Multichannel magnetography

Multichannel magnetography becomes more and more important for biomagnetism. Because of the highly time-consuming measurements with one-channel devices. Furthermore, these devices make it possible to investigate simultaneous events which occur only during a short interval of time from different points. Along with the development of multichannel systems arise some new physical problems, especially the so-called cross-talk between single channels. This paper describes, the authors' aim: to build a 5-channel-system with the possibility of balancing it from outside the dewar without removing the system out of liquid helium