is to understand whether the spectral and temporal structures of ps-long pulse trains with fine structures on the fs-scale can be characterised with a frequency-resolved optical gating (FROG) technique. A FROG device with a single-shot beam geometry was developed to measure various pulse train structures generated by the temporal interference of two chirped pulses. It was experimentally demonstrated that the single-shot FROG device, using the extended ptychographic iterative engine phase retrieval algorithm, could retrieve pulse trains with 11 pulses, a time-bandwidth-product of (16 ± 1), average pulse spacing of (232 ± 7) fs, and local pulse spacing increment of (27 ± 7) fs. The results indicate that the single-shot FROG technique could characterise pulse trains with various temporal structures. Therefore, this framework, accompanied by cross-referenced spectral interferometry, can be employed for the complete pulse characterisation of pulse trains in a novel electron acceleration scheme known as plasma-modulated plasma accelerators. |
| spellingShingle | Laser-plasma interactions Ultrafast optics Picosecond pulses Lasers in plasma research Pulse Measurement Wang, W Characterisation techniques for temporally structured pulses in high-repetition-rate laser-plasma wakefield accelerators |
| title | Characterisation techniques for temporally structured pulses in high-repetition-rate laser-plasma wakefield accelerators |
| title_full | Characterisation techniques for temporally structured pulses in high-repetition-rate laser-plasma wakefield accelerators |
| title_fullStr | Characterisation techniques for temporally structured pulses in high-repetition-rate laser-plasma wakefield accelerators |
| title_full_unstemmed | Characterisation techniques for temporally structured pulses in high-repetition-rate laser-plasma wakefield accelerators |
| title_short | Characterisation techniques for temporally structured pulses in high-repetition-rate laser-plasma wakefield accelerators |
| title_sort | characterisation techniques for temporally structured pulses in high repetition rate laser plasma wakefield accelerators |
| topic | Laser-plasma interactions Ultrafast optics Picosecond pulses Lasers in plasma research Pulse Measurement |
| work_keys_str_mv | AT wangw characterisationtechniquesfortemporallystructuredpulsesinhighrepetitionratelaserplasmawakefieldaccelerators |