| Paper |
Title |
Page |
| MOPLS117 |
Tuning Algorithms for the ILC Beam Delivery System
|
837 |
| |
- J.K. Jones
CCLRC/DL/ASTeC, Daresbury, Warrington, Cheshire
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Emittance preservation is an important aspect in the design and running of the International Linear Collider (ILC) with a direct consequence on the luminosity of the machine. The Beam Delivery System represents a major problem in this respect as it produces emittance dilution effects that are difficult to correct and that have a direct effect on the emittance as seen at the interaction point, and thus upon the luminosity of the machine. Tuning algorithms for this section of the machine rely on the correction of aberrations through the use of linear and higher order knobs, using corrections magnets distributed throughout the system. Alternative systems are also discussed. The design and implementation of these tuning algorithms, and their effectiveness in a variety of cases, are investigated and estimates made for tolerances on a variety of error sources. Simulations results are also presented for models of the ATF-2 accelerator under development at KEK, with comparisons made to the ILC design.
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| MOPLS140 |
Tuning Algorithms for the ILC Damping Rings
|
888 |
| |
- J.K. Jones
CCLRC/DL/ASTeC, Daresbury, Warrington, Cheshire
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Emittance preservation is an important aspect in the design and running of the International Linear Collider with a direct consequence on the luminosity of the machine. One major area of concern is in the damping rings, where the extracted emittances set the effective lower limits for the rest of the machine. Algorithms for tuning this system have been investigated, and simulations have been performed to understand the design and implementation issues. The different algorithms have been applied to the various damping ring designs, and the effectiveness of each algorithm has been assessed. A preliminary recommendation of tuning algorithm, and its effectiveness under various conditions, is given.
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| WEPCH074 |
Progress with Non-linear Beam Dynamic Studies of the Diamond Storage Ring
|
2089 |
| |
- R. Bartolini, I.P.S. Martin, B. Singh
Diamond, Oxfordshire
- J.K. Jones
CCLRC/DL/ASTeC, Daresbury, Warrington, Cheshire
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| |
The conflicting requirements of high-brightness photon beams combined with adequate beam lifetime and high injection efficiency mean careful control of the non-linear lattice is crucial to achieving optimum performance. As part of the optimisation of the Diamond storage ring, studies have been made of both the Touschek lifetime and storage ring injection process, with the help of on-momentum and off-momentum frequency maps. The effect of chromaticity on Touschek lifetime has also been investigated and several new sextupole settings were identified achieving good Touschek lifetime and injection efficiency.
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| THPLS030 |
Beam Optic Measurements for the Booster Synchrotron of the Diamond Light Source
|
3347 |
| |
- B. Singh, R. Bartolini, C. Christou, V.C. Kempson, I.P.S. Martin
Diamond, Oxfordshire
- J.K. Jones
CCLRC/DL/ASTeC, Daresbury, Warrington, Cheshire
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The booster synchrotron of the Diamond Light Source is a full energy injector ramping from 100 MeV to 3 GeV with a repetition rate of 5 Hz. As part of the booster commissioning, beam optic measurements were performed to characterize the booster performance. Through the use of the beam position monitors, orbit corrections, tune and chromaticity measurements were performed at injection energy and during the ramp. A first comparison with the booster model is also discussed.
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