scholarly journals Performance of Large Area Thin-Film CdTe Detector in Diagnostic X-Ray Imaging

2013 ◽  
Vol 02 (03) ◽  
pp. 98-109 ◽  
Author(s):  
Diana Shvydka ◽  
, Xiance Jin ◽  
E. Ishmael Parsai
Keyword(s):  
Thin Film ◽  
Large Area ◽  
X Ray ◽  
Cdte Detector ◽  
X Ray Imaging

WE-G-110-04: Finding the Optimal Thickness of Large Area Thin-Film CdTe Detector under Diagnostic X-Ray Beams

2011 ◽  
Vol 38 (6Part33) ◽  
pp. 3833-3833
Author(s):  
X Jin ◽  
D Shvydka ◽  
E Parsai
Keyword(s):  
Thin Film ◽  
Optimal Thickness ◽  
Large Area ◽  
X Ray ◽  
Cdte Detector

Process Integration of A-Si:H Schottky Diode and thin Film Transistor for Low-Energy X-Ray Imaging Applications

1998 ◽  
Vol 507 ◽  
Author(s):  
B. Park ◽  
R.V.R. Murthy ◽  
A. Sazonov ◽  
A. Nathan ◽  
S.G. Chamberlain
Keyword(s):  
Thin Film ◽  
Schottky Diode ◽  
Fill Factor ◽  
Process Integration ◽  
Thin Film Transistor ◽  
Sampling Period ◽  
Low Energy ◽  
Large Area ◽  
X Ray ◽  
X Ray Imaging

ABSTRACTIn this paper, we discuss the various design and fabrication issues related to the process integration of a molybdenum/amorphous silicon (Mo/a-Si:H) Schottky diode and a thin film transistor (TFT), for realization of an X-ray pixel intended for large area and low energy imaging applications. Here, the Schottky diode serves as the sensor and the TFT as a switching element for charge readout. Different pixel configurations are fabricated and compared taking into consideration design aspects such as leakage current, process sequence in terms of mask count, fill factor, and mechanical integrity of various layers. Preliminary X-ray response measurements, over the range (40 – 115) kVp, yield a pixel sensitivity of (1–10) million electrons for a readout sampling period of 16·7 ms.

scholarly journals Discovery of recombining plasma inside the extended gamma-ray supernova remnant HB9

2019 ◽  
Vol 489 (3) ◽  
pp. 4300-4310 ◽  
Author(s):  
A Sezer ◽  
T Ergin ◽  
R Yamazaki ◽  
H Sano ◽  
Y Fukui
Keyword(s):  
Supernova Remnant ◽  
Gamma Ray ◽  
Radio Continuum ◽  
Continuum Emission ◽  
Large Area ◽  
Imaging Spectrometer ◽  
X Ray ◽  
East Region ◽  
X Ray Imaging ◽  
Collisional Ionization

ABSTRACT We present the results from the Suzaku X-ray Imaging Spectrometer observation of the mixed-morphology supernova remnant (SNR) HB9 (G160.9+2.6). We discovered recombining plasma (RP) in the western Suzaku observation region and the spectra here are well described by a model having collisional ionization equilibrium (CIE) and RP components. On the other hand, the X-ray spectra from the eastern Suzaku observation region are best reproduced by the CIE and non-equilibrium ionization model. We discuss possible scenarios to explain the origin of the RP emission based on the observational properties and concluded that the rarefaction scenario is a possible explanation for the existence of RP. In addition, the gamma-ray emission morphology and spectrum within the energy range of 0.2–300 GeV are investigated using 10 yr of data from the Fermi Large Area Telescope (LAT). The gamma-ray morphology of HB9 is best described by the spatial template of radio continuum emission. The spectrum is well fit to a log-parabola function and its detection significance was found to be 25σ. Moreover, a new gamma-ray point source located just outside the south-east region of the SNR’s shell was detected with a significance of 6σ. We also investigated the archival H i and CO data and detected an expanding shell structure in the velocity range of $-10.5$ and $+1.8$ km s−1 that is coinciding with a region of gamma-ray enhancement at the southern rim of the HB9 shell.

Design and optimization of large area thin-film CdTe detector for radiation therapy imaging applications

2010 ◽  
Vol 37 (8) ◽  
pp. 3980-3994 ◽  
Author(s):  
E. Ishmael Parsai ◽  
Diana Shvydka ◽  
Jun Kang
Keyword(s):  
Thin Film ◽  
Radiation Therapy ◽  
Large Area ◽  
Design And Optimization ◽  
Cdte Detector
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