| Paper |
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| MOPAB139 |
High Resolution Imaging Design Using Permanent Magnet Quadrupoles at BNL UEM |
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- G. Andonian, T.J. Campese, I.I. Gadjev, M. Ruelas
RadiaBeam, Santa Monica, California, USA
- M.G. Fedurin, K. Kusche, X. Yang, Y. Zhu
BNL, Upton, New York, USA
- C.C. Hall
RadiaSoft LLC, Boulder, Colorado, USA
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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).
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB139
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| About • |
paper received ※ 26 May 2021 paper accepted ※ 28 May 2021 issue date ※ 18 August 2021 |
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