DESY-Fermilab LLRF workshop of Feb 9-10 at Fermilab

Organizing Committee:

Helen Edwards (FNAL)

Sergei Nagaitsev (FNAL)

Stefan Simrock (DESY)

Kay Rehlich (DESY)

Brian Chase (FNAL)

Ruben Carcagno (FNAL)

Gustavo Cancelo (FNAL)

Goals of the workshop:

  • To develop a strategic approach for the development of the LLRF systems such to allow for evolution of both hardware and software as ideas and technology mature.
  • Review present or presently under consideration systems and components in terms of their pluses and minuses, status, work to be done, and future directions.
  • Define complete topologies of the LLRF systems for the ILC and for the XFEL. These topologies must consider alternative paths, define R&D, and plan how to meet the specifications.

The workshop will focus on LLRF hardware components and specifications.Talks are welcomed but at least half of each session’s time will be used for general discussion and hands on work.

Workshop deliverables: Organize collaborations discussing how everything will evolve.

Define a strategic approach for the LLRF.

Meeting Room:

Fermilab, Wilson Hall, Racetrack room, 7 floor crossover.

Very Important:

Please confirm attendance as soon as possible specifying if you will be attending in person or via videoconference.

Contact: Gustavo

Please limit all presentation time to 10 minutes to allow for questions and discussions.

Connecting by video:

We will use the ECS IP video system. It requires that everybody connecting by video does it with registered equipment. If you need to register your equipment please follow the instructions in Once registered the procedure to join a meeting by video is very simple, the collaboration must come up with a number and everybody calls the same number. The bridge makes the appropriate linking. The number to connect is 88LLRF (885573).

If you have questions regarding your video connection, please contact SheilaCisko ()

Connecting by Webex:

Webex will be available. People should look at and browse meetings. Click on the LLRF meeting and request to join. The password is “fermilab”.

We will not be using the audio capabilities for this meeting, so to hear what’s going on, you still need to make the video connection.

Note that we are allowed only 15 webex connections per meeting. People at the same facility should try and collect together in a single meeting room.

Workshop dinner:

There is going to be a casual dinner on Thursday Feb. 9th at 7pm at Fantastico Restaurant in Batavia. The menu includes: Italian appetizers (antipasto), pasta, chicken parmigiana, coffee, up to two glasses of wine or beer per person, soft drinks. The cost of the dinner is $30 per person, includes gratuity and taxes. Please let us know if you have dietary restrictions.

Fantastico Italian Cuisine

Address: 102 N. River, Batavia, IL

Phone: 630-879-5900

Companion Program

The Cultural Association of Italians at Fermilab, along with the Instituto Italiano di Cultura di Chicago is proud to present one of the stars of Lyric Opera, Basso-Baritone Andrea Silvestrelli, along with Soprano Teresa Cullen, and accompanied by Eric Weimer on piano. The recital, which includes works by Mahler, Ravel, Tosti, and others, will take place in Ramsey Auditorium on Wednesday, Feb. 8, beginning at 8 p.m. For tickets please call (630) 840-2787.

Agenda:

FEB 9: Starts 8am

  • Introduction. Scope of the workshop (Helen Edwards 10 min + 10 min discussion)
  • Summary of RF specifications from Jan 17 workshop at FNAL. (Sergei Nagaistev) 10 min + 20 min discussion)
  • What specs are clear, what needs more R&D, what coefficients are hard to spec and we need to apply the “best you can do” concept?
  • What specs can be expected to improve with technology advances?
  • LLRF around the world: 5 min summary of activities and plans from workshop participants + 5 min each for questions
  • DESY (Tomas Jezynski SIMCON 3.1 performance)
  • KEK: (S. Michizono)
  • SNS
  • LBL
  • SLAC
  • UPENN
  • JLAB
  • FNAL

10:00– 10:15Coffee break

  • LLRF architectures at the block diagram level. (2hs 30min) (chair: Stefan Simrock)
  • Identify major components and alternatives.
  • Is the LLRF architecture of the BC different from the main Linac?
  • Work on a top hierarchy block diagram and alternatives.
  • Identify different components (requirements) for different projects.
  • Define interfaces with other accelerator systems.
  • Identify possible standardization with other accelerator systems.
  • High availability software, fault detection and recovery.
  • Talks:
  • Larry Doolittle
  • John Cawardine
  • Kay Rehlich
  • Tomas Jezynski: LLRF System architecture
  • Jim Kowalkowski (fault tolerant software for high availability)

12.45 – 14:00 Lunch

  • LLRF Measurements (1hr 15 min) (chair Elmar Vogel)
  • What do we need to measure to define (refine) LLRF specs?
  • Define all measurements and inputs to the LLRF system.
  • Define resolutions, noise levels, bandwidths, etc
  • Electronics in moderate radiation areas, TID, SEU.
  • Beam based phase calibration from HOMs are BPMs?
  • Talks:
  • Brian Chase (on noise levels, etc)
  • Elmar Vogel (DESY plan)
  • Alexander Brandt (Vector sum calibration)

15:15 – 15:30 Coffee break

  • Sensors and Actuators (1hr 30 min) (chair: Ruben Cracagno)
  • Piezo tuners, mechanical and 3-stub tuners. Phase shifters.
  • Integration with piezo control.
  • What other R&D is needed in this field?
  • Talks:
  • Bill Foster
  • Ruben Carcagno

End of 1st day workshop diner7pm

FEB 10: Starts 8am

  • Fast Control (1hr 15 min) (chair Gustavo Cancelo)
  • Identify all possible loops and their dynamics.
  • What algorithms are better suited for FPGA speed?
  • What algorithms are better suited for processors in terms of needed precision (floating point)?
  • Beam feedback.
  • Talks:
  • Larry Doolittle
  • Stefan Simrock
  • Mariusz Grecki: IQ detection
  • Hardware standards (1 hr) (chair: Brian Chase)
  • Comparative analysis pointing pros and cons, including high availability issues, cost, probability that the standard can be used for a high quality instrumentation system, etc.
  • When to choose hardware forthe final design?
  • How to guarantee 20+ years of lifetime? Quality control.
  • Talks:
  • Kay Rehlich
  • Brian Chase
  • Tomas Jezynski: Proposal for upgrade features for SIMCON 3.1
  • Matsumoto: LLRF hardware for KEK-STF

10:30 – 10:45 Coffee break

  • Hardware implementations (1 hr 45 min)
  • LLRF controller. 10 min presentations on new ideas, 10 min presentations on available COTS options.
  • Master oscillator.
  • Timing and distribution system.
  • John Byrd, LBNL: RF and timing distribution
  • Multichannel downconverters.
  • Work on proposals at the block diagram level.
  • Talks:
  • Larry Doolittle
  • TBD on summary of workshop at SLAC.
  • TBD on DESY running an industrial study for fab. and commissioning.

12.30 – 14:00 Lunch

  • Real time simulator (1 hr) (chair Nigel Lockyer)
  • Purpose of having a real time simulator.
  • Goals and schedule
  • Hardware implementation.
  • Talks:
  • UPENN simulator
  • Ted Zmuda or Gustavo Cancelo FNAL simulations
  • Open session and workshop conclusion (2 hr) (chair: ??)
  • This session will continue the discussion on specific items that needed to be cut short to fit the schedule above.
  • Workshop conclusion

End of workshop

Extra credit activity

We will use the morning of FEB 11 to write a document with specifications, architectures, and collaboration plans.