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Reports until 12:41, Tuesday 11 March 2014
H1 SEI (INS)
hugh.radkins@LIGO.ORG - posted 12:41, Tuesday 11 March 2014 (10683)
WHAM4 IAS/SEI/HEPI Coarse Chamber Closeup

Finally got to completing the HEPI Actuator connection, evaluating the position numbers and zeroing the IPS.  Attached are 5 pages from my log book, it's all I've got to jog my memory so best to put it in here.

Page1(95)--Calcs & givens for position

Page2(96)--Observation of Horizontal position and calculation of errors

Page3(97)--Observation of starting Elevations & while making adjustments (next page)

Page4(98) --Locked Dial Indicator(DI) readings, HEPI floating & final readings after correcting elevation and positions

Page5(101)--(week later)Prepare for HEPI Actuator connection.  Found DI2 off registration and DI3 had a large horizontal shift but vertical was fine.  Swung the DI2 back in place and verical was good again, I didn't try to put the horizontal back--see me if you want details there.  This leads me to believe the south side DIs were disturbed somehow horizontally as the north side DIs show almost no motion from Page 98 numbers.

After the L4Cs were leveled and the Actuators attached, if the south side DIs are 'reset' on March3, there is possibly 100uradCCW rotation from final observation from Page97.  It was already CCW 100urads so we could be at 200+CCW now.

Still, I decided not to hold up progress here, we can revisit this later if requested.

I zero'd the HEPI IPS (<50cts{655cts/0.001"}), inspected the Actuator Plate/Bellows Shield gaps (need to do range of motion tests,) and locked the HEPI (for door install.)

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