Beams Document 1427-v2

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Bunching for Shorter Damping Rings for the ILC

Document #:
Beams-doc-1427-v2
Document type:
Note
Submitted by:
David V Neuffer
Updated by:
David V Neuffer
Document Created:
28 Oct 2004, 11:02
Contents Revised:
09 Nov 2004, 15:27
Metadata Revised:
09 Nov 2004, 15:27
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Abstract:
A variant rearrangement of the bunch trains for the ILC that enables much shorter damping rings is presented. In a particular example the ~2280 bunches are regrouped into ~450 subtrains of five adjacent bunches. These subtrains are extracted from the damping rings at ~2.2 ms intervals, obtaining the 1ms macrobunch length of the baseline TESLA collider scenario. If the baseline damping rf frequency is 325 MHz and the kicker rise and fall times are ~20 ns, a ring circumference of ~4.5km is required. Variations of the scheme could easily reduce the circumference to ~3km, and faster kickers could reduce it even further.
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Keywords:
TESLA ILC damping_ring
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