| Full text | |
| Author(s): |
Roque, R. C.
[1]
;
Natal da Luz, H.
[2]
;
Carramate, L. F. N. D.
[3]
;
Azevedo, C. D. R.
[3]
;
Mir, J. A.
[1]
;
Amaro, F. D.
[1]
Total Authors: 6
|
| Affiliation: | [1] Univ Coimbra, LIBPhys Dept Phys, P-3004516 Coimbra - Portugal
[2] Univ Sao Paulo, Inst Fis, Rua Matao 1371, Saco Paulo - Brazil
[3] Univ Aveiro, Phys Dept I3N, P-3810193 Aveiro - Portugal
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Journal of Instrumentation; v. 13, OCT 2018. |
| Web of Science Citations: | 0 |
| Abstract | |
A gaseous imaging detector based on a cascade of two non-standard gas electron multipliers (100 mu m thick GEM) was operated in five different krypton-based mixtures and the achievable position resolution was determined. The micropattern gaseous detector (MPGD) has an active area of 10 x 10 cm(2). The GEM foils are twice as thick as a standard GEM, being more robust to electric discharges and less prone to sparking-caused damage. Krypton, being the noble gas with the lowest value of intrinsic position resolution in the range 14-34 keV, is a good candidate for imaging applications based on gaseous detectors. Our measurements have confirmed that krypton-CO2 mixtures showed an improvement in position resolution above 18 keV and up to 30 keV relatively to Ar-CO2 mixtures. The MTF value at 10% in the energy range 22-24 keV was evaluated, being 0.5876(342)1p/cm for Ar-CO2 (70:30) and a maximum of 3.2702(15) 1p/cm for the Kr-CO2 (90:10) mixture. (AU) | |
| FAPESP's process: | 16/05282-2 - Development and applications of Micropattern gaseous detectors |
| Grantee: | Pedro Hugo Ferreira Natal da Luz |
| Support Opportunities: | Research Grants - Young Investigators Grants |