Space charge in drift chambers operated with the Xe,CO2(15%) mixture

Andronic, A.; Appelshäuser, H.; Blume, C.; Braun‐Munzinger, P.; Bucher, D.; Busch, O.; Cătănescu, V.; Ciobanu, M.; Daues, H.; Emschermann, D.; Fateev, O.; Foka, Yiota; Garabatos, C.; Gunji, T.; Herrmann, N.; Inuzuka, M.; Kislov, E. M.; Lindenstruth, V.; Ludolphs, W.; Mahmoud, T.; Petráček, V.; Petrovici, M.; Rusanov, I.; Sandoval, A.; Santo, R.; Schicker, R.; Simon, R.S.; Smykov, L.; Soltveit, H. K.; Stachel, J.; Stelzer, H.; Tsiledakis, G.; Vulpescu, B.; Wessels, J. P.; Windelband, B.; Xu, C.; Zaudtke, O.; Zanevsky, Y.; Yurevich, V. I.

doi:10.1016/j.nima.2004.01.076

Cited by 10 publications

(6 citation statements)

References 22 publications

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“…We observe several effects that we account for in the correction. All in all, the effects are similar to space-charge effects [18,19]. First, we see a strong nonlinearity for ions, which produce large numbers of secondary electrons.…”

Section: Design and Simulation Of The Ams-02 Trdsupporting

confidence: 55%

Monte Carlo simulations of the transition radiation detector of the AMS-02 experiment

Räihä

Bachlechner

Beischer

et al. 2017

Nuclear Instruments and Methods in Physics Research Section A:

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The Transition Radiation Detector of the AMS-02 experiment on the International Space Station is used for the separation of cosmic-ray positrons and electrons from protons and anti-protons, and for the identification of nuclei up to carbon (Z ≤ 6). We present the Geant4 simulation that is used to describe the ionization and transition radiation processes and compare its results to flight data from AMS-02. After applying empirical corrections to the simulated data, the particle energy deposition and likelihood distributions in the TRD are described with high accuracy.

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Section: Design and Simulation Of The Ams-02 Trdsupporting

confidence: 55%

Monte Carlo simulations of the transition radiation detector of the AMS-02 experiment

Räihä

Bachlechner

Beischer

et al. 2017

Nuclear Instruments and Methods in Physics Research Section A:

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show abstract

“…Each detector element consists of a fiber sandwich radiator of 48-mm thickness [39], a drift section of 30-mm thickness, and a multiwire proportional chamber section (7-mm thickness) with pad readout. The gas is a mixture of Xe (85%) and CO 2 (15%) [40][41][42][43]. The scope of the TRD is to provide a good separation of electrons from pions, particularly for momenta above 1 GeV=c.…”

Section: Alice Setupmentioning

confidence: 99%

Measurement of electrons from semileptonic heavy-flavor hadron decays inppcollisions ats=7 TeV

Abelev¹,

Adam²,

Adamová³

et al. 2012

Phys. Rev. D

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The differential production cross section of electrons from semileptonic heavy-flavor hadron decays has been measured at midrapidity (jyj < 0:5) in proton-proton collisions at ffiffi ffi s p ¼ 7 TeV with ALICE at the LHC. Electrons were measured in the transverse momentum range 0:5 < p t < 8 GeV=c. Predictions from a fixed-order perturbative QCD calculation with next-to-leading-log resummation agree with the data within the theoretical and experimental uncertainties.

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“…The distortion of the electric filed affects the drift velocity of the electrons and the ions. This consequently changes the total current density inside the chamber volume [2].…”

Section: Space Charge Effectmentioning

confidence: 99%

“…This leads to a reduction of the electric field inside the chamber which has an influnce on the drift and collection time of the charges. However, The effect is on the signal amplitude within the signal track [2]. The current voltage characteristics of the chamber have been studied using different X-ray intensities by applying different tube currents to increase the photo flux.…”

Section: Saturation Currentmentioning

confidence: 99%

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Space charge effect in the Multi-ionization chamber response signal

Nasr¹

2013

Proceedings of VI European Summer School on Experimental Nuclear Astrophysics — PoS(ENAS 6)

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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 an influence on the signal amplitude. The Multi-channel ionization chamber is a beam monitor which is developed to measure the intensity of the incoming synchrotron radiation exposing the object and the fluctuation in the beam as a function of time. The measurements were carried out at the EDR synchrotron beam line at BESSYII. The chamber was filled with a mixture of 90% Argon and 10% Methane with a pressure of (5.7 and 10) bar. The applied electric field has been tuned from 400v/cm up to 2500 v/cm at which the space charge effect is clearly observed.

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Space charge in drift chambers operated with the Xe,CO2(15%) mixture

Cited by 10 publications

References 22 publications

Monte Carlo simulations of the transition radiation detector of the AMS-02 experiment

Monte Carlo simulations of the transition radiation detector of the AMS-02 experiment

Measurement of electrons from semileptonic heavy-flavor hadron decays inppcollisions ats=7 TeV

Space charge effect in the Multi-ionization chamber response signal

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