Measurement of magnetic axis in accelerator magnets: critical comparison of methods and instruments

Author

Bottura, L. ; Buzio, M. ; Pauletta, S. ; Smirnov, N.

Author_Institution

AT Dept., CERN, Geneva

fYear

2006

fDate

24-27 April 2006

Firstpage

765

Lastpage

770

Abstract

We review 19 measurement systems for the magnetic axis of accelerator magnets, used to align machine components. First, we provide some background information and we describe briefly the instruments and methods used for the magnetic and the geometric measurements. For all systems we give then a performance summary in terms of magnet parameters and measurement uncertainties. The dataset is analyzed statistically to identify the parameter with the most influence on the total uncertainty, which is magnet length. Finally we derive scaling laws relating uncertainties to magnet´s parameters, and we discuss the relative performance of the various methods

Keywords

accelerator magnets; magnetic variables measurement; particle accelerator accessories; superconducting magnets; Large Hadron Collider; accelerator magnets; geometric measurements; machine components; magnet parameters; magnetic axis measurement; measurement uncertainties; superconducting magnets; Accelerator magnets; Coordinate measuring machines; Extraterrestrial measurements; Instruments; Large Hadron Collider; Machine components; Magnetic sensors; Optical sensors; Structural beams; Superconducting magnets; Hall sensors; Large Hadron Collider; harmonic coils; magnetic axis; magnetic measurements; multipole superconducting accelerator magnets; optical survey; stretched wire;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 2006. IMTC 2006. Proceedings of the IEEE

Conference_Location

Sorrento

ISSN

1091-5281

Print_ISBN

0-7803-9359-7

Electronic_ISBN

1091-5281

Type

conf

DOI

10.1109/IMTC.2006.328154

Filename

4124432