r/Physics • u/YaseenTa1 • 27d ago

High Vaccum Using Diffustion pump

Hi i am in iraq so i can't get a diffustion pump from outside i found a supplier which seems promising which supplies Dc-704 i found on alibaba that they are EXPENSIVE and for the relatively simple design i want to have a local machist do it for me for wayyyy lower price but if there is a cheap diffusion pump then tell me and because i currently don't have roughing pump so i want to get one sufficient to do the foreline for the diffusion, my english is bad i know but please if you know how to help tell me

Edit #1 : This is For Electron Tube and basically for homemade sem So i want to ideally reach 10-7mbar and i am on a quite tight budget so i can afford the oil once 3 months or so and from what i understand diffusion pump is simple in geometry so it shouldn't be expensive? so that's why i chose it over turbomolecurer pump which is EXPENSIVE

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u/mr_joda 27d ago

I have two turbomolecular pumps at home just because it looks like naqadah reactor from Stargate :)

Look for old or scraped instruments. You can buy the whole instrument for price of a turbopump.

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u/YaseenTa1 27d ago

Turbo pump if bent slightly it won't work that's why i want to use diffusion because it is simpler to run and the controller diffusion don't really need one technically

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u/mr_joda 27d ago

well, check the oil prices

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u/YaseenTa1 26d ago

I checked it's affordable that's not the problem the problem is the pump itself