Cold field-emission cathode noise analysis

• Autorzy: Knápek A. , Grmela L. , Šikula J. , Šik O.
• Języki publikacji: PL

Abstrakty

EN

Noise diagnostics has been performed on the cold field-emission cathode in high-vacuum. The tested cold fieldemission cathode, based on tungsten wire with ultra-sharp tip coated by epoxy was designed to meet the requirements of transmission electron microscopy, which uses a small and stable source of electrons. Current fluctuations are reduced by improving the structure and fabrication technology. Noise was measured both in time and frequency domains, which gives information about current fluctuations and also about charge transport. Mutual correlation between the noise spectral density, extractor voltage and beam brightness was analyzed.

Słowa kluczowe

EN

cold field-emission cathode; noise diagnostics; epoxy coating

• Wydawca: Komitet Metrologii i Aparatury Naukowej PAN
• Czasopismo: Metrology and Measurement Systems
• Rocznik: 2012
• Tom: Vol. 19, nr 2
• Strony: 417--422
• Opis fizyczny: Bibliogr. 10 poz., rys., wykr.

Twórcy

autor

Knápek A.

autor

Grmela L.

autor

Šikula J.

autor

Šik O.

• Brno University of Technology, FEEC, Dept. of Physics, 616 00 Brno, Czech Republic,

Bibliografia

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• [5] Slaidinš, I. Accuracy of Noise Measurements for 1/f and GR Noise. Advanced Experimental Methods For Noise Research in Nanoscale Electronic Devices. Springer, 978-1-4020-2169-5, 151, 271-278.
• [6] Xu, N.S., Ejaz Huq, S. (2005). Novel cold cathode materials and applications. Materials Science and Engineering, R: Reports, 48(2-5), 47-189.
• [7] Diubua, B.C., Chubun, N.N. (1991). Emission properties of Spindt-type cold cathodes with different emission cone material. IEEE Transactions on Electron Devices, 38, 2314-2316.
• [8] Sedlák, P., Majzner, J., Šikula, J. (2009). Relation and its validity for piezoelectric ceramics considering temperature. In Proceedings of 20th International Conference on Noise and Fluctuations, Pisa (Italy), 141-144.
• [9] Sedlák, P., Majzner, J., Šikula, J. (2011). Noise in Piezoelectric Ceramics at the Low Temperatures. Radioengineering, 20(1), 200-203.
• [10] Knápek, et al. (2011). Noise of Cold Emission Cathode. In ICNF 2011: 21st International Conference on Noise and Fluctuations. Toronto, Canada: IEEE, 84-87.