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TY - CONF AU - Andonian, G. AU - Campese, T.J. AU - Fedurin, M.G. AU - Gadjev, I.I. AU - Hall, C.C. AU - Kusche, K. AU - Ruelas, M. AU - Yang, X. AU - Zhu, Y. ED - Liu, Lin ED - Byrd, John M. ED - Neuenschwander, Regis T. ED - Picoreti, Renan ED - Schaa, Volker R. W. TI - High Resolution Imaging Design Using Permanent Magnet Quadrupoles at BNL UEM J2 - Proc. of IPAC2021, Campinas, SP, Brazil, 24-28 May 2021 CY - Campinas, SP, Brazil T2 - International Particle Accelerator Conference T3 - 12 LA - english AB - Ultrafast electron microscopy techniques have demonstrated the potential to reach very high combined spatio-temporal resolution. In order to achieve high resolution, strong focusing magnets must be used as the objective and projector lenses. In this paper, we discuss the design and development of a high-resolution objective lens for use in the BNL UEM. The objective lens is a quintuplet array of permanent magnet quadrupoles, which in sum, provide symmetric focusing, high magnification, and control of higher order aberration terms. The application and design for a proof-of-concept experiment using a calibrated slit for imaging are presented. The image resolution is monitored as a function of beam parameters (energy, energy spread, charge, bunch length, spot size), and quintuplet lens parameters (drifts between lenses). PB - JACoW Publishing CP - Geneva, Switzerland SP - 485 EP - 488 KW - experiment KW - electron KW - focusing KW - quadrupole KW - target DA - 2021/08 PY - 2021 SN - 2673-5490 SN - 978-3-95450-214-1 DO - doi:10.18429/JACoW-IPAC2021-MOPAB139 UR - https://jacow.org/ipac2021/papers/mopab139.pdf ER -