As far as I understand, you mean the 4 big bolts on the outside of the source manifold. If so, I don't think they have to be stainless steel.
It's important that they are able to push the source flange with enough power to the housing so that the necessary vakuum can be achieved.
Department of Environmental Sciences
Institute of Biogeochemistry & Pollutant Dynamics (IBP)
ETH-Zentrum, CHN, Office G14
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From: Stable Isotope Geochemistry [mailto:[log in to unmask]] On Behalf Of Charlotte Lehmann
Sent: Mittwoch, 29. August 2007 17:39
To: [log in to unmask]
Subject: [ISOGEOCHEM] Delta V ion source attachment screw
We have a Delta V. I needed to replace the filament and I am not having a lot of luck with the aluminum threads in the ion source housing this week. I have managed to strip one each on two separate occasions. Our soon to depart Physics Dept. Machinist has been able to tap out the holes and adjust the opening in the claws and washers to accept a non-SS 3/8" bolt shortened to the length of the original SS 8 mm bolt.
My question is this: do these bolts which clamp the source into the aluminum housing need to be Stainless Steel?
If so, I'll have to order some ASAP, since the machinist leaves the end of this week and I don't know when his replacement will be hired.
The sooner I hear from anyone on the list who knows with certainty, the sooner I can get these bolts, if necessary.
Thanks in advance.
Assistant in Instruction
Department of Geology
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