Erratum: Electron cloud instability in high intensity proton rings [Phys. Rev. ST Accel. Beams<b>5</b>, 114402 (2002)]

Ohmi, K.; Toyama, T.; Ohmori, C.

doi:10.1103/physrevstab.6.029901

Cited by 15 publications

(21 citation statements)

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“…If we want to get an electron amplification factor A e , we need to calculate the trajectories of the electrons in the proton beam potential. The A e values of some d max were estimated by simulations [3], and we used these values as substitutions. From these simulations, the average A e values were estimated to be about 4.6 (d max = 1.5, TiN) and 18 (d max = 1.8, ferrite), respectively.…”

Section: Sey Measurementmentioning

confidence: 99%

“…The electron cloud effect in the RCS was evaluated by simulations [2,3], where assumptions had to be made about the secondary electron emission yield (SEY) of the chamber surface, the beam loss point and the number of lost protons. In this study, we measured the SEY from samples, which were processed in a similar way as the actual chamber surface and exposed to an electron beam in order to simulate the actual beam loss around the beam line.…”

Section: Introductionmentioning

confidence: 99%

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Estimation of secondary electron effect in the J-PARC rapid cycling synchrotron after first study

Yamamoto

Kamiya

Ogiwara

et al. 2009

Applied Surface Science

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Section: Sey Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Estimation of secondary electron effect in the J-PARC rapid cycling synchrotron after first study

Yamamoto

Kamiya

Ogiwara

et al. 2009

Applied Surface Science

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“…Electron clouds are generally observed to provide a limit to the beam current [30]. However recent work predicts that even below the current limit, small electron cloud densities can cause slow emittance growth over thousands of turns in an accelerator ring, and that could be disastrous for colliders where the number of desired interaction events decreases rapidly with increasing emittance and hence increasing beam size at the collision point [31].…”

Section: Issuementioning

confidence: 99%

“…c. These experiments would also benefit from longer duration ion beams, to provide more time for desorbed gas to reach the beam. For this purpose, consider using STS-500 pulser: can we achieve operation at 500 kV for [18][19][20][21][22][23][24][25][26][27][28][29][30] µs with a modified existing facility? Can we vary duration to check the scaling with time of gas-induced beam loss?…”

Section: Issue: Reduce Gas-induced Beam Loss and Degradation To Neglimentioning

confidence: 99%

Critical issues for high-brightness heavy-ion beams --prioritized

Molvik¹,

Cohen²,

Davidson³

et al. 2007

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SUMMARYThis study group was initiated to consider whether there were any "show-stopper" issues with accelerators for heavy-ion warm-dense matter (WDM) and heavy-ion inertial fusion energy (HIF), and to prioritize them. Showstopper issues would appear as limits to beam current; that is, the beam would be well-behaved below the current limit, and significantly degraded in current or emittance if the current limit were exceeded at some region of an accelerator. We identified 14 issues: 1-6 could be addressed in the near term, 7-10 are potentially attractive solutions to performance and cost issues but are not yet fully characterized, 11-12 involve multibeam effects that cannot be more than partially studied in near-term facilities, and 13-14 involve new issues that are present in some novel driver concepts. Comparing the issues with the new experimental, simulation, and theoretical tools that we have developed, it is apparent that our new capabilities provide an opportunity to re-examine and significantly increase our understanding of the number one issue -halo growth and mitigation.

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“…Electron effects presently limit the performance of many ion accelerators [1][2][3]. One source of these electrons is electrons emitted from collisions between beam ions and the beam pipe walls.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of the generation of secondary electrons in the High Current Experiment

Stoltz

Furman

Vay

et al. 2003

Phys. Rev. ST Accel. Beams

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Electron effects in the High Current Experiment (HCX) are studied via computer simulation. An approximate expression for the secondary electron yield for a potassium ion striking stainless steel is derived and compared with experimental results. This approximate expression has a peak of roughly 55 electrons at normal incidence at an ion energy of 60 MeV. Using an empirical angular dependence, the secondary electron yield is combined with a numerical simulation of the HCX ion beam dynamics to obtain an estimate for the number of secondary electrons expected per ion-wall collision in the HCX. This estimate is that approximately 150-200 electrons per ion collision may result in the HCX.

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Erratum: Electron cloud instability in high intensity proton rings [Phys. Rev. ST Accel. Beams5, 114402 (2002)]

Cited by 15 publications

References 0 publications

Estimation of secondary electron effect in the J-PARC rapid cycling synchrotron after first study

Estimation of secondary electron effect in the J-PARC rapid cycling synchrotron after first study

Critical issues for high-brightness heavy-ion beams --prioritized

Numerical simulation of the generation of secondary electrons in the High Current Experiment

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