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Title: The development of a fast intra-train beam-based feedback system capable of operating on the bunch trains of the International Linear Collider
Author: Bett, Douglas Robert
Awarding Body: University of Oxford
Current Institution: University of Oxford
Date of Award: 2013
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This thesis will describe the latest work from the Feedback On Nanosecond Timescales project, commonly known as FONT. The goal of the FONT project is the development of a beamline feedback system to be installed at the interaction point (IP) of a future linear collider in order to maximize the luminosity that can be achieved. The prototype FONT feedback system is beam-based, meaning that the correction is determined from direct measurement of the position of the beam, and intra-train, meaning that the correction is applied within the duration of the current bunch train. The FONT system, consisting of three stripline beam position monitors, a digital processor unit built around a Field Programmable Gate Array (FPGA) and a pair of electromagnetic kickers, is described. Recent improvements to the position measurement process are detailed and the performance of the feedback system is presented. The modification of the firmware to operate on a machine with a large number of bunch trains, such as the International Linear Collider, is described and the design is verified through the use of a laboratory test bench developed to simulate such a machine. The FONT5 digital board is proved capable of operating on a train resembling the specification for the International Linear Collider: 2820 bunches separated in time by 308 ns.
Supervisor: Burrows, Philip Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: Physical Sciences ; Physics ; Particle physics ; accelerator ; beam ; linear collider ; feedback