LS2 report: rejuvenation for the antiproton decelerator | 3/13/2019 | Staff
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The Antiproton Decelerator (AD), sometimes known as the Antimatter Factory, is the world's largest source of antimatter and has been operational since 2000. Here, antiprotons are slowed down and sent into the experiments, where they are combined with antielectrons to produce the most basic antiatom: that of antihydrogen. Over the course of the second long shutdown of CERN's accelerator complex (LS2), the AD will receive several enhancements as well as repairs and refurbishments.

The recently installed ELENA ring, which was commissioned over 2017 and 2018, is designed to slow down even further the antiprotons decelerated by AD to ensure that the experiments can trap up to 100 times more antiprotons than they could without it. At the moment, ELENA is only connected to one of the experiments within the AD hall, the new GBAR experiment. The main work being done on the AD during the next two years is to extend the beam line from ELENA to all of the existing experiments and get ELENA fully operational. The lines that took the particles from the AD to the experiments have now been fully dismantled to prepare for the new injection lines from ELENA.

Activities - AD - Magnets - Focus - Whizzing

Other planned and ongoing activities involve the AD's 84 magnets, which focus and steer the whizzing antiprotons along their racetrack. Most of these magnets were recycled from previous accelerator facilities and are much older than the AD itself. They are in need of repairs and refurbishment, which started during the previous long shutdown (LS1) and was pursued during subsequent year-end technical stops (YETS). So far, nine of the magnets have been treated, and 20 of them are scheduled for treatment during LS2. The remaining magnets will...
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