Report on ILC-Americas

1
Report on ILC-Americas

• G. Dugan
• Cornell University

ILC-European Regional Meeting
2
The Global Design Effort
Formal organization begun at LCWS 05 at
Stanford in March 2005 when Barry Barish became
director of the GDE
Technically Driven Schedule
3
GDE Elements of the Near Term Plan

• Baseline configuration and Reference Design
  Report
• Begin to define Configuration (Aug 05)
• Baseline Configuration Document by end of 2005
• Put Baseline under Configuration Control (Jan 06)
  
• Develop Reference Design Report by end of 2006
• 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)

4
ILC-Americas Organization
5
ILC-Americas program support

• The program is supported in the US by DOE and NSF
  and is growing

Agency FY04 FY05 FY06
DOE/HEP (K) 19,600 22,600 25,000
NSF/EPP (K) 128 118 NA
Presidents budget
(Numbers exclude detector RD)
6
ILC-Americas Program

• Main Linacs
• Superconducting module fabrication and test-
  Fermilab,JLab, ANL, LANL, MSU, Cornell, 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

7
Main Linacs-Superconducting Module Fabrication
and Test

• SCRF development and test capabilities in the US
  are distributed over a number of labs (Fermilab,
  JLab, Cornell, MSU, LANL)
• To consolidate and focus the efforts, Fermilab
  has received a proposal for a Superconducting
  Module and Test Facility (SMTF) to be constructed
  at Fermilab. Signatories include all major US
  institutions with significant SCRF experience,
  plus a number of international labs.
• This proposal provides a framework for the
  development of a US-based capability in the
  fabrication and test of high-gradient
  superconducting accelerating structures for the
  ILC.

8
SMTF Proposal Cavities
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 US industry, 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 Cryostat
Horizontal Testing Fermilab
Cavity to String Assembly
Achieve 35 MV/m by FY08
9
SMTF Proposal Cryomodule design and fabrication

• Acquire TTF cryomodule components from US
  industry and DESY assemble cavity strings and 2
  cryomodules in new Cryomodule Assembly Facility
  (FY06-07) develop 4th generation (ILC)
  cryomodule design

8 Cavities US/ ACCEL Built/US processed
4 Cavities KEK Built/US processed
10
Proposed Cryomodule Assembly Facility at Meson
Polarized Area at Fermilab (MP9)
11
SMTF proposal Cryomodule testing and
industrialization

• Cryomodule testing
• Test cryomodules, measure key performance
  parameters (TRC), in a new High-power Test
  Facility (HPTF)
• Single module power tests Meson Lab
• Beam tests, using the relocated A0 photoinejctor
  New Muon Lab
• Industrialization
• 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.

12
High power test facility at Fermilab
New Muon Lab
13
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 1755 Oersted, Epk 100
MV/m
JLab Single crystal 2.2 GHz cavity Single
crystal BCP surface rms 27 nm. Typical BCP
surface rms 1247 nm, EP 251 nm
14
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)
• Klystron development acquire 10 MW L-band MBK
  tubes, evaluate options and alternatives (sheet
  beam)
• Coupler improvements beyond TTF-3 design
• Evaluate RF distribution system options, new
  circulator designs
• L-band test facility at SLAC (ESB) (FY06/07)

15
SLAC End Station B L-Band RF Test Facility

• Build two L-band test stations next to NLCTA in
  ESB
• Test modulators and klystrons
• Provide rf power for NC accelerator structures
  and couplers

16
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)

17
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

18
Damping Ring Optics
6 km ring
Injected beam
Tracking with injected positron beam in Fermilab
6 km design indicates essentially no loss after 1
damping time
After tracking

• New optics proposed based on PEP-II
  non-interleaved sextupole correction ? Pi-cell
  and FODO cell designs

Dynamic aperture in Dogbone Damping Ring designs
17 km ring
TME (DESY TDR)
Pi-cell (low a Pep-II)
19
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

20
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

21
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.

22
Global systems Civil/Site development

• Civil design ( tunnels, shallow/deep, terrain
  following) tied to site features
• Comparison will be made to an ideal reference
  design to highlight advantages and disadvantages

• Milestone Descriptions
• Milestone One Snowmass 2005
• Complete Comparative Site Assessment Matrix with
  Collaboration with Asian and European Regions
• Milestone Two December, 2005
• Identify a Sample Site for Inclusion into the
  Reference Design Document
• Milestone Three December, 2006
• Complete Conventional Facilities Portion of the
  Reference Design Document

23
Conclusion

• ILC-Americas is getting organized and
  co-ordinated.
• A robust program is being developed, in support
  of the GDE goals of a baseline configuration this
  year, and a reference design report 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 across the regions. This will be one of
  the most important functions of the GDE.

24
Beam Delivery System

• Optics design and layout (SLAC, Fermilab, UK
  groups)
• Study variations of BDS with different crossing
  angles, collimation systems, L, etc ? 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

25
End Station A Test Facility For Prototypes of
Beam Delivery and IR Components
Collimator design, wakefields (T-480) BPM energy
spectrometer (T-474) Synch Stripe energy
spectrometer (T-475) IP BPMs, kickers EMI
(electro-magnetic interference) IR Mockup
http//www-project.slac.stanford.edu/ilc/testfac/E
SA/esa.html