Literaturnachweis - Detailanzeige
Autor/inn/en | Panitz, J. A.; Rempfer, G. |
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Titel | A transmission electron microscope for lecture demonstrations. |
Quelle | In: American journal of physics, 74 (2006) 11, S. 953-956
PDF als Volltext |
Sprache | englisch |
Dokumenttyp | online; gedruckt; Zeitschriftenaufsatz |
ISSN | 0002-9505; 1943-2909 |
DOI | 10.1119/1.2345656 |
Schlagwörter | Elektronenmikroskop; Physik; Elektronenlinse; Demonstrationsexperiment; Elektronenlinse; Elektronenmikroskop; Physik |
Abstract | A simple transmission electron microscope (TEM) suitable for lecture demonstrations is described. In this TEM electrons are created in a glow discharge between two parallel electrodes in air at a reduced pressure. The electrons are collimated by a small hole in the anode, focused by a solenoid that acts as an electromagnetic lens, and imaged on a thin layer of phosphor deposited inside an Erlenmeyer flask. An image of a biological sample placed between the source and the lens can be magnified about 20 times. The microscope uses inexpensive components that can be quickly assembled during a demonstration. The TEM provides a visual and memorable display that highlights phenomena such as mean-free-path, charged particle optics, electrical discharges, and cathodoluminescence. © 2006 American Association of Physics Teachers. |
Erfasst von | Arbeitsgruppe Didaktik der Physik, Universität Osnabrück |
Update | 2007/2 |