[SLAC] [SLAC Pubs and Reports]

SLAC-AP-114
Drifting of Closed Orbit in the High Energy Ring

Abstract

Since the beginning of this commissioning period (November-December,1998), the closed orbit drift of a few millimeters in both horizontal and vertical planes in the High Energy Ring(HER) has been observed. Because optics, coupling and beam size in the ring depend on the closed orbit, the drifting of the orbit makes systematic improvement of the machine very difficult if not impossible. It is very difficult to keep any experiments repeatable, which is crucial for studying the instabilities in the machine. In this note, we will present some initial measurements and analysis of the problem.

Full Text

PDF

Compressed PostScript

Notes

The PDF version of this document was distilled from a PostScript file most likely created from LaTeX source which used Type 3 fonts. The resultant PDF may be unreadable on the screen at the default viewing magnification (fonts will appear bitmapped, jagged), though the type will be legible at higher magnifications.

Despite the cosmetic problems resulting from the use Type 3 fonts in the original source file, such PDF files print without problems; likewise, the onscreen text is searchable and selectable.

More Information

Full bibliographic data for this document, including its complete author list, is (or soon will be) available from SLAC's SPIRES-HEP Database.
Please report problems with this file to posting@slac.stanford.edu. The SLAC preprint inventory is provided by the SLAC Technical Publications Department.
Page generated 05 Apr 2001 @ 11:07 PDT by htmlme.pl