View source for Stereoscan

[[Category:Stereoscan]]
HacDC is in the process of refurbishing a scanning electron microscope: a Cambridge Stereoscan 200.

[[File:SEM_install_1_thumb.jpg|right|SEM in workshop]]

=Current Status=

March 31st: Cleaned the plinth and took photographs of the vacuum components. [https://dl.dropboxusercontent.com/u/45972/sem/sem_cleaning/index.html Available here]. -Dan K.

* <strike>Oil diffusion</strike>Turbo molecular pump was hanging due to the lip falling out of the rubber suspension. Could be cleaned and probably popped back in.

* Broken switch on roughing pump was bypassed internally. Plugging in the outlet should activate the pump. (This pump normally runs 24/7 when the machine is operational.)

* Compressed air needed to get more dust out

March 30th: Moving complete! The SEM is now in the workshop

March 29th: Awaiting pick-up and installation (March 29th and 30th).

March 23rd: A space in the workshop has been cleared. Photo: http://i.imgur.com/BDNWL5z.jpg

=Maintenance Information=

Maintenance and repair logs will be kept on an ongoing basis. For previous status and repairs, see: 

# http://757labs.org/2012/09/scanning-electron-microscope-update/ ([http://pastebin.com/hSiu4Urs archival link -- text only])

# http://757labs.org/wiki/Projects/SEM ([http://pastebin.com/vWPj8eHu archival link -- text only])

=Useful information=

* [http://i.imgur.com/rMErvPd.png Stereoscan 200 dimensions]

* [https://dl.dropboxusercontent.com/u/45972/sem/s200.zip S200 operating instructions (2 MB zip)]

=Resources=

* The original S200 operating instructions will be available at the space in a three-ring binder near the machine. 

* If possible, members will also have access to a PDF copy of ''Scanning Electron Microscopy - A Student's Handbook'', 1980, self-published by Michael Postek, et al. This book was widely used by microscopists and is still regarded as a good learning reference, but the original binding is rare and prone to falling apart. It might be possible to use the PDF copy for private, educational use.

* SPI supplies: http://www.2spi.com

* O-ring supplier: [http://www.parker.com/portal/site/PARKER/menuitem.7100150cebe5bbc2d6806710237ad1ca/?vgnextoid=f5c9b5bbec622110VgnVCM10000032a71dacRCRD&vgnextfmt=default&vgnextcatid=7394760&vgnextcat=O-RING%20PRODUCTS%20-%20NORTH%20AMERICA&Wtky=O-RINGS http://www.parker.com]

=Contacts=

We'll have a list here of HacDC members who are responsible for the SEM, including people that should be notified about problems.


=Supplies wishlist=

* Apiezon M vacuum grease for "O" rings, to be used for vacuum seals at room temperature: http://www.2spi.com/catalog/vac/apiezon/apiezon-m.php ($70 for 25g). Edit: page 058 of the manual states "The use of O ring grease is not recommended on any O rings, but a small amount may be used, if necessary, on moving seals e.g. the specimen stage and apereture changer micrometers."
** 31Mar2014 - there's a syringe of Ap. T grease in the space (~2g).  It's on top of the SEM's chamber atm.

* Replacement "O" ring for chamber->gun vacuum tube, for the chamber-side mounting adapter. (Will this work?  http://www.grainger.com/product/O-Ring-1RHY8)

=More Photos=

* http://imgur.com/a/uR7Yv#0

* https://dl.dropboxusercontent.com/u/45972/sem/sem_install/index.html