"Nuclear Archaeology" Inspires Replica of Hiroshima's Little Boy
James Cho writes "Through a decade of painstaking reverse engineering, trucker John Coster-Mullen built the first accurate replica of the Hiroshima bomb. His work yielded a new history of the first nukes, 'Atom Bombs: The Top Secret Inside Story of Little Boy and Fat Man,' with historian Robert Norris saying, 'Nothing else in the Manhattan Project literature comes close.' Philip Morrison, one of the physicists who helped invent the bomb, deemed it 'a remarkable job.'"
*BOOM*
You just got troll'd!
How soon until homeland security shows up accusing him of terrorism?
Fight Spammers!
Is my mind just twisted or is there an innuendo of sorts in the fact that the article is titled Atomic John, with a photograph below of the guy in question and a huge atomic phallic substitute seeming to come out of his crotch?
You just got troll'd!
Just push this button he
FR1ST PEDANTIC POST
The guy went through declassified government documents to gather all the information he could find (including design information), and went from there. I don't think this is anything like reverse engineering.
If he "reverse engineered" the bomb, wouldn't it mean he put the design together based on blast data from known explosions of this particular device?
#DeleteChrome
is this more interesting than this The web browser is a dead end
Jesus H. Christ, you're sock-monkeying that link all over the place. The answer clearly is, yes, to a lot of people, whatever story you're posting on is more interesting than that particular journal entry. Deal with it, will you?
The correlation between ignorance of statistics and using "correlation is not causation" as an argument is close to 1.
While many people may exclaim that this information is 'dangerous' to be released in the public domain let me remind you of a few small details.
1) ANY high-school/college student should be able to tell you what the critical mass of U235/238 is.
2) Most handymen should be able to make atleast ONE method of creating a critical mass pile.
3) It takes a GOVERNMENT to build multiple copies and revisions and tests to make it bigger/better.
This information does not mean "the terrorists can now make a bomb!" This changes NOTHING that hasn't been known for 50+ years. I would rather live in a society that does not suffer a knee-jerk reaction everytime something unusual is expressed. If anybody knows if this place exists, let me know; I'll start packing.
"The price good men pay for indifference to public affairs is to be ruled by evil men." ~Plato (427-347 BC)
-1: google bombing
Women are like electronics: you don't know how damaged they are until you try to turn them on.
This is yet another example of things which, eight years ago, might have seemed merely odd, rather than somewhat unsettling.
How quaint the 20th Century already seems.
Mmmmmm... Bold, yet refreshing!
A working replica would be dangerous and surely illegal.
If I had a working replica of a nuclear bomb in my basement, I don't think I would give a rat's ass about whether it was dangerous or illegal.
If I did have a nuclear bomb, I would not have a problem.
Some other folks would have a problem.
Schroedinger's Brexit: The UK is both in and out of the EU at the same time!
The Hiroshima bomb was a very simple "gun" design. Plenty of published info on it. It used a navy gun barrel cut down to size, a U235 doughnut target, a polonium initiator, and a U235 projectile. Mighty simple. Any chopper shop could build one, with the exception of getting the Polonium and U235.
This design was abandoned as it had many drawbacks-- it used about 8 times more U235 than absolutely necessary, there was a 7% chance of a fizzle, and there was no way to make it safe.
But it had the advantage that it was dead-simple and guaranteed to work, well 93% of the time.
Now if he made a replica of Fat Man, that would really be something.
There are a lot of stories that appear on /. in which I have absolutely no interest. (The same could be said by practically anyone here.) So you know what I do when one of those stories comes up on the front page? I don't click on it. Easy, simple solution -- let the people who do care about that particular story talk about it, and go find something I care about to read and comment on instead. Everybody wins. It's not that hard a concept to grasp.
The correlation between ignorance of statistics and using "correlation is not causation" as an argument is close to 1.
Comment removed based on user account deletion
Dude, make that thing your signature or you'll forever be modded down.
One thing to keep in mind when you read statement such as "Destroy R. Worlds, former Director of Bomb Design at Los Alamos, said of Joe Amateur's work 'That's very well-done'" is this: reading between the lines of many interviews, articles, and books about and by former weaponeers they give out a lot of misleading, and/or misdirecting, information about how _exactly_ devices are built. They talk openly about the general principles and their scientific and political implications, but when the discussion/interview/chapter turns to the actual details of design, well, the replies turn a bit fuzzy or clever. I suspect that either by explicit training or shared values they give away very little and much of what they say would deliberately lead anyone following down the wrong path.
sPh
You sir or ma'am, are either the best practicing troll ever or a non-troll just tired of changes you've seen at slashdot over the years.
Either way, this is the best troll post I've ever seen. It actually stung me (as a slashdot regular) in a of couple places, and I've grown very cynical of taking anything I see here with any emotional context at all, kudos!
One piece of advice, if you're an actual troll trying a new technique, you've hit the jackpot, just shorten it up a bit and you'll be a legend (well, an anonymous legend, but hey, whaddya expect).
