Optimization of dc SQUID voltmeter and magnetometer circuits
نویسندگان
چکیده
منابع مشابه
Four layer monolithic integrated high T, dc SQUID magnetometer
Y13aZCus0,-, based monolithic integrated dc SQUID magnetometers, consisting of a dc SQUID integrated with a flux transformer on a single bicrystalline substrate, have been fabricated and characterized. The devices consist of four layers, including two superconducting layers, and first realizations operate up to 73 K. A maximum voltage modulation of 32 ,u,V is observed at 40 K. A field sensitivi...
متن کاملUltimate limitation of the SQUID magnetometer
The Superconducting QUantum Interference Device is used to detect weak biomagnetic signals since in the early seventies. In that time the measurement was based on point contact rf SQUIDs operated at 20 MHz, with to a flux noise of the order of 10-4 Φ 0/ √Hz . After finding methods to fabricate reliable thin-film devices, the dc SQUIDs started gradually replace the rf SQUIDs. [1] The dc SQUID wi...
متن کاملNoninvasive Measurement of Gastric Propagation Using a Squid Magnetometer
A vector Superconducting QUuntum Interference Device (SQUID} magnetometer wus used to meusure the magnetic fields nssociated with propagation of gustric electrical uctivity. Measurements of the magnetic field vector were consistent with the presumed pattern of current propagation in the gastric musculature. Further studies using two SQUID systems ullowed the first noninvasive determination of t...
متن کاملNoninvasive diagnosis of mesenteric ischemia using a SQUID magnetometer.
OBJECTIVE The authors assessed the ability of a Superconducting Quantum Interference Device (SQUID) magnetometer to noninvasively detect mesenteric ischemia in a rabbit model. SUMMARY BACKGROUND DATA Superconducting Quantum Interference Device magnetometers have been used to detect magnetic fields created by the basic electrical rhythm (BER) and to detect changes in BER of exteriorized bowel ...
متن کاملA 19-Channel d.c. SQUID Magnetometer System for Brain Research
A lPchanne1 d.c. SQUID magnetometer system for neuromagnetic investigations is under constuction. The first-order gradiometers for sensing the signal are placed in a hexagonal configuration. D.c. SQUIDS based on niobium/aluminium technology have been developed, leading to a field sensitivity of about 5 fT/JHz. SQUID read-out is realized with a resonant transformer circuit at 100 kI-Iz. The mult...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Low Temperature Physics
سال: 1979
ISSN: 0022-2291,1573-7357
DOI: 10.1007/bf00119198