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  • January 11, 2015 at 1:32 am in reply to: Time Adjusted to Local Time? #1176
    Craig
    Participant

    Thanks, Halon: I didn’t know that the graphs were on a GMT+2 standard –thought I was confused or the graph displays in error.

    Yes, I agree: just put everything on GMT/Universal Time.

    Craig

    January 5, 2015 at 7:56 pm in reply to: Right through the storm #1157
    Craig
    Participant

    Whoa: I see all the old stuff posted again –but maybe I was confused about accessing it earlier –but thanks(!) if you’ve since pasted it all back into our General forum, Radu.

    Craig

    January 4, 2015 at 6:33 pm in reply to: Right through the storm #1150
    Craig
    Participant

    It’s more like the DIY/experimental forum has been eliminated, along with its old posts (less chance of confusion that way), but I quite agree with your decision to maintain one forum instead of two. There haven’t been enough posts, so funneling it all into this forum seems more viable than isolating what comments we have.

    * I’d rather post new comments than spend time amending old stuff.

    * For what gets logged to the radiation map, my suggestion is that the emphasis be on standardization (detector, software, outside placement/siting, shelter) –relegating the DIY/experimental, home designed and cobbled to off-line efforts.

    January 3, 2015 at 10:54 pm in reply to: Right through the storm #1121
    Craig
    Participant

    Thanks, Radhoo. Let’s see if that snags more hits and members.

    By the way: are you aware that the DIY forum has evaporated?

    Craig

    December 19, 2014 at 6:00 pm in reply to: Right through the storm #1008
    Craig
    Participant

    Great photo, Radhoo –and thanks.

    * More than just Xray class radiation, lightning strikes produce brief but powerful “TGFs”: terrestrial gamma-ray flash. They’re relatively rare –fewer than 100 per day detectable by satellites. Less common are gamma ray surge build-ups preceding the lightning strike –per:
    > http://physicsworld.com/cws/article/news/2013/jul/10/japanese-team-sees-gamma-ray-pulse-before-lightning-flash

    ** I was unable to see this photo until I logged in. Members are consequently not likely to be linking their friends to your post –and you’d be missing an excellent opportunity for your web site to “go viral”. Pity. Please reconsider the log-in requirement policy.

    * However, to get around this policy, I’m linking to:
    > https://www.uradmonitor.com/wordpress/wp-content/uploads/2014/12/lightning-strike.jpg

    Craig

    December 16, 2014 at 6:09 pm in reply to: What the heck are we counting? #961
    Craig
    Participant

    Yes, Richard –plenty of muons up there –where they’re being made, as protons and what-not cosmic particles slam into the upper atmosphere, but also neutrons and consequent transmuted elements/isotopes. Quite a soup –per:

    > https://en.wikipedia.org/wiki/Cosmic_ray

    > http://www.spaceweather.com/archive.php?view=1&day=15&month=12&year=2014
    (and scroll down to “Sky Calculus”)

    But with so many particles and gamma/photonic rays bouncing around an airliner cabin, it’s debatable just what a Geiger counter is responding to.

    > https://www.youtube.com/watch?v=apWRH39Jgcc

    Craig

    December 15, 2014 at 7:15 am in reply to: What the heck are we counting? #952
    Craig
    Participant

    Thanks for your response/thoughts, Richard, and for your “vote” on this matter.

    I’ve yet to cast my own vote, due to conflicting data and sources.

    I also thought we had to be counting a lot of muons, then Robert Hart (of hardhack.or.au), who deliberately seeks muons (using coincidence counters) told me that Geiger Tubes are less efficient in detecting muons. That even though muons have quite a lot of energy and are heavier than an electron, they tend not to ionize efficiently —but that I should be wary of lead shielding, which might result in muons causing cascades beta, positron and gamma radiation.

    * An industry respected authority and leader of several radiation interest groups plus another guy who runs a Geiger counter company (they get pissed if I use names) have flatly stated that there’s little or no noise, just ionizing events from external sources –like muons –and that without the NORM, cosmic stuff, and secondaries from shielding, a good Geiger counter might read “zero”.

    * However, all G-M tube manufacturers plus two other top guys in the G-M/GC industry have told me that all G-M tubes made since the war have noise.

