Zobrazeno 1 - 10
of 329
pro vyhledávání: '"Kroll, N."'
Autor:
Tantawi, S. G., Nantista, C., Kroll, N., Li, Z., Miller, R., Ruth, R., Wilson, P., Neilson, J.
Publikováno v:
Phys.Rev.ST Accel.Beams 5 (2002) 032001
The Delay Line Distribution System (DLDS) is an alternative to conventional pulse compression, which enhances the peak power of rf sources while matching the long pulse of those sources to the shorter filling time of accelerator structures. We presen
Externí odkaz:
http://arxiv.org/abs/physics/0209061
Autor:
Jones, R. M., Li, Z., Miller, R. H., Raubenheimer, T. O., Ruth, R. D., Stupakov, G. V., Wang, J. W., Kroll, N. M.
Earlier RDDS (Rounded Damped Detuned Structures) [1,2], designed, fabricated and tested at SLAC, in collaboration with KEK, have been shown to damp wakefields successfully. However, electrical breakdown has been found to occur in these structures and
Externí odkaz:
http://arxiv.org/abs/physics/0206090
Dipole wakefields in NLC (Next Linear Collider) structures have been measured with ASSET [1] and well predicted by a circuit model [2]. However, the experimental technique is both time-consuming and expensive. Here, we report on kick factor and synch
Externí odkaz:
http://arxiv.org/abs/physics/0206089
Autor:
Jones, R. M., Kroll, N. M., Higo, T., Li, Z., Miller, R. H., Raubenheimer, T. O., Wang, J. W.
Publikováno v:
Conf.Proc.C0106181:3810-3812,2001
Recent experiments at SLAC [1,2] and CERN [3] have revealed evidence of significant deformation in the form of "pitting" of the cells of the 1.8m series of structures DDS/RDDS (Damped Detuned Structure/Rounded Damped Detuned Structure). This pitting
Externí odkaz:
http://arxiv.org/abs/physics/0107049
Publikováno v:
Conf.Proc.C0106181:936-938,2001
Operating the SLAC/KEK DDS (Damped Detuned Structure) X-band linacs at high gradients (in excess of 70MV/m) has recently been found to be limited by the accelerator structures breaking down and as a consequence severe damage occurs to the cells which
Externí odkaz:
http://arxiv.org/abs/physics/0107048
Two basic designs have been developed for waveguide hybrids, or 3-dB couplers, capable of handling hundreds of megawatts at X-band. Coupling is provided by one or two connecting waveguides with h-plane junctions and matching elements. In the former c
Externí odkaz:
http://arxiv.org/abs/physics/0102033
Autor:
Wang, J. W., Adolphsen, C., Bowden, G. B., Burke, D. L., Cornuelle, J., Dolgashev, V. A., Fowkes, W. B., Jobe, R. K., Jones, R. M., Ko, K., Kroll, N., Li, Z., Loewen, R. J., McCormick, D., Miller, R. H., Ng, C. K., Pearson, C., Raubenhemer, T. O., Reed, R., Ross, M., Ruth, R. D., Smith, T., Stupakov, G., Higo, T., Funahashi, Y., Higashi, Y., Hitomi, N., Suzuki, T., Takata, K., Takatomi, T., Toge, N., Watanabe, Y.
Publikováno v:
eConf C000821:TUA03,2000
As a joint effort in the JLC/NLC research program, we have developed a new type of damped detuned accelerator structure with optimized round-shaped cavities (RDDS). This paper discusses some important R&D aspects of the first structure in this series
Externí odkaz:
http://arxiv.org/abs/physics/0009025
Publikováno v:
eConf C000821:TUA09,2000
In damping the wakefield generated by an electron beam traversing several thousand X-band linacs in the NLC we utilise a Gaussian frequency distribution of dipole modes to force the modes to deconstructively interfere, supplemented with moderate damp
Externí odkaz:
http://arxiv.org/abs/physics/0008211
Publikováno v:
eConf C000821:TUA10,2000
In the NLC (Next Linear Collider) small misalignments in each of the individual accelerator structures (or the accelerator cells) will give rise to wakefields which kick the beam from its electrical axis. This wakefield can cause BBU (Beam Break Up)
Externí odkaz:
http://arxiv.org/abs/physics/0008202
Autor:
Jones, R. M., Higo, T., Higashi, Y., Toge, N., Kroll, N. M., Loewen, R. J., Miller, R. H., Wang, J. W.
Publikováno v:
eConf C000821:TUA08,2000
In fabricating the first X-Band RDDS (Rounded Damped Detuned Structure) accelerator structure, microwave measurements are made on short groups of discs prior to bonding the discs of the entire structure. The design dispersion curves are compared with
Externí odkaz:
http://arxiv.org/abs/physics/0008203