Observing single electron pulses provides insight into the mechanism that leads to sudden high current jumps (breakdown) in aged wire chambers. This single electron activity is found to be consistent with the Fowler-Nordheim equation for field emission of electrons from a cathode surface in a high electric field. The high electric field arises from the positive ion buildup on a very thin insula...

Continuous measurement of soil NO emissions is needed to constrain NO budget and emission factors. Here, we describe the performance of a low-power Teledyne NO analyzer and automated chamber system, powered by wind and solar, that can continuously measure soil NO emissions. Laboratory testing of the analyzer revealed significant temperature sensitivity, causing zero drift of -10.6 nmol mol °C. ...

The ionization of the gas molecules by X-rays results in electron-ion pair production. The positive ions need several milliseconds to move from the generation position to the cathode. Conversely, the electrons require few microseconds to reach the anode plates. The accumulation of the positive ions inside the active volume, according to their slower drift, leads to space charge effect which has...

The hiARK III detector is shown in Figs. l(a) and l(b). The detector is described in Ref. 1 and its main subsystems are described in Refs. 2-6. Briefly, working out from the interaction point, the detector consists of an inner trigger chamber, followed by a large drift chamber, a time-of-flight (TOF) counter system, a gas sampling cylindrical shower counter, a solenoidal coil which generates an...

Some recent results are reported from the ARGUS experiment, operated at the e+estorage ring DORIS Il at DESY. In an updated analysis of semileptonic b u decays direct evidence for such transitions was obtained through reconstruction of a complete event. A study of the lepton energy spectra in +-+ E-UP and z+ P-I+ decays yielded a value for the Michel parameter which is in good agreement with a ...

The abundances of cosmic-ray helium isotopes between 0.2 and 3.7 GeV nucleon~1 were measured by the Isotope Matter Antimatter Experiment (IMAX) during a Ñight from Lynn Lake, Manitoba, Canada on 1992 July 16È17. The IMAX balloon-borne magnetic spectrometer realized a direct measurement of the charge, the velocity, and the rigidity of cosmic rays using plastic scintillators, a high-resolution ti...

Abstract A new small-diameter Monitored Drift Tube (sMDT) chamber has been developed for the muon spectrometer of ATLAS experiment to handle higher collision rates expected at CERN High Luminosity Large Hadron Collider (HL-LHC). This paper presents measurements tracking resolution and hit efficiency two prototype sMDT chambers constructed University Michigan. Using cosmic-ray muons 103.7 ± 8.1 ...

Abstract This work investigates the processes of dissipation charge and energy a pulsed electron beam in gas compositions (nitrogen, carbon dioxide oxygen) presence ammonium sulphate nitrate. A generated by TEA-500 accelerator (Tomsk, Russia) with an up to 410 keV, current 5 kA ( I 0 ), half-amplitude voltage pulse duration 60 ns was injected into 46 cm long drift chamber filled mixture. The FC...