Jefferson Lab Joe Preble

1
Jefferson LabJoe Preble Mark Wiseman

• ILC
• Type IV Cryomodule Design Meeting
• CERN
• January 16-17, 2006

2
Jefferson Lab Experience and Capabilites

• gt15 years experience operating two SRF based
  accelerators, 45 Cryomodules
• CEBAF - 5.75 GeV, 200uA CW to 3 experimental
  halls
• FEL 85 - 165 MeV, gt5mA CW (gt 10 kW CW IR
  output) with energy recovery
• Full range of scientific and engineering support
  for SRF research, design, development and
  production (SNS)
• Cavity production and processing
• Presses, CNC shops and E-beam welding
• High- and Low-Temp furnaces, BCP, EP and HPR
• Clean rooms and assembly facilities
• Extensive cavity and cryomodule testing
  facilities
• Cryomodule design, construction and operation
• RF control design and operation
• Static and dynamic Lorentz detuning measurement
  and control
• Micro-phonic modeling and measurement
• Full range of design and analysis tools
• Integrated RF, thermal and structural design
  (HFSS, MAFIA, SUPERFISH, ANSYS, IDEAS)
• HOM analysis, measurement and damping
• BBU simulation and control

3
Jefferson Lab Recent Experience

• SNS
• Five years from start of design to finish of
  production
• Prototype cavities and ß.61 cryomodule
• (12) ß0.61 and (11) ß0.8 cryomodules (exceeded
  specification)
• CEBAF
• Developed two new 1500 MHz cavity designs, Low
  loss and High gradient
• Three JLAB upgrade cryomodules
• CEBAF SL21 (50 MeV), FEL03 (80 MeV),
  Renascence (gt100 MeV in VTA)
• Experience working with industry in fabrication
  of numerous components

4
Jefferson Lab Work in Progress

• Rework of installed cryomodules to provide robust
  6 GeV CEBAF operation
• Goal is 2.5 times the original module energy
  specification ? 50 MeV
• One cryomodule in progress, continuing program
  planned for several more cryomodules
• CEBAF 12 GeV Upgrade
• Refining the Cryomodule design and preparing for
  production start
• RF power and digital low level controls
• Large grain niobium material and cavity
  development alternative cavity shapes
• EP process development
• Improved cavity process reproducibility, control
  and documentation including process equipment
  data logging
• High Current, 1 amp CW, 750 MHz cavity and
  cryomodule for FELs
• Design and cavity prototyping underway

5
Jefferson Lab Collaborations

• Industry
• High current injector ( 100 mA 1 A)
• Parts fabricated, assemble in Fall 06
• SRF photoinjector
• Large-grain/single-crystal materials
• Advanced RF and multipacting simulation codes
• XHV techniques and technologies
• University
• Thin film deposition (also with industry
  participation)
• Plasma etching
• Niobium materials studies and surface
  characterization
• Hydrogen in Nb surface and bulk effects
• National Labs
• Alternative fabrication processes (DESY, INFN,
  KEK)
• single cavity high current cryomodule (BNL)
• ILC-related work (FNAL) more to follow
• 3.9 GHz cavity assembly (FNAL)

6
JLAB Current ILC Commitments

• Further investigations of performance of
  multi-cell cavities produced from
  large-grain/single-crystal material
• Development of a US capability for
  electropolishing and testing ILC-style multi-cell
  cavities
• Development of US capability to fabricate TESLA
  cavities deliver 2 to FNAL
• Development and testing of superconducting joint
  to enable superstructure-based cryomodule
  construction evaluation of superstructure
  options for ILC
• Participation in Global Design Effort (staff
  membership in ILC Americas Regional Team and
  Configuration Control Board)

7
JLAB ILC Participation

• Further Areas of ILC interest
• Cavity development, design, and optimization
• Cavity manufacturing and processing
• Tuners, slow and fast
• Manufacturing and assembly, industrialization
• System integration
• Cryogenic, RF and controls, interlocks

8
JLAB ILC Participation

• JLAB is excited to be working with the ILC team
  and would like to increase our contribution/partic
  ipation
• Could contribute an additional gt5 FTEs in FYO6
  with increased support possible in future years
• however
• Further JLAB involvement will require additional
  HEP funding/support from ILC labs/DOE