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Description
Dust trapping has long been an unwelcome and mysterious phenomenon in both electron and antiproton storage rings; it leads to a sudden decrease in beam lifetime and a sudden increase in beam emittance, respectively. At the Photon Factory Advanced Ring (PF-AR), dust trapping has been a perpetual nuisance to synchrotron radiation experiments since their beginning in the 1980s. However, during recent research on dust trapping at the PF-AR, video cameras serendipitously captured the culprit behind this phenomenon; the cameras recorded a luminous micro-particle trapped in the beam, just as if a shooting star were traveling in the beam tube. In the successive research, supersensitive cameras repeatedly observed trapped dust particles, and revealed that they behaved differently under different conditions. In my talk, not only the experimental results but also long-term statistics data supporting the current dust-trapping theory are also presented.
Organised by
Paolo Chiggiato
