Bump Height at Low Temperature Analysis

Sauli, Zaliman; Retnasamy, Vithyacharan; Fuad, Fairul Afzal Ahmad; Ehkan, Phaklen; Taniselass, Steven

doi:10.4028/www.scientific.net/amm.404.77

Cited by 2 publications

(3 citation statements)

References 12 publications

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“…The measured dE /dx in this figure clearly distinguishes the Compton electrons fully contained in the TPC from the backgrounds, and resultantly enables us to remove most of the backgrounds without loss of Compton events by applying cuts. The red-dashed line in this figure is the empirical formula of dE /dx , which is approximately proportional to E 1.72 (Sauli 1977), for recoil electrons fully contained in the TPC. The region within E 1.72±0.22 contains ∼95% of Compton events inside (dE /dx cut), as supported by the simulation result.…”

Section: Basic Performance Of the Smile-iimentioning

confidence: 99%

AN ELECTRON-TRACKING COMPTON TELESCOPE FOR A SURVEY OF THE DEEP UNIVERSE BY MeV GAMMA-RAYS

Tanimori

Kubo

Takada

et al. 2015

ApJ

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Photon imaging for MeV gammas has serious difficulties due to huge backgrounds and unclearness in images, which are originated from incompleteness in determining the physical parameters of Compton scattering in detection, e.g., lack of the directional information of the recoil electrons. The recent major mission/instrument in the MeV band, Compton Gamma Ray Observatory/COMPTEL, which was Compton Camera (CC), detected mere ∼ 30 persistent sources. It is in stark contrast with ∼2000 sources in the GeV band. Here we report the performance of an Electron-Tracking Compton Camera (ETCC), and prove that it has a good potential to break through this stagnation in MeV gamma-ray astronomy. The ETCC provides all the parameters of Compton-scattering by measuring 3D recoil electron tracks; then the Scatter Plane Deviation (SPD) lost in CCs is recovered. The energy loss rate (dE/dx), which CCs cannot measure, is also obtained, and is found to be indeed helpful to reduce the background under conditions similar to space. Accordingly the significance in gamma detection is improved severalfold. On the other hand, SPD is essential to determine the point-spread function (PSF) quantitatively. The SPD resolution is improved close to the theoretical limit for multiple scattering of recoil electrons. With such a well-determined PSF, we demonstrate for the first time that it is possible to provide reliable sensitivity in Compton imaging without utilizing an optimization algorithm. As such, this study highlights the fundamental weak-points of CCs. In contrast we demonstrate the possibility of ETCC reaching the sensitivity below 1×10 −12 erg cm −2 s −1 at 1 MeV.

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Section: Basic Performance Of the Smile-iimentioning

confidence: 99%

AN ELECTRON-TRACKING COMPTON TELESCOPE FOR A SURVEY OF THE DEEP UNIVERSE BY MeV GAMMA-RAYS

Tanimori

Kubo

Takada

et al. 2015

ApJ

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“…It depends on the transit of elecrrons from their generation point to the collecting electrode. The spread on the duration of transit leads to a finite time resolution of the detector [2,3]. The main two factors that contribute to the spread are the statistics and distribution of the primary electrons and their diffusion in gas medium.…”

Section: Introductionmentioning

confidence: 99%

“…From event to event, the electron is not produced at the same distance from the read-out plane of the detector under consideration. The general expression for the space distribution of the electron-ion pair j, closest to the read-out plane, whenN P is the average number of pairs produced, is obtained as follows [2,3]:…”

Section: Introductionmentioning

confidence: 99%

Numerical Studies on Time Resolution of Micro-Pattern Gaseous Detectors

et al. 2018

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The Micro-Pattern Gaseous Detectors offer excellent spatial and temporal resolution in harsh radiation environments of high-luminosity colliders. In this work, an attempt has been made to establish an algorithm for estimating the time resolution of different MPGDs. It has been estimated numerically on the basis of two aspects, statistics and distribution of primary electrons and their diffusion in gas medium, while ignoring their multiplication. The effect of detector design parameters, field configuration and the composition of gas mixture on the resolution have also been investigated. Finally, a modification in the numerical approach considering the threshold limit of detecting the signal has been done and tested for the RPC detector for its future implementation in case of MPGDs.

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Bump Height at Low Temperature Analysis

Cited by 2 publications

References 12 publications

AN ELECTRON-TRACKING COMPTON TELESCOPE FOR A SURVEY OF THE DEEP UNIVERSE BY MeV GAMMA-RAYS

AN ELECTRON-TRACKING COMPTON TELESCOPE FOR A SURVEY OF THE DEEP UNIVERSE BY MeV GAMMA-RAYS

Numerical Studies on Time Resolution of Micro-Pattern Gaseous Detectors

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