Accelerator structure R&amp;D for linear colliders

Wang, J.W.; Adolphsen, C.; Bane, K.; Bowden, Gordon; Burke, D. L.; Deruyter, H.; Cornuelle, J.; Farkas, Z.D.; Fowkes, W.B.; Hanna, S.M.; Hoag, H.A.; Irwin, J.; Jones, R. M.; Ko, K.; Kroll, N.; Li, Z.; Loew, G.A.; Loewen, R.J.; Miller, R.H.; Ng, C.; Paterson, J. M.; Pearson, C.; Raubenhemer, T.O.; Rifkin, J.; Ruth, Relinda; Tantawi, Sami; Thompson, K.A.; Vaillancourt, K.W.; Vlieks, A.E.; Wilson, P.B.; Asano, Kouichi; Funahashi, Y.; Higashi, Yukihito; Higo, T.; Hitomi, Nobuteru; Suzuki, Takao; Takata, K.; Takatomi, T.; Toge, N.; Watanabe, Yasuhiro; Elmer, J. W.; Klingmann, J L; Mugge, M.; Bibber, K. van

doi:10.1109/pac.1999.792324

Cited by 23 publications

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“…A historical summary of SLAC accelerator structure R&D at 11.424 GHz is given in [57]. has also included near completion of fabrication and quality control measurements for RDDS 1 and design studies for RDDS2.…”

Section: Recent Progress On Damped Detuned Accelerator Structuresmentioning

confidence: 99%

Theoretical Problems in Accelerator Physics

2001

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PHYSICSThis is the first progress report submitted since my current grant was renewed and covers progress made since the submission of the renewal proposal November 12, 1998. During I. RECENT PROGRESS ON DAMPED DETUNED ACCELERATOR STRUCTURESA historical summary of SLAC accelerator structure R&D at 11.424 GHz is given in [57]. has also included near completion of fabrication and quality control measurements for RDDS 1 and design studies for RDDS2. We discuss these items separately below. DDS3:As discussed in [38] and summarized in the second progress report of the previous grant renewal, the DDS3 design was modified from that of DDS 1 in two respects: (1) the manifold terminations were improved by redesigning the manifolds and mitered bends at the downstream end terminating all of them with better matched windows, and (2) the synchronous frequency distribution was modified so that Kdn/df rather than dnldf was Gaussian, a change intended to improve the first few meters of the wake. The same

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Section: Recent Progress On Damped Detuned Accelerator Structuresmentioning

confidence: 99%

Theoretical Problems in Accelerator Physics

2001

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“…In addition, as can be seen in Fig. 2, the transverse wakefield is weakly damped, to prevent the modes from re-cohering at a later time, by coupling the cavities to four manifolds that parallel the cavities [8]. However, in the present structure design it is difficult to couple the last few cavities at the end of the structure to the manifold and this results in a few modes that are not sufficiently damped, causing a severe BBU instability [9].…”

Section: Higher-order Modes and Beam Break-upmentioning

confidence: 99%

Accelerator Physics Challenges for Future Linear Colliders

Raubenheimer¹

1999

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At the present time, there are a numberof future linear collider designs with a center-of-mass energy of 500 GeV or more with luminosities in excess of 10 34 cm ,2 s ,1 . Many of these designs are at an advanced state of development. However, to attain the high luminosity, the colliders require very small beam emittances, strong focusing, and very goodstability. In this paper, some of the outstanding issues related to producing and maintaining the small beam sizes are discussed. Although the di erent designs are based very di erent rf technologies, many of these problems are common. AbstractAt the present time, there are a number of future linear collider designs with a center-of-mass energy of 500 GeV or more with luminosities in excess of 10 34 cm ,2 s ,1 . Many of these designs are at an advanced state of development. However, to attain the high luminosity, the colliders require very small beam emittances, strong focusing, and very good stability. In this paper, some of the outstanding issues related to producing and maintaining the small beam sizes are discussed. Although the different designs are based very different rf technologies, many of these problems are common.

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“…As part of this effort, R&D on advanced accelerator structures at SLAC and KEK started in the late 1980's. The flow chart below provides a brief summary of the accelerator structure design progression that followed [3] . * Work supported by U.S. Department of Energy, contract DE-AC03-76F00515 and part of Japan-US Collaboration Program In High Energy Physics Research.…”

Section: Introductionmentioning

confidence: 99%

Accelerator Structure Development for NLC/GLC

Wang¹

2004

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The NLC (Next Linear Collider) and GLC (Global Linear Collider) [1,2] are e + e -linear collider proposals based on room-temperature accelerator technology -so called "warm machines" in comparison with the TESLA "cold machine" that is based on superconducting accelerator technology. There have been two major challenges in developing X-band (11.4 GHz) accelerator structures for the GLC/NLC. The first is to demonstrate stable, long-term operation at the high gradient (65 MV/m) that is required to optimize the machine cost. The second is to strongly suppress the beam induced long-range wakefields, which is required to achieve high luminosity. The development of high gradient structures has been a high priority in recent years. Nearly thirty X-band structures with various rf parameters, cavity shapes and coupler types have been fabricated and tested since 2000. This program has been a successful collaborative effort among groups at SLAC, KEK, FNAL and other labs. A summary of the main achievements and experiences are presented in this paper as well as a status report on the structure design, high power performance, manufacturing techniques, and other structure related issues.

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Accelerator structure R&D for linear colliders

Cited by 23 publications

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Theoretical Problems in Accelerator Physics

Theoretical Problems in Accelerator Physics

Accelerator Physics Challenges for Future Linear Colliders

Accelerator Structure Development for NLC/GLC

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