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Clagwell's Garage
United States
เข้าร่วมเมื่อ 26 มี.ค. 2006
Hobbies, Projects, and Reviews
HOW RADIOACTIVE IS IT?! Radium Wrist Watch
CPM Gamma assessment of a classic 65 year old radium wrist watch.
#radiation #radium #diy #science #nuclearscience #wristwatch
#radiation #radium #diy #science #nuclearscience #wristwatch
มุมมอง: 393
วีดีโอ
DIY Farnsworth Fusor Series: The Vacuum Chamber
มุมมอง 312หลายเดือนก่อน
This video outlines the assembly of a 2.75" Conflat vacuum chamber for a Farnsworth Fusor. #nuclearscience #science #fusor #fusion #experiment #nuclear
IMPOSSIBLE! Detecting Gamma Radiation with a Rock of Fluorite?!!
มุมมอง 466หลายเดือนก่อน
Will a common piece of Fluorite attached to a photomultiplier detect gamma radiation? Lets find out! #science #nuclearscience #electronics #fluorite #diyideas
RADIATION SHOWDOWN: Uranium and Cs137 vs Thick Lead Shielding
มุมมอง 380หลายเดือนก่อน
Does thick lead stop gamma radiation? Sequentially thicker layers of lead are tested against low level gamma radiation sources (Uranium ore and Cs137 test disc). #uranium #nuclearscience #radiationdetector #science #geigercounter
DIY FARNSWORTH FUSOR SERIES: From Vacuum Chamber to Neutron Production
มุมมอง 168หลายเดือนก่อน
In this video, we introduce our series on how a comparatively low-cost and easy-to-assemble Farnsworth fusor is constructed, covering everything from the vacuum chamber to neutron detection. This series will primarily focus on the typical assembly of the 2.75" Conflat arrangement. #FarnsworthFusor #DIYNuclearFusion #NeutronDetection #ScienceProjects #DIYEngineering #Fusor #NuclearScience #Nucle...
DOES IT WORK? Ancient Geiger Counter Meets Modern Scintillator
มุมมอง 135หลายเดือนก่อน
In this video we test a modern Bicron Gamma Scintillation detector with a Detectron DG-2 Geiger Counter from 1950. Will it work??
The BEST Gamma Radiation Detector!! / Scintillator vs Geiger Counter
มุมมอง 1292 หลายเดือนก่อน
This is a comparative showdown between the efficiencies of a Geiger Tube and a Gamma Scintillator NOTE: This is NOT a dose rate comparative demonstration. The sole purpose of the small digital meter placements was to indicate and serve as a control that was no additional source in the area skewing the timed count. As the small meters have different sized detection crystals it was decided to let...
The Best Radiation Detection Gun! Saphymo SPP2
มุมมอง 1402 หลายเดือนก่อน
The Saphymo SPP2 Gamma Scintillator is a design soley based off the 1950's Precision Radiation Instruments Model 111 and 111B. The SPP2 is a highly ruggedized version which uses common D Cell batteries and modern solid state circuitry. It remained in production from the 1970's until around 2019.
Photomultiplier Exposed to Light? Bad for Gamma Spectroscopy?? Lets Find Out!
มุมมอง 2592 หลายเดือนก่อน
Will a PMT or NaITi crystal exposed to high intensity light negatively affect amateur gamma spectroscopy results? We will find out!
CDV-700 Geiger Counter with a Gamma Scintillator
มุมมอง 1642 หลายเดือนก่อน
Can a gamma scintillation detector work with a classic Civil Defense CDV-700? #Bicron #science #nuclearscience #geigercounter
CDV-715 is NOT A GEIGER COUNTER / Don't be Scammed!
มุมมอง 2532 หลายเดือนก่อน
My rant on the CDV-715 and CDV-717. Contrary to what many eBay sellers are claiming, these are not Geiger Counters and are essentially useless except for being a piece of Cold War history. They cannot be used to test for radioactivity around the home or elsewhere.
What is the Best Classic Geiger Counter ???
มุมมอง 1592 หลายเดือนก่อน
Review of the Civil Defense CD-V700, Detectron DG-7, and the PRI Professional 107B Geiger Counters of the Uranium Boom and Cold War Era.
ARKSEN Spot Welder Modification for Small Shapes
มุมมอง 1622 หลายเดือนก่อน
Easy mod to enable your Harbor Freight 115v ARKSEN spot welder to accommodate small and irregular shapes.
