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- Glen R. White, Ron Ainsworth, +88 authors F’rank Zimmermann
- Physical review letters
- 2014

A novel scheme for the focusing of high-energy leptons in future linear colliders was proposed in 2001 [P. Raimondi and A. Seryi, Phys. Rev. Lett. 86, 3779 (2001)]. This scheme has many advantageous properties over previously studied focusing schemes, including being significantly shorter for a given energy and having a significantly better energy… (More)

- Andy Wolski, M . D . Woodley, J. Wu
- 2003

Previous lattice designs for the Next Linear Collider Main Damping Rings [1] have met the specifications for equilibrium emittance, damping rate and dynamic aperture. Concerns about the effects of the damping wiggler on the beam dynamics [2] led to the aim of reducing the total length of the wiggler to a minimum consistent with the required damping rate, so… (More)

The minimum p achievable at the interaction point @*> with the current design of the SLC final focus is limited to -5 mm by third order optical aberrations, most notably the Utzti and W3466 terms (using the notation of K. Brown). A new lattice is presented which effectively zeros these terms. The remaining third order terms which accrue from the interleaved… (More)

- Pantaleo Raimondi, T . L . Usher, +29 authors Florian Zimmermann
- 1998

The luminosity of the SLAC Linear Collider (SLC) has been increased by more than a factor of three during the 1997-98 run. Improved alignment and emittance tuning techniques throughout the accelerator resulted in minimal emittance growth from the damping rings to the final focus. In particular, a revised strategy for wakefield cancellation using precision… (More)

- Jimmy L Turner, C. Adolphsen, +9 authors M . D . Woodley
- 1995

Vibration measurements of the linear accelerator structures in the SLC linac show a 1 micron rms vertical motion. This motion reduces to 0.2 micron rms motion when the cooling water to the accelerator structures is turned off. The quadrupoles have 250 nanometer rms vertical motion with the accelerator structure cooling water on and 60 nanometer motion with… (More)

* Work supported by the U.S. Department of Energy under Contract DE-AC02-76SF00515. Abstract In future linear colliders the luminosity will depend on maintaining the small emittance aspect ratio delivered by damping rings. Correction of cross-plane coupling can be important in preventing dilution of the beam emittance. In order to minimize the vertical… (More)

- Yoshihito Honda, Keishi Kubo, +50 authors F’rank Zimmermann
- Physical review letters
- 2004

For high luminosity in electron-positron linear colliders, it is essential to generate low vertical emittance beams. We report on the smallest vertical emittance achieved in single-bunch-mode operation of the Accelerator Test Facility, which satisfies the requirement of the x-band linear collider. The emittances were measured with a laser-wire beam-profile… (More)

The SLC final focus system is designed to have an overall demagnification of 30: I, with a fl at the interaction point @*) of 5 mm, and an energy band pass of -0.4%. Strong sextupole pairs are used to cancel the large chromaticity which accrues primarily from the final triplet. Third-order aberrations limit the performance of the system, the dominating… (More)

Significant beam intensity-dependence of the vertical emittance growth was experimentally observed at the Accelerator Test Facility (ATF) at KEK extraction beamline. This paper presents the simulations of possible vertical emittance growth sources, particularly in the extraction channel, where the magnets are shared by both the ATF extraction beamline and… (More)

The damping rings of a future linear collider will have demanding alignment and stability requirements in order to achieve the low vertical emittance necessary for high luminosity. The Accelerator Test Facility (ATF) at KEK has successfully demonstrated the vertical emittance below 5 pm [1] that is specified for the GLC/NLC Main Damping Rings. One… (More)