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US LHC Accelerator Research Magnet Program Workshop on Advanced Accelerator Magnets “Magnets Beyond NbTi” S. Gourlay, LBNL March 17 – 18, 2003 Archamps, France. US LARP Activities. The program is organized into four areas of research: Accelerator physics experiments and calculations

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US LHC Accelerator Research Magnet Program

Workshop on Advanced Accelerator Magnets

“Magnets Beyond NbTi”

S. Gourlay, LBNL

March 17 – 18, 2003

Archamps, France

S. Gourlay


Us larp activities
US LARP Activities

The program is organized into four areas of research:

  • Accelerator physics experiments and calculations

    • Understanding performance limitations of current IRs and developing new designs

    • Participation in the sector test and machine start-up

    • Beam dynamics calculations and experiments

  • Developing high performance magnets for new higher luminosity Irs

    • Large-aperture, high gradient quadrupoles using Nb3Sn.

    • High-field beam separation dipoles

  • Developing advanced beam diagnostics and instrumentation

  • Commissioning our hardware for the LHC

S. Gourlay


Us lhc accelerator research program
US LHC Accelerator Research Program

  • US LARP Magnet Program

    • Continue US collaboration on LHC construction project

    • Improve long-term physics research opportunities of the LHC

      • Provide technology choices for AP

    • Extend US expertise in high–field accelerator magnets

      • Represents the first opportunity to use Nb3Sn in an accelerator

    • Develop world-wide collaboration on high-performance magnets

      • CERN, ESGARD, KEK, EU, etc.

      • Archamps Workshop

S. Gourlay


Us lhc accelerator research program1
US LHC Accelerator Research Program

  • Integrate the three US laboratoriesand include university participation

    • Leveraged by

      • Existing technology base

      • Intellectual resources

      • Facilities

  • BNL – React and wind Nb3Sn and HTS studies

  • FNAL – Wind and react Nb3Sn cos-theta dipoles

  • LBNL – High field, Nb3Sn dipoles

S. Gourlay


Lhc accelerator upgrades
LHC Accelerator Upgrades

  • Luminosity (IR upgrade)

    • Options

      • IR I

        • Large aperture quad with maximum gradient > 250 T/m

      • IR II

        • High gradient 2/1 quad with maximum gradient > 300 T/m

        • Large bore separation dipole with a field > 15 T

        • Smaller bore, 2/1 dipole with a field > 15 T

  • Energy Upgrade

    • Technology development supported by LARP, applied through LBNL base program

      • Small aperture, high field arc dipoles (17 T)

Initial program target

S. Gourlay


Us lhc accelerator research program2
US LHC Accelerator Research Program

  • Focus is on Nb3Sn, large-aperture quadrupoles

  • Also considers development of high-field beam-separation dipoles

    • Required in all IR upgrades scenarios under consideration

  • Builds on “generic” Nb3Sn dipole R&D programs

  • Initial program is to develop technologies, not specific designs

  • Specific design choices will be made after several years of magnet R&D and related accelerator design studies

    (Large-aperture linear and non-linear correction magnets will have substantially higher pole-tip fields than in the baseline IRs and may become quit challenging)

S. Gourlay


Us lhc accelerator research program3

Main Issues

High fields and gradients

Large beam-induced heat loads

Extend and quantify limits on key performance parameters

Issue-driven program designed to develop an enabling technology base for LHC upgrades and future accelerators

2003 – 05

Technology, simple models

2006 – 09

More complex models

2010 – 12

Accelerator-ready prototype

US LHC Accelerator Research Program

Nb3Sn

S. Gourlay



High field nb 3 sn dipole prototypes
High Field (Nb3Sn) Dipole Prototypes

9 10 11 12 13 14 15 16 17 T

LHC

(CERN, 1988)

MSUT

(U. Twente 1995)

LHC

Luminosity Upgrade

LHC

Energy Upgrade

RD3c

(LBNL 2002)

RT-1

(LBNL 1999)

D-20

(LBNL 1996)

1.9K

RD3b

(LBNL 2001)

S. Gourlay


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