Register for an account

X

Enter your name and email address below.

Your email address is used to log in and will not be shared or sold. Read our privacy policy.

X

Website access code

Enter your access code into the form field below.

If you are a Zinio, Nook, Kindle, Apple, or Google Play subscriber, you can enter your website access code to gain subscriber access. Your website access code is located in the upper right corner of the Table of Contents page of your digital edition.

The Sciences

The last proton

Cosmic VarianceBy Daniel HolzSeptember 30, 2011 7:29 AM

Newsletter

Sign up for our email newsletter for the latest science news

04-0475D-300x229.jpg

At 2pm today, in a field not far from downtown Chicago, a final proton will smash into an antiproton. And then the Tevatron, the most powerful particle accelerator for almost three decades, will be shut off after producing over 500 trillion proton-antiproton collisions (over 10 inverse femtobarns). The Tevatron discovered the top quark, the Bc meson, and the tau neutrino. It measured direct CP violation, constrained the possible mass of the Higgs, precisely measured a range of masses and lifetimes, as well as a host of other important scientific contributions. It was a remarkable machine, but it has now been superseded by the Large Hadron Collider.

10-0291-01D-300x268.jpg

Science marches on, and after a glorious career, it is time for the Tevatron to go dark. Fermilab is throwing a goodbye party. You don't just throw a switch and turn off a particle accelerator. The process is slow and deliberate. The superconducting magnets will take roughly a week to warm back up. And the data will take many months to analyze. But at some point tomorrow afternoon North America will witness its last controlled TeV particle collision.

    2 Free Articles Left

    Want it all? Get unlimited access when you subscribe.

    Subscribe

    Already a subscriber? Register or Log In

    Want unlimited access?

    Subscribe today and save 70%

    Subscribe

    Already a subscriber? Register or Log In