Tevatron Alignment Issues 2003-2004

Author

Volk, J.T. ; Annala, J. ; Elementi, L. ; Gelfand, N. ; Gollwitzer, K.E. ; Greenwood, J. ; Martens, M. ; Moore, C. ; Nobrega, A. ; Russell, A.D. ; Shiltsev, V. ; Stefanski, R. ; Sager, T. ; Syphers, M.J. ; Wojcik, G.

Author_Institution

FNAL, Batavia, Ill. 60510, USA, volk@fnal.gov

fYear

2005

fDate

16-20 May 2005

Firstpage

2146

Lastpage

2148

Abstract

It was observed during the early part of Run II that dipole corrector currents in the Tevatron were changing over time. Measurement of the roll for dipoles and quadrupoles confirmed that there was a slow and systematic movement of the magnets from their ideal position. A simple system using a digital protractor and laptop computer was developed to allow roll measurements of all dipoles and quadrupoles. These measurements showed that many magnets in the Tevatron had rolled more than 1 milli-radian. To aid in magnet alignment a new survey network was built in the Tevatron tunnel. This network is based on the use of free centering laser tracker. During the measurement of the network coordinates for all dipole, quadrupole and corrector magnets were obtained. This paper discusses roll measurement techniques and data, the old and new Tevatron alignment network.

Keywords

Algebra; Coordinate measuring machines; Distortion measurement; Extraterrestrial measurements; Magnetic fields; Magnets; Measurement techniques; Orbits; Portable computers; Position measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2005. PAC 2005. Proceedings of the

Print_ISBN

0-7803-8859-3

Type

conf

DOI

10.1109/PAC.2005.1591038

Filename

1591038