Beams Document 3416-v1

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Alignment Tolerances for Booster Correctors

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Eric J Prebys
Updated by:
Eric J Prebys
Document Created:
24 Jun 2009, 10:16
Contents Revised:
24 Jun 2009, 10:16
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24 Jun 2009, 10:16
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This note examines the effect of misalignment of the new correctors in the Fermilab Booster. Both lateral offset and angle (pitch, yaw) are considered. It is found that incoherent alignment errors on the order of 3 mm will result in closed orbit distortions of less than 1 mm and manageable tune shifts. Systematic alignment errors should be kept below a millimeter. Correctors are insensitive to angular errors well beyond any that could conceivably occur during installation.

Roll tolerances are discussed briefly. The Booster is a highly coupled machine by nature, so arguments involving tune coupling are difficult. An alignment of better than 10 milliradians will keep the dipole coupling below 1%.

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