Steps Toward a Capacitance Standard Based on Single-Electron Counting at PTB
| Autor: | Alexander B. Zorin, Hansjörg Scherer, S. V. Lotkhov, G.-D. Willenberg |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Physics
Differential capacitance Physics::Instrumentation and Detectors business.industry Josephson voltage standard Electrical engineering Hardware_PERFORMANCEANDRELIABILITY Vacuum variable capacitor Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Elementary charge Capacitance law.invention Quantum capacitance Capacitor Hardware_GENERAL law Hardware_INTEGRATEDCIRCUITS Electrical and Electronic Engineering Atomic physics business Instrumentation Voltage |
| Zdroj: | IEEE Transactions on Instrumentation and Measurement. 54:666-669 |
| ISSN: | 0018-9456 |
| DOI: | 10.1109/tim.2004.843075 |
| Popis: | A capacitance standard based on the definition of capacitance C=Ne/U is realized if a capacitor is charged with a known number N of electrons (e is the elementary charge), and the voltage U across the capacitor is measured . If U is measured by means of a Josephson voltage standard, C is solely determined by quantum numbers and fundamental constants. Presently, Physikalisch-Technische Bundesanstalt (PTB) is setting up this experiment using a special type of single-electron pump, the so-called r-pump , for transferring electrons one by one onto a cryogenic vacuum capacitor with the decadic capacitance C =1 pF. We report on the progress in the setup with emphasis on the characterization of the single-electron tunneling elements. We describe the modifications of the single-electron circuit that are necessary to implement the capacitor charging experiment by using a four- or five-junction r-pump. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|