Wilson Cloud Chamber NO DRY ICE or COLD TEMPS REQUIRED
มุมมอง 6912 หลายเดือนก่อน
Wilson Cloud Chamber NO DRY ICE or COLD TEMPS REQUIRED
111B Scintillator GETTING it to WORK !
มุมมอง 2082 หลายเดือนก่อน
111B Scintillator GETTING it to WORK !
The Geiger Counter with the CRAZY NAME
มุมมอง 1332 หลายเดือนก่อน
The Geiger Counter with the CRAZY NAME
The Famous RADIATION GUN / FALLOUT and STAR TREK
มุมมอง 7212 หลายเดือนก่อน
The Famous RADIATION GUN / FALLOUT and STAR TREK
Farnsworth Fusor: Moderator / No Moderator (First Version)
มุมมอง 2003 หลายเดือนก่อน
Farnsworth Fusor: Moderator / No Moderator (First Version)
NUCLEAR RADIATION Decade Scaler / Antique
มุมมอง 623 หลายเดือนก่อน
NUCLEAR RADIATION Decade Scaler / Antique
McPhar TC-33A Gamma Scintillator Demo
มุมมอง 1183 หลายเดือนก่อน
McPhar TC-33A Gamma Scintillator Demo
Fusion Run 15Oct19 Moderator/No Moderator
มุมมอง 423 หลายเดือนก่อน
Fusion Run 15Oct19 Moderator/No Moderator
I know, it's not a geiger counter, it has no Real geiger Müller tube,it has a ionization chamber instead.i got mine more for my collection of vintage test Equipment. This Thing Shows radiation only in high Levels, if it Shows something, you have to leave your town.
Cheer~~~the branch of science and technology concerned with atomic nuclei and nucleons, especially the exploitation of nuclear power.😊
Seen another info vid on these and the guy there claimed ideally you want both the 715 and the 700. He said he'd get the high range first though as it will tell you dangerous levels you shouldn't be in at all or even momentarily, whereas the 700 maxes out too low and it's more for determining long term exposure levels that may be harmful if you stayed in them. Is that inaccurate? What modern alternatives would you recommend?
Extremely interesting... fascinating, however sir: 1} What were the outgassing rates of the cured epoxy resin when subjected to UHV conditions, and how did these outgassed species interact with the plasma dynamics within the inertial electrostatic confinement chamber? 2} How did the dielectric constant and breakdown voltage of the epoxy resin affect the electric field distribution within the fusor, especially in proximity to the inner grid where ion acceleration occurs sir? 3} so...given the thermal conductivity coefficients of the epoxy resin, how were thermal gradients managed across the fusor assembly, and what impact did these gradients have on the mechanical stress distribution and potential vacuum seal integrity under continuous operational conditions? 4} What is the long-term chemical stability of the epoxy resin in the presence of reactive species generated within the chamber sir, such as ozone or nitrogen oxides, and how could this affect the polymer's molecular structure and its capability to maintain a hermetic vacuum seal? 5} What were the viscoelastic properties of the epoxy resin under varying temperature and pressure conditions encountered during fusor operation, and how did these properties influence the dimensional stability of the fusor components, particularly in relation to maintaining precise alignment of the electrode grids? Very beautiful work...I hold PhD electrical engineering & computational physics...
Nice! Too strong electromagnetic waves affected camera ! 👍🔥
Did you ever figure out the fault in the HV section? I'm having an identical issue on my unit, where it never goes past a few hundred volts and makes a sad buzzing noise
I'll like to have your Gmail
Weldon sir
That is super cool!!!
That's a classic, where did you find that? What's the serial number, 76-?
Please, I need you for business deal sir... Can I have your Gmail?
Wow This is amazing Please I'm your new follower, and I need your help, can i have your Gmail address?
Really interesting video. Before finding this video, I did similar tests on an old watch I had sitting in my watch-box beside my desk and found very similar results. Background radiation on my detector was around 0.08 microsieverts per hour and when in contact with the watch rose drastically to 2.8 millisieverts per hour - 35x the dose of background radiation, as opposed to your findings with your watch of 25x.
Can you estimate the age of manufacture based on the relative size of the gamma spectrum peaks for the radium?
That would be a neat application.
Please make the video on your custom flybacks construction please. Thanks
@@normellow In the works!
@@ClagwellsGarage thanks man ! You Rock !
@@ClagwellsGarage nice, you rock !
@@ClagwellsGarage Nice, you rock !
This was a neat demo. Really makes me wonder what it is that "wears out" about radium paint. Does the zinc or sulfur transform from the radiation to another element (that would suggest some neutron absorption, which I'm not aware of anything like that in the Ra decay chain? Google suggests the "crystal structure" is changed - but how? Why does crystal structure change affect the ability to react to radiation for luminescence? Why can it react to UV (but with poor persistence) but not radiation? Such a curious change.
