dorsal/arxiv
View SchemaElectronic detection of charged particle effects in a Penning trap
| Authors | D. F. A. Winters, M. Vogel, D. M. Segal, R. C. Thompson |
|---|---|
| Categories | |
| ArXiv ID | physics/0608055 |
| URL | https://arxiv.org/abs/physics/0608055 |
| DOI | 10.1088/0953-4075/39/14/019 |
| Journal | J. Phys. B: At. Mol. Opt. Phys. 39 3131 (2006) |
Abstract
We present a thorough analysis of the electronic detection of charged particles, confined in a Penning trap, via image charges induced in the trap electrodes. Trapping of charged particles in an electrode structure leads to frequency shifts, which are due to image charge and space charge effects. These effects are of importance for Penning trap experiments which involve high charge densities or require high precision in the motional frequencies. Our analysis of image charges shows that only (higher order) odd powers of the particle displacement lead to induced charge differences, giving rise to a signal. This implies that, besides the centre-of-mass frequency of a trapped particle cloud, also higher order individual particle frequencies induce a signal, which can be picked up by an electronic detection circuit attached to the trap electrodes. We also derive analytic expressions for the image charge and space charge induced frequency shifts and perform simulations of space charge effects. In relation to this, we discuss the consequences of the shifted particle frequencies for resistive cooling of the particle motion.
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"abstract": "We present a thorough analysis of the electronic detection of charged\nparticles, confined in a Penning trap, via image charges induced in the trap\nelectrodes. Trapping of charged particles in an electrode structure leads to\nfrequency shifts, which are due to image charge and space charge effects. These\neffects are of importance for Penning trap experiments which involve high\ncharge densities or require high precision in the motional frequencies. Our\nanalysis of image charges shows that only (higher order) odd powers of the\nparticle displacement lead to induced charge differences, giving rise to a\nsignal. This implies that, besides the centre-of-mass frequency of a trapped\nparticle cloud, also higher order individual particle frequencies induce a\nsignal, which can be picked up by an electronic detection circuit attached to\nthe trap electrodes. We also derive analytic expressions for the image charge\nand space charge induced frequency shifts and perform simulations of space\ncharge effects. In relation to this, we discuss the consequences of the shifted\nparticle frequencies for resistive cooling of the particle motion.",
"arxiv_id": "physics/0608055",
"authors": [
"D. F. A. Winters",
"M. Vogel",
"D. M. Segal",
"R. C. Thompson"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1088/0953-4075/39/14/019",
"journal_ref": "J. Phys. B: At. Mol. Opt. Phys. 39 3131 (2006)",
"title": "Electronic detection of charged particle effects in a Penning trap",
"url": "https://arxiv.org/abs/physics/0608055"
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