[HN Gopher] GoPro Ride Through an Electron Beam Irradiator at Fu...
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GoPro Ride Through an Electron Beam Irradiator at Full Beam Power
[video]
Author : firebaze
Score : 123 points
Date : 2024-02-19 11:36 UTC (11 hours ago)
(HTM) web link (www.youtube.com)
(TXT) w3m dump (www.youtube.com)
| wkat4242 wrote:
| I wonder what that thing is actually used for
| r2_pilot wrote:
| In this video, it's for examining calcite according to the
| description; I believe I've also seen similar devices used for
| making lichtenburg figures in acrylic.
| Ballas wrote:
| You might be correct on both counts:
| https://fusor.net/board/viewtopic.php?t=8666 (I'm not sure if
| this is the same run, the link in my link seems to be dead)
| GordonS wrote:
| I believe they are used to irradiate cannabis too (to kill
| mould & yeast) - electron-bean irradiation retains much more
| terpenes than gamma irradiation does!
| GordonS wrote:
| Yes, a lot of commercially grown cannabis is,
| unfortunately, irradiated. Different countries (abd
| different US states) have different laws about the amount
| of mould and yeast that are permitted on sold cannabis
| flowers (as well as other things, such as moisture
| content). The target is quite hard to meet got some
| markets, including the UK and EU.
|
| To get to the required levels, irradiation isn't
| _necessary_... but it 's cheap and easy. I get the sense
| that it's often used because of poor growing practises,
| more than anything else.
|
| I can't speak for other countries, but in the UK most
| cannabis has until recently been gamma irradiated - which
| often led to practically terpless flower that smelt of damp
| hay. More recently, e-beam (electron-beam) irradiation has
| largely taken over - and it seems to be much, much kinder
| on terpenes! Honestly, most is now impossible to tell apart
| from non-irradiated flower.
|
| I don't have actual data, I'm afraid. There's a single
| paper talking about cannabinoid and terpene content of
| cannabis after gamma irradiation, which was paid for by
| Bedrocan - but I haven't found anything about how it
| compares to e-beam.
| joarv0249nw wrote:
| Could be for food irradation:
| https://en.wikipedia.org/wiki/Food_irradiation
| chankstein38 wrote:
| I believe I was actually at this facility around the time this
| video was taken! I was there with a large group mixing
| scientists and others who were sending acrylic through it to
| make captured lightning/lightning sculptures/lichtenberg
| figures! It was a really cool experience!
|
| I met this guy there: https://www.capturedlightning.com/
| myself248 wrote:
| One common use is cross-linking polymers. If you've ever used
| cable with XLPE insulation, it was initially extruded onto the
| wire as normal polyethylene, then spooled back and forth
| between drums passing under an e-beam system like this, to
| perform the cross-linking. It's phenomenally tough stuff after
| that; a lot of cars use XLPE (in its thinwall TXL spec) wiring.
| nhecker wrote:
| "The irradiation facility is the Mercury Plastics NeoBeam
| facility which is used for cross linking plastics" --
| http://www.rtftechnologies.org/physics/neobeam-m12d10y2016.h...
| joarv0249nw wrote:
| https://en.wikipedia.org/wiki/Food_irradiation
| lordfrito wrote:
| I never thought I'd see a Resonance Cascade, let alone create
| one.
| geocrasher wrote:
| That looks a lot like several levels of the first Portal. That
| conveyor system didn't run on GladOS, did it?
| proactivesvcs wrote:
| Huh, so those factory and warehouse levels in Quake II were
| accurate? Stuff does just get ferried around on conveyor belts
| for seemingly no reason.
|
| Pleasing taste, some monsterism.
| Arrath wrote:
| Seems safer than having a PhD push the sample into the electron
| beam with a trolley.
| perihelions wrote:
| The PhD's cheaper.
| csours wrote:
| The first grad student is cheaper. The lawsuit ... ehhh
| giantrobot wrote:
| Lawsuits require survivors. The implications are clear.
| toxik wrote:
| _They're waiting for you Gordon, in the test chamberrr..._
| dylan604 wrote:
| But no PhD would do physical labor. That's what undergrads,
| PhD candidates, or even the interns are for.
| LeoPanthera wrote:
| I recently watched a short YouTube video detailing the process
| of making high-end rice cookers in a Japanese factory:
|
| https://youtu.be/xLCwr8qG1p4
|
| The process includes parts being moved around on some of the
| shortest conveyer belts I've ever seen, in some cases moving
| just a few feet before being picked up by another person.
