Measurement of spatial resolutions and drift velocities in a drift-chamber filled with a helium-DME mixture

Cindro, V.; Kolanoski, H.; Lange, A.; Lauterjung, D.; Müller, F.; Siegmund, Thomas; Söder, W.; Thurn, H.

doi:10.1016/0168-9002(91)90244-k

Cited by 18 publications

(2 citation statements)

References 22 publications

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“…Bradbery-Nielsen technique was used in electron drift velocity measurements performed by Cottrell and Walker [10] and F. Villa [11]. Cindro and coworkers measured drift velocity in pure gas as well as in its mixtures with He [12], while Oettinger and coworkers measured drift velocity in pure gas and DME/Ar and DME/Ne mixtures [13]. Townsend ionization coefficient was measured by Cottrell and Walker [14], Sharma and Sauli [15] in pure DME and by Oettinger and coworkers in pure DME, as well as in DME/Ar and DME/Ne mixtures [13].…”

Section: Introductionmentioning

confidence: 99%

Cross sections and transport coefficients for electrons in C2H6O and its mixtures with Ar and Ne

et al. 2022

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In this paper, we show and discuss a set of cross sections for electron collisions with dimethyl ether (DME, C2H6O) obtained by the standard swarm analysis of experimental data for drift velocities and ionization coefficients measured in pure DME and its mixtures with Ar and Ne by E. Oettinger and coworkers. While the existing cross section set gave relatively good predictions for drift velocities, it proved necessary to modify the inelastic cross sections in order to achieve a better agreement with drift velocities in gas mixtures and a good agreement for the ionization coefficient. Furthermore, the derived set of cross sections was used to calculate the electron transport and rate coefficients under the influence of a constant electric field and crossed electric and magnetic DC and RF orthogonal configuration fields. The effect of the magnitude and frequency of the fields on electron transport was studied separately. Our work has resulted in a database of collision and transport data which can be used in modeling of both DC and RF discharges and plasma applications containing pure DME and its mixtures. Graphical abstract

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Section: Introductionmentioning

confidence: 99%

Cross sections and transport coefficients for electrons in C2H6O and its mixtures with Ar and Ne

et al. 2022

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“…Resolutions of 260 pm have been achieved in helium-propane mixtures [l], and recently measurements have been made on helium-DME and helium-COz-isobutane mixtures [2,3]. In this paper, we describe our results on studies of helium-COZ-isobutane gas mixtures in a prototype drift chamber.…”

Section: Introductionmentioning

confidence: 99%

Studies of helium gas mixtures in drift chambers

Burchat

Hiser

Boyarski

et al. 1992

Nuclear Instruments and Methods in Physics Research Section A:

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Some properties of gas mixtures, composed predominately of helium and lesser amounts of CO2 and isobutane, were measured in a prototype drift chamber. The studies are motivated by the desire to reduce the multiple scattering inside the drift chamber at future high-luminosity, low-energy facilities such as 4 factories, T/charm factories, and B factories. The low atomic number of helium greatly reduces the multiple scattering contribution to the momentum resolution compared to an argon-based gas mixture. The position resolution, pulse height, efficiency, and breakdown characteristics were measured for various gas mixtures. A mixture of 83% He, 10% CO2, and 7% isobutane gives comparable results to that of an argon-based gas commonly used in drift chambers.

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Studies of helium based drift chamber gases for high-luminosity low energy machines

Boyarski

Briggs

Burchat

1992

Nuclear Instruments and Methods in Physics Research Section A:

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Measurement of spatial resolutions and drift velocities in a drift-chamber filled with a helium-DME mixture

Cited by 18 publications

References 22 publications

Cross sections and transport coefficients for electrons in C2H6O and its mixtures with Ar and Ne

Cross sections and transport coefficients for electrons in C2H6O and its mixtures with Ar and Ne

Studies of helium gas mixtures in drift chambers

Studies of helium based drift chamber gases for high-luminosity low energy machines

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