Title :
Alignment and survey of the elements in RHIC
Author :
Trbojevic, D. ; Cameron, P. ; Ganetis, G.L. ; Goldman, M.A. ; Gupta, R. ; Harrison, M. ; Hemmer, M.E. ; Karl, E.X. ; Jain, A. ; Louie, W. ; Mulhall, S. ; Peggs, S. ; Tepikian, S. ; Thomas, R. ; Wanderer, P.
Author_Institution :
Brookhaven Nat. Lab., Upton, NY, USA
Abstract :
The Relativistic Heavy Ion Collider (RHIC) consists of two rings with cryogenic magnets at a 4.5 K operating temperature. Control of positions of the dipole and quadrupole cold masses (iron laminations) and the beam position monitors (BPM´s) during production and installation is presented. The roll of the dipoles is controlled by a combination of rotating coil measurements with the surveying measurements. The center of the quadrupole magnetic field is obtained by direct measurement of the field shape within a colloidal cell placed inside the quadrupoles. Special attention is given to the triplet quadrupole alignment and determination of the field center position
Keywords :
accelerator magnets; beam handling techniques; colliding beam accelerators; cryogenics; electromagnets; ion accelerators; particle beam diagnostics; position control; storage rings; synchrotrons; 4.5 K; RHIC; Relativistic Heavy Ion Collider; beam position monitors; colloidal cell; cryogenic magnets; dipole cold masses; field center position; laminations; position control; quadrupole cold masses; quadrupole magnetic field; rotating coil measurements; surveying measurements; triplet quadrupole alignment; Coils; Cryogenics; Iron; Lamination; Magnetic field measurement; Magnets; Production; Rotation measurement; Shape measurement; Temperature;
Conference_Titel :
Particle Accelerator Conference, 1995., Proceedings of the 1995
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-2934-1
DOI :
10.1109/PAC.1995.505467
