Very fast kicker with high repetition rate for accelerator applications

Grishanov, B.I.; Podgorny, F.V.; Rummler, J.; Shiltsev, Vladimir

doi:10.1016/s0168-9002(97)00739-0

Cited by 19 publications

(9 citation statements)

References 1 publication

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“…It is also important to remark that the calculation of the coupling and transfer impedances by HFSS simulating the beam with a wire, gives the same results as GDFIDL simulations within a 15% of error due to the wire approximation. Of course, the wire simulations are valid below the cutoff frequency of the beam pipe modes, that, in our example, are at $4:4 GHz and $5:7 GHz for the TE 11 and TM 01 modes, respectively.…”

Section: Advantages Of Tapered Kickersmentioning

confidence: 92%

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Design, test, and operation of new tapered stripline injection kickers for thee+e−colliderDAΦNE

Alesini

Guiducci

Marcellini

et al. 2010

Phys. Rev. ST Accel. Beams

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For the injection upgrade of the È factory DAÈNE, new fast stripline kickers have been designed. They can operate with very short pulse generators to perturb only the injected bunch and the two stored adjacent ones. The design is based on tapering the striplines to simultaneously obtain low beam coupling and transfer impedances, excellent uniformity of the deflecting field, and better matching between the strip and the pulse generators. It has been done using 2D and 3D electromagnetic codes (SUPERFISH and HFSS). The kickers have been constructed, tested, and installed in the collider. Measurements of the reflection coefficient at input ports and of the longitudinal and transverse beam coupling impedance have been also performed to characterize the structure and have been compared to the simulation results. A circuital model of general tapered striplines for a first order estimation of the transfer and longitudinal beam coupling impedances is also presented. Finally operational performances are described, pointing out the problems which occurred and the flexibility of the stripline structures that worked with both the short and with the previously installed long pulse generators and have been used as an additional damping kicker to improve the efficiency of the horizontal multibunch feedback system. This system is also a demonstration of the operation of fast kickers with similar characteristics as those for the International Linear Collider (ILC) damping rings (DRs).

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Section: Advantages Of Tapered Kickersmentioning

confidence: 92%

“…The structures adopted in Accelerator Test Facility [10] or proposed for the TESLA DR [11], as example, have constant impedance and constant profile stripline sections. In those cases the uniformity of the deflecting field has been increased by a proper shaping of the electrode transverse profile.…”

Section: Introductionmentioning

confidence: 99%

Design, test, and operation of new tapered stripline injection kickers for thee+e−colliderDAΦNE

Alesini

Guiducci

Marcellini

et al. 2010

Phys. Rev. ST Accel. Beams

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“…The operation of the electron lens look very similar to a traveling wave kicker [6]. Now we consider the time structure of the defocusing kick (or the tune shift) produced by the traveling wave kicker.…”

Section: Electron Current Modulationmentioning

confidence: 99%

Electron lens to compensate bunch-to-bunch tune spread in TeV-33

Shiltsev¹

1997

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In this article we discuss an electron beam lens for compensation of bunch-to-bunch tune spread in the Tevatron antiproton beam. Time-modulated current of an electron beam can produce defocusing forces necessary to compensate effects caused by parasitic beam-beam interactions with proton beam. We estimate maim parameters of the electron beam and consider resulting beam footprint. Emittance growth rate due to the electron current fluctuations is discussed.

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“…Subjecting to the practical technological limitation, certain raise time for a ultrafast pulse kicker is indispensable, whose a limiting value under current state of art is around 2 ns. The strip-line type kicker and its associated power supply design is the leading-edge technology in a relevant field nowadays, and being developed in several light sources [16,17]. Thus the outermost injection point in our scheme must be far from the circulating bunch with a time offset around 2 ns, otherwise there is no sufficient time to raise a full strength pulse, or disturbing the circulating bunch if one wants to bring forward the raising of this pulse.…”

Section: Introductionmentioning

confidence: 99%

On-axis injection scheme based on a triple-frequency rf system for diffraction-limited storage rings

Jiang

2018

Phys. Rev. Accel. Beams

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As the multibend achromats had been applied to the lattice design in latest light sources to achieve ultralow beam emittance, whereas its performance is restricted by the strong sextupoles and concomitant nonlinearities to a certain extent. Contractive dynamic aperture becomes an inevitable but pivotal characteristic of future diffraction-limited storage rings, which lead to the exclusion of the conventional off-axis injection schemes. In this paper we will present a new on-axis injection scheme in allusion to future light sources, which is based on a triple-frequency rf system. By means of delicate superposition of rf voltages with fundamental, 2nd and 3rd hamonic frequencies, a commodious and rational main bucket which can accommodate an injected bunch and a circulating bunch simultaneously is able to be formed. The injected bunch can be captured by the longitudinal acceptance on-axis in a reasonable time offset with respect to the circulating bunch, utilizing the ultrafast pulse kicker, and ultimately merging to the center of the main bucket through synchrotron radiation damping. Detailed construction of the triple-frequency rf system and application of this scheme to the High Energy Photon Source will be discussed in the paper, relevant simulation studies and discussions are also presented.

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Very fast kicker with high repetition rate for accelerator applications

Cited by 19 publications

References 1 publication

Design, test, and operation of new tapered stripline injection kickers for thee+e−colliderDAΦNE

Design, test, and operation of new tapered stripline injection kickers for thee+e−colliderDAΦNE

Electron lens to compensate bunch-to-bunch tune spread in TeV-33

On-axis injection scheme based on a triple-frequency rf system for diffraction-limited storage rings

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