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BCS Surface Resistance


This webpage calculates BCS surface resistance under wide range of conditions, and is based on a program by Jurgen Halbritter. [J. Halbritter, Zeitschrift für Physik 238 (1970) 466]

Enter material parameters below, and click submit to calculate the BCS surface resistance. Results are given in a new window.
Please be aware that frequencies much lower than 1 MHz may cause substantial processing times (depending on the user's computer).

Frequency (MHz):
Transition temperature (K):
London penetration depth (A):
Coherence length (A):
Accuracy of computation:
Temperature (of operation):

About Srimp

SRIMP is a program written by Jurgen Halbritter to calculate the BCS surface resistance of a superconductor. The method of calculation incorporates the full BCS theory. Five material parameters are required to describe the superconductor:

  1. The superconducting transition temperature
  2. The energy of the superconducting gap (entered as Delta(T=0)/kTc)
  3. The London penetration depth, Lamda, at T=0
  4. The coherence length, Xi, at T=0
  5. The electron mean free path, l, at 4.2K

The default values for these parameters are those of 200 RRR niobium. Additional input data required are:

  1. The frequency (entered in MHz)
  2. The temperature at which calculations are to be made
  3. The degree of accuracy desired in the solutions

The default accuracy of .001 gives acceptable solutions for most applications.

Acknowledgements: The code featured on this webpage is a "translation" of Jurgen Halbritter's original FORTRAN code into Javascript [J. Halbritter, Zeitschrift für Physik 238 (1970) 466]. This translation was done by Hunter Swan, a Cornell undergrad students who worked in our group during the spring of 2012.

High temperature vacuum furnace

High temperature vacuum furnace for the production of Nb3SN via vapor diffusion.