* '''[[http://klog.icrr.u-tokyo.ac.jp/osl/?r=11925|Vacuum compatible soldering Technique (Y.Aso 191204)]]'''
  1. Apply the flux on the bottom of the socket.
  *Melt the solder with a soldering iron.
  *Push the melted solder against the socket.
  *After a few second, the solder wets with the surface of the socket.
  *Do the same wetting process to the wire.
  *In the above process, make sure to put a bit excessive amount of solder on the socket and wire.
  *Put the wire very close to the socket.
  *With the soldering iron, melt the solder on the wire and socket at the same time then fuse them together.
  *Release the iron and let the solder cool down.