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| Título: | Beam tracking with micromegas & wire chambers in secondary electron detection configuration |
Autor: | Voštinar, M.; Fernández-Martínez, Begoña CSIC ORCID; Álvarez, M. A. G. CSIC | Fecha de publicación: | 2013 | Editor: | Institute of Physics Publishing | Citación: | Journal of Instrumentation 8: C12023 (2013) | Resumen: | The focal plane of S3 (Super Separator Spectrometer), a new experimental area of SPIRAL2 at GANIL, will be used for identification of nuclei, and requires the reconstruction of their trajectories and velocities by the Time Of Flight (TOF) method. Classical tracking detectors used in-beam would generate a lot of angular and energy straggling due to their thickness. One solution is the use of a SED (Secondary Electron Detection), which consists of a thin emissive foil in beam coupled to a low pressure gaseous detector out of the beam, for the detection of secondary electrons ejected from the foil. Moreover, this type of detector can be used for classical beam tracking at low energies, or for example at NFS (GANIL) for the FALSTAFF experiment for the reconstruction of fission fragments trajectories. Several low pressure gaseous detectors such as wire chambers and Micromegas have been constructed and tested since 2008. High counting rate capabilities and good time resolution obtained in previous tests motivated the construction of a new real-size 2D prototype wire chamber and a 2D bulk Micromegas at low pressure. For the first time, spatial resolution of the Micromegas at low pressure (below 20 mbar) in the SED configuration was measured. Different tests have been performed in order to characterize time and spatial properties of both prototypes, giving spatial resolution in the horizontal (X) direction of 0.90(0.02) mm FWHM for the real size prototype and 0.72(0.08) mm FWHM for Micromegas, and a time resolution of ~ 110(25) ps for the real size prototype. | Descripción: | Trabajo presentado a la: "3rd International Conference on Micro Pattern Gaseous Detectors (MPGD2013)", celebrada en Zaragoza (España) del 1 al 4 de julio de 2013.-- et al. | URI: | http://hdl.handle.net/10261/123015 | DOI: | 10.1088/1748-0221/8/12/C12023 | Identificadores: | doi: 10.1088/1748-0221/8/12/C12023 e-issn: 1748-0221 |
| Aparece en las colecciones: | (CNA) Artículos |
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