• To_Do_List

This is the Phantasmical To Do list for the 40m lab: ( severely shortened Jan. 7, 2007 RA)

--In-lock alignment (This is a big one)

• Rolf & Alex are working on a new ASC code to do all IFO dither alignment based on Bram and Valera's design.

--Transfer function characterization

• This follows the item above, and everyone will be interested in the results. We need to characterize the: RSE peak optical spring coupled cavity response all open loop gains/cross coupling of signals frequency noise coupling. Finesse has shown some unexpected transfer functions to places other than the DARM signal; we should investigate these. other CARM transfer functions to non-traditional signal ports

--Ground loop

Power supplies, racks, optical tables, chambers, LSC PDs, cables etc. ** <b>Get rid of all these long cables to the control room !!</b>

Main commissioning tasks (all **) - Noise budget

• > Download the sites' noise budget via CVS and adapt to 40m based on Osamu/David/Ryan's work.

_ Controls: - Replace c1losepics/c1iscepics temporary cpu with permanent one

• that doesn't have a DHCP server running! Rolf, Alex, Jay. **

- c1susvme2 sometimes loses time synch.

• Alex?

- Replace framebuilder RAID array with fiber link to QFS system.

• Rolf, Stuart, Larry.

- LSC front end cpu starts to creep up towards 61 usec.

• 16 Hz and harmonics appear everywhere. Rob, Rolf, Alex. **

- QPD Whitening boards: whitening filters aren't switching.

• Ben, Alex. **

- Protect the front end code against NaNs from ezcademod

• and we need to prevent ezcademod from spitting out NaNs (and find out what causes it to do so in the first place). Rolf, Rob.

- vacuum breakdown trigger failed to act at 3.7 mTorr on IOO pzts _OMC pzts have to be protected also -V1 valve interlock still does not exits! - Vacuum EPICS screen: TP on/off logic; TP readout;

• EPICS state code for reading out TP3 and IPs, and for protecting/closing V1 if TP1 starts to fail. Jay, Dan.

- Front end code slows down considerably when AWG is running?

• Hasn't seemed to be a problem lately...

- LSC rack power is inadequate. Redo the system, add Sorensens?

• Jay?

- Coupling between LSC IQDemod boards and whitening boards:

• Add power regulators. Add heat sinks. Ben. **

- Convert all RFPD DC signals to their LSC PD Interface version,

• eliminate deticated DC cable (which causes ground loops). Ben. **

- The new fiber timing system from Sander seems to be working ok.

• When the sites convert to a new system, we should too!

- Still have big 60 Hz problems.

• Draw up ground loop plan, including proper grounding of rack power supplies; implement. Ben. **

- Fast DAQ signals from 1Y2.

• Are they all being read in and logged correctly, falling in meaningful range? Ben.

- Linux framebuilder?

• Rolf? Alex?

- Are all controls drawings (PDFs) up-to-date on Ben & Jay's web sites?

• LSC? ASC? SUS? Ends?

_ PSL: - Work on the PSLwatch script to handle all the PSL servo state logic.

- Modify ISS to make the DAQ signals fit in the ADC (110B has a +/- 2V range)

_ MC, MZ:

- How about that RF multiplier circuit?

• This requires making some RF filters to put in between the stages to reduce the intermodulation peaks. WE should also think about the requirements on the spectral purity of these signals.

_ SUS, LSC, ASC:

- OSEM sensor glitches: still have them?

• They were isolated to be originating in ICS100b or the VME crate itself. Due to crate 5V power supply?? Rolf has a fix, used at HEPI?

- OSEM problems diagnosed by checkosem script.

• Why are ETMX and ETMY OSEM monitors different from the rest? Why is there an abnormal sign flip on ETMX side?

- Can't put excitations into SIDE OSEM channels.

• Jay, Rolf?

_ Computers:

- We can't print to hp2550 from any of the operator consoles except linux3.

• Alex. **

- Review the stuff in ALH to see if

• important things are missing or unimportant things are present.

_ DC readout (all **):

Other:

- beamline as-built documentation. Update ACad drawings.

• Mike, all.

- cranes - overheating, failures.

• Temporary solution: don't run in standby mode. Ben.

- gutters on building.

• Steve.

- replace leaky valve on roughing pump.

• Steve.

- give CaJAGWR attachment:Kirk_CaJAGWR_281106.ppt .

kirk