Pulse height measurements and electron attachment in drift chambers operated with Xe, CO(2) mixtures

Andronic, A.; Appelshäuser, H.; Blume, C.; Braun-Munzinger, P.; Bucher, D.; Busch, O.; Ramirez, A.; Cătănescu, V.; Ciobanu, M.; Daues, H.; Devismes, A.; Emschermann, D.; Fateev, O.; Garabatos, C.; Herrmann, N.; Ivanov, M.; Mahmoud, T.; Peitzmann, T.; Petracek, V.; Petrovici, M.; Reygers, K.; Sann, H.; Santo, R.; Schicker, R.; Sedykh, S.; Shimansky, S.; Simon, R.; Smykov, L.; Soltveit, H.; Stachel, J.; Stelzer, H.; Tsiledakis, G.; Vulpescu, B.; Wessels, J.; Windelband, B.; Winkelmann, O.; Xu, C.; Zaudtke, O.; Zanevsky, Y. & Yurevich, V.

Abstract

We present pulse height measurements in drift chambers operated with Xe,CO2gas mixtures. We investigate the attachment of primary electrons on oxygen and SF6contaminants in the detection gas. The measurements are compared with simulations of properties of drifting electrons. We present two methods to check the gas quality: gas chromatography and55Fepulse height measurements using monitor detectors.