Spatial resolutions of GEM TPC. A novel theoretical formula and its comparison to latest beam test data

Yonamine, R.; Fujii, Keisuke; Ikematsu, K.; Ishikawa, A.; Fusayasu, T.; Kato, Y.; Kawada, S.; Kobayashi, M.; Matsuda, Takeshi; Nitoh, O.; Settles, R.; Sugiyama, A.; Takahashi, Tohru; Tian, Jinshou; Watanabe, Takashi

doi:10.1088/1748-0221/9/03/c03002

Cited by 12 publications

(21 citation statements)

References 10 publications

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“…The simulation was carried out using Garfield ++ (release v1r0) [32,33] interlaced with Gmsh [34] and Elmer [35]. The microscopic tracking (AvalancheMicroscopic) was used for electrons while the Monte Carlo integration tracking (AvalancheMC ) was employed for ions 14 .…”

Section: Measurement With Lasermentioning

confidence: 99%

Measurement of the electron transmission rate of the gating foil for the TPC of the ILC experiment

Kobayashi

Ogawa

Shoji

et al. 2019

Nuclear Instruments and Methods in Physics Research Section A:

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We have developed a gating foil for the time projection chamber envisaged as a central tracker for the international linear collider experiment. It has a structure similar to the Gas Electron Multiplier (GEM) with a higher optical aperture ratio and functions as an ion gate without gas amplification. The transmission rate for electrons was measured in a counting mode for a wide range of the voltages applied across the foil using an 55 Fe source and a laser in the absence of a magnetic field. The blocking power of the foil against positive ions was estimated from the electron transmissions.1 The coordinate offset (bias) at short drift distances intrinsic to the barycenter method for the hit point reconstruction in a pad row is assumed to have been properly removed.2 The positive ions are assumed to be iso-C 4 H 10 + . The figures in Ref. [19] suggest that the dominant (final) positive ions are most likely hydrocarbons, at least in the case of binary mixtures of CF 4 and a hydrocarbon.3 The displacement is largest at the maximum drift distance as expected, and at the minimum detector radius because the center of gravity of the beam-induced background, and therefore that of charge density within the ion disk is closer to the inner field cage.

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Section: Measurement With Lasermentioning

confidence: 99%

Measurement of the electron transmission rate of the gating foil for the TPC of the ILC experiment

Kobayashi

Ogawa

Shoji

et al. 2019

Nuclear Instruments and Methods in Physics Research Section A:

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“…For illustration, a recent calculation of the position resolution for MPGD-based TPCs is shown in Fig. 35, [231]. Naturally, in the above competition between PSF and segmentation, the transverse spread due to diffusion represents an additional (and irreducible) contribution.…”

Section: Precision In Position Reconstruction ('Position Resolution'mentioning

confidence: 99%

Gaseous and dual-phase time projection chambers for imaging rare processes

González-Díaz

Monrabal

Murphy

2018

Nuclear Instruments and Methods in Physics Research Section A:

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“…The fit function for the xy-resolution σ xy in dependence of the z position in the asymptotic region (diffusion larger than readout segmentation) can be shown [159] to be given by…”

Section: Preliminary Analysis Resultsmentioning

confidence: 99%