Lecture 13 (3.8.2021) - Rudiments of Nuclear Weapons Physics

[abcde_fz]

. At about an hour and fifty minutes our presenter talks about Uranium enrichment in Iran, Iraq, Libya, and such.
What he didn't mention is that his friend who saw the materials being trucked away in the one country also did inspections in Libya. The centrifuges, because they must rotate at incredible speed, must be balanced to the point of the margin for error being absolutely ridiculously small, like inch in the radius of the device, so that the weight is balanced and the thing won't spin up and explode like a bomb.
The fun part is when the guy was in Libya, they showed him parts of the centrifuges, but they insisted that they were being used for some mundane purpose. They tried to hide behind lies.
Well when the guy was being shown the dozens and dozens of $100, 000.00 aluminum central portions of the centrifuges, all he did was touch each one as he was counting them.
The minute weight of the oil in his fingerprints on each unit was enough to throw the balance off to the point that when each rod was first spun up, the rods would shake themselves badly enough to make them useless from that point on.
I heard the story in another video called something like "How Nuclear Bombs Work 101: Part 2/2"

[iitzfizz]

There actually were 'wet' bombs designed and fielded as 'emergency capability weapons' based on the Mike design which used cryogenic Dewar flasks to store the fusion fuel.

[Evan_Bell]

23:00. Popular misconception. The primary and the sparkplug don't produce sufficient neutron flux to breed a meaningful number of Tritons. D-D ignition is initiated and it's its fusion neutrons that breed Tritium.

[daynosdr]

this guy says 'Ugh" mega-tones

[Kokyiintx]

This reminds me of how conservation of energy is the bedrock that all verifiable science springs from.

[Oneover_]

Um um um um um um curious um um um um um thank um um um you um um um um.... holy hell

[emilkarpo]

The use of this lecture in a drinking game by anyone but the most professional and experienced drinkers is strongly not advised. Stamina is an absolute must to get through the first 10 minutes.

[Nickle]

Question 1. On the plastic, is that expanded, or just solid plastic?
Question 2. The mean path of a neutron, and the probability it hits a nucleus. If the metal is compressed and so the density rises, then the length available to hit a nucleus goes down, before it escapes. How does that interaction pay out with yield? I presume it reduces it.
Question 3. With explosives, what increase in density can you achieve? Fat man, levitated pip etc, how does that work.

[LCdrDerrick]

I've always problems with my designs. Whenever I crush the first stage into criticality, the corresponding chemical charges also destroy the shared casing with the second and third stage, but which is important as a radiation reflector to start the fusion, long before it could suit this role. I almost destroyed and irradiated seven livable planets now, but I don't come further. I've tried bigger casings, less tamper, even pits with extra layers and a floating core, to achieve criticality sooner. Do you have any tips for me please? Perhaps the Teller-Ulam design is a propaganda lie from the beginning and those bombs follow completely different principles? I've even tried to work around Pu239 and fission, using the intercept of potent pulse lasers to start the fusion. Please, I do not want to destroy and poison whole civilisations and biospheres.

[matthewrecord]

Actually a very valuable lecture, and clearly presented. Thank-you Professor ! Little biased for Berkeley, and too few mentions of Col U or Chicago, but that is forgivable.

[hypercomms]

What about Thermal Diffusion for the separation of Uranium 235 from 238??!!

[bradleyknopp]

Although I find any talks on these topics to be very interesting... this one is almost unlistenable with how much he says "um" "uh" "uhh" "um"... good information presented ... if you can break though the maddingly distracting ums and uhs... good god... I'll just read the transcript...

[Live.Vibe.Lasers]

is the slide in the thumbnail with the neutron initiator featured anywhere in this video? If not, where might I find it?

[BigDaddy-ypmi]

Never use 'uh', 'um', 'like', 'aaaahhh' when publicly speaking.

[martinross]

Ummm ahhh um ah ah ehhhh umm ah ah um umm ah um ah ah um etc etc

[hanniballisticbear]

I cannot listen to a lecture full of UM UH UMM UMMM UH

[PlasmaRayInSpace]

What are yall saying? He speaks fine, well i get it.

[camresearch]

Teller was really smart. If I had built an exploding fusion factory, I would not be out to watch the event. You would find me also hiding in a basement far away ☀️... Not fun in the Sun.

[MrYukon]

I find uhm, uhm, this talk uhm, lecture uhm, uhm not uhm so, so uhm ins- uhm spiring.

[Metastasic]

Even the closed captions are saying “ehhh. Ummm” it’s infuriating. Please redo these lectures with a person able to speak the English language clearly. What a waste.