CERN Accelerating science

Article
Title	Reshimming of Tevatron Dipoles; A Process-Quality and Lessons-Learned Perspective
Author(s)	Blowers, James N ; Hanft, Ray ; Harding, David J ; John, Carson ; Robotham, William
Affiliation	(Fermilab, Batavia, Illinois)
Publication	2005
In:	21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.3156
Subject category	Accelerators and Storage Rings
Abstract	Over the last two years corrections have been made for the skew quadrupole moment in 530 of the 774 installed dipoles in the Tevatron. This process of modifying the magnets in situ has inherent risk of degrading the performance of the superconducting accelerator. In order to manage the risk, as well as to ensure the corrections were done consistently, formal quality tools were used to plan and verify the work. The quality tools used to define the process and for quality control are discussed, along with highlights of lessons learned.