Yeah, I wouldn't really mod this as troll, more like off-topic...
ics
The project could also be a deliberate honeypot.
Its got some abstract image and a story.. But where is the actual scientific meat?
Oh, thats right, knowledge is forbidden in this country.
---- Booth was a patriot ----
That's not even close to a good troll. Like someone running a business is going to take an anonymous comment from a message board seriously and just start laying people off and shutting servers down.
Get real.
You're nothing; like me.
A racist twitter? What the fuck is happening to Slashdot?
It takes a low ID number to have come to this conclusion I think. Spend enough time anywhere and you're bound to learn the ropes.
You're nothing; like me.
From the article: "Actually, he said, nothing about the bomb is secret. He smiled and added, 'The secret of the atomic bomb is how easy they are to make.'"
Hah, good point. OTOH, I'm pretty sure that even right after I joined Slashdot, I didn't post "Hey, why are you guys talking about X when Y is more important" links all over every single damned story. It's a type of trolling, and like most troll techniques, the reasons for it are, I suspect, kind of inexplicable to anyone who doesn't have that particular compulsion.
The correlation between ignorance of statistics and using "correlation is not causation" as an argument is close to 1.
In this book there's a description on how an Al Qaeda member infiltrated the US Army. He had been a major in the Egyptian army before he joined the terrorist group. He went to the US and married an American girl to get citizenship. He joined the US Army and was rather quickly promoted to sergeant, after all he had been a major before and had good knowledge of military subjects. He then proceeded to send US Army training material to Muslim radicals, those manuals were found in Al Qaeda camps in Afghanistan after 9/11.
Seriously now, who do you think would find it easier to get classified information? A truck driver or a US Army sergeant?
If the government wants it to be terrorism in order to invoke the removal of your civil rights, then it is terrorism.
The fear and insanity will subside (I hope).
Sounds like a great example of the cool projects that us geeks often get carried up in.
Though, I'm wondering why the guy ended up as a *truck driver* by trade...
Most of the time, I come by /. for the comments; this is one of the relatively rare top-quality *articles*
I listen to both RIAA and non-RIAA stuff if I like the music, tangential business/politics nonwithstanding.
Does anyone know if the bomb is 'atomically' correct?
http://www.atomicmuseum.com/store/ProductItem.cfm?Category=179
TFA said he uncovered that the Little Boy diameter was 28" rather than 29" - so, I'm not speaking for the accuracy of these blueprints - just letting people know that they're out there.
Frankly, from the account given in the article of the hissy fit that he threw when at the museum in Albuquerque, I wonder about the guy. The museum's always been pretty cool, and back in 93 when he visited it, it was at KAFB. The docents and staff have always been very friendly and helpful, and the displays while at KAFB were surprisingly frank and open.
Pathological kinda promises Path + Logical - but instead, you get stuck with pathetic.
Israel stole over 60 kilos from the US and got away with it. They have never been sanctioned or censured by the US, and no one on the inside has been arrested, but that sure as shit is how they built their first bombs before they built their own reactor.
Australia
That's not even close to a good troll. Like someone running a business is going to take an anonymous comment from a message board seriously and just start laying people off and shutting servers down.
Get real.
Uh...getting people running a business to fire the employees isn't the goal of a troll. Getting a lot of angry responses to a fluff post is the goal, and he's going pretty well at that.
"I zero-index my hamsters" - Willtor (147206)
I think you're vastly underestimating a nuclear weapon's potential to ruin your day.
Nuke technology that has been long-discarded by the superpowers can still be appealing for others; say those with limited technology but unlimited resources of some kind.
Remember the Iranians piecing togther - by (mainly female, oh the irony), hand the shredded documents they stole from the US embassy in Tehran?
Equally, Iraq was well on the way to getting a decent quantity of fissile materiel using centrifuges to separate the different isotopes. The western powers initially discarded the rumours, since all their 'expert' advisors said that this was not considered a viable technology. They forgot that this was how the first enriched uranium was obtained, by the USA, to make the first Bomb.
So - can't afford/obtain the latest designs from a rogue Pakistani/Russian/North Korean source? But do have access to enriched uranium? No problem, build an 'old' Bomb. Still enough to devastate a city...
There is already a to-scale model of Little Boy in the Hiroshima Peace Memorial Museum. It is quite disturbing seeing it, but a visit to the museum is a difficult experience generally.
"I bless every day that I continue to live, for every day is pure profit."
Somebody set up us the bomb!
If video games influenced behavior the Pac Man generation would be eating pills and running away from their problems.
Another important point though is the secrecy behind the Manhattan Project.
We know today that there were only two bombs, but the Japanese didn't know it then. There was a strong implication that we could keep dropping more and more of these bombs until Japan eventually did give up.
That has to be the best quote in the whole article. Imagine if the same amount of research were to be applied against, oh, the Bible.
... of both Fat Man and Little Boy.
See here, for example.
If you disagree with me on social issues, then it's pretty clear that you are a narrow-minded bigot.
