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Akademický článek
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The control of beam phase relative to the accelerating RF field within a superconducting cavity is important in many accelerator applications and is of particular importance for a free electron laser facility. As standard practice, the phase is usual
Externí odkaz:
http://arxiv.org/abs/1805.05162
Higher order mode (HOM) beam position monitors (BPM) are being developed for the 3.9 GHz third harmonic superconducting accelerating cavities at FLASH. The transverse beam position in a cavity can be determined utilizing beam-excited HOMs based on di
Externí odkaz:
http://arxiv.org/abs/1305.5237
Autor:
Resta-Lopez, J., Clarke, C. I., Faus-Golfe, A., Fuster-Martinez, N., Hast, C., Jones, R. M., Latina, A., Pivi, M., Rumolo, G., Schulte, D., Smith, J., Tomas, R.
Collimator wakefields in the Beam Delivery System (BDS) of future linear colliders, such as the International Linear Collider (ILC) and the Compact Linear Collider (CLIC), can be an important source of emittance growth and beam jitter amplification,
Externí odkaz:
http://arxiv.org/abs/1212.6023
Autor:
Zhang, P., Baboi, N., Eddy, N., Fellenz, B., Jones, R. M., Lorbeer, B., Wamsat, T., Wendt, M.
Beam-excited higher order modes (HOM) in accelerating cavities contain transverse beam position information. Previous studies have narrowed down three modal options for beam position diagnostics in the third harmonic 3.9 GHz cavities at FLASH. Locali
Externí odkaz:
http://arxiv.org/abs/1208.2122
An international team is currently investigating the best way to use Higher Order Modes (HOM) for beam diagnostics in 3.9 GHz cavities. HOMs are excited by charged particles when passing through an accelerating structure. Third harmonic cavities work
Externí odkaz:
http://arxiv.org/abs/1206.4139
The implications of long-range wakefields on the beam quality are investigated through a detailed beam dynamics study. Injection offsets are considered and the resulting emittance dilution recorded, including systematic sources of error. These simula
Externí odkaz:
http://arxiv.org/abs/1205.6623
This study is focused on the development of a HOM-based BPM system for the ACC39 module currently installed and in operation at FLASH. A similar system is anticipated to be installed at XFEL. Coupled inter-cavity modes are simulated together with a l
Externí odkaz:
http://arxiv.org/abs/1205.3935
The key feature of the improved coupling design in the Damped Detuned Structure (DDS) is focused on the four manifolds. Rectangular geometry slots and rectangular manifolds are used. This results in a significantly stronger coupling to the manifolds
Externí odkaz:
http://arxiv.org/abs/1205.3590