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# IEEE Transactions on Nuclear Science

## Issue 4  Part 2 • Aug. 2011

This issue contains several parts.Go to:  Part 1

## Filter Results

Displaying Results 1 - 25 of 39

Publication Year: 2011, Page(s):C1 - 1894
| PDF (88 KB)
• ### IEEE Transactions on Nuclear Science publication information

Publication Year: 2011, Page(s): C2
| PDF (40 KB)
• ### Fiber Optics for Metrology in Nuclear Research Reactors—Applications to Dimensional Measurements

Publication Year: 2011, Page(s):1895 - 1902
Cited by:  Papers (3)
| | PDF (858 KB) | HTML

In-situ measurement is a key issue for advanced irradiation programs in nuclear research reactors, especially in Material Testing Reactors (MTR). In that prospect, Optical Fiber Sensors (OFS) can feature unique intrinsic properties that bring substantial advantages over conventional sensing approaches. One of the objectives of the Joint Instrumentation Laboratory (JIL), gathering SCK·CEN (B... View full abstract»

• ### Improve Transuranian Wastes Measurements by Non-Destructive Passive Neutron Assay Using a Matrix Correction Method by Neutron Transmission

Publication Year: 2011, Page(s):1903 - 1906
| | PDF (383 KB) | HTML

We address the problem of coefficient calibration choice in transuraniuan wastes measurement by non-destructive passive neutron assay. The well-known matrix correction method by neutron transmission, provides an appealing solution and is adapted to our waste issue. The numerical calibration of our assay device and the setting of all parameters needed for the transposition in-situ are realised with... View full abstract»

• ### Improved SAFARI-1 Research Reactor Irradiation Position Modeling in OSCAR-3 Code System

Publication Year: 2011, Page(s):1907 - 1912
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The demand on the availability of irradiation positions in the SAFARI-1 reactor is continuously increasing due to the commercial pressure to produce isotopes more efficiently. This calls for calculational techniques and modeling methods to be improved regularly to optimize irradiation services. The irradiation position models are improved using the OSCAR-3 code system, and results are compared to ... View full abstract»

• ### Recent Developments on Micrometric Fission Chambers Dedicated for High Neutron Fluxes

Publication Year: 2011, Page(s):1913 - 1920
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With the development of innovative nuclear systems and new generation neutron sources, the nuclear instrumentation should be adapted. Since several years, we developed microscopic fission chambers to study the transmutation of minor actinides in high thermal-neutron fluxes. The recent developments done to fulfill the drastic conditions of irradiations are described in this paper together with the ... View full abstract»

• ### MATSIM: Development of a Voxel Model of the MATROSHKA Astronaut Dosimetric Phantom

Publication Year: 2011, Page(s):1921 - 1926
Cited by:  Papers (2)
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The AIT Austrian Institute of Technology coordinates the project MATSIM (MATROSHKA Simulation) in collaboration with the Vienna University of Technology and the German Aerospace Center, to perform FLUKA Monte Carlo simulations of the MATROSHKA numerical phantom irradiated under reference radiation field conditions as well as for the radiation environment at the International Space Station (ISS). M... View full abstract»

• ### TID in Flash-Based FPGA: Power Supply-Current Rise and Logic Function Mapping Effects in Propagation-Delay Degradation

Publication Year: 2011, Page(s):1927 - 1934
Cited by:  Papers (9)
| | PDF (1227 KB) | HTML

We exposed a flash-based FPGA to radiation to measure variations in current, temperature, propagation-delay and duty-cycle in logic circuits. Propagation-delay degradations vary from 400% to 1100% before functional failure, according to circuit and logical mapping. Electrical simulations are carried out to study the difference of behavior in the degradation of different logic mappings. View full abstract»

• ### Study of the Effects of Edge Morphology on Detector Performance by Leakage Current and Cathodoluminescence

Publication Year: 2011, Page(s):1935 - 1941
Cited by:  Papers (16)
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The Vertical Gradient Freeze (VGF) method has been used to grow high resistivity Cadmium Zinc Telluride (CZT) for high energy radiation applications. In this work, the effect of lapping and polishing the lateral edges of planar detectors is studied. Expectations that improved surface morphology of the edges should correlate with reduced surface leakage current are shown to be erroneous. The effect... View full abstract»

• ### Inclusions Elimination and Resistivity Restoration of CdTe:Cl Crystals by Two-Step Annealing

Publication Year: 2011, Page(s):1942 - 1948
Cited by:  Papers (13)
| | PDF (1818 KB) | HTML

