Non-invasive low charge electron beam time-of-arrival diagnostic using a plasmonics-enhanced photoconductive antenna
| Autor: | Bryce Jacobson, E. C. Snively, Nezih T. Yardimci, Mona Jarrahi, Alex Murokh, Pietro Musumeci |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) 010308 nuclear & particles physics business.industry Near-infrared spectroscopy Physics::Optics 01 natural sciences Signal Time of arrival Optics Picosecond Electric field 0103 physical sciences Cathode ray Physics::Accelerator Physics 010306 general physics business Beam (structure) Plasmon |
| Zdroj: | Applied Physics Letters. 113:193501 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/1.5052631 |
| Popis: | The use of a plasmonics-enhanced photoconductive antenna (PCA) optically gated by a near infrared (NIR) pulse enables non-invasive time-of-arrival measurements of a low charge electron beam with respect to the NIR reference, achieving picosecond resolution. The measured signal values show the expected scaling with the beam charge and distance from PCA to the beam axis, as the PCA samples the electric field of the passing electron beam. We operate the device with an NIR spot size much larger than the PCA active-area, resulting in a very simple optical setup and alignment procedure, making the plasmonics-enhanced PCA a preferred alternative to more complex timing diagnostics for applications requiring non-invasive picosecond or sub-picosecond timestamping. |
| Databáze: | OpenAIRE |
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