Experimental Ion Mobility measurements in Ne-CO2 and CO2-N-2 mixtures


Encarnacao P. M. C. C., Cortez A. F. V., Veenhof R., Neves P. N. B., Santos F. P., Trindade A. M. F., ...Daha Fazla

JOURNAL OF INSTRUMENTATION, cilt.11, 2016 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 11
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1088/1748-0221/11/05/p05005
  • Dergi Adı: JOURNAL OF INSTRUMENTATION
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Bursa Uludağ Üniversitesi Adresli: Hayır

Özet

In this paper we present the experimental results for the mobility, K-0, of ions in neon-carbon dioxide (Ne-CO2) and carbon dioxide-nitrogen (CO2-N-2) gaseous mixtures for total pressures ranging from 8-12 Torr, reduced electric fields in the 10-25 Td range, at room temperature. Regarding the Ne-CO2 mixture only one peak was observed for CO2 concentrations above 25%, which has been identified as an ion originated in CO2, while below 25% of CO2 a second-small peak appears at the left side of the main peak, which has been attributed to impurities. The mobility values for the main peak range between 3.51 +/- 0.05 and 1.07 +/- 0.01 cm(2)V(-1)s(-1) in the 10%-99% interval of CO2, and from 4.61 +/- 0.19 to 3.00 +/- 0.09 cm(2)V(-1)s(-1) for the second peak observed (10%-25% of CO2). For the CO2-N-2, the time-of-arrival spectra displayed only one peak for CO2 concentrations above 10%, which was attributed to ions originated in CO2, namely CO2+ (CO2), with a second peak appearing for CO2 concentrations below 10%. This second peak, with higher mobility, was attributed to CO2+ ions. The mobility values of the main peak range between 2.11 +/- 0.04 and 1.10 +/- 0.03 cm(2)V(-1)s(-1) in the 1%-99% interval of CO2, while the second peak's from 2.26 +/- 0.02 and 1.95 +/- 0.04 cm(2)V(-1)s(-1) (1%-10% of CO2). The inverse of the mobility displays an aproximately linear dependence on the CO2 concentration in the mixture.