The aim of this work was to find an effective annealing treatment leading to a complete elimination of Te inclusions and simultaneously to conservation of the resistivity of CdTe:Cl crystals with varying chlorine doping level. This goal was reached by an application of two post-growth annealing steps. The first annealing step performed under Cd overpressure led to a significant reduction of Te inc... View full abstract»

• ### Internal Electric Field Estimation, Charge Transport and Detector Performance of As-Grown ${rm Cd}_{0.9}{rm Zn}_{0.1}{rm Te:In}$ by THM

Publication Year: 2011, Page(s):1949 - 1952
Cited by:  Papers (5)
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In this article we report the evaluation of thick (up to 10 mm) as-grown Cd0.9Zn0.1Te(CZT):In detectors fabricated from ingots grown by traveling heater method (THM). The crystals were investigated by mapping the electron mobility (μe), (μτ)e and the internal electric field of as-grown CZT samples. The detector performance was also e... View full abstract»

• ### Photoconductivity Mapping of Semi-Insulating CdZnTe

Publication Year: 2011, Page(s):1953 - 1957
Cited by:  Papers (4)
| | PDF (793 KB) | HTML

Semi-insulating CdZnTe crystals were studied by photoconductivity mapping using both the contactless method and measurement with evaporated Au contacts. The contact quality was tested by measurement of voltampere characteristics by a three-point method. We evaluated the distribution of space charge analyzing the slope of lux-ampere characteristics. Mobility- lifetime (μτ) product map... View full abstract»

• ### Effect of DC Bias Field on the Time-of-Flight Current Waveforms of CdTe and CdZnTe Detectors

Publication Year: 2011, Page(s):1958 - 1963
Cited by:  Papers (16)
| | PDF (602 KB) | HTML

The effect of a DC bias field on the time-of-flight current waveforms of electron and hole drift in CdTe and CdZnTe is reported. Under a DC bias, the electron waveforms show more rapid decay than under a pulsed bias, whereas the hole waveforms evolve with time. Qualitatively similar behavior is observed in both CdTe and CdZnTe. Monte Carlo simulations of the current waveforms indicate that these r... View full abstract»

• ### Ion Beam (RBS) and XRF Analysis of Metal Contacts Deposited on CdZnTe and CdTe Crystals

Publication Year: 2011, Page(s):1964 - 1971
Cited by:  Papers (5)
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Rutherford Backscattering Spectrometry (RBS) using 6 MeV alpha particles and X-Ray Fluorescence (XRF) with a Pd-anode X-Ray generator were performed to characterize Au and Pt contacts deposited by electroless technique and thermal evaporation on differently treated surfaces of CdZnTe and CdTe crystals. The aim of this study is to understand and improve the structure of the material-electrode inter... View full abstract»

• ### Correlations Between Crystal Defects and Performance of CdZnTe Detectors

Publication Year: 2011, Page(s):1972 - 1980
Cited by:  Papers (21)
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Poor crystallinity remains a major problem affecting the availability and cost of CdZnTe (CZT) detectors. Point defects are responsible for small gradual charge loss and correlated with the electron clouds' drift times, which allows electronic correction of the output signals to achieve high spectral-resolution even with large-volume CZT detectors. In contrast, extended defects causes significant ... View full abstract»

• ### Layered GaTe Crystals for Radiation Detectors

Publication Year: 2011, Page(s):1981 - 1986
Cited by:  Papers (11)
| | PDF (778 KB) | HTML

In this work we investigated a new method of growing detector grade large GaTe layered chalcogenide single crystals. GaTe ingots (2" diameter) were grown by a novel method using graphite crucible by slow crystallization from a melt of high purity (7 N) Ga and zone refined (ZR) Te precursors in an argon atmosphere. GaTe samples from the monocrystalline area of the ingot have been cleaved mechanical... View full abstract»

• ### Recent Development of TlBr Gamma-Ray Detectors

Publication Year: 2011, Page(s):1987 - 1991
Cited by:  Papers (14)
| | PDF (231 KB) | HTML

Planar detectors, strip detectors, and double-sided strip detectors were fabricated from TlBr crystals grown by the traveling molten zone method using zone-purified material. The detector performance including the leakage current, energy resolutions, and timing performance were evaluated in order to assess the capability of the detectors for PET and SPECT applications. The TlBr detectors exhibited... View full abstract»

• ### Characterization of Semi-Insulating 4H Silicon Carbide for Radiation Detectors

Publication Year: 2011, Page(s):1992 - 1999
Cited by:  Papers (17)
| | PDF (1064 KB) | HTML

