LL

The Program for Extraction of
2D Inductances
of Multi-Superconductor Transmission Lines

The program LL was developed as general, fast and reliable tool for the extraction of inductances of stretched multi-superconductor transmission lines with 2D approach. It can be implemented in CAD applications for the extraction of model parameters. Recently calculations of impedance were added.

Main features of the program are:

• The program is based on the London model of superconductive current and accurately take into account the London effects of finite penetration depth, proximity effects and fringing factors.
• The program exploit new numerical technique which is different from the finite differences and variational approach. The numerical technique of LL consist in rigorous and accurate boundary reduction of the problem on the boundary of conductors (direct Boundary Element Method).
• As result in the improvements in the basic approach to the numerical simulation, LL has next advantages:
  1. Arbitrary form of the cross-sections of the conductors (usually only the rectangular conductors are considered);
  2. The program is more precious but less time and memory consuming then other known;
  3. The program is more numerically stable.
• New version calculate impedances.

Some results of inductances calculations with LL are presented in SDE CAD tools, Inductance Rodeo Results

This program is written using wxWidgets. Old program without impedances and with manual is here

Here is reference on different old and less effective approach for superconductors inductances extraction.

This document has been written by M. Khapaev