Nice video, Getting extremely to even get lead here, banned at most hardware except for registered trade supply
I was told assemble conflat finger tight, put it on a roughing pump, finger tight again then crank till vacuum is where you want it, seen flanges done 4-5 times
If one is interested in a nice geiger counter, look into a GQ GMC-600+. It is capable of alpha, beta, gamma, and xray detection up to 0.425 rem/hr. Please note that because of its detection capabilities and range, it will cost you around $350. If you wanna go cheaper like $150, try the GMC-500+. It is a combination of the CDV-700 and 715 with a low and high level tube. However, this only maxes out at 4.25 rem/hr while the CDV-715 can handle up to 500 rem/hr. Just for reference, half an hour of exposure at 500 rem/hr results in a 50% chance of death after 14 days. A radioactive floor tile from home depot is going to be 3.3 million times less radioactive than what the 715 maxes out at.
Thanks, Lots of really good tips there . Hmm! Dunway not shipping to Australia. Bolts- I believe they are silver plated. But are they Stainless steel or carbon ? We can get stainless at the hardware at $5 AU a bolt JB weld -$15Au here VG gaskets - strangely the low oxygen copper 2.75 we can get here and are cheaper than the VG 2.75 set which doesn't ship anyway Looking forward to the other vids. By the way in one of the previous vids you did a run with a fore pump only and converted the Ludlum CPS to N/S . Its always confused mre how to calculate that . Im thinking its somehow related to possibly chamber size , voltage , grid or current ( possibly other constraints) do you have any advise or references etc. on that topic , much appreciated .
How... how did I get here?
Splendid presentation !!! Excellent information! Thank you so very much for taking the time document your research. I'd love to just sit down with you and listen to ALL of your vacuum experiences and rules of thumb, it sounds like you've had quite a few.
Pull a spectrum off it to evaluate the fwhm.
@@U235hexafluoridedude Totally in the works after I get new audio interface for the spectrometer setup.
Well howdy!
Another great video. Thanks!. I haven't used the Theremino software, but I assume you could store individual spectra, and then superimpose one with another. I'd like to see the pre-illumination spectra of the radium source perhaps as a blue trace, and then superimposed on that the post-illumination spectra of the radium in red so you could see a direct comparison of the locations, heights, and widths of the peaks. I would surmise they wouldn't be that different, but such a visual comparison would be helpful. Keep up the great work. -- Ken, WBØOCV
Great video! Did you try exposing the various fluorite crystals to ultraviolet light to see which ones, if any, fluoresce under UV? Fluorite is one of the more common fluorescent menerals collected by those who like fluorescent rocks. It would make sense that something that would fluoresce under UV might make a "better" scintillation detector, but we are talking vastly different energies from UV (fractions of a keV, perhaps up to 0.005 keV)) versus something like Co-60 (thousands of keV, specifically 1173 and 1332 keV). Thanks again for the great video. -- Ken
Wow. Never knew about that!
Cool! I didn't even know fluorite was used as a scintillator until a few days ago when the Angry Turtle gems guy did a short video on cutting some synthetic fluorite originally intended for just this purpose. May I suggest another experiment with it? Boil a cup of water and dip the fluorite end of the assembly (in a plastic bag or something to eliminate water ingress) into the water to see if you can just start to see the onset of thermoluminescence from the fluorite due to lattice defects and F-centers accumulated during its time exposed to ambient radiation underground.
excellent vid
2" lead is over 10x reduction for 6MeV & Cs-137 0.662MeV, so likely closer to 100x reduction for Cs-137
Is the lead pre- or post- nuclear weapons testing refined? You need pre-weapins testing refined lead to get background really low, but you dont need that for measuring actual x-ray (uranium) & gamma ray (Cs-137) sources.
Yup virgin lead is a hard to find commodity ❤
Very good illustration and educational, Mark. Thank you for doing this video work.
Looks professional. Watching with interest from one of the largest laser ICF systems to see what kind of n production rate you get 🫡
@@Muonium1 Thanks for the comment! This series will only outline the assembly of a 2.75” conflat system. The pictured system was assembled and ran about 4 years ago before transitioning to a higher output version. The 2.75” Fusor (pictured) was a surprisingly easy build and provided enough output to easily activate silver and indium foils.
Well done I'm your new follower And I'd be glad to get your Gmail address. Thanks😊❤
This will be an extraordinary and beneficial video series, thanks
thank you for this, now I know what to say to that market place seller if he/she answers: "sorry I have changed my mind" 2 715's for $50
Oh, this is going to be fun! I need to look for some of these.
