Abstract:

It doesn't seem easy to improve the MICH and PRCL FF performance by changing the gain.
So, I keep current setting for them.

Detail:

I measured the Tf from MICH OUT to DARM to optimize MICH FF gain.
Figure 1 shows the measured TF with various condition.

Blue line shows the reference, which was optimized just before joining O4c.
Green line shows the current TF before optimization.

To improve the MICH FF performance, a gain of 1.11 is better than the gain of 1 (compared with brown and pink line in fig1).
However, even though changing the MICH FF gain to 1.11, overall performance (after engaging PRCL FF at the same time) of MICH FF becomes worse (compared with green and cyan lines).
I also tried to optimize MICH2PRCL FF and PRCL2DARM FF but it is hard to find the good configuration with a short term.

So, I keep FF setting as it was.