| jasonwatkinspdx wrote:
| The tightest bottleneck sets the pace for the whole line, so
| yeah high volume manufacturing can get into really detailed
| optimization.
| pests wrote:
| Yep. Even in the linked video around 3:20 the assembly
| makes a short 3foot trip on a conveyer. There's a cut there
| but you could imagine instead of walking the part that
| distance and back now they have half the next item already
| done. Looks like some are used as a small queue for the
| next station as well to give some slack to timing
| variations.
| patcon wrote:
| Ah just like with the "PhD student" joke in another thread:
| the value is likely in the "workers compensation case"
| savings when you can show that you did everything humanly
| possible to mitigate risk of injury, should there be a
| claim
| ooterness wrote:
| In this case, the long twisty tunnel is necessary for operator
| safety. Even if you're not in the beam itself, anything within
| direct line-of-sight is getting irradiated by various secondary
| effects. Having a few right-angle turns in the entry and exit
| tunnels mitigates this to acceptable levels.
| cgannett wrote:
| You can tell that's absolutely what its for because right
| after the turn you start seeing the static from the electrons
| messing with the camera.
| guitarsteve wrote:
| It also provides a natural place to hide loading screens
| between levels! ;-)
| ein0p wrote:
| I'm surprised it not only survived this, but also did not even
| stop filming.
| scaredginger wrote:
| It was shielded
| i80and wrote:
| I wondered about that, but from the description:
|
| > GoPro is enclosed in a 3/8" thick lead pig with a 1/2" thick,
| 50% lead glass window. Additionally there is a 1/4" thick lead
| plate above the camera box to provide shielding from direct
| irradiation from the beam.
| animatethrow wrote:
| Aliens could plausibly sterilise earth from light years away
| using an electron beam, according to a great Kurzgesagt episode:
|
| https://www.youtube.com/watch?v=tybKnGZRwcU
|
| An electron beam seems to be the stealthiest of the three
| extermination options, the other two being a star laser and
| antimatter "rods from God."
| FirmwareBurner wrote:
| _> An electron beam seems to be the stealthiest of the three
| extermination options_
|
| Or they could just false flag a nuke strike and watch us
| sterilize ourselves.
| gridspy wrote:
| A lot of effort is currently put into tracking missile
| launches and predicting ballistic trajectories. The goal is
| to give some warning if a nuclear strike is launched.
|
| It would be obvious if a strike came from an extraterrestrial
| source, there would be no terrestrial launch detection.
|
| In addition, such a attack is unlikely to succeed. It would
| take a long time to arrive on earth and by the time the
| result of the attack was known there could be angry
| Earthlings counterattacking.
| Onavo wrote:
| If they entered the atmosphere stealthily and launched from
| sea level, then it would appear to be similar to a
| submarine launched missile.
| AtlasBarfed wrote:
| The state actor would probably assume a surreptitiously
| placed space-borne nuke, like on a "space telescope" or
| other larger satellite.
|
| You don't need all that fuel to get it into space, it's
| already there. You just drop the warhead.
| dylan604 wrote:
| The aliens would have superior tech, so hacking into our
| systems would be trivial. They could just launch an actual
| nuke rather than lobbing one in from space.
| throwanem wrote:
| People assume this and I never understand why. Even if we
| postulate highly complex realtime computing as a
| necessity for controlling a superluminal engine, why
| assume an entire technological history unrelated to ours
| would make it trivial, or for that matter _possible,_
| that even FTL-capable extraterrestrials can compromise
| earthly systems?
|
| 'The thing about aliens is they're _alien._ ' - why
| assume this only works in one direction?
| dylan604 wrote:
| You're assuming that the aliens are _alien_.
| throwanem wrote:
| If there's a reason to assume otherwise, I've yet to
| become aware of it. Or are you getting at something more
| earthly in scope?
| nextaccountic wrote:
| A common trope in sci fi is that aliens are actually
| people from the future traveling back in time
| throwanem wrote:
| That's fair; I suppose I _am_ assuming this story doesn
| 't have that kind of Golden-Age twist in it...
| dylan604 wrote:
| Or from the same planet but spread out via FTL travel
| either ships or wormhole gates. After all, we were made
| in the image of _THE_ creator, right?
| throwanem wrote:
| Speaking of Golden Age twists! And not fully thought-
| through ones, at that. It requires two assumptions: first
| that there exists a yahweh-style creator deity, and
| second that Genesis 1:26 is accurate to fact. Even taking
| both as axiomatic, this approach still further assumes
| that _this_ likeness, namely the one in which we as
| humans are made, must also be the _only_ likeness in
| which a mortal could be made after its creator.
