Electron Beam Dynamics in the CERN PS

Baconnier, Y.; Cappi, R.; Garoby, R.; Hardt, W.; Hübner, Kurt; Madsen, Jes; Riunaud, J.P.

doi:10.1109/tns.1983.4332900

Cited by 2 publications

(5 citation statements)

References 2 publications

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“…For this purpose, the voltage of the electrodes has to be sufficiently large. For the computation of the potential U in the center of the bunch we consider the formula given in [11]:…”

Section: B Clearing Electrodesmentioning

confidence: 99%

“…Hence, this approach allows for very detailed numerical studies of the dynamics of ion clouds beyond established analytical results [1,11,14].…”

Section: Simulation Tool Moeve Pic Trackingmentioning

confidence: 99%

“…Considering the interaction, the field values of ions have to be interpolated to the position of both macro electrons and ions, whereas the field generated by the bunch has to be interpolated to the position of the ions [compare Eqs. (11) and (12) below].…”

Section: Simulation Tool Moeve Pic Trackingmentioning

confidence: 99%

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Numerical studies of the behavior of ionized residual gas in an energy recovering linac

Pöplau

Rienen

Meseck

2015

Phys. Rev. ST Accel. Beams

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Next generation light sources such as energy recovering linacs (ERLs) are highly sensitive to instabilities due to ionized residual gas, which must be mitigated for successful operation. Vacuum pumps are insufficient for removal of the ions, as the ions are trapped by the beam's electrical potential. Two effective measures are (i) introducing clearing gaps in the bunch train, and (ii) installing clearing electrodes which pull out the trapped ions from the electrical potential of the beam. In this paper, we present numerical studies on the behavior of ion clouds that interact with bunch trains in an ERL taking into account the effects of the clearing gaps and clearing electrodes. We present simulations with different compositions of the residual gas. Simulations are done using the MOEVE PIC Tracking software package developed at Rostock University, which has been upgraded to include the behavior of ion clouds in the environment of additional electromagnetic fields, such as generated by clearing electrodes. The simulations use the parameters of the Berlin Energy Recovery Linac Project (bERLinPro) to allow for the deduction of appropriate measures for bERLinPro 's design and operation.

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“…For this purpose, the voltage of the electrodes has to be sufficiently large. For the computation of the potential U in the center of the bunch we consider the formula given in [11]:…”

Section: B Clearing Electrodesmentioning

confidence: 99%

“…Hence, this approach allows for very detailed numerical studies of the dynamics of ion clouds beyond established analytical results [1,11,14].…”

Section: Simulation Tool Moeve Pic Trackingmentioning

confidence: 99%

See 1 more Smart Citation

Numerical studies of the behavior of ionized residual gas in an energy recovering linac

Pöplau

Rienen

Meseck

2015

Phys. Rev. ST Accel. Beams

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“…Montague said that this effect should be taken into account in the choice of parameters for future high-intensity synchrotrons. Baconnier recognised in 1987 that the Montague stopband was certainly one of the most effective mechanisms for losing particles at injection in the CERN PS [7]. In Ref.…”

Section: Montague-baconnier First (Single-particle) Approachmentioning

confidence: 99%

“…In Ref. [7], Baconnier applied Montague's theory using Keil's computation [8] for the incoherent spacecharge tune shift (instead of deducing it from the potential limited to 4 th order) and developed a computation procedure, which applies only if the stopband is approached from above (i.e.…”

Section: Montague-baconnier First (Single-particle) Approachmentioning

confidence: 99%

Space-Charge Experiments at the CERN Proton Synchrotron

Métral¹,

Giovannozzi²,

Martini³

et al. 2005

AIP Conference Proceedings

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Benchmarking of the simulation codes used for the design of the next generation of high beam power accelerators is of paramount importance due to the very demanding requirements on the level of beam losses. This is usually accomplished by comparing simulation results against available theories, and more importantly, against experimental observations. To this aim, a number of welldefined test cases, obtained by accurate measurements made in existing machines, are of great interest. Such measurements have been made in the CERN Proton Synchrotron to probe three space-charge effects: (i) transverse emittance blow-up due to space-charge induced crossing of the integer or half-integer stop-band, (ii) space-charge and octupole driven resonance trapping, and (iii) intensity-dependent emittance transfer between the two transverse planes. The last mechanism is discussed in detail in this paper and compared to simulation predictions.

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Electron Beam Dynamics in the CERN PS

Cited by 2 publications

References 2 publications

Numerical studies of the behavior of ionized residual gas in an energy recovering linac

Numerical studies of the behavior of ionized residual gas in an energy recovering linac

Space-Charge Experiments at the CERN Proton Synchrotron

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