Principles & Protocols

Protocols - Using Carbon Rod in Edwards 306

THIS PROTOCOL IS FOR PURE CARBON IF USING GRAPHITE DO NOT APPLY AS MUCH JUICE

How to tell the difference: Graphite can be written with carbon cannot

Insert fresh carbon rod in carbon evaporator source
Attach carbon evaporator source to rod A&C and grounded rod 14cm from grid
Move stop over sample to prevent C from coating during off gassing
Lower bell jar
Close safety latch on bell jar
Push "cycle" wait for bell jar to pump down to 10-4
Turn dial to #0 (L)
Switch LT selector to A (10V)
Switch on LT
Turn the selector up to # 4 to off gas contamination slowly
Move sample stop away from sample
Make sure variable control is at 0
Add liquid nitrogen to the LN2 trap
Allow vacuum to recover to 5x10-6 - may need to be restarted
Turn variable switch slowly until a glow is present
Hold for 30 seconds to condition carbon tip
Turn up variable control slowly to around #6, if sparks are seen back down on the power
Coat to desire thickness
Turn down variable control
Turn selector switch to "0"
Press "vent"

-- DavidStokes - 18 Mar 2005