Field quality in low-β superconducting quadrupoles and impact on the beam dynamics for the Large Hadron Collider upgrade

Boris Bellesia; Jean-Pierre Koutchouk; Ezio Todesco

doi:10.1103/PhysRevSTAB.10.062401

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Field quality in low-β superconducting quadrupoles and impact on the beam dynamics for the Large Hadron Collider upgrade

Boris Bellesia, Jean-Pierre Koutchouk, Ezio Todesco

DOI 10.1103/PhysRevSTAB.10.062401 · Physical Review Special Topics - Accelerators and Beams

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Abstract

A possible scenario for the luminosity upgrade of the Large Hadron Collider is based on large aperture quadrupoles to lower β* in the interaction regions. Here we analyze the measurements relative to the field quality of the RHIC and LHC superconducting quadrupoles to find out the dependence of field errors on the size of the magnet aperture. Data are interpreted in the framework of a Monte Carlo analysis giving the reproducibility in the coil positioning reached in each production. We show that this precision is likely to be independent of the magnet aperture. Using this result, we can carry out an estimate of the impact of the field quality on the beam dynamics for the collision optics.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Nb-Ti Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Nb3Sn Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown