| Paper |
Title |
Page |
| THPMN045 |
Design and Control of Emittance Growth of Short Bunch Compressor for International Linear Collider
|
2814 |
| |
- E.-S. Kim
Kyungpook National University, Daegu
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We present an alternative design with the short system length in the bunch compressors for the International Linear Collider(ILC). We show the characteristics and performances of the designed system in detail. We also present orbit and dispersion correction schemes for the compensation of emittance growths, vertical dispersion and skew-component that may be generated by several machine errors in the system. In result, it is shown that the short bunch compressor system satisfies the required beam conditions for the ILC.
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| FRPMN037 |
Ion Instability in the ILC Damping Ring
|
4030 |
| |
- E.-S. Kim
Kyungpook National University, Daegu
- K. Ohmi
KEK, Ibaraki
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Ions created by electron beam trapped in a bunch oscillate with a certain frequency, with the result that the beam oscillate with the same frequency. Recent high intensity and low emittance rings, the growth rate of this ion instability is very rapid. Super B factory and ILC damping ring, which are similar design parameter, are extremely low emittance. We discuss the ion instability for these rings.
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| FRPMN054 |
The Design Study of IP-BPM for the ILC
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4120 |
| |
- S. H. Shin, E.-S. Kim, H.-S. Kim
Kyungpook National University, Daegu
- Y. Honda, J. Urakawa
KEK, Ibaraki
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Beam position monitors (BPMs) with a resolution in a few nanometers range are required to control beams in the locations that are close to the interaction point (IP) of the International Linear Collider (ILC). ATF2 at KEK has considered as a test facilitiy to investigate this requirement. We have performed the design study for IP-BPM by using of the electromagnetic simulation program MAFIA and HFSS. The designed IP-BPM consists of one cell sensor cavity and one cell reference cavity. The results of the design studies showed signal decay time of 20 ns and orbit sensitivity of a few nm. The signal voltage from sensor cavity showed increasing of a factor of 3 and 2 in horizontal and vertical directions, respectively, than the IP-BPM that was installed ATF extraction beam line. We present the results of design studies in which include effects of common mode contamination in the IP-BPM.
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