Nonlinear theory of transverse beam echoes

@article{Sen2017NonlinearTO,
  title={Nonlinear theory of transverse beam echoes},
  author={Tanaji Sen and Yuan Li},
  journal={Physical review accelerators and beams},
  year={2017},
  volume={21},
  pages={021002}
}
  • T. SenYuan Li
  • Published 4 October 2017
  • Physics
  • Physical review accelerators and beams
Transverse beam echoes can be excited with a single dipole kick followed by a single quadrupole kick. They have been used to measure diffusion in hadron beams and have other diagnostic capabilities. Here we develop theories of the transverse echo nonlinear in both the dipole and quadrupole kick strengths. The theories predict the maximum echo amplitudes and the optimum strength parameters. We find that the echo amplitude increases with smaller beam emittance and the asymptotic echo amplitude… 

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References

SHOWING 1-10 OF 23 REFERENCES

Measurement of Transverse Echoes in RHIC

Beam echoes are a very sensitive method to measure diffusion, and longitudinal echo measurements were performed in a number of machines. In RHIC, for the first time, a transverse beam echo was

Beam echoes in the CERN SPS

Longitudinal echo signals have been produced in the CERN SPS by exciting a proton beam at 120 GeV/c with two short RF pulses separated by a suitable time-delay. The aim of the experiments was to

Direct measurement of diffusion rates in high energy synchrotrons using longitudinal beam echoes.

We have made a direct determination of the diffusion rates in a stored, coasting antiproton beam by observing the decay rates associated with beam echoes in the longitudinal plane. The beam echoes,

Observation of plasma wave echoes

Experimental observation of a new nonlinear plasma phenomenon, the plasma wave echo, is reported. A recent theory predicts that if a longitudinal electron plasma wave is excited at one position in a

Phase mixing and echoes in a pure electron plasma

The two-dimensional (2D) fluid echo is a spontaneous appearance of a diocotron wave after two externally excited waves have damped away, explicitly demonstrating the reversible nature of spatial

Diffusion measurement from observed transverse beam echoes

For this research, we study the measurement of transverse diffusion through beam echoes. We revisit earlier observations of echoes in RHIC and apply an updated theoretical model to these

Beam-beam effects at the Fermilab Tevatron: Theory

The Tevatron in Run II is operating with three trains of 12 bunches each. Long-range beam-beam interactions have been significant sources of beam loss and lifetime limitations of antiprotons. The

Spin Echoes

Intense radiofrequency power in the form of pulses is applied to an ensemble of spins in a liquid placed in a large static magnetic Geld H&. The frequency of the pulsed r-f power satisGes the

Echo spectroscopy and quantum stability of trapped atoms

It is demonstrated that the dephasing of ultra cold 85Rb atoms trapped in an optical dipole trap can be reversed by stimulating a coherence echo with a pi pulse between the two pi / 2 pulses, in analogy to the photon echo.

Orientation and alignment echoes.

The mechanism of the echo formation by the kick-induced filamentation of phase space is elucidated, and the first experimental demonstration of classical alignment echoes in a thermal gas of CO_{2} molecules excited by a pair of femtosecond laser pulses is provided.