Fast gas mixtures for gas-filled particle detectors

Christophorou, L. G.; McCorkle, D.L.; Maxey, D.V.; Carter, J.G.

doi:10.1016/0029-554x(79)90042-9

Cited by 160 publications

(45 citation statements)

References 29 publications

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“…One can see that even a small admixture of DME (5?7') o re d uces the drift velocity considerably. Figure 5(a) shows that our CF4 drift velocity data agree well with results of Schmidt [33], but not as well with results of Christophorou [34] and Hunter [35]. At higher electric fields the discrepancy among published data is larger, as can be seen in fig.…”

Section: Drift Velocity and Longitudinal Difusion In Cfd-based Gasessupporting

confidence: 77%

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Measurement of electron drift parameters for helium and CF4-based gases

Va’vra

Coyle

Kadyk

et al. 1993

Nuclear Instruments and Methods in Physics Research Section A:

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We-have studied various helium and CF4 -based gas mixtures, which may have . important applications for the SSC, Phi, Charm-Tau, and B factories. We present an integrated set of measurements, which includes the drift velocity, longitudinal single electron diffusion, characteristic electron energy, single electron pulse height spectra, operating wire gain, relative cathodic breakdowns in different gases, effect of water addition on the drift parameters, impurity problems in the CFd-based gases, diffusion near the wire and wire aging. The data are compared to predictions based on electron transport theories.

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Section: Drift Velocity and Longitudinal Difusion In Cfd-based Gasessupporting

confidence: 77%

“…The probability for this process peaks at an electron energy of about 6-7 eV [34], i.e., __ ..-the &ocess 'occurs only very near the wire. The i&H10 admixture will tend to lower I :…”

Section: Wire Agingmentioning

confidence: 99%

Measurement of electron drift parameters for helium and CF4-based gases

Va’vra

Coyle

Kadyk

et al. 1993

Nuclear Instruments and Methods in Physics Research Section A:

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“…for the high electron drift velocity [42]. The operational gas pressure can 267 be varied up to 100 mbar, depending on the incident ion energy and on the 268 species to be detected.…”

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confidence: 99%

The experimental set-up of the RIB in-flight facility EXOTIC

Pierroutsakou

Boiano

et al. 2016

Nuclear Instruments and Methods in Physics Research Section A:

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We describe the experimental set-up of the Radioactive Ion Beam (RIB) in-flight facility EXOTIC consisting of: a) two position-sensitive Parallel Plate Avalanche Counters (PPACs), dedicated to the event-by-event tracking of the produced RIBs and to time of flight measurements; b) the new high-granularity compact telescope array EXPADES (EXotic PArticle DEtection System), designed for nuclear physics and nuclear astrophysics experiments employing low-energy light RIBs. EXPADES consists of eight ∆E-E res telescopes arranged in a cylindrical configuration around the target. Each telescope is made up of two Double Sided Silicon Strip Detectors (DSSSDs) with a thickness of 40/60 µm and 300 µm for the ∆E and E res layer, respectively. Additionally, eight ionization chambers were constructed to be used as an alternative ∆E stage or, in conjunction with the entire DSSSD array, to build up more complex triple telescopes. New low-noise multi-channel chargesensitive preamplifiers and spectroscopy amplifiers, associated with constant frac-

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“…While the fluctuation of P10 is consistent with the statistic error from the number of drift electrons, the fluctuation of CF 4 is significantly larger than expected from statistics alone. This is most probably due to the absorption of electrons via dissociative attachment in the high field region near the anode wires [9,10]. These attachment processes in CF 4 are:…”

Section: Gain Fluctuationmentioning

confidence: 99%