Title :
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
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;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2006. IMTC 2006. Proceedings of the IEEE
Conference_Location :
Sorrento
Print_ISBN :
0-7803-9359-7
Electronic_ISBN :
1091-5281
DOI :
10.1109/IMTC.2006.328154