Actually, it is a pair of nested cylinders, and the rationale behind it is brilliant.
To get the biggest possible boom, you want to bring together the largest possible mass of fissile material. Problem: if you accumulate too large a mass, it starts a chain reaction on its own.
But if you form that mass into a ring shape, and make the hole in the ring large enough, you create extra surface area for neutrons to escape, but the gap is too big for them to have sufficient energy to split an atom on the other side of the gap.
For a given outer diameter (fixed by the inner diameter of the bomb casing) the maximum mass of fissile material is obtained with a cylinder whose height is determined by the mass on the "side" of the cylinder nox exceeding criticality. A mating cone shape results in a smaller usuable mass.
So why make the projectile hollow instead of shooting a slug into a hollow target? Because the sides of the gun barrel constrain the movement of the projectile and ensure that the mating surfaces are aligned.
It's actually, for such a "crude" design, brilliant engineering.
DG
Want to learn about race cars? Read my Book
Where's the Whatcouldpossiblygowrong tag? :P
and strapped it to the back of your motorcycle & had a dead-man switch wired into an EKG strapped to your arm.
Have you been touched by his noodly appendage?
Doesn't this bring up SALT or Nonproliferation issues? I mean the US told North Kora and Iran they could not have nuclear weapons or power but US private citizens are allowed?
Said he as he modded it score -1, troll, and demonstrated yet again that satire is dead.
davecb5620@gmail.com
I always loved the idea in snowcrash.
I mean it really was your own little cold war with everyone else.
Just get a motorcycle with sidecar. Attach nuke to side car. Embed deadman's switch in you body hooked up to vital signs.
Proceed to do whatever the fuck you want, as no one is going to fuck with you... ever.
Or I guess if they do, its only the one time eh?
Well of course the first thing that John Coster-Mullen would have to do is determine what microprocessor family was used on Little Boy. Is it an 8051, Z80, 68000, x386, PIC ? Generally even on OEM parts there's a basic part number. On DIP ROMS there has been a real effort to stay consistent.
John should bear in mind that the working timing of a nuclear bomb is 10 nanoseconds. This makes his microprocessor choices more limited; he'll need some speed here.
Then he needs to get to the code and examine it. If it's in a separate ROM chip this is much easier. For example, I was looking at a flashable EEPROM on a PCI card just yesterday evening and found it had a 29F001-TPC in a nice 32 pin DIP package. 128K x 8 bytes and nice little extras like auto-protection. It's a 120 ns part (from address setup to output enable* and the data pins settled.)
"Little Boy" was not a very efficient bomb at all. It was heavily overengineered. I can remember Ted Taylor calling it a "committee bomb" and a "stupid bomb" in McPhee's book. The committee wanted to make sure it went off and didn't just dig a hole, and hand the Japanese more than a hundred pounds of U-235. If I recall right, and this is just off the top of my head, it yielded only 12.5 kilotons or so.
Robert Serber's "Los Alamos Primer" is really useful here. It takes 10 nanoseconds (one "shake") for a fission to happen ("neutron multiplication time"). "The direct energy release per atom is 170 MeV".
"The energy release of TNT is ~~ 4 x 10^10 erg / gram, or ~~ 3.6 x 10^16 erg / ton.... Hence, 1 kg of U-235 completely fissioned yields about 20,000 tons of TNT equivalent, or ~~ 20 kilotons." [Serber is referring to tons as 2,000 lb tons.]
From this you can see that with a 12.5 kiloton yield, about two thirds of 1 kg of U-235 fissioned, so more or less, plus or minus, about a pound fissioned. Wikipedia says the bomb had 64 kg of uranium and only 600 mg. actually fissioned. I don't understand that number.
To which I can only say, see what happens when you use embedded Windows instead of Linux to drive your timing signals? I can just see it now. The bomb releases, starts falling, and in its microprocessor, it draws The Blue Screen Of Death and halts.
Thanks,
Dave Small
p.s. I really don't know why I wrote this. Maybe it was the coffee this morning.
I suspect Homeland Gestapory won't much care about this guy's model except for the bad press he generated. Doing something bad? No big deal. Making the gooberment look bad? Big deal.
Want to give them more signal with their noise? Here's a good start:
http://www.atomicmuseum.com/store/enterquantity.cfm?ItemID=255&Category=179
Historic Atomic Bomb Blueprints
Set of five (5) individual blueprints of early atomic weapons. These were copied from the original government drawings on to bright white paper, and are bound for you in a "contractor's pack."
Each page measures 16" X 22". Included are dimensional drawings of Fat Man (2), Little Boy (1), and the Mark IV Missile (2).
Set of Five $15.00
"I may be synthetic, but I'm not stupid." -- Bishop 341-B
No one seems to have realized that Philip Morrison died in 2005 - therefore, quoting him for this story is pretty suspect! I see that some of you did discover that this must be an old story, since the book was written in 2002. What happened here? Did Rip Van Winkle just wake up?