THERMOMETRY IN 15 TESLA

In order to measure temperatures and viscosities in high magnetic fiel d, we have compared the behaviour of a conventional NbTi vibrating wir e viscometer to the response of a vibrating plate of Nb3Sn and calibra ted them against a field independent glass thermometer up to 15 T. The glass thermometer was calibrated in zero field against the He-3 melti ng curve and in 15 T against a region where the solid follows a Brillo uin law.