Search found 306 matches

by Roberto Ferrari
Thu Jul 19, 2018 1:53 pm
Forum: Please Introduce Yourself
Topic: Hello from the Bay Area in California
Replies: 2
Views: 101

Re: Hello from the Bay Area in California

Welcome Alex! Diffusion pumps mostly go dead by a open heater, easily replaceable. Some brands use a glass window to monitor oil level and may go cracked. I used to recover them grinding out the small flange that holds the glass and sealing the hole with a TIG welded plate and back to work. Good luc...
by Roberto Ferrari
Wed Jul 18, 2018 8:38 pm
Forum: Images du Jour
Topic: Tubbs Beam-on-Target Effort [Neuts/Pics/Tips]
Replies: 47
Views: 10811

Re: Tubbs Beam-on-Target Effort [Neuts/Pics/Tips]

Hi Robert,
Please, comment about the RF power on your Ion Source Inductively Coupled as well as the Proton/Deuteron current.
Could you provide some diagram of your source? I am curious about the three extractors electrodes.
Thanks!
Roberto
by Roberto Ferrari
Wed Jul 11, 2018 5:25 pm
Forum: New User Chat Area
Topic: Pre-Testing a Vacuum Diffusion Pump
Replies: 3
Views: 223

Re: Pre-Testing a Vacuum Diffusion Pump

After checking electric resistance as suggested Jack, look for right insertion of the heater; Check the flanges surfaces for no dents; Check for no leaks of the main vessel ( water filling it in case has no oil on it). Check water refrigeration circuit for no leaks or clogs and you are done. Good lu...
by Roberto Ferrari
Fri Jun 22, 2018 7:44 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Nuclear Enterprises plastic scintillators
Replies: 2
Views: 472

Re: Nuclear Enterprises plastic scintillators

Hi Bruce

Ah! valuable info. I will get in touch.
Thanks,
Roberto
by Roberto Ferrari
Thu Jun 21, 2018 10:23 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Ballast resistor construction
Replies: 11
Views: 898

Re: Ballast resistor construction

Hi Dan

Excellent design!
How far will you push it in terms of kV?
Roberto
by Roberto Ferrari
Mon Jun 18, 2018 2:06 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Nuclear Enterprises plastic scintillators
Replies: 2
Views: 472

Nuclear Enterprises plastic scintillators

Hi I have been able to get three plastic scintillators for neutron detection, the models NE-400, NE-402 and NE-404. Being obsolete there is no much useful info on the web. Just learned that the 402 has 92% B10 and that the 404 is sensitive to fast neutrons. I would appreciate if some fellow has full...
by Roberto Ferrari
Fri Jun 15, 2018 1:16 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: What about "Liquid Scintillation vs. Pancake GM"?
Replies: 5
Views: 699

Re: What about "Liquid Scintillation vs. Pancake GM"?

Thanks Rex and Richard,

Yes, may be a cumbersome approach.
Roberto
by Roberto Ferrari
Thu Jun 14, 2018 12:30 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: What about "Liquid Scintillation vs. Pancake GM"?
Replies: 5
Views: 699

Re: What about "Liquid Scintillation vs. Pancake GM"?

Hi Richard
I was recalling George Schmermund' experiments posted some years ago.
Nobody followed that line?
I understand it's not the easiest way but was curious.
Roberto
by Roberto Ferrari
Wed Jun 13, 2018 3:01 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: What about "Liquid Scintillation vs. Pancake GM"?
Replies: 5
Views: 699

What about "Liquid Scintillation vs. Pancake GM"?

Hi
What happened with this promising thread?
Nobody continued that approach?
Roberto
by Roberto Ferrari
Mon Jun 11, 2018 4:17 pm
Forum: Please Introduce Yourself
Topic: Introducing myself.
Replies: 3
Views: 804

Re: Introducing myself.

Thanks Richard for your kind words.
I am always willing to collaborate; teamwork is very stimulating.
Roberto