Engineering 2011JanFeb

2011 January 25:

FB: began pumping on CHAMP. Set up plan with Rafael for the alignment tool. Restructured the CHAMP directory on wolverine and updated the wiki instructions for CHAMP quickstart. Tracked power failure for CHAMP mounts to a disconnected cable on the MAXO box.

2011 January 26:

FB: there is an annoying gtk setting issue which makes running any gui remotely on anything other than OS X a problem. I've tried modifying the gtkrc on wolverine but to no effect. Worked more on the Alignment GUI, cleaned up the code to remove deprecated function calls and warning from IRCam gui. No more need to press enter to activate the channel (R1, L2, ...) selection.

2011 January 27:

FB: cooled the dewar, final pressure 6e-7. Started working on astropci code. Gone to JDM presentation at Caltech in the afternoon.

2011 January 28:

FB: refilled dewar, modified IRCam GUI to add automatic channel and quadrant selection. Started alignement of CHAMP table. Moved jdm_opds into a configuration file.

2011 January 29:

JDM + FB : debug of the spooler + saving data through rt_pipe. Needed to use sudo ./spooler... Found internal fringes on W1W2 B1B2, using the ESP RETRO and then delayline retros. See Champ manual for opd values.

2011 January 30:

JDM: worked on generating opd map.

JDM: replaced a bad PZT cable for PZT 3 (on beam 5) with a new one from piezojena, we still have one spare in the mirc cabinet.

FB: Test of the repeatability of the pickoff mirror positions. Fringes initially at 3.3931 on ESP. GUI says 210175 offsets on both IR1 and IR2 (doubtful). Refresh does not seem to work...

Homing all. Flux drops from 100+ to 20... Moving back to 210175. Nothing at +/- 0.3 mm.

Homing all the mounts, Home = against the platform.

(in all the following, closure BC = 0)

IR1 0 IR2 0 : Fringes at 3.50 mm.

IR1 100000 IR2 100000 : fringes at 3.4539 mm

Test of ESP repeatability:

Home + Back to 3.4539 : ok Go to 4.45 then 2.45 then 1.45 then 3.45:ok

TESTS OF IR1 AND IR2 USING DIRECT "MOVE TO"

Test of IR1 repeatability (waiting ~ 10 seconds between each move)

From 100000, move to 50000 and then back to 100000: ok

Move to 200000 then back to 100000: ok, within the fringe range.

50000, 200000, 100000: ok

Test of IR2 repeatability (waiting ~ 10 seconds between each move)

From 100000, move to 50000 and then back to 100000: ok

Move to 200000 then back to 100000: ok

50000, 200000, 100000: ok

REHOME IR1 + 100000 : ok

REHOME IR2 + 100000 : ok

TESTS OF IR1 AND IR2 USING PADDLES

Step size = 10 microns.

IR1: Relaxed clicking down to 95000 then back to 100000: ok

IR1: Nervous clicking down to 95000 then back to 100000: ok

IR2: Relaxed clicking down to 95000 then back to 100000: ok

IR2: Nervous clicking down to 95000 then back to 100000: ok

Home All (IR1+IR2) + Back : ok

CONCLUSION: IR1 and IR2 seem to be ok.

With IR1 and IR2 platforms aligned with the mounts:

Offset IR1 175910

Offset IR2 172160

Fringes ESP 3.1540

FB: tried to align on B3-B4 but had a hard time moving offsets to get the spot in.

2011 January 30:

FB: goal = generate opd maps for B3-B4 and more

Used offsets row =8 and col = 20.

Homed pickoff mirrors + retro.

Manually aligned the mounts with pickoff mirrors, result:

IR3 173123

IR4 172835

Found fringes at 3.056 mm (double spot for R4, updated wiki).

Recorded data for opd maps, with R4 and L4 fringes.

Repeatability tests:

Home IR3 and IR4 and back: slightly off by 0.03 microns.

Moving only IR3, ESP RETRO to the max amplitude fringe, home then back: ok

Moving only IR4, ESP RETRO to the max amplitude fringe, home then back: ok

IR3 50000, 200000, current : off by 8 microns (0.004 x 2)

IR4 50000, 200000, current : off by 4 microns

IR3: 20000-200000-20000-200000-20000-200000-current: ok

IR4: 20000-200000-20000-200000-20000-200000-current: ok