|
| Given the assumptions of faith under which we here labor,
| it may also be wise to heed 1 Cor. 2:11, in which the
| convert Roman makes one of his few worthy statements in
| warning men against imagining they can know the mind of
| God. In that light, the proposition lacks soundness even
| under its own axioms.
| dylan604 wrote:
| >It requires two assumptions:
|
| You're kidding right? It's all SciFi. In case you're
| confused, the Fi is short for Fiction. Stuff that's not
| real. So of course we're making assumptions on the entire
| thing. Including The Book as the greatest selling book of
| fiction of all time.
|
| You're also now assuming that _we_ Earthlings are the
| original source. Some scifi tropes state we 're more
| Martian fleeing their dying planet or with things like
| panspermia. I like the SciFi where everyone is searching
| for the nearly mythical planet that turns out to be
| Earth. Ice Pirates is a goofy one.
| throwanem wrote:
| Of course we're making assumptions. But if we don't
| choose to either be bound by the assumptions we've
| already made or re-evaluate them, then we're playing with
| dolls rather than worldbuilding. Your pastimes are of
| course your own business, but it's been a long time
| indeed since I graduated from the former to the latter.
| krisoft wrote:
| > It would be obvious if a strike came from an
| extraterrestrial source, there would be no terrestrial
| launch detection.
|
| There would be no launch detected, that is true. That
| doesn't mean that it would be obvious that the attack was
| extraterestrial. The alternative hypothesis would be the
| that the known terrestrial enemies developed some technique
| to confuse your sensors, or cloak themselves, or bribe your
| watchdogs, or pre-position warheads in space, or any other
| similar deception. People would be sooner thinking that
| their enemies smuggled nukes in overland than to think that
| aliens attacked them.
| shkkmo wrote:
| Or just nudge a couple of big asteroids into collision
| courses
| randomname93857 wrote:
| They probably can do that much cheaper: just come up with two
| opposing conspiracy theories, and people will naturally
| divide into 2 camps and will eagerly kill each other.
| perihelions wrote:
| That's probably physically impossible for a charged-particle
| beam (like electrons). It would defocus itself from its own
| self-interaction, as well as from interaction with intervening
| magnetic fields.
|
| On this theme: we know several types of natural, astrophysical
| accelerators of charged particles--but none of those are
| observed as a localizable source of charged particles, from the
| perspective of astronomy. We just see secondary photons.
| JumpCrisscross wrote:
| > _probably physically impossible for a charged-particle beam
| (like electrons)_
|
| That's the point of the relativistic part of a relativistic
| electron beam. Time dilation doesn't give the beam internal
| time to self interact.
| orbital-decay wrote:
| Related:
|
| https://en.wikipedia.org/wiki/Anatoli_Bugorski
|
| https://en.wikipedia.org/wiki/Tr%E1%BA%A7n_%C4%90%E1%BB%A9c_...
| cgijoe wrote:
| So... what would happen if you took a ride with it? Instant
| death? Painful death? Slow death over several days? I need
| details!
| Analemma_ wrote:
| Depending on the voltage, you might die immediately from being
| electrocuted, or a few days later from radiation poisoning. The
| stories of the people who died from the Therac-25 machine are
| probably instructive:
| https://en.wikipedia.org/wiki/Therac-25#Radiation_overexposu...
| jasonwatkinspdx wrote:
| There's a Russian Physicist that was in an accident where a
| proton beam went through his head:
| https://en.wikipedia.org/wiki/Anatoli_Bugorski He lived but
| with some brain injury. I'm not sure what the differences in
| effect electrons vs protons and a focused vs diffuse beam would
| be though.
| evanjrowley wrote:
| For those of you who chucked reading the Half Life references in
| that video's comments, here's a video for you:
| https://youtu.be/XfgN-EzthJM?si=_yilEGjcCdEf1sYP
| SomeoneFromCA wrote:
| Ha, now I see why I suddenly got it in my youtube
| recommendations.
| ethbr1 wrote:
| I didn't realize how much Valve mentally linked miniature rail
| cars, physics, and Half Life for me...
| totetsu wrote:
| The tripod is a trigger too
| sandworm101 wrote:
| Like the original Pirates of the Caribbean, but with science!
|
| Fyi, if you start seeing those little single-pixel stars in your
| VR headset, you have probably wandered out of the play area.
| conjecTech wrote:
| Didn't expect to see a familiar face at the end! Andrew, if
| you're reading this, greetings from a fellow RoboJacket!
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