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equipment:zeiss-dsm-962:log [2026/07/04 16:26] – style rahixequipment:zeiss-dsm-962:log [2026/07/18 19:13] (current) – [Day 2026-07-16] rahix
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 ====== Lab Log for the Zeiss DSM "Kevin" ====== ====== Lab Log for the Zeiss DSM "Kevin" ======
  
 +> //This page is a lab notebook. It documents the work done in the lab and our thoughts, theories, and findings related to it. Everything you read here is work in progress and not final results. We believe it is best to have our lab notes out in the open, because it gives more detailed insight into what worked for us and what didn't. Of course you can also use this page to follow our progress!//
 +
 +==== Day 2026-07-18 (q3k, rahix) ====
 +For reference, this is the current sample configuration in the SEM:
 +
 +{{:equipment:zeiss-dsm-962:2026-07-18_sample-stubs.png?600|}}
 +
 +==== Day 2026-07-16 (q3k, guest) ====
 +Finally replaced the o-ring. In the process, the interlock switch for the top of the column broke. It is jumpered out for now.
 +
 +  * Original switch: [[https://eu.mouser.com/en/ProductDetail/Honeywell/3SX1-T?qs=10P5Hhl%252BD7%2Fotd6%2FZifFJA%3D%3D|Honeywell 3SX1-T]]
 +  * Possible replacement: [[https://www.tme.eu/pl/details/j-7/mikroprzelaczniki-snap-action/omron-electronic-components/|OMRON J-7]]
 +
 +==== Day 2026-07-11 (q3k, rahix) ====
 +Started work on designing a proper enclosure for the OBI.
 +==== Day 2026-07-10 (q3k) ====
 +Continued work on the OBI. Here's a picture acquired through it:
 +
 +{{:equipment:zeiss-dsm-962:2026-07-10-obi-acquisition.png?600|}}
 +
 +==== Day 2026-07-08 (q3k, hugo) ====
 +New tool worked to get the locknut out. O-ring indeed got destroyed; ordered replacements (it's a 6×2mm). In the meantime, sealed it up again and while not pumping down great, we can still get a good enough vacuum for imaging.
 +
 +Installed the beam blanker:
 +
 +{{:equipment:zeiss-dsm-962:2026-07-11_20-06-beam-blanker.png?600|}}
 +
 +It has an SMC connector, will need to get an appropriate cable.
 +
 +==== Day 2026-07-05 (rahix, rob) ====
 +
 +Next attempt at removing the lock nut that's hiding the broken o-ring.
 +
 +During opening of the gun head, we found a washer beneath the liner tube.  It is wrapped inside the aluminum foil labelled //Anode//, next to the anode head.
 +
 +The first iteration of the 3d-printed tool broke, the lock nut is on there really tight.
 +
 +Redesigned the locknut tool to hopefully take more torque.  Printed the new tool, but didn't get to use it yet.  The model is in ''misc/sem-anode-lock-ring-tool.FCStd''. It is designed to take two M2x16 screws for engaging the lock nut.
 +
 +{{:equipment:zeiss-dsm-962:locknut-tool.png?200|}}
 +
 +Roughly reassembled the column (anode head, liner tube, and the washer are still outside). Pulled a rough vacuum to not leave the system under atmosphere.
 ==== Day 2026-07-03 (q3k, hugo) ==== ==== Day 2026-07-03 (q3k, hugo) ====
  
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 {{:equipment:zeiss-dsm-962:anode-head-realignment.png?direct&400|}} {{:equipment:zeiss-dsm-962:anode-head-realignment.png?direct&400|}}
 +
 +[Documentation p. 174, 6.2 02-3 3]
  
 This required disassembling the anode head - removing it from the column, which also meant removing the cathode head with its hinge, removing the cathode head interlock switch (soldered on) and disconnecting the beam aligner connector inside the column. This required disassembling the anode head - removing it from the column, which also meant removing the cathode head with its hinge, removing the cathode head interlock switch (soldered on) and disconnecting the beam aligner connector inside the column.