Search found 130 matches

by ChrisSmolinski
Thu May 08, 2003 12:04 pm
Forum: Ion Gun Design and Construction (& FAQs)
Topic: HV Electron gun?
Replies: 3
Views: 4167

HV Electron gun?

Does anyone know of a commercial source for a fairly HV electron gun (50 to 100 kV). Current doesn't need to be high, microamps would be fine.
by ChrisSmolinski
Thu May 08, 2003 11:44 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Interesting variation in background counts
Replies: 3
Views: 1515

Interesting variation in background counts

<r>Hopefully this isn't too far off topic, but with the recent discussion on background radiation, I thought I would share it:<br/> <br/> I am running several rad detectors in my basement. One of my GM-10s, two<br/> GM-45s (one with a fan/filter attachment, see<br/> <URL url="http://www.blackcatsyst...
by ChrisSmolinski
Wed May 07, 2003 11:50 am
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: SLAC experiment identifies new subatomic particle
Replies: 1
Views: 1611

SLAC experiment identifies new subatomic particle

<r>Another inmate is added to the subatomic zoo: <URL url="http://www.slac.stanford.edu/slac/media-info/20030428/">http://www.slac.stanford.edu/slac/media-info/20030428/</URL><br/> <br/> I found this quote from the SLAC director most illuminating: <br/> <br/> “The discovery of this new particle unde...
by ChrisSmolinski
Tue May 06, 2003 2:48 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Background counts
Replies: 14
Views: 3198

Re: Background counts

<t>I'm not sure that it is simple to estimate the error tolerance of background readings, because they are constantly changing. I see a 2:1 variation over the course of 24 hours in the long term trend (taking 5 minute averages and plotting them out). We're talking real long term variations, not stat...
by ChrisSmolinski
Fri Apr 25, 2003 7:25 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Background counts
Replies: 14
Views: 3198

Re: Background counts

<t>Richard,<br/> <br/> Have you tried placing a shield over the mica window to block alpha/beta, for a guesstimate of the gamma component?<br/> <br/> Also... I've been curious for a while about coming up with a crude calibration, or maybe relationship is a better word, between GM readings and radon ...
by ChrisSmolinski
Thu Apr 10, 2003 12:35 pm
Forum: Fusion --- Past, Present, and Future
Topic: Navy cold fusion program
Replies: 10
Views: 4766

Re: Navy cold fusion program

Can you suggest any good online resources for reading up on what is known/believed to be happening with CF? It's an area I've not thought highly of since the Pons/Fleshmann fiasco, but I'd like to look at it with an open mind.
by ChrisSmolinski
Wed Apr 09, 2003 12:07 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Weekend rad hunt
Replies: 3
Views: 1970

Re: Weekend rad hunt

<r>A very interesting article Richard, it brought back memories, I visited the Amelia County mine several (eight?) years ago, before I was into all things radioactive <E>;-)</E> As I recall I found out about the mine from the owner of the rock shop out on Midlothian Hwy a few miles west of Richmond....
by ChrisSmolinski
Tue Mar 18, 2003 1:16 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Sealing sources
Replies: 8
Views: 3222

Re: Sealing sources

<r>John Cuthbert wrote:<br/> > Are you sure about that?<br/> > once it reaches equilibrium it needs a quantity of daughter of the same activity as the parent radioisotope. (Same number of Bq of daughter formed as Bq of parent lost).<br/> > that means that the amount of the daughter has to be less th...
by ChrisSmolinski
Tue Mar 04, 2003 8:26 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Setting up a NaI(Ti) Detector & Source
Replies: 15
Views: 5934

Re: Setting up a NaI(Ti) Detector

Richard,

Thanks for the fabulous data, graph and description of what to see from Radium/daughters. Two questions - what was your run time, and what size detector did you use?
by ChrisSmolinski
Wed Feb 26, 2003 7:46 pm
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: The neutron as a particle - my thoughts
Replies: 24
Views: 7174

Re: The neutron as a particle - my thoughts

<t>Greg Rogers wrote:<br/> > Where do you think the extra mass is coming from in the neutron? A proton has mass 938.3 MeV electron .5 MeV neutron 939.6 MeV, so there is an extra .8 MeV in there somewhere. If you ware colliding electrons and protons, this means that if "fusion" occurs, it wont start ...