Dust Gallery

The plots show example of dust trapping during the BEAST background experiment. Dust (particulate matter) becomes positively charged and is attracted to the e- beam (HER). Dust trapping events were first observed and studied in detail in the HERA electron ring. Dust trapping was also studied at the PF (Photon Factory) by the KEKB vacuum group.

Background bursts in the diodes (DVLTnn) and drift tubes (PTnnn) in the figures below are observed to coincide with drops in the beam lifetime (lifeh). The frequency of dust events seems to go down as the beam current increases. Perhaps the dust is cooked ??

  • Dust in HER storage run 1252

  • Dust in HER storage run 1253

  • Dust in HER storage run 1257

  • Dust in HER storage run 1288

  • Dust in HER storage run 1712

  • Dust in HER storage run 1713

  • The Dust Problem at HERA contribution to IEEE PAC 1995

  • Removing Dust at HERA with Kickers contribution to EPAC 1996

  • Theory of Dust F.Zimmermann, J.T. Seeman, M. Zolotorev, SLAC-95-6738



    As Varner has noted: "The study of dust is still in its infancy"
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    6/9/99