Lena/Oct 2016

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October 2016

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10/03/2016

fMCG setup TODO

  • Feedback system to keep the fields from "running away". Only the main XYZ fields need to be stabilized, the gradients don't change much day to day
  • Reduce the polarimeter noise when misbalanced

Eliminating Polarimeter noise when misbalanced

The existing current amplifier consists of two photodiodes connected in a way to add or subtract their photocurrents. The output of this passive circuit is connected to SRS current preamplifier SR570.

Passive PD connection schematic.png