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Re: Neutron Scintillation Detector: start up work

Thanks Richard! Since my fusor puts out at least 3*10^4 neutrons/sec and I suspect a good bit higher I would hope that is enough; so, ... shocked by that ability.) But that system is solely used as a radiation safety detector system.)
by Dennis P Brown
Mon May 22, 2017 10:39 am
 
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Neutron Scintillation Detector: start up work
Replies: 12
Views: 1017

Re: How would you go about stepping up dc power supply volta

... to provide the required power that a fusor requires for detectable neutrons (std 60 Hz will not work for that level of power.) Getting diodes ... remember, when you open the supply in that manner you are on your own - safety is a very important issue and when the system is at a higher voltage ...
by Dennis P Brown
Tue Apr 18, 2017 10:56 am
 
Forum: New User Chat Area
Topic: How would you go about stepping up dc power supply voltage?
Replies: 17
Views: 1068

Re: John Beutz Fusor... The Story so Far

... if your system design leads to constant leaks, you will not progress to neutrons anyway. You are also running other critical systems in parallel ... before ever applying voltage to that 100 kV x-former; first, for safety reasons but also, if you burn out that x-former, or design/install ...
by Dennis P Brown
Sun Mar 19, 2017 6:10 pm
 
Forum: Images du Jour
Topic: John Beutz Fusor... The Story so Far
Replies: 24
Views: 2160

FAQ - Voltage-Cross section-Current

... will require significant electrical or electronics skills. High voltage safety becomes of paramount importance to avoid being killed or injured when ... Neutrons detection This subject is dealt with extensively in the FAQs on ...
by Richard Hull
Mon Mar 06, 2017 4:06 pm
 
Forum: FAQs: Fusion and Fusor Theory
Topic: FAQ - Voltage-Cross section-Current
Replies: 1
Views: 862

Re: First Colorado Design Sequence

... just Alpha's - and as I mentioned, a Be/Am system will produce too few neutrons to be much of a safety hazard.
by Dennis P Brown
Mon Feb 06, 2017 12:39 pm
 
Forum: New User Chat Area
Topic: First Colorado Design Sequence
Replies: 5
Views: 573

Re: Neutron Transmutation Doping

... broad, and generally depends on qualifiers (often implicit). Tables in safety standards give, for neutrons at 2.5e-8 Mev, a Q factor of 2 and a neutron to rem factor of 980 million. So the ...
by Rich Feldman
Tue Oct 18, 2016 2:16 pm
 
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Neutron Transmutation Doping
Replies: 15
Views: 1632

Re: Water as Neutron Shield

... number one hazard I see with a fusor or a sim-fusor. Also, exactly what safety regulations are there for the average home fusor? Are you serious ... because it can burn (talk about safety risk; lol.) Relative to stopping neutrons paraffin is excellent and readily available to the average home ...
by Dennis P Brown
Fri Jul 29, 2016 9:51 am
 
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Water as Neutron Shield
Replies: 17
Views: 3288

Re: safety and sercurity

... measure microns accurately.) This ignores detection equipment for the neutrons. This should answer the question about safety ... read the various FAQ's on the given topics here at the forum. Please don't ask questions ...
by Dennis P Brown
Fri Jul 15, 2016 2:58 pm
 
Forum: New User Chat Area
Topic: safety and sercurity
Replies: 2
Views: 1062

Re: Mark3 operation 3e-4 torr / quad ion source @ -40kV, 1mA

Runs are kept short for safety(and thermal issues) x-ray rate at the viewport surface is 10-15mR/h through the ... enough to get good counting statistics from the BTI dosimeter, so about 2-3mR of neutrons at the surface of the fusor(~3.5" from focal point) per run. I'm usually ...
by Andrew Seltzman
Mon Jul 11, 2016 3:37 am
 
Forum: Fusor Construction & Operation (& FAQs)
Topic: Mark3 operation 3e-4 torr / quad ion source @ -40kV, 1mA-9mA
Replies: 130
Views: 21344

FAQ - A neutron moderator for activation/detection

... but worked OK. This works much better. All D-D fusion produces fast neutrons which can't do much of anything for the experimenter. Valuable neutrons ... metallic object close to 45,000 volts. These insulating rods are a safety factor. You could design this to go under the fusor, leaving room ...
by Richard Hull
Mon May 09, 2016 6:28 am
 
Forum: FAQs: Neutron - Radiation Detection
Topic: FAQ - A neutron moderator for activation/detection
Replies: 3
Views: 1503
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