Where can I find affordable conductive paste for vacuum environments?

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Discussion Overview

The discussion revolves around finding affordable conductive paste suitable for use in vacuum environments, specifically for an accelerator application. Participants explore the requirements for conductivity, outgassing characteristics, and potential alternatives to paste.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant inquires about the specific application of the paste, asking whether it is for grounding or shielding.
  • Another participant clarifies that the paste will be applied to an electrode energized with RF, intended to smooth over joints in a segmented electrode for an RFQ linac.
  • Some participants express uncertainty about the suitability of paste, suggesting soldering as a potential alternative for joining the electrode pieces.
  • One participant proposes the idea of using a space-compatible conductive epoxy, noting that the choice depends on required conductivity and outgassing specifications relative to temperature.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the best approach, as there are competing views on the use of conductive paste versus soldering or epoxy. The discussion remains unresolved regarding the availability of suitable conductive pastes.

Contextual Notes

Limitations include uncertainty about the outgassing characteristics of copper and silver pastes, as well as the specific conductivity requirements for the application.

Strat-O
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For an accelerator application I need some paste that can conduct electricity decently, but will also not outgas under a vacuum and have a cost of under, say, $20 per gram. It doesn't matter if the paste solidifies or remains malleable.

I have thought of copper and silver paste but not sure about their outgassing characteristics.

Thanks!
 
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What is the paste being used for? Grounding? Shielding?
 
It will be applied to an electrode that is energized with RF. The purpose of the paste would be to smooth over the joint because the electrode will be made in pieces and runs the length of the accelerator as in an RFQ linac.
 
I'm not sure a paste is your best bet, and I don't know of any vacuum-compatible electrically conductive pastes. Have you considered soldering the joints?
 
Mech_Engineer said:
I'm not sure a paste is your best bet, and I don't know of any vacuum-compatible electrically conductive pastes. Have you considered soldering the joints?

No, but now that you mention it that seems blatantly obvious. Cheap too. Thanks!
 
You might also try and find a space compatible conductive epoxy. A lot depends on what conductivity you require and outgassing spec's .vs. temperature.
 

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