Paper |
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WEP17 |
Electron Emission (SEM) Grids for the FAIR Proton Linac |
426 |
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- J. Herranz
Proactive Research and Development, Sabadell, Spain
- I. Bustinduy, Á. Rodríguez Páramo
ESS Bilbao, Zamudio, Spain
- P. Forck, T. Sieber
GSI, Darmstadt, Germany
- A. Navarro Fernandez
CERN, Meyrin, Switzerland
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New SEM-Grid has been developed for FAIR Proton Linac, the instrument consists of 2 harps fixed together in an orthogonal way. This SEM-Grid will provide higher resolution and accuracy measurements as each harp consists of 64 tungsten wires 100 micro-meter in diameter and 0.5 mm pitch. Each wire is fixed to a ceramic PCB with an innovative dynamic stretching system, this system assures wire straightness under typical thermal expansion due to beam heat deposition. Electric field distribution has been performed, 3 main parameters have been optimized, wires distribution, quantity of polarization electrodes and distance between electrodes and wires. The design and production of the SEM-Grids have been performed by the company Proactive R&D that has count on the expertise of ESS-Bilbao to define safe operation limits and signal estimation by means of a code developed specifically for this type of calculations. Preliminary validations of the first prototypes shown good values of electric field behaviour signal. After additional beam test validations to be performed on June 2022, final series of the SEM-Grid will be produced and installed on FAIR proton LINAC.
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DOI • |
reference for this paper
※ doi:10.18429/JACoW-IBIC2022-WEP17
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About • |
Received ※ 07 September 2022 — Revised ※ 15 September 2022 — Accepted ※ 18 September 2022 — Issue date ※ 22 September 2022 |
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WEP22 |
Experimental Investigation of Gold Coated Tungsten Wires Emissivity for Applications in Particle Accelerators |
438 |
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- A. Navarro Fernandez, M. Martin Nieto, F. Roncarolo
CERN, Meyrin, Switzerland
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The operation of wire grids and wire scanners as beam profile monitors can be heavily affected, both in terms of measurement accuracy and wire integrity, by the thermal response of the wires to the energy deposited by the charged particles. Accurate measurements of material emissivity are crucial, as Radiative Cooling represent the most relevant cooling process. In this work, we present a method for emissivity measurements of gold-coated tungsten wires based on calorimetric techniques. The dedicated electrical setup allowed allowed transient and steady state measurements for temperatures up to 2000 K. A theoretical description of the measurement technique will be followed up by the electrical set up description and a detailed discussion about the measured results and uncertainties.
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Poster WEP22 [1.586 MB]
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DOI • |
reference for this paper
※ doi:10.18429/JACoW-IBIC2022-WEP22
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About • |
Received ※ 06 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 13 September 2022 — Issue date ※ 16 September 2022 |
Cite • |
reference for this paper using
※ BibTeX,
※ LaTeX,
※ Text/Word,
※ RIS,
※ EndNote (xml)
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