dorsal/arxiv
View SchemaFirst-Order Averaging Principles for Maps with Applications to Beam Dynamics in Particle Accelerators
| Authors | Scott Dumas, James A. Ellison, Mathias Vogt |
|---|---|
| Categories | |
| ArXiv ID | physics/0311058 |
| URL | https://arxiv.org/abs/physics/0311058 |
Abstract
For slowly evolving, discrete-time-dependent systems of difference equations (iterated maps), we believe the simplest means of demonstrating the validity of the averaging method at first order is by way of a lemma that we call Besjes' inequality. In this paper, we develop the Besjes inequality for identity maps with perturbations that are (i) at low-order resonance (periodic with short period) and (ii) far from low-order resonance in the discrete time. We use these inequalities to prove corresponding first-order averaging principles, together with a principle of adiabatic invariance on extended timescales; and we generalize and apply these mathematical results to model problems in accelerator beam dynamics, and to the Henon map.
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"abstract": "For slowly evolving, discrete-time-dependent systems of difference equations\n(iterated maps), we believe the simplest means of demonstrating the validity of\nthe averaging method at first order is by way of a lemma that we call Besjes\u0027\ninequality. In this paper, we develop the Besjes inequality for identity maps\nwith perturbations that are (i) at low-order resonance (periodic with short\nperiod) and (ii) far from low-order resonance in the discrete time. We use\nthese inequalities to prove corresponding first-order averaging principles,\ntogether with a principle of adiabatic invariance on extended timescales; and\nwe generalize and apply these mathematical results to model problems in\naccelerator beam dynamics, and to the Henon map.",
"arxiv_id": "physics/0311058",
"authors": [
"Scott Dumas",
"James A. Ellison",
"Mathias Vogt"
],
"categories": [
"physics.acc-ph",
"math.DS"
],
"title": "First-Order Averaging Principles for Maps with Applications to Beam Dynamics in Particle Accelerators",
"url": "https://arxiv.org/abs/physics/0311058"
},
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