XeonTheMGPony
International Hazard
Posts: 1640
Registered: 5-1-2016
Member Is Offline
Mood: No Mood
|
|
Ultra high vacuum
Most ultra high vacuum systems require a turbo molecular pump or a vapor diffusion pump.
Now I have worked with the latter, and they can be messy as now days they use oil instead of Mercury and they require heating and such, and the other
fun point is vapor can some times go on a trip and slowly coats the chamber if your baffling isn't well set up.
I was wondering, based off ion engines why not use an electrical field to accelerate remaining gas molecules to the rotary vane pump?
https://en.wikipedia.org/wiki/Electrostatic_fluid_accelerato... < Concept
No oil or moving parts, silent operation (Moot point I guess giving the rotary vane pump will be making noise)
So my question is: Am I missing any thing glaringly obvious that would render this idea non functional?
For those curious my old now stolen system used a 56L stainless steel keg as the chamber and a small refrigeration system as the water trap the
evaporator was built inside a pressure cooker packed with Stainless steel wool scrubbers then to the diffusion pump then rotary vane pump (2stage)
Gauges where ion gauges and thermister digital.
Basically I plan to just carbon copy my old design but if possible get rid of the diffusion pump and try my linear direct current accelerator pump
idea.
Possible fabrication styles and means of functioning:
http://www.thomastownsendbrown.com/hydro/images/pump5.jpg
http://www.ee.washington.edu/research/seal/projects/EFAproje...
[Edited on 20-8-2016 by XeonTheMGPony]
[Edited on 20-8-2016 by XeonTheMGPony]
[Edited on 20-8-2016 by XeonTheMGPony]
|
|
|
unionised
International Hazard
Posts: 5126
Registered: 1-11-2003
Location: UK
Member Is Online
Mood: No Mood
|
|
Like this?
https://en.wikipedia.org/wiki/Ion_pump_(physics)
|
|
|
XeonTheMGPony
International Hazard
Posts: 1640
Registered: 5-1-2016
Member Is Offline
Mood: No Mood
|
|
Similar but rather then capturing, compressing, basically replacing the use of the turbo or vapor diffusion pumps.
But I'll give that a more thorough read.
But it is seeming more and more the idea is worth while to make a prototype for!
|
|
|
careysub
International Hazard
Posts: 1339
Registered: 4-8-2014
Location: Coastal Sage Scrub Biome
Member Is Offline
Mood: Lowest quantum state
|
|
There is this:
Attachment: basu2015.pdf (1.6MB)
This file has been downloaded 566 times
|
|
|
yobbo II
National Hazard
Posts: 762
Registered: 28-3-2016
Member Is Offline
Mood: No Mood
|
|
What is your opinion of this vacuum gauge.
Thanks
http://www.ebay.co.uk/itm/Old-ROBINAIR-Thermistor-Vacuum-Gau...
|
|
|
XeonTheMGPony
International Hazard
Posts: 1640
Registered: 5-1-2016
Member Is Offline
Mood: No Mood
|
|
Pretty old but looks like a good one Robin air tends to be good quality, can't go wrong for the price.
The heads are a consumable though, so it may need to be replaced, but if it is reading eradic clean with pure isopropyle alcohol first as oil will sod
up the readings if it gets on the thermister.
|
|
|
unionised
International Hazard
Posts: 5126
Registered: 1-11-2003
Location: UK
Member Is Online
Mood: No Mood
|
|
It won't measure down to anything like UHV.
You may not be able to obtain spare measuring heads for it.
It will probably need calibrating.
|
|
|
Texium
|
Thread Moved
27-11-2023 at 10:51 |
![[*]](images/xpblue/default_icon.gif){kind=icon}
