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Title |
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| THPMN058 |
Beam Dynamics Studies in the CLIC Injector Linac
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2838 |
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- A. Ferrari
UU/ISV, Uppsala
- A. Latina, L. Rinolfi, F. Tecker
CERN, Geneva
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The CLIC Injector Linac has to accelerate both electron and positron main beams from 200 MeV up to 2.42 GeV prior to their injection into the pre-damping rings. Its 26 accelerating structures operate at 1.875 GHz, with a loaded gradient of 17 MV/m. A FODO lattice that wraps the accelerating structures at the beginning of the linac, followed by a succession of triplet lattices between the accelerating structures, is proposed. The large transverse emittance (9200 mm.mrad), bunch length (5 mm) and energy spread (7 MeV) of the positron beam set constraints on the linac in order to reach acceptable characteristics at 2.42 GeV for the injection into the pre-damping ring. The use of a bunch compressor at the entrance of the linac is an option in order to achieve good performance in both the longitudinal and transverse phase spaces. Tracking studies of both electron and positron beams in the linac have been performed and are presented.
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| THPMN063 |
CTF3 Combiner Ring Commissioning
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2850 |
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- F. Tecker, R. Corsini, S. Doebert, P. K. Skowronski, P. Urschutz
CERN, Geneva
- C. Biscari, A. Ghigo
INFN/LNF, Frascati (Roma)
- E. Bressi
CNAO Foundation, Milan
- A. Ferrari
UU/ISV, Uppsala
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CLIC Test Facility 3 (CTF3) has the objective to demonstrate the remaining feasibility issues of the CLIC two-beam technology for a future multi-TeV linear collider. One key issue is the efficient generation of a very high current 'drive beam' that serves as the power source for the acceleration of the main beam to high energy. This large current beam is produced by interleaving bunches in a combiner ring using transverse deflecting RF cavities. The 84 m long CTF3 combiner ring and the connecting transfer line have been recently installed and put into operation. The latest commissioning results will be presented.
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| FRPMS045 |
Non-Destructive Single Shot Bunch Length Measurements for the CLIC Test Facility 3
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4069 |
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- A. E. Dabrowski, M. Velasco
NU, Evanston
- H.-H. Braun, R. Corsini, S. Doebert, T. Lefevre, F. Tecker, P. Urschutz
CERN, Geneva
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Funding: DOE
A non-destructive bunch length detector has been installed in the CLIC Test Facility (CTF3). Using a series of down-converting mixing stages and filters, the detector analyzes the power spectrum of the electromagnetic field picked-up by a single waveguide. This detector evolved from an earlier system which was regularly used for bunch length measurements in CTF2. Major improvements are increase of frequency reach from 90 GHz to 170 GHz, allowing for sub-pico second sensitivity, and single shot measurement capability using FFT analysis from large bandwidth waveform digitisers. The results of the commissioning of the detector in 2006 are presented.
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| FROBC01 |
30 GHz High-Gradient Accelerating Structure Test Results
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3818 |
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- J. A. Rodriguez, G. Arnau-Izquierdo, R. Corsini, S. Doebert, R. Fandos, A. Grudiev, I. Syratchev, M. Taborelli, F. Tecker, P. Urschutz, W. Wuensch
CERN, Geneva
- H. Aksakal, Z. Nergiz
Ankara University, Faculty of Sciences, Tandogan/Ankara
- M. Johnson
UU/ISV, Uppsala
- O. M. Mete
Ankara University, Faculty of Engineering, Tandogan, Ankara
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The CLIC study is high power testing accelerating structures in a number of different materials and accelerating structure designs to understand the physics of breakdown, determine the appropriate scaling of performance and in particular to find ways to increase achievable accelerating gradient. The most recent 30 GHz structures which have been tested include damped structures in copper, molybdenum, titanium and aluminum. The results from these new structures are presented and compared to previous ones to determine dependencies of quantities such as achievable accelerating gradient, pulse length, power flow, conditioning rate and breakdown rate.
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Slides
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