Experimental and theoretical aspects of the superconducting continuous film store

An experimental evaluation of the superconducting continuous film store in the form originally proposed by Burns et al. of RCA is presented and compared with that of a similar storage cell in which the drive lines are in-line rather than orthogonal. Experimental data on switching thresholds and the effects of various disturb pulse sequences as functions of such parameters as temperature, film thickness, film purity, and drive line width are discussed, and a simple theoretical model is proposed. The in-line cell is shown to have distinct advantages over the orthogonal cell particularly as regards the tolerances and the effects of certain disturb pulse sequences. The results show that an in-line storage cell may be operated over a temperature range of approximately 0.10°K with a tolerance over this range always greater than ±10 percent. In addition, a new bit-organized storage matrix is proposed using this configuration.