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TU1I1 |
3D Printing (Additive Manufacturing) Applied to Accelerator Components |
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- T. Torims
Riga Technical University, Riga, Latvia
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The speaker did not provide an abstract.
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Slides TU1I1 [60.918 MB]
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TU1C2 |
Surface Treatment Procedures to Mitigate Ion-Induced Desorption in Heavy Ion Accelerators |
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- V. Velthaus, M. Bender, C. Trautmann
GSI, Darmstadt, Germany
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Ion-induced desorption is a serious limitation for stable operation of high beam intensities in heavy ion synchrotrons. Next generation heavy ion accelerators like FAIR or SPIRAL2 are designed for intensities that are orders of magnitude higher than the intensity of existing machines. Hence, ion-induced desorption becomes a big challenge. To better understand and control the influence of material and surface factors, desorption measurements with swift heavy ions (Ca and Au at 4.8 MeV/u) were conducted with focus on oxygen-free copper and tungsten samples. The surfaces were treated by different combinations of milling, lapping, polishing, etching and sputtering. Some of the samples were coated by carbon, titanium nitride or TiZrV. For all tested samples desorption yields (number of released molecules per impacting ion) for H2, H2O, CO, CO2, O2 and Ar will be presented. For copper, surface cleaning by sputtering with 5 keV argon ions reduces the desorption yield significantly. Another promising method to reduce ion-induced desorption is thermal annealing at 400 °C for about 4 h under ultra-high vacuum conditions. Suitable annealing and cleaning parameters will be presented.
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Slides TU1C2 [2.891 MB]
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TU1C3 |
Turbopumps: Lowest Vibration and Highest Uptime Made with Laser Balancing Technology |
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- A. Hannweg
Pfeiffer Vacuum GmbH, Asslar, Germany
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The balance quality of a rotor has an influence on its uptime and vibration. With a rotor speed of up to 1500 Hz, it is particularly large for turbopumps, which therefore are sensitive to the smallest mass unbalances. A certain unbalance cannot be completely avoided, which will always lead to a rotating radial force and thus vibrations. Reducing the unbalance is a necessity for the safe and reliable operation of turbopumps and has a positive impact on numerous vibration sensitive applications. Furthermore, the reduction of the radial forces extends the lifetime of the bearing that supports the rotor, which lowers the maintenance frequency. In the past, the best balance was achieved by adding additional mass (balancing screws), or by removing mass with machining processes. The latest and currently most efficient method is Laser Balancing, where the unbalance compensation is achieved by removing rotor material in the form of segments with the technique of laser ablation. This innovative technology was developed and patented by Pfeiffer Vacuum.
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| TU1C4 |
A 3D Printed IH-Type Linac Structure - Proof-of-Concept for Additive Manufacturing of Linac RF Cavities |
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- H. Hähnel, A. Ateş, U. Ratzinger
IAP, Frankfurt am Main, Germany
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Funding: This research was funded by BBMBF grant number 05P21RFRB2.
Additive manufacturing ("AM" or "3D printing") has become a powerful tool for rapid prototyping and manufacturing of complex geometries. A 433 MHz IH-DTL cavity has been constructed to act as a proof of concept for additive manufacturing of linac components. In this case, the internal drift tube structure has been produced from 1.4404 stainless steel using 3D printing. We present the concept of the cavity as well as first results of vacuum testing and materials testing. Vacuum levels sufficient for linac operation have been reached with the AM linac structure.
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Slides TU1C4 [5.326 MB]
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-HIAT2022-TU1C4
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| About • |
Received ※ 20 June 2022 — Revised ※ 30 June 2022 — Accepted ※ 10 August 2022 — Issue date ※ 20 September 2022 |
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