In 24 hours, the lock stretch has already used 80% of the doubled range on the HEPI bleed off.  This is not 'tidal.'  The attached plot shows the trends of the bleed to HEPI and LVEA and RefCav temps.  It looks very coincident on this 3 day trend with a big dip on the LVEA temp and the step run up on the HEPI drive. But, if this increase in LVEA temp is getting to the refcav increasing its length, the sign is wrong at HEPI.  An increase in length will lead to an increase in length.  Also, while not know with certainty, the mechanism of getting a temp change into the refcav certainly has a pretty large delay.  Any thoughts?

If this trend does not turn around soon, the lock will be lost unless we further increase the limit.  If the drive hits 0.7mm, angular integrity will start to be compromised as the IPS on HEPI reaches its linear limits