Check for light leaks with fibers darked - 2d

Check for light leaks with fibers darked - 2d - 0.1 sec

These graphs should show light leaks with fibers darked - 2d - 0.1 sec . See excerpt from Tasks doc below.

These darks were taken a 5 frames in one file and with a integration time of 0.1 sec.

Tests 1 and 2 below should be done each time the setup is moved or significantly reconfigured, though in the future only one or two long integration time FDI scans would likely be required to confirm the absence of light leakage.

2. Check for light leaks with fibers darked This tests for light leaks everywhere, the spectrograph and the camera. The sphere source should be turned on, the fibers uncapped but stuck into the tube, the curtains down, the room lights off

a. Light sources off, all fibers darked
b.Image sequence for this test: 5 BI, 10LI, 5BI The desired sequence for c and d below. By “5 BI, 10LI, 5BI” we mean take five with the CCD camera closed, 10 with the shutter in normal operation, 5 with it closed.
c.Take a 10 FDI image set @ 600 second integration time That is, do the 5BI, 10LI, and 5BI at 600 s
d.Take a 10 FDI image set @ 0.1 second integration time Same as c but 0.1 s
e.Analysis

i. Calc light – dark for 2c
ii. 2c should be similar to 1b
iii. Check for more ADU in the track area vs dark areas
iv.Confirm no light leakage before proceeding
v.(hint – some black rubber caps are not dark in room light
vi. 2d is for later reference

Analysis: eiii, 2d should be similar to 1b

Note that in these graphs, the first image/frame from each file (red and cyan line) are lower than the following images! The black line is the 1b dark, which was collected wth just one image/frame in the file. The question is why is the first frame of the darks lower. Is this a cleaning issue?? Ie would doing a clean between frame help? Notice also that is affect decrease from track 1 to track 14??

Also note the 1c data is slightly higher than the 2d data???

Analysis: eiii, Check for more ADU in the track area vs dark areas using the 0.1 sec 2d data.

The gray lines are the dark tracks between the light tracks. Normally I only use one row of pixels between the light tracks but that created very noisy data. So I meaned 19 pixels around the between dark tracks. Looks pretty good.

pwd: C:\zflora\mldata\MOBY2\Intital_testing\091208
Date: 10-Dec-2009 10:27:48
Created from marktasks_2d(1)