MIT LNS

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Using MIT's 1938 cyclotron as a 0-2 Tesla magnet, our group characterizes gas mixtures for use in the design of drift and other gas detectors in different magnetic and electric fields. This page was started by Yoshi Uchida and later was maintained by Blake Stacey. Special mixtures can be studied on request. We are happy to provide these data. Please reference us with the proper date.

Contents

• Database of measured velocities and angles
• MAGBOLTZ simulation
• Setup of experiment
• Group pictures
• References

This research is sponsored by the DOE under contract #DE-AC02-76-ER03069.

News:

• For ease of detector designers we will add the radiation length for each gas.
• For complete characterization we plan to give data for relative signal gain, and its sensitivity to voltage and density changes.
• We have temporarily removed the Xe:CH4(50:50) data from our database because of sparking in the detector chamber.
• We have updated the theoretical calculations for Ar:n-C5H12 using the newest cross-sections included in the MAGBOLTZ program.

Drift Gases R&D Database Search

Please choose the required options from among the following, and then submit your search request. We currently have the gas types as search options. Please advise us on other options that would be helpful. (Note: This section requires a forms-capable browser.)

Gas Types

Carrier gas helium (He) neon (Ne) argon (Ar) krypton (Kr) xenon (Xe) carbon tetraflouride (CF4)

Quencher methane (CH4) ethane (C2H6) propane (C3H8) butane (C4H10) isobutane (iC4H10) n-pentane (n-C5H12) hexane (C6H14) heptane (C7H16) butadiene (C4H6) isobutylene dimethyl ether (DME) vinyl methyl ether (VME)

Additive carbon dioxide (CO2) nitrogen (N2) water (H2O)

additional keywords restricting search: