US Workshop

on High Gradient Research

for Multi-TeV Linear Colliders


July 11-12, 2005

Stanford Linear Accelerator Center



Organizers:   Professors Ronald Ruth and Sami Tantawi

Scientific Secretary:  Dr. Christopher Nantista


Contact HG Collaboration:





Monday, July 11, 2005


08:00 a.m.      coffee

08:30 a.m.      Welcome and Charge                                                J. Dorfan        SLAC  (15)

08:45 a.m.      DOE Perspective                                                       P. Debenham DOE    (10)

08:55 a.m.      Workshop Introduction                                            R. Ruth           SLAC (15)

09:10 a.m.      SLAC Experience (Summary)                                  C. Adolphsen SLAC (30)

09:40 a.m.      CERN Experience (Summary)                                 E. Jensen        CERN (30)

10:10 a.m.      Problem Definition                                                   S. Tantawi       SLAC (20)

10:30 a.m.      coffee break                                                                                                   (20)

10:50 a.m.      The MIT Program of High Gradient

Accelerator Research                                               R. Temkin       MIT     (20+10)

11:20 a.m.      High-Power 30 GHz Gyrotron

Amplifier Development at CPI                                M. Blank         CPI      (20+10)

11:50 a.m.      Using the University of Maryland Gyroklystron

Facility to Test and Condition High-Gradient

Components from X-band to W-band                     W. Lawson     UMD (20+10)

12:20 p.m.      lunch                                                                                                               (70)

01:30 p.m.      Results from CCR’s 30 GHz Gyroklystron

Program                                                                     L. Ives             CCR    (20+10)

02:00 p.m.      Basic Breakdown Studies at X- and Ka-bands.

Construction of 30 GHz, 50 MW Stand-Alone

RF Source for Conditioning and Testing

Accelerator Structures                                             J. Hirshfield   Yale    (30+10)

02:40 p.m.      30 GHz RF Power Sources                                      D. Sprehn       SLAC (20+10)

03:10 p.m.      break                                                                                                               (30)

03:30 p.m.      Development and Testing of Advanced

Accelerator Structures and Technologies

at 11.424 GHz                                                           S. Gold           NRL    (20+10)

04:00 p.m.      ANL Research Activities on Future High

Gradient Accelerators                                              W. Gai            ANL    (20+10)

04:30 p.m.      A Proposal About ATF Capabilities                        V. Yakimenko BNL   (20+10)

05:00 p.m.      Theory and Simulation of RF Breakdown

Design and Beam Dynamics of Drive Beam

Manipulation Materials for Reaching Higher

Breakdown Threshold                                               J. Byrd            LBNL (30+10)

05:40 p.m.      discussion and planning                                                                                (20)

07:00 p.m.      dinner            



Tuesday, July 12, 2005


08:00 a.m.      coffee

08:30 a.m.      Development and High Power Evaluation of

a Gradient Hardened Linac Structure                      J. Haimson     HRC    (20+10)

09:00 a.m.      Single Cell TW Accelerator Structures and

Waveguide Experiments at SLAC                            V. Dolgashev SLAC (20+10)

09:30 a.m.      High Gradient RF Studies                                         J. Norem        ANL    (20+10)

10:00 a.m.      coffee break                                                                                                   (20)

10:30 a.m.      Possible Studies Around KEK on

Higher Gradient                                                         T. Higo           KEK    (10)

10:40 a.m.      Theory of RF Breakdown in Accelerating

Structures                                                                   P. Wilson       SLAC  (20)

11:00 a.m.      RF Breakdown Simulations                                      J. Cary            Tech-X(20+10)

11:30 a.m.      Theory and Modeling of Limiting Factors

in High-Gradient Accelerating Structures              G. Nusinovich UMD (10+5)

11:45 a.m.      lunch                                                                                                               (60)

12:45 p.m.      tour of Klystron Test Lab and NLCTA                                                        (75)

02:00 p.m.      Research on Innovative Approach to

High-Gradient Acceleration                                     M. Shapiro     MIT     (10+5)

02:15 p.m.      Experimental Testing and Facilities at SLAC         S. Tantawi       SLAC (30)

02:45 p.m.      general discussion                                                                                         (30)

03:15 p.m.      break                                                                                                               (15)

03:30 p.m.      Summary and

Discussion of Organization and Governance          R. Ruth           SLAC (90)

05:00 p.m.      departure



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