dorsal/arxiv
View SchemaA Resonant Cavity for Single-Shot Emittance Measurement
| Authors | J. S. Kim, C. D. Nantista, D. H. Whittum, R. H. Miller, S. G. Tantawi, A. W. Weidemann |
|---|---|
| Categories | |
| ArXiv ID | physics/0209068 |
| URL | https://arxiv.org/abs/physics/0209068 |
| Journal | Conf.Proc.C0106181:1345-1347,2001 |
Abstract
We present a non-invasive, resonant cavity based approach to beam emittance measurement of a shot-to-shot non-circular beam pulse of multi-bunches. In a resonant cavity, desired field components can be enhanced up to Q_L_lambda/pi, where Q_L_lambda is the loaded Q of the resonance mode lambda, when the cavity resonant mode matches with the beam operating frequency. In particular, a Quad-cavity, with its quadrupole mode at beam operating frequency, extracts the beam quad-moment exclusively, utilizing the symmetry of the cavity and some simple networks to suppress common modes. Six successive beam quadrupole moment measurements, performed at different betatron phases in a linear transport system, allow us to determine the beam emittance, i.e., the beam size and shape in the beam's phase space. One measurement alone provides the rms-beam size if the beam position is given, for instance, by nearby beam-position-monitors. This paper describes the basic design and analysis of a Quad-cavity beam monitoring system.
{
"annotation_id": "ee035657-67e0-46c2-858d-c2f9f87cba69",
"date_created": "2026-03-02T18:00:39.759000Z",
"date_modified": "2026-03-02T18:00:39.759000Z",
"file_hash": "e15945115acb4532d6c1541e5e955c1b29d63dd0526df3962c9ddd137a2e64b9",
"private": false,
"record": {
"abstract": "We present a non-invasive, resonant cavity based approach to beam emittance\nmeasurement of a shot-to-shot non-circular beam pulse of multi-bunches. In a\nresonant cavity, desired field components can be enhanced up to Q_L_lambda/pi,\nwhere Q_L_lambda is the loaded Q of the resonance mode lambda, when the cavity\nresonant mode matches with the beam operating frequency. In particular, a\nQuad-cavity, with its quadrupole mode at beam operating frequency, extracts the\nbeam quad-moment exclusively, utilizing the symmetry of the cavity and some\nsimple networks to suppress common modes. Six successive beam quadrupole moment\nmeasurements, performed at different betatron phases in a linear transport\nsystem, allow us to determine the beam emittance, i.e., the beam size and shape\nin the beam\u0027s phase space. One measurement alone provides the rms-beam size if\nthe beam position is given, for instance, by nearby beam-position-monitors.\nThis paper describes the basic design and analysis of a Quad-cavity beam\nmonitoring system.",
"arxiv_id": "physics/0209068",
"authors": [
"J. S. Kim",
"C. D. Nantista",
"D. H. Whittum",
"R. H. Miller",
"S. G. Tantawi",
"A. W. Weidemann"
],
"categories": [
"physics.acc-ph"
],
"journal_ref": "Conf.Proc.C0106181:1345-1347,2001",
"title": "A Resonant Cavity for Single-Shot Emittance Measurement",
"url": "https://arxiv.org/abs/physics/0209068"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "fa51bfe4-1a92-4047-8bc8-135e6150d0ef",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}