| Автор | H J M ter Brake |
| Автор | J Flokstra |
| Автор | W Jaszczuk |
| Автор | R Stammis |
| Автор | G K van Ancum |
| Автор | A Martinez |
| Автор | H Rogalla |
| Дата выпуска | 1991-01-01 |
| dc.description | A l9-channel DC SQUID based neuromagnetometer is under construction at the University of Twente (UT). Except for the cryostat all elements of the system are developed at the UT. It comprises 19 wire-wound first-order gradiometers in a hexagonal configuration. The gradiometers are connected to planar DC SQUIDS fabricated with a Nb/Al, AlO<sub>x</sub>/Nb technology. For this connection we developed a method to bond a Nb wire to a Nb thin-film. The SQUIDs are placed in compartmentalised Nb modules. Further, external feedback is incorporated in order to eliminate cross talk between the gradiometers. The electronics basically consist of a phase-locked loop operating with a modulation frequency of 100 kHz. Between SQUID and preamplifier a small transformer is used to limit the noise contribution of the preamplifier. In the paper the overall system is described, and special attention is paid to the SQUID module (bonding, compartments, external-feedback setup, output transformer). |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | The UT 19-channel DC SQUID based neuromagnetometer |
| Тип | paper |
| DOI | 10.1088/0143-0815/12/B/006 |
| Print ISSN | 0143-0815 |
| Журнал | Clinical Physics and Physiological Measurement |
| Том | 12 |
| Первая страница | 45 |
| Последняя страница | 50 |
| Аффилиация | H J M ter Brake; University of Twente, Faculty of Applied Physics, PO Box 217, 7500 AE Enschede, The Netherlands |
| Аффилиация | J Flokstra; University of Twente, Faculty of Applied Physics, PO Box 217, 7500 AE Enschede, The Netherlands |
| Аффилиация | W Jaszczuk; University of Twente, Faculty of Applied Physics, PO Box 217, 7500 AE Enschede, The Netherlands |
| Аффилиация | R Stammis; University of Twente, Faculty of Applied Physics, PO Box 217, 7500 AE Enschede, The Netherlands |
| Аффилиация | G K van Ancum; University of Twente, Faculty of Applied Physics, PO Box 217, 7500 AE Enschede, The Netherlands |
| Аффилиация | A Martinez; University of Twente, Faculty of Applied Physics, PO Box 217, 7500 AE Enschede, The Netherlands |
| Аффилиация | H Rogalla; University of Twente, Faculty of Applied Physics, PO Box 217, 7500 AE Enschede, The Netherlands |
| Выпуск | B |
