Erratum: Micromegas-TPC operation at high pressure in xenon-trimethylamine mixtures (Journal of Instrumentation (2013) 8 (P01012))

Cebrián, S. (Universidad de Zaragoza) ; Dafni, T. (Universidad de Zaragoza) ; Ferrer-Ribas, E. ; Giomataris, I. ; Gonzalez-Diaz, D. (Universidad de Zaragoza) ; Gómez, H. ; Herrera, D.C. ; Iguaz, F.J. (Universidad de Zaragoza) ; Irastorza, I.G. (Universidad de Zaragoza) ; Luzon, G. (Universidad de Zaragoza) ; Rodríguez, A. ; Segui, L. ; Tomás, A.

Resumen: During the investigations performed after the publication of the original article, a mistake in the calibration procedure was revealed, resulting in a 50% relative increase of the estimate of the concentration of trimethylamine (TMA) in the mixtures employed. In this erratum we provide the correct concentrations after a careful re-evaluation, and therefore the statistical and systematic uncertainties are now included. The calibration procedure was performed by pre-mixing TMA with Xenon for known concentrations of the former in the range 0.5% to 50%. Several external conditions were altered, like the time before sampling and the time required for proper mixing (done with a recirculation pump), yielding deviations of about 10%. The overall statistical uncertainty was obtained from the one derived for the calibration factor, once combined with the statistical uncertainty in the estimate of the most prominent peaks of the involved species: TMA(A = 59) and Xe(A = 132), illustrated in figure 1. Generally, where it had been previously stated that the optimum for operation of Micromegas (i.e., maximum Penning transfer before excessive electron cooling) corresponded to about 1:5%TMA admixture, it should be modified to ~1%TMA after this revision. A compilation of the new concentrations can be be found in tables

Idioma: Inglés

DOI: 10.1088/1748-0221/10/07/E07001

Año: 2015

Publicado en: Journal of Instrumentation 10, 7 (2015), [4 pp]
ISSN: 1748-0221

Factor impacto JCR: 1.31 (2015)

Categ. JCR: INSTRUMENTS & INSTRUMENTATION rank: 28 / 56 = 0.5 (2015) - Q2 - T2

Factor impacto SCIMAGO: 0.833 - Instrumentation (Q1) - Mathematical Physics (Q2)

Tipo y forma: Article (Published version)

Área (Departamento): Área Física Atóm.Molec.y Nucl. (Dpto. Física Teórica)