High-intensity beam profile measurement using a gas sheet monitor by beam induced fluorescence detection
| Autor: | Pranab Saha, Katsuhiro Moriya, Motoi Wada, Ippei Yamada, Junichiro Kamiya, Michikazu Kinsho |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Physics and Astronomy (miscellaneous) High intensity Image (category theory) Flux Surfaces and Interfaces Fluorescence Beam pulse Root mean square Physics::Accelerator Physics lcsh:QC770-798 lcsh:Nuclear and particle physics. Atomic energy. Radioactivity Atomic physics Intensity (heat transfer) Beam (structure) |
| Zdroj: | Physical Review Accelerators and Beams, Vol 24, Iss 4, p 042801 (2021) |
| ISSN: | 2469-9888 |
| Popis: | A transverse beam profile monitor that visualizes a two-dimensional beam-induced fluorescent image was developed. The monitor employs a sheet-shaped gas flow formed by a technique of rarefied gas dynamics. A simplified analysis method was developed to reconstruct the beam intensity profile from the obtained image. The developed profile monitor and the analysis method were applied to measure the J-PARC 3 MeV ${\mathrm{H}}^{\ensuremath{-}}$ beam profile. The root mean square values of the profiles were consistent with the ones obtained by a wire-scanning-type beam profile monitor. The beam loss due to the gas sheet injection was measured as a beam-current reduction. The amount of the beam current decreased in proportion to the gas sheet flux and the reduction ranged from 0.004 to 2.5%. The assembled system was capable of reconstructing a beam profile from a single shot beam pulse ($1.7\ifmmode\times\else\texttimes\fi{}{10}^{13}$ protons in $50\text{ }\text{ }\ensuremath{\mu}\mathrm{s}$). |
| Databáze: | OpenAIRE |
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