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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. Geoff Brumfiel‏Verified account @gbrumfiel 13 Dec 2017
      • Report Tweet

      Geoff Brumfiel Retweeted CNS

      Woaaah... this is pretty cool! But @ferencdv, who thinks they'll test a 250 KT fission bomb?! Nobody builds those, do they?https://twitter.com/CNS_Updates/status/941025996400144384 …

      Geoff Brumfiel added,

      CNS @CNS_Updates
      Advances in seismic monitoring and #neutrino physics may make detecting #nuclear explosions—and possibly @ctbto_alerts work— even more reliable, according to a study by @ferencdv and colleagues: https://arxiv.org/pdf/1712.04001.pdf ….
      2 replies 0 retweets 2 likes
    2. Ferenc DV‏ @ferencdv 13 Dec 2017
      • Report Tweet
      Replying to @gbrumfiel

      If we had a 25 kt yield bomb then it could be detected from about 100 km away. But yeah, even Hyper-K is a large detector! Anti-neutrinos are just hard to detect!

      1 reply 0 retweets 0 likes
    3. Geoff Brumfiel‏Verified account @gbrumfiel 13 Dec 2017
      • Report Tweet
      Replying to @ferencdv

      I suppose another good function would be to help establish if they really are testing thermonuclear weapons (i.e. >250KT yeild + no ν-bar signal = TN).

      2 replies 0 retweets 0 likes
    4. Alex Wellerstein‏Verified account @wellerstein 13 Dec 2017
      • Report Tweet
      Replying to @gbrumfiel @ferencdv

      Though if they do TN that is greater or equal to, say, 500 Kt (not impossible) it is very possible that they could have >250 Kt yield from fission...

      1 reply 0 retweets 1 like
    5. Geoff Brumfiel‏Verified account @gbrumfiel 13 Dec 2017
      • Report Tweet
      Replying to @wellerstein @ferencdv

      Oh because of a U-238 case/tamper thingy?

      2 replies 0 retweets 0 likes
      Alex Wellerstein‏Verified account @wellerstein 13 Dec 2017
      • Report Tweet
      Replying to @gbrumfiel @ferencdv

      Right — most TN weapons are at least 50% fission, some have gone much higher (e.g. 80%), mostly just using the fusion reactions to set off more fission reactions.

      3:54 PM - 13 Dec 2017
      • 1 Like
      • Geoff Brumfiel
      0 replies 0 retweets 1 like

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