Hello,
I'm looking for Kapton windows, which could resist to low vacuum conditions (ie 0.1 mbar) if possible in Europe, so I'm sending an SOS bottle here ; links, name of potential providers... I take anything
Thanks for reading
Florent,
By 'vacuum-proof', do you mean that you want a window that can sustain a 1bar pressure difference, or simply a window that outgasses very little and is to have a hard vacuum on both sides of it?
The first option will be very difficult. May I ask why you need the window to be made of Kapton?
The second option is easier, for small windows of a few cm diameter. I would fabricate a con-flat-like flange, using a PTFE O ring in compression.
What is the desired operating temperature?
@James Garry
thank you for your answer ; in fact I mean the first one. A window on Kapton mechanically resistant enough for handling ambient pressure on one side and 0.1 mbar on the other
I tagged properly my post but an editor went to mess up ; It's meant for Xray
Florent,
Well, it seems that a con-flat clamping arrangement is not unknown.
http://hasyweb.desy.de/science/annual_reports/2006_report/part1/contrib/49/18213.pdf
I would be inclined to examine an engineering polymer, such as Delrin, to determine whether such a material could be used instead (absorption coefficient, etc). Far easier than fabricating a thin film window.
Thank you ; I saw that too
I'm indeed asking to the scientific community -especially X-ray engineers and polymer ones- if they know companies -located in Europe preferentially- which are making turnkey or taylor made flanges with Kapton
Of course my ultimate solution is to buy Kapton films, encapsulate it in a flange -as you said with a ptfe oring we already have- and go for it under vacuum Before that I prefer a more tangible solution
I would recommend http://www.goodfellow.com/.
We have ordered our Kapton there, they have a quite wide range of different types (thickness, coated etc.) depending on your application
Delivery time is sometimes a hassle, but if you're lucky, you can get within 2-3 days.
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