Radiation detectors have been fabricated on 8 mm × 8 mm substrates, ~390 μm in thickness, diced from a (0001) 4H-SiC semi-insulating (SI) wafer (≥ 1012 Ohm-cm). The crystals used for detector fabrication have been characterized by x-ray diffraction (XRD), electron beam induced current (EBIC), chemical etching, cross-polarized imaging, and Raman spectroscopy. Current... View full abstract»

• ### Parameter Optimizations and Performances for the Low-Charge Beams in PAL Free-Electron Laser

Publication Year: 2011, Page(s):2000 - 2010
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We investigated optimum choices of beam and accelerator parameters for low-charge beams of self-amplified spontaneous emission (SASE) free-electron laser (FEL) at PAL. The FEL system is designed to provide a short pulse beam to generate the high power of the wavelength of 1-Å in the undulator. The designed linac provides the pulses of 10 fs rms and 3.85 fs rms for the charges of 0.2 nC and ... View full abstract»

• ### The 10-ps Multitime Measurements Averaging TDC Implemented in an FPGA

Publication Year: 2011, Page(s):2011 - 2018
Cited by:  Papers (28)
| | PDF (788 KB) | HTML

We present a theoretical analysis of the characteristics of a multitime averaging TDC and an improved implementation scheme that is adapted to our previous version of FPGA TDCs from Xilinx Virtex 4 family without any modifications to the hardware. Using MATLAB we simulate the timing performance of the multitime averaging TDC on a variety of averaging times. The simulation results are verified with... View full abstract»

• ### Development of Waveform Multiplexing Method With Decay Time Modulation for Front-End ASIC of Pixelated Detectors

Publication Year: 2011, Page(s):2019 - 2023
| | PDF (617 KB) | HTML

This paper proposes a novel waveform multiplexing method to realize high channel-density front-end application specific integrated circuit (ASIC) design. In the proposed method, multiplexing is achieved through connecting multiple preamplifiers to a single analog-to-digital converter (ADC). These preamplifiers have different decay time (90%-10%) which will be used as the tag information. The chann... View full abstract»

• ### Optimization of DC-DC Converters for Improved Electromagnetic Compatibility With High Energy Physics Front-End Electronics

Publication Year: 2011, Page(s):2024 - 2031
Cited by:  Papers (10)
| | PDF (1075 KB) | HTML

The upgrade of the Large Hadron Collider (LHC) experiments at CERN sets new challenges for the powering of the detectors. One of the powering schemes under study is based on DC-DC buck converters mounted on the front-end modules. The hard environmental conditions impose strict restrictions to the converters in terms of low volume, radiation and magnetic field tolerance. Furthermore, the noise emis... View full abstract»

• ### Characterization of the Flip Capacitor Filter for the XFEL-DSSC Project

Publication Year: 2011, Page(s):2032 - 2038
Cited by:  Papers (9)
| | PDF (765 KB) | HTML

The European X-ray Free Electron Laser (XFEL) under construction in Hamburg (Germany) will be able to deliver high intensity X-ray pulses of few tens of femto seconds of duration, at 5 MHz pulse repetition rate. Thanks to its characteristics, this instrument will open up new research opportunities for experiments in femto chemistry, structural biology and material research. A high speed focal plan... View full abstract»

• ### Fine-Pitch Semiconductor Detector for the FOXSI Mission

Publication Year: 2011, Page(s):2039 - 2046
Cited by:  Papers (6)
| | PDF (1296 KB) | HTML

The Focusing Optics X-ray Solar Imager (FOXSI) is a NASA sounding rocket mission which will study particle acceleration and coronal heating on the Sun through high sensitivity observations in the hard X-ray energy band (5-15 keV). Combining high-resolution focusing X-ray optics and fine-pitch imaging sensors, FOXSI will achieve superior sensitivity; two orders of magnitude better than that of the ... View full abstract»

• ### An Analysis of Intense Pulsed Active Detection (IPAD) for the Detection of Special Nuclear Materials

Publication Year: 2011, Page(s):2047 - 2054
Cited by:  Papers (17)
| | PDF (1141 KB) | HTML

We propose and analyze computationally the Intense Pulsed Active Detection (IPAD) of fissile materials. This approach employs bremsstrahlung photons from a single intense 100-ns interrogating pulse produced by a pulsed-power generator. The IPAD system requires only 3 s to detect delayed neutrons. In contrast, a multiple-pulse-train LINAC system requires several minutes. Because of the much smaller... View full abstract»

## Aims & Scope

IEEE Transactions on Nuclear Science focuses on all aspects of the theory and applications of nuclear science and engineering, including instrumentation for the detection and measurement of ionizing radiation; particle accelerators and their controls; nuclear medicine and its application; effects of radiation on materials, components, and systems; reactor instrumentation and controls; and measurement of radiation in space.

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