You are correct on every point. I think some people want these because they see it sitting on the shelf in Sheldon and Leonard’s apartment on “The Big Bang Theory “ 😅
What's the transmitted bandwidth ?
@@321CatboxWA I wish I remembered! I built it in 2014.
It is crazy to think about.
Beawere about the meaning of counts and dose rate. You can not compare sievert and counts. If you have to locate sources (lost, stolen or orfans) Geiger could be better. To dose measurements or even identification you need to go for scintillators/spectroscopic. Do not forget also what happens in Goiania with a scintillator.
Thanks for the response. It should be noted that no comparison was intentionally made or intended. The sole purpose of the small digital meter placements was to indicate there was no hidden source in the area skewing the timed count. Being that the small meters had different sized detection crystals it was decided to let them display the calibrated and expectedly consistent dose rate as opposed to the large difference in raw cpm. I’ve reviewed that portion of the video and it’s clear the reasoning wasn’t direct enough. I’ll add an update to the description to address.
@@ClagwellsGarage The idea was not to criticize; it was to help and improve. I work with these detectors, polimaster, thermo, identifinder, fulcrum , sparcs from DoE ( 16 to 64 liters of NaI), etc. Also, big and small geiger tube detectors range from low to high dose rates. To cover the full needs, most modern detectors come with scintillators and Geiger tubes for high doses. The question is, many users, not well trained, associate high numbers of counts with high doses, and for the same dose rate, a 1cm3 detector with give small number of counts when compared to a 1000cm3
@@eldermagalhaesdesouza3479 My career (ret) was in orphan source detection. CPM was paramount for location with dose used for safety and gamma spec (RIID) for ID. Can’t even begin to tell you how much fun it was writing up grants requests for Thermo, Flir, and others. Anyway, the “average Joe” I’ve found is mostly interested in source location, or raw cpm activity from something like a fiestaware plate or their granite countertop. Being as such, most of these vids will be focused on raw cpm efficiency or a detectors ability to sense very minor elevations. Doubtful I’ll ever get into dose rates too much but the heads up is greatly appreciated. I’ll probably make this a highlighted point in future vids.
@@ClagwellsGarage I understand you. I used detectors in Goiânia and also Chernobyl. In some points/spots I got 1 Sv/h...for those who works at NEST or MEST teams and emergency response . Some calibartions in past , I used " strong" sources close ...
good video, so is the "Photomultiplier Exposed to Light " video
Great , I can't believe you have so much equipment . the Scintillator detector is useful for what specific radiation , presumably alpha , beta Gamma ( ? Neutron with moderator? )
@@quantum-inc Gamma, however it can be used to detect alphas indirectly via braking radiation. A good example would be the low energy x-rays being emitted from a common smoke detector even though the Am241 source is primarily alpha. The metal casing and photon shielding of a typical Scint will make it blind to betas. Otoh, a typical Geiger tube can detect all three, but gammas will comparatively trickle in as seen in the video.
Scintillators can also indirectly detect neutrons via proton recoil. Requires a special type of plastic scintillator material… definitely a good topic for a future vid.
You can find scintillators materials that can be used for both, gamma and neutron. But NaI and CsI work only for gamma.
4 years later and these are still as rare as hens teeth. Enjoyed the video demonstration of this. Maybe I will be fortunate enough to run across one someday.
Great job on that one. I can imagine how bad the battery corrosion was. Looks like new now. I’ll have to look for your video on restoring the crystals if you made one. That’s one skill I don’t have. Elegant job on the battery conversion setup.
If I may ask: What is that black counter with the big lump on the back? It looks a little bit like a mutant BetterGeiger S-1
The small digital one on the left?
I now want a scintillator...
It was nice to see the 700 with a good scintillation detector. Got a video of your MSG 711? Have you seen the videos on my two? I would love to have one of those French models! Very nice. Video on it soon?
Sure have and I just revisited them. Those look to be in great shape! The 711 is the last vintage detector I purchased before temporarily shifting gears into some other projects. So it’s been on the shelf until last week. Hopefully soon I’ll get it operating. That Saphymo is a beast! Much heavier than the PRI Scints. I’ll get a decent presentation on that one soon.
Finally got around to checking out what kind of Geiger counter is out in the tool barn. Eberline PAC 4g Alpha counter with probe Serial 4156
Car 54 Where Are You
Is that Jell-O?
I think this particular test used vegetable oil. Mineral oil is preferred