Print Email Facebook Twitter Concept and design of a beam blanker with integrated photoconductive switch for ultrafast electron microscopy Title Concept and design of a beam blanker with integrated photoconductive switch for ultrafast electron microscopy Author Weppelman, I.G.C. (TU Delft ImPhys/Charged Particle Optics) Moerland, R.J. (TU Delft ImPhys/Quantitative Imaging) Hoogenboom, J.P. (TU Delft ImPhys/Charged Particle Optics) Kruit, P. (TU Delft ImPhys/Charged Particle Optics) Date 2018 Abstract We present a new method to create ultrashort electron pulses by integrating a photoconductive switch with an electrostatic deflector. This paper discusses the feasibility of such a system by analytical and numerical calculations. We argue that ultrafast electron pulses can be achieved for micrometer scale dimensions of the blanker, which are feasible with MEMS-based fabrication technology. According to basic models, the design presented in this paper is capable of generating 100 fs electron pulses with spatial resolutions of less than 10 nm. Our concept for an ultrafast beam blanker (UFB) may provide an attractive alternative to perform ultrafast electron microscopy, as it does not require modification of the microscope nor realignment between DC and pulsed mode of operation. Moreover, only low laser pulse energies are required. Due to its small dimensions the UFB can be inserted in the beam line of a commercial microscope via standard entry ports for blankers or variable apertures. The use of a photoconductive switch ensures minimal jitter between laser and electron pulses. Subject Beam blankersPhotoconductive switchesScanning electron microscopy (SEM)Transmission electron microscopy (TEM)Ultrafast electron microscopy (UEM) To reference this document use: http://resolver.tudelft.nl/uuid:1317599d-25d0-448f-b3b7-2ab03466681d DOI https://doi.org/10.1016/j.ultramic.2017.10.002 Embargo date 2018-07-01 ISSN 0304-3991 Source Ultramicroscopy, 184, 8-17 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2018 I.G.C. Weppelman, R.J. Moerland, J.P. Hoogenboom, P. Kruit Files PDF 1_s2.0_S0304399117303224_ ... averne.pdf 1.82 MB Close viewer /islandora/object/uuid:1317599d-25d0-448f-b3b7-2ab03466681d/datastream/OBJ/view