Workshop on Linac Operation with Long Bunch Trains

chaired by Nicholas Walker (DESY), Siegfried Schreiber (DESY), John Carwardine (Argonne)
from to (Europe/Berlin)
at DESY ( Sem. R. 2, Bldg. 3 )
Notkestr. 85 22607 Hamburg
Description

The corner stone of the TESLA superconducting linear accelerator technology is the ability to accelerate long bunch-trains at relatively high currents in pulsed operation. This workshop follows on from the first one held in February 2010. The ILC 9mA programme remains a central theme of the workshop, but in keeping with the broader issues of the challenges of operations with long bunch-trains and the spirit of the first meeting, this workshop will also focus on specific issues relevant to FLASH VUV-FEL and future European XFEL operations.

Unlike the first workshop, this meeting will be entirely plenary with no parallel working groups. The time will be divided into six thematic sessions:

  1. Results and analysis from the 9mA studies
  2. Toward future 9mA studies
  3. Operations modes for FLASH2
  4. Feedback and control of longitudinal phase space
  5. Machine protection for long bunch-train operation
  6. Beam-based feedback systems

Description of the scope of these themes can be found under Scientific Programme.

Material:
Support Email: swaantje.mette@desy.de
Go to day
  • Monday, June 6, 2011
    • 14:00 - 15:30 Opening Session
      • 14:00 Welcome address 10'
        Speaker: Dr. Nicholas Walker (DESY)
      • 14:10 Scope and goals for the workshop 20'
        Speaker: John Carwardine (Argonne)
        Material: Slides powerpoint file
      • 14:30 Long bunch train operations at FLASH 40'
        Speaker: Dr. Holger Schlarb (DESY)
        Material: Slides powerpoint file
      • 15:10 The February 2011 9mA studies in an nutshell 15'
        Speaker: Dr. Nicholas Walker (DESY)
        Material: Slides powerpoint file
    • 15:30 - 16:00 coffee
    • 16:00 - 18:00 9mA studies analysis and results
      • 16:15 Detuning compensation studies, detuning calculations 20'
        Speaker: Dr. Mariusz Grecki (DESY)
        Material: Slides pdf file
      • 16:35 Results from the 'S1-Global' cryomodule tests at KEK 20'
        Speaker: Dr. Shinichiro Michizono (KEK)
        Material: Slides powerpoint file
      • 16:55 Vector Sum calibration in closed loop 10'
        Speaker: Mr. Sven Pfeiffer (DESY)
        Material: Slides pdf file
      • 17:05 Photon science with long bunch-trains 20'
        Speaker: Dr. Rolf Treusch (HASYLAB at DESY)
        Material: Slides pdf file
      • 17:25 Discussion 20'
  • Tuesday, June 7, 2011
    • 09:00 - 10:30 Feedback control of longitudinal phase space
      • 09:00 BAM electronics & software developments 20'
        Speaker: Mr. Patrick Gessler (DESY)
        Material: Slides pdf file
      • 09:20 Beam based FB implementation with SimconDSP and uTCA LLRF controllers 20'
        Speaker: Mr. Wojciech Jalmuzna (DESY)
        Material: Slides pdf file
      • 09:40 Results on BAM studies 20'
        Speaker: Marie Bock (DESY)
        Material: Slides pdf file vid1 unknown type file vid2 unknown type file
      • 10:00 Beam stabilization with MIMO controller and BBF 20'
        Speaker: Christian Schmidt (DESY)
        Material: Slides pdf file
      • 10:20 Discussion 10'
    • 10:30 - 11:00 coffee
    • 11:00 - 12:30 Feedback control of longitudinal phase space
      • 11:00 LLRF Front-end server implementation of BBF 20'
        Speaker: Olaf Hensler (DESY)
        Material: Slides pdf file
      • 11:20 Slow DAQ based long. feedback architecture 20'
