I. Introduction
IN OUR previous papers [1], [2] a considerable stability increase of superconducting windings with additions of some extremely large specific heat capacity substances (LHCS) at helium temperatures (HoCu2 and CeCu6) was shown. These LHCS were introduced into small NbTi coils during wet-winding process in the form of powders mixed with epoxy resin by covering of each layer with such mixture. Two sets of coils were made and tested: small NbTi round coils (LHCS volumetric content about 6%) and Rutherford cable wound oval coils (LHCS content about 3%). This method of stability increase is covered with the Patent [3].