Journal Article

GSI-2024-00572

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Excitation signal optimization for minimizing fluctuations in knock out slow extraction

Niedermayer, P. (Corresponding author)GSI* ; Singh, R.GSI*

2024
Macmillan Publishers Limited, part of Springer Nature [London]

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Please use a persistent id in citations: doi:10.1038/s41598-024-60966-y  doi:10.15120/GSI-2024-00572

Abstract: The synchrotron is a circular particle accelerator used for high energy physics experiments, material and life science, as well as hadron cancer therapy. After acceleration to the desired energies, particle beams are commonly extracted from the synchrotron using the method of resonant slow extraction. The goal is to deliver a steady particle flux—referred to as spill—to experiments and treatment facilities over the course of seconds while slowly emptying the storage ring. Any uncontrolled intensity fluctuations in the spill are detrimental to the efficiency of beam usage, as they lead to detector pileups or detector interlocks, hindering experiments and cancer treatment. Among the most widely used extraction scheme in medical facilities is the Radio Frequency Knock Out (RF-KO) driven resonant slow extraction, where the stored beam is transversely excited with a radio frequency (RF) field and the spill intensity is controlled by the excitation signal strength. This article presents particle dynamics simulations of the RF-KO system with the focus on finding effective mechanism for minimizing the intensity fluctuations while maintaining a good extraction efficiency and other advantages of KO extraction. An improved beam excitation signal which optimizes these main objectives is found, and is rigorously compared experimentally with other commonly applied techniques.

Note: This article is licensed under a Creative Commons Attribution 4.0 International License

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Contributing Institute(s):

1. HESR (HES)
2. Beam Diagnostics (BEA)

Research Program(s):

1. 621 - Accelerator Research and Development (POF4-621) (POF4-621)
2. DFG project 491382106 - Open-Access-Publikationskosten / 2022-2024 / GSI Helmholtzzentrum für Schwerionenforschung (491382106) (491382106)
3. I.FAST - Innovation Fostering in Accelerator Science and Technology (101004730) (101004730)

Experiment(s):

1. External experiment at external facility/ no experiment at GSI (other)

Appears in the scientific report 2024

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