Turn-around%20after%20DR?%2020050825%20Kiyoshi%20Kubo - PowerPoint PPT Presentation
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Turn-around%20after%20DR?%2020050825%20Kiyoshi%20Kubo
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Unless stable extraction from DR is guaranteed. ... Dogbone, Upstream. 0. 0. Downstream of Linac. Beam Line. Tunnel. DR Layout. DR (6 km) DR (6 km) ... – PowerPoint PPT presentation
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Title: Turn-around%20after%20DR?%2020050825%20Kiyoshi%20Kubo
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Turn-around after DR? 20050825 Kiyoshi Kubo
- Conclusion YES.
- Unless stable extraction from DR is guaranteed.
- Required Relative Kicker stability 7E-4
(TESLA-TDR). - Lengths of additional beam line and tunnel depend
on DR layout. (see last two slides.)
2
Input from WG1
- It will help to reduce beam jitter by
feed-forward - In particular bunch-to-bunch jitter
- Strongly recommended
3
Additional Cost for turn-around
DR Layout DR Layout Tunnel Beam Line
Downstream of Linac Downstream of Linac 0 0
Dogbone, Upstream Dogbone, Upstream 0 1 km
Circular (6 km), Upstream A 1km 1 km
Circular (6 km), Upstream B 0 3.5 km DR length/2 0.5 km
4
Case B
Case A
Extraction arc from DR ( 3.5 km)
Signal line for feed-forward ( 2.5 km)
DR (6 km)
DR (6 km)
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