Page History

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We began by venting the beamline according to the MFX protocol (found in MFX diamond window swap tab) with an additional PRV package at the downstream right-angle valve (preferred one has mud dauber screen and filter). Once the beamline is split open there needs to be an active purge of clean, dry nitrogen on both ends and this would be the only way. Plenty of built packages are around. 

For external assessment:

1. Vent the beamline according to protocol (keeping in mind PRVs at the source and point of use, this will require a lot of nitrogen so plan ahead)
2. Open the slit apparatus at the motor flange
   1. The motor is screwed to the flange from screws internally, so you will open up the top cover exposing the brain then find long internal screws to remove the motor itself from the flange. After that you will remove the flange from the six screws holding it into place. The attached photo is what the flange looks like from the vacuum side with the special designed gasket removed to check for any of the interference that might have been occurring. No damage was assessed on our end, but there could be so check this area before proceeding to more drastic measures. 

Image Added

3. Next step after seeing no damage was to actually remove the slit from the beamline, at this point the downstream purge can be turned on (doesn't need to go on until there is a disconnection because when venting the upstream one reaches the end of the MFX beamline) 

Internal assessment:

1. Open up 6" portion of 0 degree adapter on beamline. We opened up the upstream side first and tied up the beam pipe to pull the slit forward. It is attached on the other side to a bellows welded to a chamber so we expanded the bellows and were able to work with more space to remove that 6" flange.
2. No physical interference was noted through the 6" flange hole, so we opened up the 8" flange portion of the 0 degree adapter to have a full view of the slits. Initial notes: identified a long gray rod and one screw in bottom of chamber, magnetic limit switch hitter was magnetized to a different portion of the chamber. The screw was the correct screw to mount the magnet was the one in the bottom of the chamber and the rod was identified as the rod that sits on top of the slit itself and was from the -y slit in the opposite chamber side.