Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

LPF Donation via Stripe | LPF Donation - Other Methods

Links below open in new window

ArcticMyst Security by Avery

Game: Guess the mystery object !






ped

ped

0
Joined
Nov 25, 2008
Messages
4,889
Points
113
You got one Milli or do you want me to post one, I have a home made one.
 
Bluefan

Bluefan

0
Joined
Aug 15, 2009
Messages
1,443
Points
48
Mine was also home made, I have 3 turbopumps (2 unknown contition, 1 verified broken) and 0 controllers ;)

A turbomolecular vacuum pump is used after a roughing pump. Usually a two stage rotary vane vacuum pump goes to ~10^-3mbar after which the turbopump goes down to 10^-9 mbar in a good vacuum system.
It's basically some sort of turbine spinning at an insane speed, the smaller ones operate at 1khz, or 60000 rpm. At low pressures gas doesn't flow anymore, it's like playing pingpong with the particles which requires the high rotation speed.
Turbomolecular pump - Wikipedia, the free encyclopedia

Next!
 
Last edited:
ekeup

ekeup

0
Joined
Dec 2, 2011
Messages
93
Points
0
Mind if I take a turn posting?
(ignore the colored lines)

item.jpg
 
BShanahan14rulz

BShanahan14rulz

0
Joined
Dec 29, 2009
Messages
3,136
Points
63
Bluefan said:
At low pressures gas doesn't flow anymore, it's like playing pingpong with the particles which requires the high rotation speed.
Click to expand...

Wow, makes total sense, and yet it is still mind-boggling. Never would have thought about that! Thanks for sharing, Blue!

ekeup, is that an old computer of some kind? Forgot, it's been a while since I had computer history, is it a Pascal or Babbage machine?
 
Last edited:
You must log in or register to reply here.




Top