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wellerstein's profile
Alex Wellerstein
Alex Wellerstein
Alex Wellerstein
Verified account
@wellerstein

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Alex WellersteinVerified account

@wellerstein

Historian of science, secrecy, and nuclear weapons. Professor of STS at @FollowStevens. UC Berkeley alum with a Harvard PhD. NUKEMAP creator. Coder and web dev.

Hoboken, NJ / NYC
blog.nuclearsecrecy.com
Joined September 2011

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    1. Casillic‏ @Casillic 31 Dec 2017
      • Report Tweet
      Replying to @Casillic @HamWa07 @DerekL1963

      Note so on Gadget the detonators are actually the ones with wire coming from the side see attached @NuclearAnthro has a lot of great photo of the detonators and fire set of Fatmanpic.twitter.com/0jHgJAQpef

      2 replies 0 retweets 4 likes
    2. Martin “Doomsday” Pfeiffer (⧖)  🏳️‍🌈‏ @NuclearAnthro 31 Dec 2017
      • Report Tweet
      Replying to @Casillic @HamWa07 @DerekL1963

      My understanding is that Fat Man also had double dets per lens for redundancy.

      2 replies 0 retweets 3 likes
    3. Derek Lyons‏ @DerekL1963 31 Dec 2017
      • Report Tweet
      Replying to @NuclearAnthro @Casillic @HamWa07

      Redundant firing circuits, but only one det I should think. Double dets would make detonation symmetry.... interesting. Of course, I could be wrong.

      1 reply 0 retweets 3 likes
    4. Martin “Doomsday” Pfeiffer (⧖)  🏳️‍🌈‏ @NuclearAnthro 31 Dec 2017
      • Report Tweet
      Replying to @DerekL1963 @Casillic @HamWa07

      I think you’re right but I’m probing. You know what? I SUMMON @wellerstein & @AtomicAnalyst WITH CAT PICTURES! If they are willing and able to answer this question! 64 detonators or 32 on Fat Man? Redundant cabling or detonators?

      1 reply 0 retweets 2 likes
    5. Casillic‏ @Casillic 31 Dec 2017
      • Report Tweet
      Replying to @NuclearAnthro @DerekL1963 and

      No worries, pretty sure it’s two cable per detonator, 1 detonator per HE len, here’s some of @nuclearanthro awesome pictures of the Fatman fire set and detonator

      3 replies 0 retweets 3 likes
    6. Alex Wellerstein‏Verified account @wellerstein 31 Dec 2017
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      Replying to @Casillic @NuclearAnthro and

      This is a moderately trick question... each lens had a single EBW detonator unit, but each of the detonators of the kind used on Fat Man each had two, redundant bridgewires on it (the "sidearms" of the "handlebar") with separate input from a different fireset.pic.twitter.com/Fz0Zvw3Las

      2 replies 2 retweets 9 likes
    7. Radio & Nukes‏ @HamWa07 31 Dec 2017
      • Report Tweet
      Replying to @wellerstein @Casillic and

      Where the diagnostic cables checking the timing of the EBW's?

      1 reply 0 retweets 1 like
    8. Alex Wellerstein‏Verified account @wellerstein 31 Dec 2017
      • Report Tweet
      Replying to @HamWa07 @Casillic and

      They were for checking detonator simultaneity — they were known as "informer" switches, and would be triggered by the high explosives as they went off.pic.twitter.com/8VatUl9wVV

      1 reply 1 retweet 6 likes
    9. Martin “Doomsday” Pfeiffer (⧖)  🏳️‍🌈‏ @NuclearAnthro 31 Dec 2017
      • Report Tweet
      Replying to @wellerstein @HamWa07 and

      Uhhhhhhh “where they get it is their business” is there a story behind that?

      1 reply 0 retweets 4 likes
    10. Radio & Nukes‏ @HamWa07 1 Jan 2018
      • Report Tweet
      Replying to @NuclearAnthro @wellerstein and

      The cable? If we had the type we would know the impedance which is intrestring to this electrical nerd as to how the firing circuit was designed.

      1 reply 0 retweets 1 like
      Alex Wellerstein‏Verified account @wellerstein 1 Jan 2018
      • Report Tweet
      Replying to @HamWa07 @NuclearAnthro and

      It's just copper coax cable. The inductance of the cable is 0.09 uh per foot, per Coster-Mullen.

      6:40 PM - 1 Jan 2018
      • 3 Likes
      • Radio & Nukes Martin “Doomsday” Pfeiffer (⧖) 🏳️‍🌈 Casillic
      1 reply 0 retweets 3 likes
        1. Radio & Nukes‏ @HamWa07 1 Jan 2018
          • Report Tweet
          Replying to @wellerstein @NuclearAnthro and

          Cool thanks.

          0 replies 0 retweets 0 likes
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