[Seminars] Accelerator seminar "Trapping & Probing Antihydrogen Atoms" by Jonathan Wurtele from UC Berkeley (Today!)

Holly Hernandez holly2 at uchicago.edu
Mon Apr 4 10:18:38 CDT 2016

Accelerator Seminar today!

Monday April 4, 2016
ERC 401

Speaker: Jonathan Wurtele from UC Berkeley

Title: Trapping & Probing Antihydrogen Atoms

Abstract: Precision spectroscopy of antihydrogen is a promising path to sensitive tests of CPT symmetry. The ALPHA Collaboration, in series of experiments at the CERN Antiproton Decelerator, has combined antiprotons and positrons to create antihydrogen atoms in a magnetic minimum trap. Trapping times of 1000s have been achieved. Over 1000 antihydrogen atoms have been trapped and a series of initial physics studies has been performed. ALPHA has illuminated antihydrogen atoms with microwaves and measured the positron spin flip frequency to ~0.1%. A very crude direct bound on the antihydrogen acceleration in the Earth’s gravitational field limits the gravitational-to-inertial mass ratio to |Mg/M| <~100. A Fermi acceleration inspired experimental technique has recently been employed to set a bound on the charge neutrality of antihydrogen to ~< 10-9 e. The talk will provide an overview of the techniques we used to trap antihydrogen, ALPHA’s physics results and plans for the future.
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