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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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