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TUP25 | Simulation and Measurements of the Fast Faraday Cups at GSI UNILAC | electron, simulation, target, coupling | 286 |
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Funding: This work is supported by the German Federal Ministry of Education and Research (BMBF) under contract no. 05P21RORB2. Joint Project 05P2021 - R&D Accelerator (DIAGNOSE) The longitudinal charge profiles of the high intensity heavy ion beam accelerated at the GSI UNILAC upto 11.4 MeV/u can differ significantly in consecutive macro-pulses. Variations in bunch shape and mean energy were also observed within a single macro-pulse. In order to have an accurate and fast determination of bunch shape and its evolution within a macro-pulse, a study of fast Faraday Cup designs is underway at GSI. In this contribution, we present CST particle in cell (PIC) simulations of radially coupled co-axial Fast Faraday Cup (RCFFC) and conventional axially coupled FFC (ACFFC) design. The simulation results are compared to the measurements performed under comparable beam conditions primarily with RCFFCs. A rather large impact of secondary electron emission is observed in simulations and experiments. The biasing of the FFC central electrode as a mitigation mechanism on the measured profiles is discussed. |
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DOI • | reference for this paper ※ doi:10.18429/JACoW-IBIC2022-TUP25 | ||
About • | Received ※ 15 September 2022 — Revised ※ 17 September 2022 — Accepted ※ 25 October 2022 — Issue date ※ 02 November 2022 | ||
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TUP29 | ZnO(In) Scintillation Light Spectra Investigation for Heavy Ion Detector Application | radiation, detector, vacuum, proton | 294 |
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Funding: DLR financed this research within the framework of the ERA. Net RUS Plus Project RUSST2017-051 ZnO-based ceramics are known as promising scintillators exhibiting light emission in the ultraviolet (UV) spectral region (~390 nm) and ultrafast decay times (<1 ns). They are of great interest for applications in scintillation counters and screens at high-energy heavy ion accelerators. In this contribution, the deterioration of scintillating properties of ZnO-based ceramics subjected to heavy ion exposure at high doses is investigated. The scintillation light spectra of ZnO(In) as a function of fluence for 4.8 MeV/u 48Ca and 197Au ions were studied. We observed that the deterioration of the scintillation intensity with increasing fluence follows the Birks-Black model. * The results presented in this contribution are based on the work performed before the 24th of February, 2022. ** m.saifulin@gsi.de (corresponding author) |
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DOI • | reference for this paper ※ doi:10.18429/JACoW-IBIC2022-TUP29 | ||
About • | Received ※ 08 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 11 September 2022 — Issue date ※ 01 November 2022 | ||
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WE3I1 | Novel Fast Radiation-Hard Scintillation Detectors for Ion Beam Diagnostics | detector, radiation, site, experiment | 515 |
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Novel radiation-hard scintillators were developed in the last years based on indium-doped ZnO ceramic with an extremely short decay time below a ns. Fast counting detectors and fast screens were considered as potential beam diagnostic applications of this material. At the GSI/FAIR facility, scintillation detectors are commonly used for measuring the intensity and detailed time structure of relativistic heavy ion beams. The scintillating material is inserted directly into the beam path. Signals from individual ions are counted, providing systematic-error-free beam intensity information. Standard scintillators require frequent maintenance due to radiation damage. To address this limitation, a large area ZnO radiation-hard detector was developed. The prototype detector operates at orders of magnitude higher irradiation levels, at higher counting rates and has better time resolution compared to a plastic scintillator. In addition, the novel detector material opens the possibilities for applications in other beam diagnostic systems, for example, scintillation screens for transverse profile measurements. Therefore, ZnO scintillation ceramics are of general interest for beam diagnostics. | |||
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DOI • | reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WE3I1 | ||
About • | Received ※ 24 September 2022 — Revised ※ 24 October 2022 — Accepted ※ 25 October 2022 — Issue date ※ 27 November 2022 | ||
Cite • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | ||