Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Shinton, I. R. R."'
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
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
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
We analyse the higher order modes (HOM's) in the 3.9GHz bunch shaping cavities installed in the FLASH facility at DESY. A suite of finite element computer codes (including HFSS and ACE3P) and globalised scattering matrix calculations (GSM) are used t
Externí odkaz:
http://arxiv.org/abs/1110.1216
Off-axis beams passing through an accelerating cavity excite dipole modes among other higher order modes (HOMs). These modes have linear dependence on the transverse beam offset from the cavity axis. Therefore they can be used to monitor the beam pos
Externí odkaz:
http://arxiv.org/abs/1109.2206
Autor:
Zhang, P., Baboi, N., Ecklebe, H., Flisgen, T., Glock, H. W., Jones, R. M., Lorbeer, B., Shinton, I. R. R.
An electron beam entering an accelerator cavity excites higher order modes (HOM). These are radiated to HOM couplers and subsequently damped. They can also be used to facilitate beam position monitoring. The modes excited by off-axis beams are the fo
Externí odkaz:
http://arxiv.org/abs/1105.4329
Autor:
Shinton, I. R. R., Baboi, N., Flisgen, T., Glock, H. W., Jones, R. M., van Rienen, U, Zhang, P.
Transverse modes in the 3.9 GHz cavities, designed and fabricated by FNAL, are reported on. These modes have the potential to cause significant emittance dilution if they are not sufficiently suppressed. Recent probe-based-experiments have indicated
Externí odkaz:
http://arxiv.org/abs/1010.0437
Autor:
Zhang, P., Baboi, N., Flisgen, T., Glock, H. W., Jones, R. M., Lorbeer, B., van Rienen, U, Shinton, I. R. R.
Third harmonic superconducting cavities have been designed and fabricated by FNAL to minimise the energy spread along bunches in the FLASH facility at DESY. A module, consisting of four nine-cell 3.9 GHz cavities, has been installed in FLASH. The fir
Externí odkaz:
http://arxiv.org/abs/1009.4863
Autor:
Gerstl, S., Baumbach, T., Casalbuoni, S., Grau, A. W., Hagelstein, M., de Jauregui, D. Saez, Boffo, C., Sikler, G., Baglin, V., Cox, M. P., Schouten, J. C., Cimino, R., Commisso, M., Spataro, B., Mostacci, A., Wallén, E. J., Weigel, R., Clarke, J., Scott, D., Bradshaw, T. W., Jones, R. M., Shinton, I. R. R.
Publikováno v:
Conf.Proc.C100523:wepd015,2010
One of the still open issues for the development of superconducting insertion devices is the understanding of the beam heat load. With the aim of measuring the beam heat load to a cold bore and the hope to gain a deeper understanding in the beam heat
Externí odkaz:
http://arxiv.org/abs/1006.0089
Autor:
Shinton, I. R. R., Baboi, N., Eddy, N., Flisgen, T., Glock, H. W., Jones, R. M., Juntong, N., Khabiboulline, T. N., van Rienen, U, Zhang, P.
Publikováno v:
Conf.Proc.C100523:wepec052,2010
We analyse higher order modes in the 3.9 GHz bunch shaping cavities recently installed in the FLASH facility at DESY. We report on recent experimental results on the frequency spectrum from probe based measurements made at CMTB at DESY. These are com
Externí odkaz:
http://arxiv.org/abs/1006.0085