G' Dugan

1
ILC-Americas Regional Efforts

• G. Dugan
• ILC/GDE and Cornell University

International Linear Collider Industrial Forums
Fermilab Sept. 21, 2005
2
GDE Elements of the Near Term Plan

• Baseline/alternate Configuration and Reference
  Design Report
• Continue to define LC Configuration (Snowmass,
  Aug 05)
• Baseline Configuration Document, together with
  alternatives, by end of 2005
• A structured electronic document, including links
  to reports, drawings, technical specs, parameter
  tables, etc.
• A printable / readable summary document (100
  pages)
• Put Baseline under Configuration Control (Jan 06)
  
• By end of 2006, develop 3 volumes -- 1) Reference
  Design Report 2) Shorter glossy version for
  non-experts and policy makers 3) Detector
  Concept Report
• Supporting RD Program
• Coordinate worldwide R D efforts, in order to
  demonstrate and improve the performance, reduce
  the costs, attain the required reliability, etc.
  (Proposal Driven to GDE)

3
ILC-Americas Regional Team
ANL
BNL
Cornell LEPP
Fermilab
Jefferson Lab
LBNL
LLNL
SLAC
TRIUMPF
Universities
4
RD resource allocation in FY05
5
ILC-Americas Lab RD Program in FY05-06

• Main Linacs
• 1.3 GHz SCRF cavity fabrication and processing
  Fermilab, JLab, ANL, Cornell
• High gradient cavity RD Cornell, Jlab, SLAC
• ILC cryomodule design Fermilab, Jlab, SLAC
• RF power sources and controls- SLAC, LLNL,
  Fermilab
• Machine design and simulation- SLAC, Fermilab,
  Cornell
• Sources
• Design and simulation- SLAC, LLNL, Cornell
• Damping rings
• Machine design and simulation- LBNL, Fermilab,
  SLAC, ANL, Cornell
• Component prototyping- SLAC, LLNL, Cornell
• Beam delivery systems
• Design and simulation- SLAC, BNL, Fermilab
• Component prototyping- BNL
• Global Systems
• Availability and machine protection- SLAC,
  Fermilab
• Site development- Fermilab, SLAC

6
ILC-Americas University RD Program

• SCRF materials and surface preparation
  Wisconsin, Northwestern, Old Dominion
• RF power sources Yale, MIT
• Polarized electron source Wisconsin
• Polarized positron source Tennessee, Princeton
• Damping rings Illinois, NCAT
• Instrumentation, diagnostics UCLA, Berkeley,
  Vanderbilt
• Mover systems Colorado State
• Radiation hard electronics UC Davis
• Ground motion Northwestern

7
Main Linacs Cavity fabrication and processing
Fermilab, Jlab, ANL, Cornell
Enhance infrastructure at Fermilab/ANL for cavity
treatment and testing establish process for
repeatable production of high-performance (35
MV/m, Qgt1010) cavities

• Acquire cavities from AES, ACCEL, KEK utilize
  existing lab facilities to process cavities

4 ACCEL
Cavity Fabrication FNAL SMTF
4 AES
4 KEK
Early 06 Joint FNAL/ANL BCP facility
Processing Jlab/Cornell/ANL
Cavity Processing FNAL ANL
Vertical Testing Cornell/Jlab
Vertical Testing FNAL
Spring 06 Horz. Test Facility
Horizontal Testing Fermilab
Cavity to String Assembly
Achieve 35 MV/m by FY08
8
Main Linacs High-gradient RD
Cornell Re-entrant 1.3 GHz cavity Single cell Nb
cavity, 70 mm TESLA-like aperture achieved 46
MV/m at Q 1010. Hpk 175.5 mT, Epk 100 MV/m
JLab Single crystal 2.3 GHz LL cavity Single
crystal BCP surface rms 27 nm. Typical BCP
surface rms 1247 nm, EP 251 nm
Hpk160.2 mT
9
Main linacs RF power sources and controls

• Development at SLAC, Fermilab and LLNL
• Baseline modulators and klystrons, LLRF and
  controls developments at SMTF
• Alternate modulator designs for reduced
  cost/improved reliability and performance
  SNS-style, Marx generator, series-switched (DTI)
• Coupler improvements beyond TTF-3 design
• Evaluate RF distribution system options
  (alternatives to circulators)
• L-band test facility at SLAC (ESB) (FY06/07)
• Test modulators and klystrons
• Provide rf power for NC accelerator structures
  and couplers

