J. Driggers, J. Kissel, J. Warner

While beginning recovery of the IFO, Jenne noticed that the Y arm fiber polarization was high (showing ~24% of input light rejected, where < 5% is where we want to be). We followed instructions similar to what can be found in the OPS Wiki. Since the percent-of-rejection channels are buried deep in the heart of the ALS MEDM screen jungle, I pulled the channels,
      H1:ALS-X_FIBR_LOCK_FIBER_POLARIZATIONPERCENT
      H1:ALS-Y_FIBR_LOCK_FIBER_POLARIZATIONPERCENT
into a StripTool, which made it easier to by-eyeball, hand-tune the value via the tiny CDS laptop we were using. Also, there's no rhyme or reason to which of the three knobs to use; we just slowly turned all the knobs in both directions until we started to see the rejected light value go down sub-5%. While there, we also brought the X-arm below 5%.

The fiber polarization tuning box was turned off once we were done.