Model-independent and fast determination of optical functions in storage rings via multiturn and closed-orbit data

Autor: Bernard Riemann, Patrick Grete, Thomas Weis
Jazyk: angličtina
Rok vydání: 2011
Předmět:
Zdroj: Physical Review Special Topics. Accelerators and Beams, Vol 14, Iss 6, p 062802 (2011)
Druh dokumentu: article
ISSN: 1098-4402
DOI: 10.1103/PhysRevSTAB.14.062802
Popis: Multiturn (or turn-by-turn) data acquisition has proven to be a new source of direct measurements for Twiss parameters in storage rings. On the other hand, closed-orbit measurements are a long-known tool for analyzing closed-orbit perturbations with conventional beam position monitor (BPM) systems and are necessarily available at every storage ring. This paper aims at combining the advantages of multiturn measurements and closed-orbit data. We show that only two multiturn BPMs and four correctors in one localized drift space in the storage ring (diagnostic drift) are sufficient for model-independent and absolute measuring of β and φ functions at all BPMs, including the conventional ones, instead of requiring all BPMs being equipped with multiturn electronics.
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