ISG-X /NLC Collaboration Meeting

WG3: Structures

H. Carter, T. Higo and J. Wang


  1. Review of progress and experiences in design and fabrication.
  2. Review of high gradient tests.
  3. Plan and schedule toward meeting TRC R1 demonstration requirements - 2003.
  4. Plan and schedule toward meeting TRC R2 demonstration requirements - 2004.
  5. Prepare for the international technology selection process for the X-Band collider.

Participants: Total 10 – 20 (SLAC 6 – 12, Fermi Lab 2 – 4, KEK 2 –4)

Preliminary Agenda

Tuesday, 6/17

   9:00 – 12:00 Plenary
  13:00 – 14:00 Working Group Organization
Discussion on agenda and working group organization
   14:00 – 17:30 High Gradient Test (Joint with RF Power Group)
Yongho Chin Kazakov's some new design for the power distribution system
Chris Nantista RF distribution system for the 8-pack project
Toshi Higo KEK activities for high power tests
Steffen Doebert More detailed discussion on structure high power tests
Marc Ross Acoustic sensor for breakdown studies
Juwen Wang Discussion on H-type structure tests
Valery Dolgashev Power limit of RF breakdowns
Valentin Ivanov Dark current simulation
Kenji Ueno Fabrication status of single cell TW and SW for high field experiments (Y. Higashi)
Discussion topics:
Understanding of field limit, power limit, Vg, and other parameters
Difference between HDS and HDD
Damage analysis after high power tests
Collaboration issues in test program and facilities

Wednesday, 6/18

9:00 – 12:30 Structure Design and Simulation R1 issues

Zhenghai Li Parameter choices
Roger Jones Wakefield estimation
Nikolay Solyak Coupler design
Toshi Higo H60VG3K1 coupler design (A. Lounine)
Yuichi Morozumi Frequency sensitivity calculation
Discussion topics:
Clarification of R1 goal
H60VG3S17 detailed design issues: tables, in/out couplers, HOM couplers
H60VG3S17 fabrication, schedule and work divisions


   13:30 – 15:30 Structure Design and Simulation - R1 issues

Continued discussion.

 16:00 - 17:30 Plenary (Machine Operation and Availability)

 18:30 BBQ Dinner

Thursday, 6/19

9:00 – 12:00 Structure Design (joint with Accelerator Design Group)

Zhenghai Li Structure parameter optimization
        *Discussion topic: Cavity design: round top, thin slots and manufacturability
Gordon Bowden Fabrication tolerances and model Roger Jones Wakefield calculation
       *Discussion topic: Frequency control and tolerances
Tor Raubenheimer Alignment tolerances
       *Discussion topic: Alignment tolerances
Discussion topics:
R2 issues: goal, path and time frame.

    13:30 – 15:00 Fabrication and Structure Preparation

Kenji Ueno Report on structure fabrication at KEK
Tug Arkan Report on structure fabrication at Fermi Lab
Discussion topics:
Machining and QC measurements
Cleaning and handling, Surface processing.
Bonding & brazing, vacuum & H2 furnaces

    16:00 – 17:30 Plenary (Collaboration Plans for 2004)

Friday, 6/20 9:00

    11:00 Accelerator Technology Development

Jim Lewandowski Bead-pulling studies
Nicoleta Baboi Wire measurement
Rich Li Dipole wakefield simulation

    13:30 – 14:30 Close Out