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Tests of Low Emittance Tuning Tool

Low Emittance Tuning : corrects simultaneously orbit (y) , dispersion (η) , and coupling (ORM) using vertical correctors (θ) and skew quadrupoles (k) . Measurements at Diamond evidenced small dispersion, coupling and beam size:. Tests of Low Emittance Tuning Tool.

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Tests of Low Emittance Tuning Tool

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  1. Low Emittance Tuning: corrects simultaneously orbit (y), dispersion (η), and coupling (ORM) using vertical correctors (θ) and skew quadrupoles (k). Measurements at Diamond evidenced small dispersion, coupling and beam size: Tests of Low Emittance Tuning Tool Vertical Dispersion rms during correction reiteration DY≈ 600 μm Coupling0.24% Vertical Dispersion rms [m] Iteration Number Beam size at Pinholes

  2. LET at SLS • 1st it. Skew. Only dispersion free steering. Beam V size from 15 to 10 um Dispersion from 3 to 2 mm rms • 2nd it. Skew+Vertical. • 3rd it. Vertical. Very big orbit. No improvements have been observed in the two last iterations. Next Steps: 1) Improve I/O for more iterations (~50) 2) Separate tests for Skew and Vert Cor. 3) try to correct without feedback, constraining also the orbit. 4) test tilt estimation

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