Author: Dale Marvin HolmPublisher:
ISBN:
Category : Boron
Languages : en
Pages : 194
Book Description
The Design and Construction of a Neutron Detector
Author: Dale Marvin HolmPublisher:
ISBN:
Category : Boron
Languages : en
Pages : 194
Book Description
Design and Construction of a One-dimensional 3He Position Sensitive Neutron Detector
Author: Jeetesh Bhana KeshawPublisher:
ISBN:
Category : Neutrons
Languages : en
Pages : 448
Book Description
Design and Construction of a Large Area Detector System and Neutron Total Cross Section Measurements in the Energy Range 0.4 to 20 MeV
Author: Michael James RappDesign and Construction of a Fast Neutron Spectrometer Using Solid State Detectors
Author: Phillip Darden Weinert (CAPT, USA.)Publisher:
ISBN:
Category : Neutron counters
Languages : en
Pages : 144
Book Description
Design, Construction and Testing of a Cold Neutron Beam Facility for the Cornell TRIGA Reactor
Author: Takashi EmotoUser-centered Re-design of a Neutron Detector
Author: Pamela CastillejosDevelopment of a Neutron Diffraction System and Neutron Imaging System for Beamport Characterization
Author: Troy Casey UnruhPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Semiconductor neutron detector design, fabrication and testing are all performed at Kansas State University (KSU). The most prevalent neutron detectors built by the KSU Semiconductor Materials And Radiological Technologies Laboratory (SMART Lab) are comprised of silicon diodes with [superscript]6LiF as a neutron converter material. Neutron response testing and calibration of the detectors is performed in a neutron detector test facility. The facility utilizes diffraction with a pyrolytic graphite (PG) monochromator to produce a diffracted neutron beam at the northwest beamport of the KSU Training Research Isotope production General Atomics (TRIGA) Mark-II nuclear reactor. A 2-D neutron beam monitor can also be used in conjunction with the test facility for active calibrations. Described in the following work are the design, construction and operation of a neutron detector test facility and a 2-D neutron detection array. The diffracted neutron beam at the detector test facility has been characterized to yield a neutron beam with an average Gaussian energy of 0.0253 eV. The diffracted beam yields a flux of 1.2x10[superscript]4 neutrons/cm[superscript]2/s at 100 kW of reactor power. The PG monochromator is diffracting on the (002) plane that has been positioned at a Bragg angle of 15.5 degrees. The 2-D neutron detection array has been characterized for uniform pixel response and uniform neutron detection efficiency. The 2-D 5x5 array of neutron detectors with a neutron detection efficiency of approximately 0.5 percent has been used as a beam monitor when performing detector testing. The amplifier circuits for the 5x5 array were designed at the KSU Electronics Design Lab (EDL) and were coupled to a LabVIEW field-programmable gate array that is read out by a custom LabVIEW virtual instrument. The virtual instrument has been calibrated to produce a pixel response that varies by less than two percent from pixel to pixel. The array has been used for imaging and active monitoring of the diffracted neutron beam at the detector test facility. The following work is part of on-going research to develop various types of solid state semiconductor neutron detectors.
The Development of a Novel Diamond-based Neutron Detector and Quantum Color Center Fabrication Framework
Author: Henry Matthew ThurstonPublisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 0
Book Description
This work investigates the use of single crystal diamond in sensing technologies. First, homoepitaxial chemical vapor deposition (CVD) grown semiconducting diamond is used to build an ultra-fast neutron detector. Diamond based neutron detectors are extant technology, but typically limited to neutron energies of less than 14 MeV. This work introduces the Positionally Opposed Schottky Semi-Metal (POSSM) solid state neutron detector. The POSSM device employs two boron-doped P-type semiconducting diamonds in conjunction with a lanthanide foil to create a pair of Schottky junction diodes with a shared cathode. Under reverse bias the diamond-Schottky diodes have undetectable reverse bias leakage current, resulting in a detector with excellent signal-to-noise properties. Preamplifier circuitry has been designed to exploit the favorable properties of the Schottky architecture. Field testing of the device at the Los Alamos Neutron Science Center (LANSCE) yielded successful ultra-fast neutron detection with excellent charge conversion efficiency. Several drawbacks were identified in the performance of the POSSM detector, mainly involving durability of the diodes and speed of the preamplifier. An improved design was developed and is presented in this work, though the improved design has not been built.Secondly, this work presents a novel framework for the simulation of quantum color center formation in diamond. Diamond color centers have been shown to have unique quantum spin properties making them of interest to quantum computing and field sensing. A mesoscale reaction-diffusion framework is developed and a computational solver is built. The Color Center ANnealing And Reaction-Diffusion (CCANARD) program solves the nonlinear reaction-diffusion system by linearization using the Gateaux Derivative and the Crank-Nicolson method. CCANARD is benchmarked for computational efficiency and accuracy. The results are presented and analyzed. An experiment is proposed to further test and develop CCANARD.
Design and Characterization of a Neutron Detector for the Confinement Vessel Disposition Project
Author: Design, Construction, and Use of the Neutron Wall Array in Measuring the 8Li(n,y)9Li Astrophysics Reaction
Author: Philip David ZecherPublisher:
ISBN:
Category : Cross sections (Nuclear physics)
Languages : en
Pages : 250
Book Description