Soft X-ray measurements with a gas detector coupled to microchips in laser-plasma experiments at VEGA-2
| Autor: | F. Murtas, Dimitri Batani, Luca Volpe, G. Zerauili, A. Romano, O. Turianska, J. A. Perez-Hernandez, D. Pacella, S. Malko, D. Raffestin, Francesco Cordella, G. Claps |
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| Přispěvatelé: | Centre d'Etudes Lasers Intenses et Applications (CELIA), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Bordeaux (UB), Claps, G., Cordella, F., Pacella, D., Romano, A., Murtas, F., Batani, D., Turianska, O., Raffestin, D., Volpe, L., Zerauili, G., Perez-Hernandez, J. A., Malko, S., Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
MICROPIC
Materials science Physics::Instrumentation and Detectors CMOS readout of gaseous detectors Micropattern gaseous detectors (MSGC GEM THGEM RETHGEM MHSP MICROPIC MICROMEGAS InGrid etc) Nuclear instruments and methods for hot plasma diagnostics X-ray detectors X-ray detector Nuclear instruments and methods for hot plasma diagnostic CMOS readout of gaseous detector 7. Clean energy 01 natural sciences law.invention Micropattern gaseous detectors (MSGC Optics law 0103 physical sciences Gas detector [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] 010306 general physics Instrumentation Mathematical Physics etc) Soft x ray GEM 010308 nuclear & particles physics business.industry Vega Plasma Laser InGrid RETHGEM MICROMEGAS MHSP business THGEM |
| Zdroj: | JINST 3rd European Conference on Plasma Diagnostics 3rd European Conference on Plasma Diagnostics, May 2019, Lisbon, Portugal. pp.C02006, ⟨10.1088/1748-0221/15/02/C02006⟩ Journal of Instrumentation |
| ISSN: | 1748-0221 |
| DOI: | 10.1088/1748-0221/15/02/C02006⟩ |
| Popis: | International audience; This work presents an innovative usage of the GEMpix detector for soft X-rays (SXR) measurements aimed to make an estimate of the electron temperature of a Laser Produced Plasma (LPP). The GEMpix is a proportional gas detector based on three Gas Electron Multipliers (GEMs) with a Front-End Electronics (FEE) based on four Timepix chips. This FEE provides the Time over Threshold (ToT) acquisition mode pixel by pixel and then a digital measure of the released charge in the gas mixture. In addition, the charge can be amplified through the GEM foils with 4 orders of magnitude spanning gain offering, in this way, a big dynamic range and adjustable sensitivity. Chip design provides a threshold for each channel. All the thresholds are set in order to cut electronic noise and detect X-rays. In this configuration, a cut on the low amplitude signals is set, but the gain has been tuned in order to observe the main signal due to the soft X-rays reaching the detector. This detector works in an energy range between 2 to 15 keV . It offers good imaging properties, high efficiency and absolute calibration. It offers a good immunity to Electromagnetic Pulse (EMP), as checked at VEGA-2 laser facility (hundreds of TW in about 30 fs). In these experiments, where the formation of warm dense matter produced by blast waves has been studied, a measure of the plasma temperature was required. This measurement was realized applying some filters on the active area of the detector, in correspondence of three chips. With this configuration a study of the GEMpix response due to the photons coming from the coronal plasma produced by the laser on the target has been done for each single shot. GEMpix revealed innovative and attractive features, compared to the state of the art where passive films or detectors based on indirect conversion are used, for SXR imaging and spectral analysis to infer the electron temperature. |
| Databáze: | OpenAIRE |
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