What Makes Esi Maps More Efficacious?

Sawano, Nobuhiro

doi:10.7901/2169-3358-2001-1-405

Cited by 2 publications

(3 citation statements)

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“…Fig. 1a shows a schematic view of the ETCC [18]. By detecting the direction of the recoil electron track, the direction of each incident gamma ray is determined by a point instead of by an event circle.…”

Section: Introductionmentioning

confidence: 99%

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New readout and data-acquisition system in an electron-tracking Compton camera for MeV gamma-ray astronomy (SMILE-II)

Mizumoto

Matsuoka

Mizumura

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

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For MeV gamma-ray astronomy, we have developed an electron-tracking Compton camera (ETCC) as a MeV gammaray telescope capable of rejecting the radiation background and attaining the high sensitivity of near 1 mCrab in space. Our ETCC comprises a gaseous time-projection chamber (TPC) with a micro pattern gas detector for tracking recoil electrons and a position-sensitive scintillation camera for detecting scattered gamma rays. After the success of a first balloon experiment in 2006 with a small ETCC (using a 10×10×15 cm 3 TPC) for measuring diffuse cosmic and atmospheric sub-MeV gamma rays (Sub-MeV gamma-ray Imaging Loaded-on-balloon Experiment I; SMILE-I), a (30 cm) 3 medium-sized ETCC was developed to measure MeV gamma-ray spectra from celestial sources, such as the Crab Nebula, with single-day balloon flights (SMILE-II). To achieve this goal, a 100-times-larger detection area compared with that of SMILE-I is required without changing the weight or power consumption of the detector system. In addition, the event rate is also expected to dramatically increase during observation. Here, we describe both the concept and the performance of the new data-acquisition system with this (30 cm) 3 ETCC to manage 100 times more data while satisfying the severe restrictions regarding the weight and power consumption imposed by a balloon-borne observation. In particular, to improve the detection efficiency of the fine tracks in the TPC from ∼10% to ∼100%, we introduce a new data-handling algorithm in the TPC. Therefore, for efficient management of such large amounts of data, we developed a data-acquisition system with parallel data flow.

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Section: Introductionmentioning

confidence: 99%

“…(a) Schematic view of the SMILE-II ETCC system[18], and (b) the base part of the TPC comprising the µ-PIC and GEM.…”

mentioning

confidence: 99%

New readout and data-acquisition system in an electron-tracking Compton camera for MeV gamma-ray astronomy (SMILE-II)

Mizumoto

Matsuoka

Mizumura

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

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“…Development of Environmental Sensitivity Index (ESI) maps for the coastal zone of Japan has contributed notably to the oil spill related preparedness of this country [10][11][12]. ESI maps serve as quick references for oil spill responders, comprising three general types of information: 1) shoreline classification, 2) biological resources, and 3) human-use resources [13].…”

Section: Introductionmentioning

confidence: 99%