Search found 110 matches

by Bruce Meagher
Wed Dec 05, 2018 6:42 am
Forum: Advanced Technical Discussion Area
Topic: A theoretical discussion based on data re. fusor conditioning fusion
Replies: 6
Views: 1440

Re: A theoretical discussion based on data re. fusor conditioning fusion

Richard, A few additional details of what’s involved in your daily set of runs would be useful. How many are done, and how long is each run? Do you believe it’s just a matter of a particular amount of running time with D2, or do you believe shutting down the system and cool everything plays a part i...
by Bruce Meagher
Wed Dec 05, 2018 6:21 am
Forum: Announcements and Site Administration Topics
Topic: Finished PhD, now a postdoc at MIT
Replies: 8
Views: 738

Re: Finished PhD, now a postdoc at MIT

Congratulations Dr. Seltzman! If you come to San Diego contact me if you’re interested in joining several of us fusor members for one of our meetups.
by Bruce Meagher
Wed Dec 05, 2018 5:51 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Please Help Quantify X-Rays
Replies: 8
Views: 456

Re: Please Help Quantify X-Rays

My understanding is no MeV X-rays will be produced by heavy energetic charged particles (proton, triton, or He3 particles). Heavy charged particles don’t emit measurable bremsstrahlung radiation when slowing down in the stainless steel shell. Lots of characteristic X-rays from the iron and other ele...
by Bruce Meagher
Tue Dec 04, 2018 12:23 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Please Help Quantify X-Rays
Replies: 8
Views: 456

Re: Please Help Quantify X-Rays

To get the expected X-ray exposure rate of your fusor you might consider running a Monto Carlo radiation transport simulation with programs such as GEANT4, Gate, MCNP, etc. These programs have fairly steep learning curves, but should provide the results you’re after. Another method would be to hand ...
by Bruce Meagher
Tue Jul 10, 2018 5:12 am
Forum: Vacuum Technology (& FAQs)
Topic: MKS 901p
Replies: 55
Views: 9209

Re: MKS 901p

Rich, try BR? not BD? to get the baud rate.
by Bruce Meagher
Fri Jun 22, 2018 6:15 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Nuclear Enterprises plastic scintillators
Replies: 2
Views: 1289

Re: Nuclear Enterprises plastic scintillators

Saint-Gobain acquired Nuclear Enterprises in the 90s. You might try contacting them to see if you can get the specs. These could be the same as the BC 400 series scintillators they currently offer.

Bruce
by Bruce Meagher
Wed Jun 06, 2018 8:23 pm
Forum: Images du Jour
Topic: Gold Plasma
Replies: 7
Views: 1553

Re: Gold Plasma

Great suggestions Rich. Two experiments to add to the list.

Bruce
by Bruce Meagher
Mon Jun 04, 2018 2:53 pm
Forum: Images du Jour
Topic: Gold Plasma
Replies: 7
Views: 1553

Re: Gold Plasma

The machine is a small gold sputter coater. Turning pure silver coins into gold... now that's just straight up good magic.
by Bruce Meagher
Fri May 25, 2018 11:05 pm
Forum: Vacuum Technology (& FAQs)
Topic: Reverse engineering the Instrutech IGM-400
Replies: 8
Views: 2488

Re: Reverse engineering the Instrutech IGM-400

I can confirm all three of mine only have one filament. They measured approximately 0.14Ω. I couldn't get a good picture of the inside without destroying one so I cannot tell if these are yttria coated iridium or tungsten filaments. However, looking at the numbering IMG402YBX seems to indicate yttri...
by Bruce Meagher
Thu May 24, 2018 10:42 pm
Forum: Vacuum Technology (& FAQs)
Topic: Reverse engineering the Instrutech IGM-400
Replies: 8
Views: 2488

Re: Reverse engineering the Instrutech IGM-400

I ordered three of these gauges. One works as Lukas describes but the other two failed. I need to replace the electrolytic capacitors to see if this is the issue. The pressure output on the working gauge matched my Inficon gauge closely. The voltages are different in the picture below because the tw...