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Title: Field quality of the LHC inner triplet quadrupoles being fabricated at Fermilab

Abstract

Fermilab, as part of the US-LHC Accelerator Project, has designed and is producing superconducting low-beta quadrupole magnets for the Large Hadron Collider (LHC). These 70 mm bore, 5.5 m long magnets operate in superfluid helium at 1.9 K with a maximum operating gradient of 214 T/m. Two quadrupoles, combined with a dipole orbit corrector, form a single LQXB cryogenic assembly, the Q2 optical element of the final focus triplets in the LHC interaction regions. Field quality was measured at room temperature during fabrication of the cold masses as well as at superfluid helium temperature in two thermal cycles for the first LQXB cryogenic assembly. Integral cold measurements were made with a 7.1 m long rotating coil and with a 0.8 m long rotating coil at 8 axial positions and in a range of currents. In addition to the magnetic measurements, this paper reports on the quench performance of the cold masses and on the measurements of their internal alignment.

Authors:
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
811351
Report Number(s):
FERMILAB-Conf-03/109-E
TRN: US0303070
DOE Contract Number:  
AC02-76CH03000
Resource Type:
Conference
Resource Relation:
Conference: PAC2003, Portland, OR (US), 05/12/2003--05/16/2003; Other Information: PBD: 2 Jun 2003
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACCELERATORS; ALIGNMENT; CRYOGENICS; DIPOLES; FABRICATION; FERMILAB; HADRONS; HELIUM; MAGNETS; PERFORMANCE; QUADRUPOLES; TRIPLETS

Citation Formats

Velev, Gueorgui V. Field quality of the LHC inner triplet quadrupoles being fabricated at Fermilab. United States: N. p., 2003. Web.
Velev, Gueorgui V. Field quality of the LHC inner triplet quadrupoles being fabricated at Fermilab. United States.
Velev, Gueorgui V. 2003. "Field quality of the LHC inner triplet quadrupoles being fabricated at Fermilab". United States. https://www.osti.gov/servlets/purl/811351.
@article{osti_811351,
title = {Field quality of the LHC inner triplet quadrupoles being fabricated at Fermilab},
author = {Velev, Gueorgui V},
abstractNote = {Fermilab, as part of the US-LHC Accelerator Project, has designed and is producing superconducting low-beta quadrupole magnets for the Large Hadron Collider (LHC). These 70 mm bore, 5.5 m long magnets operate in superfluid helium at 1.9 K with a maximum operating gradient of 214 T/m. Two quadrupoles, combined with a dipole orbit corrector, form a single LQXB cryogenic assembly, the Q2 optical element of the final focus triplets in the LHC interaction regions. Field quality was measured at room temperature during fabrication of the cold masses as well as at superfluid helium temperature in two thermal cycles for the first LQXB cryogenic assembly. Integral cold measurements were made with a 7.1 m long rotating coil and with a 0.8 m long rotating coil at 8 axial positions and in a range of currents. In addition to the magnetic measurements, this paper reports on the quench performance of the cold masses and on the measurements of their internal alignment.},
doi = {},
url = {https://www.osti.gov/biblio/811351}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {6}
}

Conference:
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