Energy deposition studies of block-coil quadrupoles for the LHC luminosity upgrade

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At the LHC upgrade luminosity of 10{sup 35} cm{sup -2} s{sup -1}, collision product power in excess of a kW is deposited in the inner triplet quadrupoles. The quadrupole field sweeps secondary particles from pp-collisions into the superconducting (SC) coils, concentrating the power deposition at the magnetic mid-planes. The local peak power density can substantially exceed the conductor quench limits and reduce component lifetime. Under these conditions, block-coil geometries may result in overall improved performance by removing the superconductor from the magnetic mid-planes and/or allowing increased shielding at such locations. First realistic energy deposition simulations are performed for an interaction ... continued below

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Kashikhin, V.V.; Monville, M.E.; Ferracin, P.; Sabbi, G.L. & Mokhov, N.V. June 1, 2007.

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Description

At the LHC upgrade luminosity of 10{sup 35} cm{sup -2} s{sup -1}, collision product power in excess of a kW is deposited in the inner triplet quadrupoles. The quadrupole field sweeps secondary particles from pp-collisions into the superconducting (SC) coils, concentrating the power deposition at the magnetic mid-planes. The local peak power density can substantially exceed the conductor quench limits and reduce component lifetime. Under these conditions, block-coil geometries may result in overall improved performance by removing the superconductor from the magnetic mid-planes and/or allowing increased shielding at such locations. First realistic energy deposition simulations are performed for an interaction region based on block-coil quadrupoles with parameters suitable for the LHC upgrade. Results are presented on distributions of power density and accumulated dose in the inner triplet components as well as on dynamic heat loads on the cryogenic system. Optimization studies are performed on configuration and parameters of the beam pipe, cold bore and cooling channels. The feasibility of the proposed design is discussed.

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  • Journal Name: IEEE Transactions on Applied Superconductivity; Journal Volume: 17; Journal Issue: 2; Related Information: Journal Publication Date: 2007

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  • Report No.: LBNL-1371E
  • Grant Number: DE-AC02-05CH11231
  • DOI: 10.1109/TASC.2007.898393 | External Link
  • Office of Scientific & Technical Information Report Number: 946060
  • Archival Resource Key: ark:/67531/metadc895488

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • June 1, 2007

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  • Sept. 27, 2016, 1:39 a.m.

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  • Oct. 28, 2016, 7:10 p.m.

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Kashikhin, V.V.; Monville, M.E.; Ferracin, P.; Sabbi, G.L. & Mokhov, N.V. Energy deposition studies of block-coil quadrupoles for the LHC luminosity upgrade, article, June 1, 2007; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc895488/: accessed May 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.