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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 17:48 |
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Conference: Bucharest University Faculty of Physics 2017 Meeting
Section: Solid State Physics and Materials Science
Title:
Advanced Kelvin Probe Operational Methodology for Space Applications
Authors:
Eugeniu M. POPESCU (1), Gabriel CHIRITOI (1), Aurelian A. RADU (1), Ana Caramete (1), Laurentiu CARAMETE (1), Alexandru PAVALAS (1), Mihai MARGARITESCU (2), Ana Maria E. ROLEA (2), Teodor NECSOIU (3), Alexandra ENUICA (3)
*
Affiliation:
1) Institute of Space Science, Magurele, Romania
2) National Institute of Research and Development in Mechatronics and Measurement Techniques, Bucharest, Romania
3) S. C. Optoelectronica 2001 S. A., Magurele, Romania
E-mail
empopescu@spacescience.ro
Keywords:
Kelvin probe, surface potential, patch effect
Abstract:
Kelvin Probes (KPs), whether macroscopic or attached to scanning probe microscopes (SPMs), are used for the mapping of the surface potential of materials under high vacuum or environmental conditions. However, currently available KP instruments suffer of a major drawback, namely they either cannot scan at all sample surfaces with ~ cm2 size areas (e.g. SPMs), or if they can (e.g. macroscopic KPs), they are extremely slow and hence inappropriate for the time scales required by space experiments such as SR-POEM or LISA/NGO, or by studies of spacecraft charging. Under these circumstances, we will present an advanced KP operational methodology that will allow for the fast scanning of large area sample surfaces at time scales that offer a better match with the requirements of space applications. This methodology underlies a novel KP instrument which is currently under development at the Institute of Space Science.
Acknowledgement:
The present work has been supported by MEN/MCI-UEFISCDI through the Priority Domains Partnerships Program, contract 279/2014.
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