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MTE action plan - what is foreseen in 2011?

MTE action plan - what is foreseen in 2011?. Recap of 2010 situation and studies Mitigation measures Studies in 2011. M. Giovannozzi. Recap of 2010 situation and studies. The effects that blocked MTE operation in 2010 Activation of septum 16 Generated by longitudinal bunch structure

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MTE action plan - what is foreseen in 2011?

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  1. MTE action plan - what is foreseen in 2011? • Recap of 2010 situation and studies • Mitigation measures • Studies in 2011 M. Giovannozzi MG - collaboration meeting 16/02/2011

  2. Recap of 2010 situation and studies • The effects that blocked MTE operation in 2010 • Activation of septum 16 • Generated by longitudinal bunch structure • Impact on cool down time for intervention in septum area • Fluctuation of trapping efficiency in the PS • Long campaign of beam measurements to find source (not yet identified) • Huge amount of beam data analysed (already) and to be analysed. • Injection trajectories fluctuations in SPS MG - collaboration meeting 16/02/2011

  3. Implementation of MTE Sext/oct Sext/oct IPAC'10 - May 27th 2010

  4. Activation of septum 16: dummy septum - I • Dummy septum • Considerable progress since MTE workshop in terms of simulations of activation MAG16 MAG15 Courtesy S. Damjanovic • SS15 • new shielding • MAG15 • MAG14 • new shielding MG - collaboration meeting 16/02/2011

  5. Activation of septum 16: dummy septum - II • Dummy septum • In principle, it provides a reduction acceptable for RP. • Improvement of the radiation released outside the tunnel due to the corridor in front of the tunnel • Linac3 radiation field to be revised • Relocation of DHZ15 and gamma-jump quadrupole to be studied. MG - collaboration meeting 16/02/2011

  6. Activation of septum 16: using electrostatic septum - I MG - collaboration meeting 16/02/2011

  7. Activation of septum 16: using electrostatic septum - II • New extraction scheme • Re-use the electrostatic septum and the BFAs. • Hardware: HV cable connection improved to allow quick polarity change (about 1 hour tunnel intervention, only) for MTE kickers. • The CT elements remain untouched: always possible to use the CT during the new extraction tests. • PPM performance of CT elements not optimal: it will be better to perform these tests before physic starts. SEH31 MG - collaboration meeting 16/02/2011

  8. Analysis of MTE performance in May Sample data: PS - PRELIMINARY MG - collaboration meeting 16/02/2011

  9. Schedule of studies in 2011 SPS physics starts with CT MG - collaboration meeting 16/02/2011

  10. Schedule of studies in 2011 - I • New extraction • Polarity of KFA21 is set for new extraction tests. • With a single bunch beam, low intensity: • Test the possibility to generate a fast bump around SEH31 using CT and MTE kickers. • Kick the bunch in an island and test the fast bump simulating a beamlet. • X, X’ measurements from the CODD system. Any tool already available is more than welcome! MG - collaboration meeting 16/02/2011

  11. Kickers and islands KFA4 KFA9 KFA21 The extraction kicker has the right phase to kick the bunch inside the island KFA45 KFA71 MG - collaboration meeting 16/02/2011

  12. Schedule of studies in 2011 - II • Nominal extraction (search for fluctuations) • Check the closure of the slow bump (we know that it is closed on the core and it might be not completely closed for the beamlets): • Kick a bunch in the island with KFA71 and measure the turn-by-turn position to: • Check bump closure • Check stability of extraction conditions • Check extraction position vs injection B-field • Vary bumpers to improve closure (if needed) • Similar measurement for the fast bump will be more difficult…and will need to change the polarity of KFA21. Hence, to be done not before the first injectors’ technical stop (end of March). MG - collaboration meeting 16/02/2011

  13. Schedule of studies in 2011 - III • Trapping fluctuations (it needs a high-intensity multi-bunch beam) • Check impact of POPS on trapping fluctuations • Study correlation of fluctuations with • B-field at injection (last year’s measurements were obtained with faulty ADC on FMR acquisition…) • Tune curve (already done, but to be re-tested more carefully) • No PWF (already done, but profiles not clean) MG - collaboration meeting 16/02/2011

  14. Schedule of studies in 2011 - IV • Resuming injection into the SPS (new or old extraction scheme) • Steering in TT2/TT10, SPS injection • Study of stability of trajectories • Optics measurements (and re-matching?) • Global setting up in the SPS • Study relocation of gamma-jump quadrupole • Measurements: setting to zero the branch including the element in SS15 • Paper study MG - collaboration meeting 16/02/2011

  15. Tasks and organisation • No rigid limit to contributions, but it is proposed: • Simone, Myriam, Massimo: PS studies (data taking and analysis). • Antoine: cross-check, improvement, development of tools for steering correction, data analysis (dispersion and beta-function measurements) and re-matching of TT2/TT10. • Hannes, Yannis: SPS studies (injection and beam setting up) and gamma-jump analysis. • Organisation • Effective meetings (bi-weekly) to exchange progress. MG - collaboration meeting 16/02/2011

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