期刊
JOURNAL OF INSTRUMENTATION
卷 7, 期 -, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1748-0221/7/01/P01009
关键词
Beam-line instrumentation (beam position and profile monitors; beam-intensity monitors; bunch length monitors); Accelerator Subsystems and Technologies
资金
- FACET team
- STFC [ST/H001026/1, ST/J002011/1, ST/G008531/1, John Adams Institute, ST/K001582/1, ST/H001026/2] Funding Source: UKRI
- Science and Technology Facilities Council [ST/K001582/1, ST/J002011/1, ST/H001026/2, ST/H001026/1, ST/G008531/1, John Adams Institute, ST/J002011/1 John Adams Inst] Funding Source: researchfish
Advanced accelerators for fourth generation light sources based on high brightness linacs or laser-driven wakefield accelerators will operate with intense, highly relativistic electron bunches that are only a few fs long. Diagnostic techniques for the determination of temporal profile of such bunches are required to be non invasive, single shot, economic and with the required resolution in the fs regime. The use of a radiative process such as coherent Smith-Purcell radiation (SPR), is particularly promising with this respect. In this technique the beam is made to radiate a small amount of electromagnetic radiation and the temporal profile is reconstructed from the measured spectral distribution of the radiation. We summarise the advantages of SPR and present the design parameters and preliminary results of the experiments at the FACET facility at SLAC. We also discuss a new approach to the problem of the recovery of the 'missing phase', which is essential for the accurate reconstruction of the temporal bunch profile.
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