        Speaker: Mr. Raimund Kammering (Deutsches Elektronen-Synchrotron Hamburg)
        Material: Slides powerpoint file
      • 11:40 Stability of photoinjector and impact of BBO crystal 20'
        Speaker: Sebastian Schulz (DESY)
        Material: Slides pdf file
      • 12:00 Discussion 30'
    • 12:30 - 14:00 lunch
    • 14:00 - 15:30 9mA studies analysis and results
      • 14:00 Energy regulation performance with beam loading 15'
        Speaker: Mr. Christian Schmidt (DESY)
        Material: Slides pdf file
      • 14:15 Investigation of individual cavity field stability and slopes on vector sum regulation 15'
        Speaker: Wojciech Cichalewski (TUL-DMCS)
        Material: Slides pdf file
      • 14:30 Gradient flatness studies results and analysis 20'
        Speaker: Dr. Gustavo Cancelo (Fermilab)
        Material: Slides powerpoint file
      • 14:50 Analysis of piezo sensor signals and their correlation to detuning 15'
        Speaker: John Carwardine (Argonne)
        Material: Slides powerpoint file
      • 15:05 Discussion 20'
    • 15:30 - 16:00 coffee
    • 16:00 - 17:30 9mA future studies
      • 16:00 Priorities and desired results from the next 9mA studies 15'
        Speaker: John Carwardine (Argonne)
        Material: Slides powerpoint file
      • 16:15 Planned LLRF upgrades 20'
        Speaker: Frank Ludwig (DESY)
        Material: Slides pdf file
      • 16:35 Parameter space for Pk/Ql studies at 6mA and high gradients 20'
        Speaker: Dr. Gustavo Cancelo (Fermilab)
        Material: Slides powerpoint file
      • 16:55 Proposed RTML studies at FLASH 15'
        Speaker: Nikolay Solyak (Fermilab)
        Material: Slides pdf file
      • 17:10 Discussion 20'
    • 18:30 - 21:30 Workshop Dinner ( DESY Bistro )
  • Wednesday, June 8, 2011
    • 09:00 - 10:30 Machine Protection
      • 09:00 XFEL (FLASH2) MPS system 20'
        Speaker: Dirk Noelle (DESY)
        Material: Slides powerpoint file
      • 09:20 FLASH Beam Loss Monitor System 20'
        Speaker: Dr. Alexander Kaukher (DESY)
        Material: Slides pdf file
      • 09:40 FLASH MPS Philosophy 20'
        Speaker: Dr. Siegfried Schreiber (DESY)
        Material: Slides powerpoint file
      • 10:00 Discussion 30'
    • 10:30 - 11:00 coffee
    • 11:00 - 12:30 Concurrent operation modes for FLASH1 and FLASH2 Beamlines
      • 11:00 Overview of the FLASH2 Project 15'
        Speaker: Bart Faatz (DESY)
        Material: Slides powerpoint file
      • 11:15 LLRF options and tests 20'
        Speaker: Dr. Valeri Ayvazyan (DESY)
        Material: Slides powerpoint file unknown type filedown arrow
      • 11:35 Timing issues 20'
        Speaker: Mr. Patrick Gessler (DESY)
        Material: Slides pdf file
      • 11:55 Kicker stability and flatness measurements 15'
        Speaker: Frank Obier (DESY)
        Material: Slides powerpoint file
      • 12:10 Discussion 20'
    • 12:30 - 14:00 lunch
    • 14:15 - 15:30 9mA future studies
      • 14:15 Reaching higher average gradients for 9mA studies 20'
        Speaker: Dr. Nicholas Walker (DESY)
        Material: Slides powerpoint file
      • 14:35 Proposed Pk/Ql studies at NML (via webex) 20'
        Speaker: Mr. Brian Chase (FNAL)
        Material: Slides pdf file
      • 14:55 Lorentz-force detuning compensation using Least-Squares optimization (via webex) 15'
        Speaker: Yuriy Pischalnikov (Fermilab)
        Material: Slides pdf file
      • 15:10 Discussion 20'
    • 15:30 - 16:00 coffee
    • 16:00 - 17:00 Closing session
      Summaries and further planning.