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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. Alex Wellerstein‏Verified account @wellerstein 3 Feb 2015
      • Report Tweet

      And here is a close-up picture showing how the barrier material looks. Presumably also French.pic.twitter.com/xKgTW9cTfn

      1 reply 2 retweets 4 likes
    2. Nuclear Diner‏ @NuclearDiner 3 Feb 2015
      • Report Tweet
      Replying to @wellerstein

      @wellerstein Got a scale on that?

      1 reply 0 retweets 0 likes
    3. Alex Wellerstein‏Verified account @wellerstein 3 Feb 2015
      • Report Tweet
      Replying to @NuclearDiner

      @NuclearDiner Wikipedia says the pore sizes for gaseous diffusion are on the order of 10-25 nm -- so that would make it ~300-400 nm across?

      1 reply 0 retweets 0 likes
    4. Nuclear Diner‏ @NuclearDiner 3 Feb 2015
      • Report Tweet
      Replying to @wellerstein

      @wellerstein That's beyond the light resolution limit. When was the photo taken? Light or electron microscopy?

      1 reply 0 retweets 0 likes
      Alex Wellerstein‏Verified account @wellerstein 3 Feb 2015
      • Report Tweet
      Replying to @NuclearDiner

      @NuclearDiner Mid-1980s -- my guess is electron microscopy. But there is no caption data.

      6:13 PM - 3 Feb 2015
      1 reply 0 retweets 0 likes
        1. Nuclear Diner‏ @NuclearDiner 3 Feb 2015
          • Report Tweet
          Replying to @wellerstein

          @wellerstein That could have the resolution.

          0 replies 0 retweets 0 likes
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