rf SQUID detector for single‐ion trapping experiments

Autor:	Robert M. Weisskoff, Robert W. Flanagan, G. P. Lafyatis, Eric A. Cornell, David E. Pritchard, K. R. Boyce
Rok vydání:	1988
Předmět:	Superconductivity Physics Condensed matter physics business.industry Detector General Physics and Astronomy Ion trapping law.invention SQUID law Scanning SQUID microscopy Condensed Matter::Superconductivity Optoelectronics Equivalent circuit business Transformer Electronic circuit
Zdroj:	Journal of Applied Physics. 63:4599-4604
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.340137
Popis:	We have designed and constructed a novel superconducting detector sensitive enough to detect the axial motion of a single, trapped ion. This detector employs a tuned, superconducting transformer matched to a rf SQUID (superconducting quantum interference device) to yield an effective current sensitivity of 2.7×10−15A/(Hz)1/2 at 160 kHz. To optimize the detection system, we have used existing small‐signal equivalent circuit models, and thus have tested these models in a new regime. We include details of our superconducting circuitry and of the modifications required to stabilize the commerical SQUID controls at 160 kHz. Finally, we present typical detected signals from trapped ions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e0397ffb1254c7f6ab61feb37f630234 https://doi.org/10.1063/1.340137 Zobrazit plný text záznamu