Publikationsrepositorium - Helmholtz-Zentrum Dresden-Rossendorf
1 PublikationRegulation of electron bunch arrival time for a continuous-wave linac: Exploring the application of the H2 mixed-sensitivity problem
Maalberg, A.; Kuntzsch, M.; Zenker, K.; Petlenkov, E.
Abstract
Regulating the arrival time of electron bunches is a crucial step to improve the temporal resolution
of accelerator-based pump-probe experiments. In this regard, an electron beam regulation method,
called beam-based feedback, has been shown to work well for stabilizing longitudinal beam properties
on pulsed accelerator machines. Essentially, the method resembles a typical design of a proportional
regulator, where the plant is represented by an electron beam response matrix, and where the
inversion of such matrix produces the regulator. In recent years, however, linear accelerators (linacs)
that operate in a continuous-wave (CW) mode have received increasing attention. One of the key
features of such machines is the improved statistics of measured data, which enables a high-resolution
spectral analysis of the noise acting on the electron beam. This new insight allows to reinterpret the
electron beam regulation as a disturbance rejection goal, where the disturbance is based on measured
frequency data. In this work, we show that the proportional beam-based feedback method has a
principal performance limitation that becomes apparent by analyzing CW data. To improve this
situation, we propose a regulator design that incorporates a dynamical disturbance model formulated
in the context of the so-called H2 mixed-sensitivity problem. The designed regulator demonstrated
excellent agreement between the model and measurements carried out at the CW linac ELBE and
showed a potential to improve the proportional regulator approach.
Beteiligte Forschungsanlagen
- Strahlungsquelle ELBE DOI: 10.17815/jlsrf-2-58
Verknüpfte Publikationen
- DOI: 10.17815/jlsrf-2-58 is cited by this (Id 36501) publication
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Data publication : Open- and closed-loop data taken at ELBE for the …
ROBIS: 36503 HZDR-primary research data are used by this (Id 36501) publication -
Data publication : Open- and closed-loop data taken at ELBE for the …
RODARE: 2141 HZDR-primary research data are used by this (Id 36501) publication
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Physical Review Accelerators and Beams 26(2023)7, 072801
DOI: 10.1103/PhysRevAccelBeams.26.072801
Permalink: https://www.hzdr.de/publications/Publ-36501