NAOJ GW Elog Logbook 3.2
Displaying report 1-1 of 1.
MarcEisenmann - 11:26, Sunday 18 May 2025 (4025)
aztec 60 40 1 birefringence
Some measurement where on-going but the input polarization check was with a quite small area (2*2mm), the power a bit large(? at 6.5mW) but more importantly after 17h it was only at 20% of the measurement duration.
I reduced the laser current to 1A, increased the input polarization area to 5*5mm, changed the sample measurement to circular area at the sample center (x=322,y=189) and reduced measurement radius to 28mm.
the y position for input polarisation check was changed from 90 to 140 to reduce travel time.
Also, the data are now saved in the correct folder (aztec_60_40_1/birefringence)
Measurement has error and has stopped. See pic for error.
This error is unusual, because it seems there is some issue with the code during writing the data.
Should I restart measurement?
Also, if all the files are being saved wth old data, how do we differentiate them?
For now, I restared measurement with polarizer position, 41.25 and map count as 9
turned off laser for safety visit.
Might be worth to understand issue before restarting measurement
'Also, if all the files are being saved wth old data, how do we differentiate them?' : all files have different names, I'm nto sure to see the issue
I understand the filenames are different. My question was not related to the file name. But, rather to the folder in which we save. Now, we are saving all files in same folder. When we specify in the birefringence script that use all the files in the folder, we will end up using data from different times. So, at the end we will have to write the names of the files with hand?
The 'load_measurement' function does it automatically.
Otherwise, you can indeed load the filenames by hand as we did up to writing the 'load_measurement' function.