Andreev, Aleksandr ; Klingbeil, Harald ; Lens, Dieter (2016)
Phase calibration strategies for synchrotron RF signals.
Frühjahrstagung der Deutschen Physikalischen Gesellschaft 2016. Darmstadt, Germany (14.03.2016-18.03.2016)
Konferenzveröffentlichung, Bibliographie
Kurzbeschreibung (Abstract)
For the FAIR facility that is currently under construction, the beam quality requirements impose several demands on the low-level RF (LLRF) systems. For example the phase error of the gap voltage of a specific RF cavity must be less than 1°. The RF reference signals for the FAIR synchrotron RF cavity systems are generated by direct digital synthesis modules (DDS) mounted in one crate called Group-DDS. In order to allow performing various multi-harmonic operations, each DDS unit operates at a certain mode defined by the harmonic number that can be changed during the operation. Since the DDS modules generate reference RF signals for different LLRF systems, the precise calibration of units to compensate the different phase response is of importance. The currently used calibration procedure is done with a fixed harmonic number for each module and uses the DDS module configured to the highest harmonic number as a reference. If the harmonic number of the DDS module is changed, one then has to repeat the calibration for the new values. Therefore, a new calibration method with respect to the absolute phases of DDS modules is under development and will be presented.
| Typ des Eintrags: | Konferenzveröffentlichung |
|---|---|
| Erschienen: | 2016 |
| Autor(en): | Andreev, Aleksandr ; Klingbeil, Harald ; Lens, Dieter |
| Art des Eintrags: | Bibliographie |
| Titel: | Phase calibration strategies for synchrotron RF signals |
| Sprache: | Englisch |
| Publikationsjahr: | 15 März 2016 |
| Veranstaltungstitel: | Frühjahrstagung der Deutschen Physikalischen Gesellschaft 2016 |
| Veranstaltungsort: | Darmstadt, Germany |
| Veranstaltungsdatum: | 14.03.2016-18.03.2016 |
| Kurzbeschreibung (Abstract): | For the FAIR facility that is currently under construction, the beam quality requirements impose several demands on the low-level RF (LLRF) systems. For example the phase error of the gap voltage of a specific RF cavity must be less than 1°. The RF reference signals for the FAIR synchrotron RF cavity systems are generated by direct digital synthesis modules (DDS) mounted in one crate called Group-DDS. In order to allow performing various multi-harmonic operations, each DDS unit operates at a certain mode defined by the harmonic number that can be changed during the operation. Since the DDS modules generate reference RF signals for different LLRF systems, the precise calibration of units to compensate the different phase response is of importance. The currently used calibration procedure is done with a fixed harmonic number for each module and uses the DDS module configured to the highest harmonic number as a reference. If the harmonic number of the DDS module is changed, one then has to repeat the calibration for the new values. Therefore, a new calibration method with respect to the absolute phases of DDS modules is under development and will be presented. |
| Fachbereich(e)/-gebiet(e): | 18 Fachbereich Elektrotechnik und Informationstechnik 18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Theorie Elektromagnetischer Felder (ab 01.01.2019 umbenannt in Institut für Teilchenbeschleunigung und Theorie Elektromagnetische Felder) 18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Theorie Elektromagnetischer Felder (ab 01.01.2019 umbenannt in Institut für Teilchenbeschleunigung und Theorie Elektromagnetische Felder) > Beschleunigertechnik (bis 31.12.2018) |
| Hinterlegungsdatum: | 15 Dez 2016 13:15 |
| Letzte Änderung: | 24 Aug 2023 09:41 |
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