10
Main linacs Cryomodule design

• Cryomodule design Fermilab, JLab
• Develop 4th generation (ILC) cryomodule design,
  in collaboration with INFN, DESY, KEK

11
Main Linacs Industrialization

• Industrialization
• In the longer term develop and support start-up
  industrial production capability in the US
  transfer cavity and cryomodule technology pursue
  paths to large-scale industrialization and design
  for manufacturing.
• In FY06, in support of the reference design and
  cost estimate initiate industrial cost studies
  for cavities, cryomodules, RF systems, civil
  construction (subject to fiscal constraints).

12
Electron and Positron Sources

• Electron source SLAC, Fermilab
• Continuing photocathode development, begin laser
  and gun development
• Positron source SLAC, LLNL, Cornell
• Studying target design for undulator,
  conventional, and Compton sources
• Radiation damage
• Thermal shock / beam damage
• Engineering issues (high rotation speed, remote
  handling)
• Capture and optics studies
• Normal conducting capture structure design and
  fabrication
• Complete E-166 polarized positron production
  (summer 2005)

13
Damping rings

• Development at LBNL, SLAC, Fermilab, ANL, Cornell
• Damping ring design and simulation
• Optics, tuning studies, collective effects
• Wiggler design and optimization
• SEY studies for electron cloud
• Laboratory measurements at SLAC
• Building three chambers for PEP-II installation
  to verify solutions
• ATF at KEK
• Instrumentation, Beam studies, ATF Kicker
  development, FONT/Feather

14
Damping Ring Options
6 km ANL-Cornell-Fermilab ring
Other designs from SLAC and LBNL
TESLA 17 km ring
15
Main linacs- Beam Line Design and simulation

• Bunch compressor design SLAC, LBNL, Cornell
• Multiple stage designs are being considered for
  reduced energy spread or reduced bunch length
• Main linac emittance tuning SLAC, Fermilab,
  Cornell
• Evaluating emittance tuning procedures
• Considering implications on linac design
  (Stronger or weaker lattice desired? BPM
  resolution? Laser-straight linac required?
  Tolerance to stray fields? Benefits from RF
  cavity HOM BPMs?)
• Quadrupole alignment and vibration studies SLAC
• BPM, Laser wire, cavity diagnostics tests SLAC,
  with TTF, ATF and LCLS

16
Beam Delivery System

• Optics design and layout (SLAC, Fermilab, UK
  groups)
• Study variations of BDS with different crossing
  angles, collimation systems, L, etc to
  understand tradeoffs
• ATF-2 at KEK
• Demonstration of new FFS using ATF beam
• Proposal is being assembled detailed
  contributions to be defined
• Specialty magnets (SLAC, BNL)
• SC final quadrupoles are being prototyped at BNL
• End Station A Test Facility (SLAC, UK and
  University groups)
• MDI instrumentation studies, collimator wakefield
  studies
• Construct IR mock-up

17
Global systems-availability and machine protection

• Availability and downtime modeling- SLAC, with
  DESY
• More to it than just MTBF and MTTR
• Expanding a time-domain simulation written for
  USLCTOS
• Currently studying impact of low-intensity
  conventional positron source in conjunction with
  undulator source
• Machine protection - SLAC, with DESY
• Just getting started. Current work classifying
  scenarios which lead to single-pulse or
  single-train damage

18
Global systems Civil/Site development

• Sample site development efforts focused on
  Illinois site(s) near Fermilab.
• Fermilab and SLAC civil engineers are evaluating
  five sample sites using a site considerations
  matrix-common methodology for all regional sites
• The current effort is not intended to select a
  potential site, but rather to understand from the
  beginning how the features of the sites will
  affect design, performance, and cost.
• A single sample site will be selected as the
  Americas region candidate for inclusion in the
  2006 Reference Design Report

19
Conclusion

• ILC-Americas is getting organized and
  co-ordinated.
• A robust program is being developed, in support
  of the GDE goals of a baseline (plus
  alternatives) configuration this year, and a
  reference design report and cost estimate by the
  end of 2006.
• ILC-related RD efforts in the Americas are
  growing. To optimally utilize the available
  resources, we need to fully co-ordinate the RD
  efforts within the Americas and across the
  regions.