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Beam steering capability for target position uncertainty Simon Yu & Enrique Henestroza Lawrence Berkeley National Laboratory ARIES Meeting October 3, 2002.

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Presentation on theme: "Beam steering capability for target position uncertainty Simon Yu & Enrique Henestroza Lawrence Berkeley National Laboratory ARIES Meeting October 3, 2002."— Presentation transcript:

1 Beam steering capability for target position uncertainty Simon Yu & Enrique Henestroza Lawrence Berkeley National Laboratory ARIES Meeting October 3, 2002 PPPL

2 Steering in Heavy Ion Drivers 3 kinds of steering in drivers: 1.Slow (or DC)-dipoles - centroid correction (shot-to-shot reproducible errors) 2.Fast Correctors (  s to tens of ns) - head to tail variations (shot-to-shot reproducible errors) 3.Pulsed correctors (~ms) (shot-to-shot variable errors) Steering Capability for Target Position Uncertainty belongs to the 3rd class. Requirements: -Respond in 25ms (target injection at 200m/s) -Correction of a few mm (< ± 2mm)

3 Sample dipole corrector layout for final focus

4 First Beam through NTX Magnetic Transport (August 2002) NTX with source tank, 4 pulsed quadrupoles, and diagnostic tank In Bldg. 58, LBNL voltage current 5cm Current at magnet exit Profile at magnet exit

5 Test Stand for Measurement of Transient Magnetic Field Three-way B probes (B x, B y and B z ) B(t) B Overlay of B(t) in 4 quadrants and I(t) Axial profile (measurement vs. ANSYS)

6 First Beam through Neutralized Drift Section with Plasma Plug Magnetic section Pulsed arc plasma source Drift tube Scintillating glass Spot size with plasma Spot size without plasma

7 Dipole corrector Requirements are very easy to meet Required: Pulsed dipoles ~ 1kG in < 25msec Achieved: NTX quadrupoles ~ 7kG in 1 msec

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