Search found 304 matches

by Roberto Ferrari
Thu Mar 25, 2021 10:01 pm
Forum: Vacuum Technology (& FAQs)
Topic: Can somebody check my calculations?
Replies: 6
Views: 1220

Re: Can somebody check my calculations?

Hi Maciek

Sorry not being of more help.
Surely you could submit your doubt to physicsforums.com

Best
Roberto
by Roberto Ferrari
Sat Mar 20, 2021 9:21 pm
Forum: Vacuum Technology (& FAQs)
Topic: Can somebody check my calculations?
Replies: 6
Views: 1220

Re: Can somebody check my calculations?

Hi Maciek

I agree with your analysis until the last but one statement.
Seems there is a factor wrongly applied.
Are you writing 15.000 l/s? (sorry Americans, we both use the dot for the thousands and the comma for the decimals).
I got 1,59 l/s, the delta pressure is 10-3.
by Roberto Ferrari
Sat Mar 20, 2021 7:36 pm
Forum: Vacuum Technology (& FAQs)
Topic: Can somebody check my calculations?
Replies: 6
Views: 1220

Re: Can somebody check my calculations?

Maciek
Why the document is dated March 23th?
What is the spectrometer volume?
You say the system is differentially pumped but you don´t show were are the pumps located.
You jump from conductance to volumetric flow.
What is the throughput of the pump?
Where the H2 comes from?
Roberto
by Roberto Ferrari
Tue Mar 02, 2021 11:12 pm
Forum: Vacuum Technology (& FAQs)
Topic: info about TPH-050
Replies: 7
Views: 1579

Re: info about TPH-050

Hi Ameen

Thanks a lot, I already got a stock.
Roberto
by Roberto Ferrari
Fri Feb 19, 2021 12:37 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Titanium Coated Endcaps for the Cube Fusor
Replies: 20
Views: 2950

Re: Titanium Coated Endcaps for the Cube Fusor

Jim and Jon,

Understood, thanks.
Roberto
by Roberto Ferrari
Thu Feb 18, 2021 8:45 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Titanium Coated Endcaps for the Cube Fusor
Replies: 20
Views: 2950

Re: Titanium Coated Endcaps for the Cube Fusor

Jon, Jim, Richard
Thanks for your comments.
Being unable to assembly a PVD, what about heating a titanium wire in a high vacuum, as in sublimation pumps?
Some will condense in an adecuately positioned piece.
Am I wrong?
by Roberto Ferrari
Wed Feb 17, 2021 11:26 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Titanium Coated Endcaps for the Cube Fusor
Replies: 20
Views: 2950

Re: Titanium Coated Endcaps for the Cube Fusor

Jon
A superb setup, as always.

But help me to understand. Wasn´t enough to use a titanium sheet?

Roberto
by Roberto Ferrari
Thu Feb 11, 2021 9:16 pm
Forum: Vacuum Technology (& FAQs)
Topic: info about TPH-050
Replies: 7
Views: 1579

info about TPH-050

I have the following questions about the Pfeiffer TPH-050 turbomolecular pump:
-where to get the lubricating oil, or a replacement one.
-the resistances of the motor windings.
-the motor windings pin-out.
Thanks in advance.
Roberto
by Roberto Ferrari
Fri Apr 03, 2020 2:33 pm
Forum: Books & References
Topic: Experimental techniques
Replies: 0
Views: 2723

Experimental techniques

I wish to call your attention to a nice bibliography on experimental techniques, not all but many ones useful for fusor experimenters:

Experimental Innovations in Surface Science, by John T. Yates Jr.

The title is slightly misleading but the content is invaluable.