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DTSTAMP:20220217T201927Z
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DTSTART;TZID=US/Eastern:20220216T153000
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DESCRIPTION:Motivated by the baryogenesis problem (the scarcity of antimatt
 er in the University)\, CERN's ALPHA collaboration has been studying the p
 roperties of antihydrogen atoms. Since first trapping antiatoms in 2010\, 
 we have learned to routinely trap over 1000 antiatoms simultaneously\, and
  keep the antiatoms trapped for many tens of thousands of seconds. We have
  been able to measure the 1S-2S and hyperfine bandwidths to the 10kHz leve
 l\, which\, on some scales\, exceeds the accuracy of the best CPT tests. W
 e have been able to laser cool the antiatoms\, which should lead to better
  spectral measurement\, and we have also measured the antihydrogen charge 
 to 0.7ppb. We are constructing a new apparatus designed to measure the ant
 imatter g to 1%\, which will be a test of the weak equivalence principle. 
 Antihydrogen is created by mixing positron and antiproton single species p
 lasmas. The plasmas must be very cold (~10K) and\, for single species plas
 mas\, dense (~108 cm-3 ). Arguably\, the most difficult problems in these 
 experiments stem from achieving these parameters as all the other issues\,
  though complex\, can be solved with standard techniques of atomic and las
 er physics. This talk will describe some of these plasma issues and some o
 f our physics results.\n\nCo-sponsored by: MIPSE and SEM NPSS\n\nSpeaker(s
 ): Prof. Joel Fajans\, \n\nBldg: 1311 EECS\, 1301 Beal Ave\, Ann Arbor\, M
 ichigan\, United States\, 48109\, Virtual: https://events.vtools.ieee.org/
 m/301387
LOCATION:Bldg: 1311 EECS\, 1301 Beal Ave\, Ann Arbor\, Michigan\, United St
 ates\, 48109\, Virtual: https://events.vtools.ieee.org/m/301387
ORGANIZER:jordann@umich.edu
SEQUENCE:1
SUMMARY:Fundamental Tests with Antihydrogen Atoms
URL;VALUE=URI:https://events.vtools.ieee.org/m/301387
X-ALT-DESC:Description: <br /><p>Motivated by the baryogenesis problem (the
  scarcity of antimatter in the University)\, CERN's ALPHA collaboration ha
 s been studying the properties of antihydrogen atoms. Since first trapping
  antiatoms in 2010\, we have learned to routinely trap over 1000 antiatoms
  simultaneously\, and keep the antiatoms trapped for many tens of thousand
 s of seconds. We have been able to measure the 1S-2S and hyperfine bandwid
 ths to the 10kHz level\, which\, on some scales\, exceeds the accuracy of 
 the best CPT tests. We have been able to laser cool the antiatoms\, which 
 should lead to better spectral measurement\, and we have also measured the
  antihydrogen charge to 0.7ppb. We are constructing a new apparatus design
 ed to measure the antimatter g to 1%\, which will be a test of the weak eq
 uivalence principle. Antihydrogen is created by mixing positron and antipr
 oton single species plasmas. The plasmas must be very cold (~10K) and\, fo
 r single species plasmas\, dense (~108 cm-3 ). Arguably\, the most difficu
 lt problems in these experiments stem from achieving these parameters as a
 ll the other issues\, though complex\, can be solved with standard techniq
 ues of atomic and laser physics. This talk will describe some of these pla
 sma issues and some of our physics results.</p>
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