X-ray detection with Micromegas with background levels below 10$^{-6}$ keV$^{-1}$cm$^{-2}$s$^{-1}$

Aune, S.; Jourde, D.; Galán, J.; Mols, J.P.; Herrera, D.C.; Geralis, T.; Dafni, T.; Tomás, A.; Vafeiadis, T.; Irastorza, I.G.; Fanourakis, G.; Mirallas, H.; Diago, A.; Calvet, D.; Seguí, L.; Ferrer-Ribas, E.; Yildiz, S.C.; Gardikiotis, A.; Rodríguez, A.; Garza, J.G.; García, J.A.; González-Díaz, D.; Papaevangelou, T.; Aznar, F.; Iguaz, F.J.; Druillole, F.; Giomataris, I.; Luzón, G.; Gómez, H.

doi:10.1088/1748-0221/8/12/C12042

Article
Report number	arXiv:1312.4282
Title	X-ray detection with Micromegas with background levels below 10$^{-6}$ keV$^{-1}$cm$^{-2}$s$^{-1}$
Author(s)	Aune, S. (Saclay) ; Aznar, F. (Zaragoza U.) ; Calvet, D. (Saclay) ; Dafni, T. (Zaragoza U.) ; Diago, A. (Zaragoza U.) ; Druillole, F. (Saclay) ; Fanourakis, G. (Democritos Nucl. Res. Ctr.) ; Ferrer-Ribas, E. (Saclay) ; Galán, J. (Zaragoza U.) ; García, J.A. (Zaragoza U.) ; Gardikiotis, A. (Patras U.) ; Garza, J.G. (Zaragoza U.) ; Geralis, T. (Patras U.) ; Giomataris, I. (Saclay) ; Gómez, H. (Zaragoza U.) ; González-Díaz, D. (Zaragoza U.) ; Herrera, D.C. (Zaragoza U.) ; Iguaz, F.J. (Saclay ; Zaragoza U.) ; Irastorza, I.G. (Zaragoza U.) ; Jourde, D. (Saclay) ; Luzón, G. (Zaragoza U.) ; Mirallas, H. (Zaragoza U.) ; Mols, J.P. (Saclay) ; Papaevangelou, T. (Saclay) ; Rodríguez, A. (Zaragoza U.) ; Seguí, L. (Zaragoza U.) ; Tomás, A. (Zaragoza U.) ; Vafeiadis, T. (CERN) ; Yildiz, S.C. (Dogus U., Kadikoy ; Bogazici U.)
Publication	2013-12-23
Imprint	16 Dec 2013
Number of pages	14
In:	JINST 8 (2013) C12042
In:	3rd International Conference on Micro Pattern Gaseous Detectors, Zaragoza, Spain, 1 - 6 Jul 2013, pp.C12042
DOI	10.1088/1748-0221/8/12/C12042
Subject category	Detectors and Experimental Techniques
Abstract	Micromegas detectors are an optimum technological choice for the detection of low energy x-rays. The low background techniques applied to these detectors yielded remarkable background reductions over the years, being the CAST experiment beneficiary of these developments. In this document we report on the latest upgrades towards further background reductions and better understanding of the detectors' response. The upgrades encompass the readout electronics, a new detector design and the implementation of a more efficient cosmic muon veto system. Background levels below 10$^{-6}$keV$^{-1}$cm$^{-2}$s$^{-1}$ have been obtained at sea level for the first time, demonstrating the feasibility of the expectations posed by IAXO, the next generation axion helioscope. Some results obtained with a set of measurements conducted in the x-ray beam of the CAST Detector Laboratory will be also presented and discussed.
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