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EMMA commissioning workshop 1-4 December 2009

EMMA commissioning workshop 1-4 December 2009. Shinji Machida STFC/RAL/ ASTeC 9 December 2009. EMMA. Electron model of muon acceleration Electron model of many applications It will be the first nonscaling FFAG. Tune is not constant Orbits are not similar for different momentum.

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EMMA commissioning workshop 1-4 December 2009

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  1. EMMA commissioning workshop1-4 December 2009 Shinji Machida STFC/RAL/ASTeC 9 December 2009

  2. EMMA • Electron model of muon acceleration • Electron model of many applications • It will be the first nonscaling FFAG. • Tune is not constant • Orbits are not similar for different momentum.

  3. 16 m circumference ring

  4. Goals (initial)

  5. Schedule

  6. Objectives of the workshop

  7. Procedure (1)

  8. Procedure (2) • Homework to make more details procedure. • Which energy we choose on Day 1? • 10 to 12 MeV is natural assumption, but aperture is more limited. • 17 MeV gives enough aperture in transverse as well as longitudinal.

  9. Injection and extraction (1) • Septum stray fields and kicker ringing cause orbit distortion. • Is it harmful?

  10. Online model and control system (1) • EPICS based control system. • Zgoubi was chosen as online model. • PyZgoubi (Tygier) makes interface. • Real machine and online model can be run side by side.

  11. Online model and control system (2) • Development of high level software • Orbit correction. • Tune measurement.

  12. Diagnostics and rf (1) • Synchronization between ALICE injector and EMMA seems still unsolved problem. • ALICE rf is 1.3 GHz whereas EMMA is 1.3+a GHz.

  13. Measurements (1) • Tune measurement • Cell tune measurement from different BPMs. • Reconstruct phase advance from response matrix. • Time of flight measurement • Measure interval of differential BPM signal. • Orbit measurement and correction. • Correction in FFAG is restoring symmetry?

  14. My personal summary • Many things (not theoretical, but more practical) have to be done in next three months. • Write detailed procedures. • Make high level software. • Imagine you are in front of console and things do not work as expected. • Very unique accelerator which is only for development purpose, not for users.

  15. If you want to know more • http://www.conform.ac.uk/documents/emma/rev-reviews/commissioning-workshop-dec-09/talks.zip

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