I test two mirrors, one is what we are trying to test, the other one is what I set as reference.
I have uploaded three jpep files(result) into the e-file section on my website. Please check it. Mirror Section
Mirror_Test.jpg
I use one microscope slide to attach two gratings for source and detector respectively. That's because we want to make sure these two gratings are parallel, not cause any deflection on the result in ideal situation.
Mirror_Ref.jpg
use the same device I mentioned above.
Improved_Mirror_Ref.jpg
use two slides with two gratings, put together like sandwich to make sure further.
Thursday, May 18, 2006
Tuesday, May 09, 2006
Parabolic Mirror Test
I played Ronchi Test for almost one week. First, I didn't get any pattern as I saw on website. Try a lot of different distance, still no sign.
Later, I read manual again, found a serious problem---no grating for source. All right, I added and found a clear view. Unfortunately, it looked so nice if I use my eyeball to see the mirror, it's terrible once after I use Ronchi Test and put image in the monitor.
I paged brad, he suggested I should use one single grating for source and monitor since bow lines may be caused by bending or misaligning two grating for source and monitor respectively.
I tried, however, still got same thing. I'm pretty sure it's not because of monitor lens since this time I use my eyes to see it.
Anyway, I will use webcam for this test tomorrow, so I can save the image on the computer and print.
Later, I read manual again, found a serious problem---no grating for source. All right, I added and found a clear view. Unfortunately, it looked so nice if I use my eyeball to see the mirror, it's terrible once after I use Ronchi Test and put image in the monitor.
I paged brad, he suggested I should use one single grating for source and monitor since bow lines may be caused by bending or misaligning two grating for source and monitor respectively.
I tried, however, still got same thing. I'm pretty sure it's not because of monitor lens since this time I use my eyes to see it.
Anyway, I will use webcam for this test tomorrow, so I can save the image on the computer and print.
Wednesday, May 03, 2006
BigBite Field Mapping and Mirror Test
May 2,
Brad and I measured the field at both side of detector package of bigbite. It took about 2 hours to finish. The result is stapled onto my logbook(real notebook).
Later, I read the procedure of testing parabolic mirror for Gas Cerenkov. Finally, I decided to use Ronchi Tester to test it since it's the simplest one for rookie.
Here is the 2 websites I read
Ronchi Test1
Ronchi Test2
May 3,
I measure all the parameters for mirror except focal length and surface tolerance. I will continue on it tomorrow morning.
Brad and I measured the field at both side of detector package of bigbite. It took about 2 hours to finish. The result is stapled onto my logbook(real notebook).
Later, I read the procedure of testing parabolic mirror for Gas Cerenkov. Finally, I decided to use Ronchi Tester to test it since it's the simplest one for rookie.
Here is the 2 websites I read
Ronchi Test1
Ronchi Test2
May 3,
I measure all the parameters for mirror except focal length and surface tolerance. I will continue on it tomorrow morning.
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