Differences

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--- mcmaster:cleaning_enc28 [2012/02/20 03:39] – created mcmaster
+++ mcmaster:cleaning_enc28 [2013/10/20 14:59] (current) – external edit 127.0.0.1
@@ Line 8: / Line 8: @@
 {{gallery>:mcmaster:contamination:cleaning_enc28:01_post_dd_acetone_shake.jpg}}
+Shook about a minute in acetone in a 50 mL PP vial.
 ====== Step 2: acetone sonication ======
 {{gallery>:mcmaster:contamination:cleaning_enc28:02_post_dd_acetone_sonic.jpg}}
+Then tried ultrasound and it removed a few larger objectects
+Presumably those were lose and the small parts still there are the locations there were attached
+This may indicate that the sample needs further acid treatment to be really clean
 ====== Step 3: acetone lens tissue evaporation ======
 {{gallery>:mcmaster:contamination:cleaning_enc28:03_post_acetone_lens.jpg}}
+Then tried doing a standard lens clean with acetone + lens tissue
+dropped it onto the metal stage below, but it landed right side up and so I don't think this contributed to any contamination
+About the same, one particle appeared and one dissapeared or so
 ====== Step 4: acetone syringe ======
 {{gallery>:mcmaster:contamination:cleaning_enc28:04_syringe_acetone.jpg}}
+did not help, same particles are there
 ====== Step 5: acetone lens tissue wipe ======
 {{gallery>:mcmaster:contamination:cleaning_enc28:05_wipe_acetone.jpg}}
+Looks like there is still a lot of contamination but its not in the same place
 ====== Step 6: acetone syringe ======
 {{gallery>:mcmaster:contamination:cleaning_enc28:06_syringe_acetone.jpg}}
+Used new fixture to hold sample
+Much cleaner
+Expect that remaining particulate is mostly lose
 ====== Step 7: acetone shake ======
 {{gallery>:mcmaster:contamination:cleaning_enc28:07_acetone_shake.jpg}}
+Looks exactly the same after
+Conclusion: stuff is still stuck on
 ====== Step 8: acetone lens tissue wipe ======
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 {{gallery>:mcmaster:contamination:cleaning_enc28:10_sonic_acetone.jpg}}
-====== Step 10: acetone lens tissue wipe ======
+====== Step 11: acetone lens tissue wipe ======
 {{gallery>:mcmaster:contamination:cleaning_enc28:11_wipe.jpg}}
@@ Line 54: / Line 83: @@
 {{gallery>:mcmaster:contamination:cleaning_enc28:probe_points_50x_1.jpg}}
+====== Conclusions ======
+Ultrasound was more effective at removing large particulates than high pressure acetone.
+Ultrasound does not effectively remove undissolved epoxy but it can be removed by wiping
+Tearing lens tissue for smaller allotments is a bad idea as it generated particulates.  The sheet should be used whole and moved around if it is to be used multiple times.