We start recording an IM with 10 modes on the red pupil:
IM: 10modes_ol_red.
Activating the offload to hexapod we get a -0.1mm of Z offload, while on other pupils we didn't see that...
We record the
IM: 10modes_cl_red, 50modes_cl_red, 150modes_cl_red but we find that the 50 and 150 are not good, we never got the 50 modes reconstructor...
19:27: new
REC: 50modes_cl_red
We try to record again the IM closing the loop on 50 modes:
REC: 150modes_cl_red2. We try to close the loop but it diverges. The bottom right of the pupil is very dim, maybe for misalignment maybe for obscuration from the gusset and gauge...
We try also 100 modes but it doesn't work.
50 modes are the only ones that work.
We try to move the pupil until we get a good illumination pattern:
15:08: we try to close the loop on the on-axis source using FLAO. In this way we compensate the aberrations coming from ASM and misalignment and we record just the hologram aberrations on LGSW.
TN |
Notes |
20140511_231014 |
FLAO CL on on axis source |
We get a PSF of 1.08px FWHM on LUCI (image
#62) and about 60mas on CCD47:
LUCI images are stored here:
/home/argos/luci_data/20140512/
We acquire several darks on LUCI:
#63 to
#76
We acquire
optical loop data on FLAO:
20140511_232907, 20140511_232927
Now we center the yellow pupil on ARGOS, we close the loop with 150 modes. Taking image with LUCI we clearly see a PSF dominated by coma (
#79):
TN |
Notes |
20140511_235846 |
CL on yellow, 150 modes, LUCI images acquired #79 |
20140511_235917 |
" |
We acquire the ASM shape saving a
ASM shape: yellow_loop.sav.
We switch to the blue pupil, we close the loop with 150 modes.
TN |
Notes |
20140512_000713 |
CL on blue, 150 modes, LUCI images acquired #82 |
The coma pattern seems rotated by 120deg...
DARK: 20140511_221923 -> 200 frames averaged...
1:02 we switch on the yellow and red diodes we try to close the pupil and jitter loops but the controller crashes... solved later.
Zemax simulation of LUCI images
We tryed to simulate this situation in Zemax: we optimized the ASM shape to minimize the aberrations on the Yellow LGSW arm. We rescaled the geometrical image on the LUCI focal plane to have a 0.075mm/px scale and we started shifting along Z the LGSW to obtain the same pattern of the figures above. The image below has been taken with a 15mm shift on the LGSW (away from the dichroic).