Non-linear effects in the RHIC interaction regions: measurement and correction

Author

Pilat, F. ; Binello, S. ; Cameron, P. ; Ptitsyn, V.

Author_Institution

Brookhaven Nat. Lab., Upton, NY, USA

Volume

3

fYear

2003

fDate

12-16 May 2003

Firstpage

1703

Abstract

A technique for measuring and correcting locally non-linear effects arising from field errors and feed-down from the interaction region (IR) triplets has been developed at RHIC. After a brief review of the method, we will compare measurements taken with different IR optics configurations, with beta at the interaction point ranging from 3 to 1 m. The beam data are compared with results from a realistic RHIC model, which includes measured field errors in the magnets, and simulates operational effects and corrections. A control room application has been developed for the RHIC run 2003 that allows faster measurements of non-linear effects, online plotting and fitting of non-linear terms from measurements of tune shift as a function of orbit bump amplitude. Results for local non-linear correction during run 2003 are presented.

Keywords

beam handling techniques; colliding beam accelerators; ion accelerators; particle beam diagnostics; storage rings; synchrotrons; IR optics configurations; RHIC interaction regions; RHIC run 2003; control room application; nonlinear effect measurement; nonlinear effects correction; nonlinear term fitting; online plotting; orbit bump amplitude; tune shift; Data analysis; Error correction; Extraterrestrial measurements; Magnetic field measurement; Magnets; Nonlinear optics; Optical polarization; Phase measurement; Power supplies; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the

ISSN

1063-3928

Print_ISBN

0-7803-7738-9

Type

conf

DOI

10.1109/PAC.2003.1288642

Filename

1288642