Density Dependence of the Longitudinal Diffusion Coefficient of Electrons in Xenon

Kusano, Hiroki; Matias-Lopes, José A.; Miyajima, M.; Shibamura, Eido; Hasebe, Nobuyuki

doi:10.1143/jjap.51.048001

Cited by 5 publications

(15 citation statements)

References 11 publications

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“…The electron mobility and longitudinal diffusion coefficient were determined by analyzing the waveforms of preamplifier signals. Figure 1 shows the results of the density-normalized longitudinal diffusion coefficient ND L [10,11] result, a significant pressure dependence of ND L was observed for E/N ≈ 0.04 Td. In contrast, no pressure dependence was observed for E/N 0.06 Td.…”

Section: Pressure Dependence Of the Longitudinal Diffusionmentioning

confidence: 98%

“…The longitudinal diffusion coefficient of electrons at room temperature was measured in a wide range of gaseous pressures using two parallel-plate drift chambers with different pressure ranges [10,11]. At relatively low pressures ranging from 0.17 to 1.8 MPa (from 4.19 × 10 19 to 4.82 × 10 20 cm −3 in density), a xenon flash lamp was used as a UV source, and electron swarms were generated by UV flashlights at a photocathode positioned in the chamber [10]. On the other hand, at high pressures ranging from 1.0 to 5.0 MPa (from 2.55 × 10 20 to 1.73 × 10 21 cm −3 in density), electron swarms were generated by 5.49-MeV α-particles [11].…”

Section: Pressure Dependence Of the Longitudinal Diffusionmentioning

confidence: 99%

“…Figure 1 shows the results of the density-normalized longitudinal diffusion coefficient ND L [10,11] as a function of reduced electric field E/N for several representative pressures. Previous experimental results at near or below atmospheric pressure [5] result, a significant pressure dependence of ND L was observed for E/N ≈ 0.04 Td.…”

Section: Pressure Dependence Of the Longitudinal Diffusionmentioning

confidence: 99%

“…In high-pressure xenon, therefore, many of electron transport properties remain to be unveiled. [10,11] are 0.17 (•), 1.0 ( ), 3.0 (•), and 5.0 ( ) MPa. The corresponding gaseous densities are 4.19 × 10 19 , 2.55 × 10 20 , 8.69 × 10 20 , and 1.73 × 10 21 cm −3 , respectively.…”

Section: Introductionmentioning

confidence: 99%

“…In high-pressure xenon, therefore, many of electron transport properties remain to be unveiled. Recently, we measured the longitudinal diffusion coefficient in a wide range of gaseous pressures [10,11] for the purpose of better understanding of the electron transport properties in highpressure xenon. In this paper, our recent experimental results of the longitudinal diffusion coefficient are summarized in section 2, and a comparison between longitudinal and transverse diffusion in high-pressure xenon is made in section 3.…”

Section: Introductionmentioning

confidence: 99%

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Longitudinal and transverse diffusion of electrons in high-pressure xenon

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Section: Pressure Dependence Of the Longitudinal Diffusionmentioning

confidence: 98%

Section: Pressure Dependence Of the Longitudinal Diffusionmentioning

confidence: 99%

Section: Pressure Dependence Of the Longitudinal Diffusionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Longitudinal and transverse diffusion of electrons in high-pressure xenon

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Angular dependence of columnar recombination in high pressure xenon gas using time profiles of scintillation emission

et al. 2018

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A: The angular dependence of the columnar recombination in xenon gas, if observed for low energy nuclear tracks, can be used for a direction-sensitive dark matter search. We measured both scintillation and ionization to study columnar recombination for 5.4 MeV alpha particles in a high pressure gas detector filled with 8 atm xenon. Since the recombination photons are emitted several µs after de-excitation emission, scintillation photons are separated to the fast and slow components. The fast component does not show dependence on the track angle relative to the drift electric field, on the other hand, the slow component increases when the track is aligned with the electric field. The result indicates that the track angle relative to the electric field can be reconstructed from the scintillation time profile.

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Characterization of a medium size Xe/TMA TPC instrumented with microbulk Micromegas, using low-energy γ-rays

et al. 2014

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NEXT-MM is a general-purpose high pressure (10 bar, ∼ 25 l active volume) Xenonbased TPC, read out in charge mode with an 0.8 cm×0.8 cm-segmented 700 cm 2 plane (1152 ch) of the latest microbulk-Micromegas technology. It has been recently commissioned at University of Zaragoza as part of the R&D of the NEXT 0νβ β experiment, although the experiment's first stage is currently being built based on a SiPM/PMT-readout concept relying on electroluminescence. Around 2 million events were collected during the last months, stemming from the low energy γ-rays emitted by a 241 Am source when interacting with the Xenon gas (E γ = 26, 30, 59.5 keV).The localized nature of such events above atmospheric pressure, the long drift times, as well as the possibility to determine their production time from the associated α particle in coincidence, allow the extraction of primordial properties of the TPC filling gas, namely the drift velocity, diffusion and attachment coefficients. In this work we focus on the little explored combination of Xe and trimethylamine (TMA) for which, in particular, such properties are largely unknown. This gas mixture offers potential advantages over pure Xenon when aimed at Rare Event Searches, mainly due to its Penning characteristics, wave-length shifting properties and reduced diffusion, and it is being actively investigated by our collaboration. The chamber is currently operated at 2.7 bar, as an intermediate step towards the envisaged 10 bar. We report here its performance as well as a first implementation of the calibration procedures that have allowed the extension of the previously reported energy resolution to the whole readout plane (10.6% FWHM@30 keV).

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Density Dependence of the Longitudinal Diffusion Coefficient of Electrons in Xenon

Cited by 5 publications

References 11 publications

Longitudinal and transverse diffusion of electrons in high-pressure xenon

Longitudinal and transverse diffusion of electrons in high-pressure xenon

Angular dependence of columnar recombination in high pressure xenon gas using time profiles of scintillation emission

Characterization of a medium size Xe/TMA TPC instrumented with microbulk Micromegas, using low-energy γ-rays

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