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Generation of RF Frequency and Phase References on the FAIR Site

Zipfel, Bernhard ; Klingbeil, Harald ; Laier, Ulrich ; Ningel, Klaus-Peter ; Schäfer, S. ; Thielmann, Christof ; Hartel, Uta ; Lens, Dieter Etienne Mia (2022):
Generation of RF Frequency and Phase References on the FAIR Site. (Publisher's Version)
In: International Particle Accelerator Conference, 5, In: IPAC2014: Proceedings of the 5th International Particle Accelerator Conference, pp. 3131-3133,
Darmstadt, Joint Accelerator Conferences Website, IPAC2014: 5th International Particle Accelerator Conference, Dresden, 15.-20.06.2014, ISBN 978-3-95450-132-8,
DOI: 10.26083/tuprints-00020324,
[Conference or Workshop Item]

Abstract

Based on the Bunch Phase Timing System (BuTiS) local analog radio frequency reference signals (RF references) like the particle revolution frequency and their multiple harmonics will be generated. These references are used to control the phase of the accelerator cavities to altering harmonics of the bunch revolution frequency. Delay or phase shifts from the FAIR-Center to references at the BuTiS endpoints are already compensated by the BuTiS receivers. Phase shifts from the RF reference generators to LLRF electronics can be compensated by controlling the output phases of the DDS modules of the RF references. However phase shift delays of multiple harmonics at the same interconnecting electrical path are not identical at the same time. Configurable electronics manage phase calibration of the RF references to their endpoints. Calibration may depend on frequency and harmonic of the RF reference, aging as well as on thermal effects. The electrical length and impedance of interconnecting cables for phase control loops can be compensated. This is an important feature, in particular if control loops are switched between different harmonic frequencies.

Item Type: Conference or Workshop Item
Erschienen: 2022
Creators: Zipfel, Bernhard ; Klingbeil, Harald ; Laier, Ulrich ; Ningel, Klaus-Peter ; Schäfer, S. ; Thielmann, Christof ; Hartel, Uta ; Lens, Dieter Etienne Mia
Origin: Secondary publication service
Status: Publisher's Version
Title: Generation of RF Frequency and Phase References on the FAIR Site
Language: English
Abstract:

Based on the Bunch Phase Timing System (BuTiS) local analog radio frequency reference signals (RF references) like the particle revolution frequency and their multiple harmonics will be generated. These references are used to control the phase of the accelerator cavities to altering harmonics of the bunch revolution frequency. Delay or phase shifts from the FAIR-Center to references at the BuTiS endpoints are already compensated by the BuTiS receivers. Phase shifts from the RF reference generators to LLRF electronics can be compensated by controlling the output phases of the DDS modules of the RF references. However phase shift delays of multiple harmonics at the same interconnecting electrical path are not identical at the same time. Configurable electronics manage phase calibration of the RF references to their endpoints. Calibration may depend on frequency and harmonic of the RF reference, aging as well as on thermal effects. The electrical length and impedance of interconnecting cables for phase control loops can be compensated. This is an important feature, in particular if control loops are switched between different harmonic frequencies.

Book Title: IPAC2014: Proceedings of the 5th International Particle Accelerator Conference
Series: International Particle Accelerator Conference
Series Volume: 5
Place of Publication: Darmstadt
Publisher: Joint Accelerator Conferences Website
ISBN: 978-3-95450-132-8
Divisions: 18 Department of Electrical Engineering and Information Technology
18 Department of Electrical Engineering and Information Technology > Institut für Automatisierungstechnik und Mechatronik
18 Department of Electrical Engineering and Information Technology > Institut für Automatisierungstechnik und Mechatronik > Control Methods and Robotics
Event Title: IPAC2014: 5th International Particle Accelerator Conference
Event Location: Dresden
Event Dates: 15.-20.06.2014
Date Deposited: 14 Jan 2022 13:36
DOI: 10.26083/tuprints-00020324
URL / URN: https://tuprints.ulb.tu-darmstadt.de/20324
URN: urn:nbn:de:tuda-tuprints-203240
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