    ** Again: my 2 meter depth submerged readings were cut in half –suggesting that the radiation was coming from above (since I was out over the water), that since 2 meters of water stopped half of it, it’s not muons, and that even an SBM-20 G-M tube doesn’t have much noise.

    I did that test to verify similar results that a technician for a highly respected private network got (who asked not to be cited).

    Again: all this leaves me with a concern for the meaningfulness of our background monitoring, but without an opinion as to the source/s of our *clicks*.

    * Possibly: what we see of muons (with a Geiger counter) is just showers of secondary stuff, which does get stopped by a few feet of water.

    ** Any more votes from this group?

    December 14, 2014 at 8:07 pm in reply to: What the heck are we counting? #940
    Craig
    Participant

    I’ve taken the above link twice so far this morning, It works for me and I’m not aware of RadViews having gone down.

    Best I place a copy here –should others in Eastern Europe be having a problem.

    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    Here’s a question I sent to the RadWatch group at:
    > http://radwatch.berkeley.edu/FAQ

    12/13/2014

    Dear RadWatchers,

    Some while ago I used your utility on the FAQ page to submit a question. Although the “Captcha” indicated that I got the code right and that my question got submitted, there was no automatic email acknowledgement. Perhaps my question didn’t actually get through to you.

    So here it is again via email –or what I remember of it.

    ~~~~~~~~~~~~~~~~~~~~

    * Question: Is monitoring background “gamma” useful?

    (Or: the way I do it, as posted to:

    > http://radviews.com/map/
    –and click through that icon on the Oregon coast to see:
    > http://radviews.com/upload/14183636801565475242.gif )

    * Details (underlying my question):

    ~ Some say that even at sea level (MSL), about half of my count is muons. (Others say that muons hardly register on a standard Geiger counter.) With a high energy capable scintillator, the density runs about 1/cm^2/minute –which pencils out close to MSL background, given the profile of common G-M tubes.

    ~ G-M tube manufacturers’ specifications commonly cite –what I’d call a “noise level”, but what they call “own”, inherent, “self”, or “shielded” background levels that approach or exceed commonly logged MSL background radiation –per:

    > http://www.lndinc.com/products/17/
    (“Maximum background shielded 50mm Pb + 3mm Al (cpm) = 30 )

    > http://www.ebay.com/itm/New-High-Sensitivity-M4011-Geiger-Counter-Tube-/260835055100?hash=item3cbafb15fc&pt=LH_DefaultDomain_0#ht_928wt_862
    (“Own Background: 0,2 Pulses/s” = 12cpm )

    > http://www.gstube.com/data/2398/
    (“Inherent counter background (cps) = 1″ = 60cpm)

    ~ I weighted a sealed, Army type ammunition box with an SBM-20 G-M tube equipped Geiger counter inside and dropped it to a depth of 2 meters off the end of a dock. That cut the normal (40 inches off the ground) background level of 15cpm to about 7cpm (averaged over 20 minutes). That exercise suggests to me that, whatever it is I’m counting:

    > Half or more is coming from the sky.

    > Half or more is not muons, since 2m of water wouldn’t stop them. (Right?)

    ** So I’ll rephrase my question: Does my gamma monitoring (going on for 45 months now) have much to do with the “NORM” plus any on-the-ground radionuclides fallout –that I originally expected to be counting?

    Craig
    Craig Daniels
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    Attachments:

    1. stations.jpg

    December 10, 2014 at 7:16 pm in reply to: Introduce Yourself! #829
    Craig
    Participant

    Hello Urad Forum members, and thanks to Radu for this forum and network. I’m Craig Daniels, located very near the (USA) Oregon coast.

    I maintain a portable monitoring stations (for two beach locations) and a fixed outdoor station with a buried cable to it in an open area of our property.

    A dozen of us have been manually posting data to the RadView site:
    > http://radviews.com/map/
    –but I seem to be just talking to myself in their Forums.

    I previously posted automatically to “Radiation Network”:
    > http://www.radiationnetwork.com/
    –but I had to leave them when I gave up my expensive Internet service provider for a 3G/4G data capped plan instead.

    * Which means I can’t be posting data to the map here either, of course, but I can at least salute your fine efforts –and make suggestions from time to time.

    Craig

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