Browsing by Author "Cortez, A. F. V."

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    Cluster ions in gas-based detectors
    (IOP Publishing, 2015-07-01) Arslandok, Mesut; Cortez, A. F. V.; Veenhof, R.; Kalkan, Yalçın; Kaya, Yunus; Tapana, I.; Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Fizik Bölümü.; Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Kimya Bölümü.; 000-0001-8469-8132; 0000-0002-6624-2884; AAH-3852-2020; 56736206100; 35181446100; 8905787000
    Avalanches in gas-based detectors operating at atmospheric pressure and using Ar-CO2 or Ne-CO2 as drift medium produce in a first instance mainly Ar+, Ne+ and CO2+ ions. The noble gas ions transfer their charge to CO2 in a few ns. A few ns later, the CO2+ ions have picked up CO2 molecules, forming cluster ions, in particular CO2+ center dot (CO2)(n). Since the cluster ions are slower than the initial ions, the signals induced by ion motion are altered. The effect is shown to be present in constant-field detectors and TPC readout chambers, and is expected to affect devices such as Micromegas and drift tubes.