| Title |
Correction of the Higher Order Dispersion for Improving Momentum Acceptance |
| Authors |
- M. Takao, K.K. Kaneki, Y. Shimosaki, K. Soutome
JASRI/SPring-8, Hyogo-ken, Japan
|
| Abstract |
May 2013 we lowered the emittance of the SPring-8 storage ring from 3.5 nm¥cdotrad to 2.4 nm¥cdotrad to enhance the brilliance. At the optics change the momentum acceptance shrunk from 3.2 ¥% to 2.4 ¥%. Then, by carefully correcting the second order dispersion, we recovered the momentum acceptance up to 2.8 ¥%, which results in doubling the Touschek beam lifetime. Although the injection efficiency decreased by more than 10 ¥% by the dispersion correction, we restored it by means of suppressing the amplitude dependent tune shift. Here we describe these improvements of the nonlinear dynamics of the SPring-8 storage ring.
|
| Paper |
download THPRO066.PDF [1.408 MB / 3 pages] |
| Export |
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| Conference |
IPAC2014, Dresden, Germany |
| Series |
International Particle Accelerator Conference (5th) |
| Proceedings |
Link to full IPAC2014 Proccedings |
| Session |
Poster Session, Ronaldo Area |
| Date |
19-Jun-14 16:00–18:00 |
| Main Classification |
05 Beam Dynamics and Electromagnetic Fields |
| Sub Classification |
D02 Non-linear Dynamics - Resonances, Tracking, Higher Order |
| Keywords |
optics, storage-ring, electron, emittance, betatron |
| Publisher |
JACoW Publishing, Geneva, Switzerland |
| Editors |
Christine Petit-Jean-Genaz (CERN, Geneva, Switzerland); Gianluigi Arduini (CERN, Geneva, Switzerland); Peter Michel (HZDR, Dresden, Germany); Volker RW Schaa (GSI, Darmstadt, Germany) |
| ISBN |
978-3-95450-132-8 |
| Published |
July 2014 |
| Copyright |
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