The beam position on ETM looks quite low to me, and that means the beam is low on the primary optic of the TMS telescope too.

The only way to fix this properly is to give correct offsets to green QPDs.

Yuta calculated the QPD PIT or YAW normalized output against pure translation of the beam on the sled:

QPD1 output VS input: +0.733 /mm

QPD2 output VS input: -0.014 /mm

You need to divide these by 20 to get the offset that is required to move the beam by 1mm:

QPD1 offset VS ETM beam pos: +0.036/mm

QPD2 offset VS ETM beam pos: -0.007/mm

I started changing the offsets that Stefan set some time ago (QPD PIT = -0.464, QPD2 PIT = -0.084), and found that we need to go positive for QPD1 to move the beam up.  I didn't have time to center the beam on ETM and confirm that dither alignment didn't run away, right now the offsets are kind of arbitrary (QPD1 P = 0.232, QPD2 P =0), if you want you can go back to the original numbers.

Once ISI performance is better we should be able to dither ETM and ITM and slowly perform a2l decoupling using QPD offset (for ETM beam pos) and ITM angle (for ITM beam pos) as our knobs while Stefan's dither alignment is acting on ETM angle and one of the PZTs.

So that IAS people would know: I took a  breadboard for Brunson mount from EY to SQZ bay so we can mount our spare Prometheus laser on one of Brunson mounts/legs/whatevers. This is in preparation for ETMY green trans/refl measurement.

PSL Checklist: OK

8:15AM - 4:00PM - Baylors working on the X-ARM 
8:59AM - 3:54PM - Corey at EY working on TMS cabling
8:54AM - 4:00PM - Jax going back and forth between MY and EY
8:54AM - 9:10AM - Justin transitions LVEA to laser safe
9:28AM - 4:00PM - Jeff Lewis in west bay looking for OFI parts
1:10PM - 3:44PM - Fil and crew at EY pulling cables
3:25PM - 3:30PM - CDS crew takes down FWP1
3:41PM - 4:45PM - CDS crew reboots DAQ.
3:55PM - 4:00PM - Kiwamu transitions LVEA to laser hazard
3:45PM - 4:41PM - Soft close GV-7 for ISC work on top of HAM2 with viewports. Kyle&Gerardo for vacuum and Kiwamu&Stefan for viewports

Installing beam dump on top of HAM2. Requires a soft close of gate valves.  Permits 4407 and 4408.

Continued checking out cables for electrical shorts and running cables.  Today worked on SUS TMS cables.  Other than observing I had a flip in the wires via the feedthru we were able to say we are happy with the two SUS/BOSEM cables for the TMS.  They are connected at the Cable Bracket & have been screwed together.

Since the cable gets flipped, the pins on the D1000223 (sei-responsible cable) yesterday (pin 13 & 16), are really (pin 1 & 23).  One of these is the shield and the other is a picomotor cable.  We don't want a short with this cable, so tried looking for tight clamps or crimps in the cable.  I didn't find anything other than possibly an issue near the Cable Bracket on the Optics Table.  When I moved the cable around I was able to get rid of the short every once in a while (but it mainly stayed shorted out).  So this may be a problem cable. 

Unfortunately, this is a cable we have run out of.  So we need to either figure out how to fix it, or see if another cable will work in its place. 

Notes:

• Made sure to tighten the set of (4) screws on cable connectors which will connect to Chamber Feedthru (it's been observed that the heads of these screws protrude out & ground out the cable.
• The two SUS Seismically-responsible-cables don't have screws on the Chamber feedhtru connectors (!).

DAQ was restarted for two reasons:

New h1 broadcaster channel list, removed 3 channels added 47 channels for ODC group.

Resync DAQ to h1asc model changes.

The h1fw1 frame writer was down from 15:25 to 15:36 PST for memory upgrade to 72GB.  Frame sizes have not changed yet.

Memory upgrades

Updated the arm inital alignment model and medm screens to include 
a) A threshold for automatic enabling
b) A threshold for stopping the servo - we need this to reject hops to the 10 mode.

asc/common/models/IAL_LOCKIN.mdl
SVN revision 6940

asc/common/medm/ASC_IAL.adl
SVN revision 6941

The EtherCAT chassis 6 in the corner has been installed. The system manager was updated and is running with the new configuration. The code has been added to the PLC but still needs testing. This chassis adds controls for 2 additional VCOs with PLL, a few RF amplifier readbacks and controls for the HAM6 fast shutter.

Pulling cables from electronics racks to VEA.

Back in the fall(2013) we realized we were consuming more LN2 than normal and homed in on CP3 as the culprit. We found that it's vacuum jacket had leaked up to ~1000 microns (1 torr).

After rough pumping down to <10 microns the consumption has fallen off to a more normal rate.

Before pumping the slope was 1.3 percent per day, after pumping; 0.76 per day.

Kyle is presently working around the site with the pumping gear and will pump each a week or more.

(Alexa, Daniel, Sheila)

We just returned from EX and did a few things:

1. Adjusted delay line for remote control
   • toggled switches: 8, 4, 1, 1/8 --> 210 steps
2. Adjusted phase on delay line to 115.3deg. We tried minimizing Q as best we could by adjusting the phase; however, we were not very sucessful since the arm was not staying well aligned
3. Returned the modulation frequency to 24.407079MHz
4. Took an open loop TF of the PDH. The UGF is about 5kHz with a phase margin of 70deg
5. We measured shot and dark noise (data to come...). With ITM misaligned green REFL A PD read 6.2mW with 3V at 30dB gain.
6. Measured an RF AM offset of 25mV at IMON with ITM misaligned. With ITM aligned, the error signal peak-to-peak was 1.9V out of IMON.

Kitting up parts for OFI

Transitioning to laser safe.

TMS Cabling