Optimization of the optical pulse energy for switches based on thin films of high-T c superconductors

Modelling the Relaxation Characteristics of Current- and Optically Controlled Superconducting Switching Elements

“…4). This phenomenon is the more conspicuous the greater thermal resistance of the substrate and the pulse duration are, which can be explained by shortening of the film effective heating time in relation to duration of the current pulse [6]. Examples of the τ T (I) relation with a hollow caused by the effect of thermal instability are shown in Fig.…”

“…Nevertheless, determining the relation between the response of HTS films and thermal processes based on the data obtained in experimental research is very difficult, as during experiments several mechanisms changing the film resistance occur, and also because HTS films have diverse parameters in different studies depending on the type of substrate, which has a significant impact on the response characteristics. In works [6]- [9] in order to examine the influence of thermal processes on relaxation characteristics of HTS thin-film elements, numerical modelling methods of the thermal mechanism of the film response on current and optical interaction were applied, which enabled to examine the impact of heat generation on the response characteristics depending on particular factors. This paper was prepared at Białystok Technical University within a framework of the S/WE/3/08 project sponsored by the Ministry of Science and Higher Education, Poland.…”