Measuring the Resonance Structure of Accelerator Impedance with Single Bunches

We describe a new method used in the CERN SPS accelerator to measure the longitudinal impedance in the frequency range 100 MHz to 4 GHz. Single high intensity proton bunches were injected and their spectrum observed during slow debunching. The presence of different resonant impedances leads to line...

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Detalles Bibliográficos
Autores principales: Bohl, T, Linnecar, Trevor Paul R, Shaposhnikova, Elena
Lenguaje:eng
Publicado: 1996
Materias:
Accelerators and Storage Rings
Acceso en línea:https://dx.doi.org/10.1103/PhysRevLett.78.3109
http://cds.cern.ch/record/311683
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author Bohl, T
Linnecar, Trevor Paul R
Shaposhnikova, Elena
author_facet Bohl, T
Linnecar, Trevor Paul R
Shaposhnikova, Elena
author_sort Bohl, T
collection CERN
description We describe a new method used in the CERN SPS accelerator to measure the longitudinal impedance in the frequency range 100 MHz to 4 GHz. Single high intensity proton bunches were injected and their spectrum observed during slow debunching. The presence of different resonant impedances leads to line density modulation at the resonant frequencies. This instability reaches some maximum modulation amplitude which was recorded as a function of frequency for many bunches. Using sufficiently long bunches the SPS impedance structure was observed and previously unknown sources were identified.
id cern-311683
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1996
record_format invenio
spelling cern-3116832023-05-05T12:57:28Zdoi:10.1103/PhysRevLett.78.3109http://cds.cern.ch/record/311683engBohl, TLinnecar, Trevor Paul RShaposhnikova, ElenaMeasuring the Resonance Structure of Accelerator Impedance with Single BunchesAccelerators and Storage RingsWe describe a new method used in the CERN SPS accelerator to measure the longitudinal impedance in the frequency range 100 MHz to 4 GHz. Single high intensity proton bunches were injected and their spectrum observed during slow debunching. The presence of different resonant impedances leads to line density modulation at the resonant frequencies. This instability reaches some maximum modulation amplitude which was recorded as a function of frequency for many bunches. Using sufficiently long bunches the SPS impedance structure was observed and previously unknown sources were identified.CERN-SL-96-062-RFoai:cds.cern.ch:3116831996-09-16
spellingShingle Accelerators and Storage Rings
Bohl, T
Linnecar, Trevor Paul R
Shaposhnikova, Elena
Measuring the Resonance Structure of Accelerator Impedance with Single Bunches
title Measuring the Resonance Structure of Accelerator Impedance with Single Bunches
title_full Measuring the Resonance Structure of Accelerator Impedance with Single Bunches
title_fullStr Measuring the Resonance Structure of Accelerator Impedance with Single Bunches
title_full_unstemmed Measuring the Resonance Structure of Accelerator Impedance with Single Bunches
title_short Measuring the Resonance Structure of Accelerator Impedance with Single Bunches
title_sort measuring the resonance structure of accelerator impedance with single bunches
topic Accelerators and Storage Rings
url https://dx.doi.org/10.1103/PhysRevLett.78.3109
http://cds.cern.ch/record/311683
work_keys_str_mv AT bohlt measuringtheresonancestructureofacceleratorimpedancewithsinglebunches
AT linnecartrevorpaulr measuringtheresonancestructureofacceleratorimpedancewithsinglebunches
AT shaposhnikovaelena measuringtheresonancestructureofacceleratorimpedancewithsinglebunches

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