Summary of Commissioning and Tuning session Philip Bambade LAL-Orsay 5 th ATF2 project meeting KEK, 21 December 2007.

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Presentation transcript:

Summary of Commissioning and Tuning session Philip Bambade LAL-Orsay 5 th ATF2 project meeting KEK, 21 December 2007

Agenda 1.Using TBT data at ATF DR 2.Extraction line + Final Focus System beam- based alignment and IP spot-size tuning 3.Orbit Control and beam-based feedback in EXT and FFS Studies 4.ATF2 as a test bench for CLIC BDS tuning, also 5.Expected ground motion at ATF2 and resulting effects at IP 6.Vertical emittance growth due to non-linearity in the ATF EXT 7.Emittance measurements with multiple wire- scanners and quadrupole 8.Intermediate beta configurations at the IP for commissioning and optimisation Eliana Wendt (FNAL) Glen White (SLAC) Rogelio Thomas (CERN) Yves Rénier (LAL) Maria Alabau (IFIC / LAL) Julien Brossard (LAL) Cécile Rimbault (LAL) Sha Bai (IHEP / LAL)

GM + other jitter  IP stability feedback & tuning  Feedback within Shintake scans ? Assumes 1 nm size resolution from Shintake !

ATF EXT emittance investigation  Must make sure this won’t limit ATF2 !

First results with bump in QM7 Learning control room work  will continue more systematically in 2008

Investigate emittance reconstruction methods: 1.Multiple wire scanners   2 minimisation (constraints ?) 2.Combine normal + skew quad scans  reliable xy coupling ?  Dedicated schemes for flat beams (error analysis…)  Develop practical tools for efficient control room work

1.Increasing  y  gradual approach with looser tolerances 2.Reducing  y  enhanced performance 3.Idem at Honda-monitor and wire-scanner locations  Check magnet variation ranges