Beam transfer, injection, and ejection at ISABELLE

Although the design of the injection and the ejection-beaming dump systems for the planned ISABELLE storage rings is essentially complete, some efforts were made to review design details. The design was found to be sound and workable, and no obvious improvements were discovered. Several preliminary conclusions were drawn: (1) the impedance sum of the injection, ejection, and beam scraper components is expected to be less than 1 ohm; (2) all normal operation particle losses can be absorbed safely in the scraper-absorber systems as conceptually designed; (3) a fast accidental beam dump on the internal absorber at 30 GeV will not damage the absorber or drive the superconducting structure normal; and (4) a fast internal beam dump at 200 GeV would not drive the superconducting structure normal, but the beam absorber would suffer local damage