Download or read book Testing the Ge Detectors for the MAJORANA DEMONSTRATOR written by and published by . This book was released on 2015 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: High purity germanium (HPGe) crystals will be used for the MAJORANA DEMONSTRATOR, where they serve as both the source and the detector for neutrinoless double beta decay. It is crucial for the experiment to understand the performance of the HPGe crystals. A variety of crystal properties are being investigated, including basic properties such as energy resolution, efficiency, uniformity, capacitance, leakage current and crystal axis orientation, as well as more sophisticated properties, e.g. pulse shapes and dead layer and transition layer distributions. In this talk, we will present our measurements that characterize the HPGe crystals. We will also discuss the our simulation package for the detector characterization setup, and show that additional information can be extracted from data-simulation comparisons.
Download or read book High Voltage Testing for the Majorana Demonstrator written by and published by . This book was released on 2016 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Majorana Collaboration is constructing the Majorana Demonstrator, an ultra-low background, 44-kg modular high-purity Ge (HPGe) detector array to search for neutrinoless double-beta decay in 76Ge. The phenomenon of surface micro-discharge induced by high-voltage has been studied in the context of the Majorana Demonstrator. This effect can damage the front-end electronics or mimic detector signals. To ensure the correct performance, every high-voltage cable and feedthrough must be capable of supplying HPGe detector operating voltages as high as 5 kV without exhibiting discharge. R & D measurements were carried out to understand the testing system and determine the optimum design configuration of the high-voltage path, including different improvements of the cable layout and feedthrough flange model selection. Every cable and feedthrough to be used at the Majorana Demonstrator was characterized and the micro-discharge effects during the Majorana Demonstrator commissioning phase were studied. Furthermore, a stable configuration has been achieved, and the cables and connectors can supply HPGe detector operating voltages without exhibiting discharge.
Download or read book Analysis Techniques for Background Rejection at the Majorana Demonstrator written by and published by . This book was released on 2015 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The MAJORANA Collaboration is constructing the MAJORANA DEMONSTRATOR, an ultra-low background, 40-kg modular HPGe detector array to search for neutrinoless double beta decay in 76Ge. In view of the next generation of tonne-scale Ge-based 0[nu][beta][beta]-decay searches that will probe the neutrino mass scale in the inverted-hierarchy region, a major goal of the MAJORANA DEMONSTRATOR is to demonstrate a path forward to achieving a background rate at or below 1 count/tonne/year in the 4 keV region of interest around the Q-value at 2039 keV. The background rejection techniques to be applied to the data include cuts based on data reduction, pulse shape analysis, event coincidences, and time correlations. The Point Contact design of the DEMONSTRATOR's germanium detectors allows for significant reduction of gamma background.
Download or read book Handbook of Radioactivity Analysis written by Michael F. L'Annunziata and published by Academic Press. This book was released on 2020-03-03 with total page 1110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Radioactivity Analysis: Radiation Physics and Detectors, Volume One, and Radioanalytical Applications, Volume Two, Fourth Edition, is an authoritative reference on the principles, practical techniques and procedures for the accurate measurement of radioactivity - everything from the very low levels encountered in the environment, to higher levels measured in radioisotope research, clinical laboratories, biological sciences, radionuclide standardization, nuclear medicine, nuclear power, and fuel cycle facilities, and in the implementation of nuclear forensic analysis and nuclear safeguards. It includes sample preparation techniques for all types of matrices found in the environment, including soil, water, air, plant matter and animal tissue, and surface swipes.Users will find a detailed discussion of our current understanding of the atomic nucleus, nuclear stability and decay, nuclear radiation, and the interaction of radiation with matter relating to the best methods for radionuclide detection and measurement. - Spans two volumes, Radiation Physics and Detectors and Radioanalytical Applications - Includes a much-expanded treatment of calculations required in the measurement of radionuclide decay, energy of decay, nuclear reactions, radiation attenuation, nuclear recoil, cosmic radiation, and synchrotron radiation - Includes the latest advances in liquid and solid scintillation analysis, alpha- and gamma spectrometry, mass spectrometric analysis, gas ionization and nuclear track analysis, and neutron detection and measurement - Covers high-sample-throughput microplate techniques and multi-detector assay methods
Download or read book Nomographs for Use in the Fabrication and Testing of Ge Li Detectors written by Alvin H. Sher and published by . This book was released on 1970 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Six nomographs which can facilitate the fabrication and testing of lithium-drifted germanium gamma-ray detectors (Ge(Li) detectors) have been constructed which relate the following parameters:time, temperature, applied bias, and drifted depth:lithium mobility, crystal resistivity, and oxygen concentration; area, capacitance, and drifted depth for planar Ge(Li) detectors; drifted depth, length, and capacitance for coaxial Ge(Li) detectors; total spectral resolution; system noise, and detector resolution; gamma-ray energy, and effective Fano factor.The use of these nomographs is described and illustrative examples are given.(Author).
Download or read book Particle Physics at the Tercentenary of Mikhail Lomonosov written by Moskovskiĭ gosudarstvennyĭ universitet im. M.V. Lomonosova and published by World Scientific. This book was released on 2013 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is devoted to a wide variety of investigations, both in theory and experiment, of particle physics such as electroweak theory, fundamental symmetries, tests of the Standard Model and beyond, neutrino and astroparticle physics, heavy quark physics, non-perturbative QCD, quantum gravity effects, and present and future accelerator physics.
Download or read book Low Background Signal Readout Electronics for the MAJORANA DEMONSTRATOR written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The MAJORANA DEMONSTRATOR is a planned 40 kg array of Germanium detectors intended to demonstrate the feasibility of constructing a tonne-scale experiment that will seek neutrinoless double beta decay (0 nu beta beta) in Ge-76. Such an experiment would require backgrounds of less than 1 count/tonne-year in the 4 keV region of interest around the 2039 keV Q-value of the beta beta decay. Designing low-noise electronics, which must be placed in close proximity to the detectors, presents a challenge to reaching this background target. This paper will discuss the MAJORANA collaboration's solutions to some of these challenges.
Download or read book IEEE Test Procedures for High purity Germanium Detectors for Ionizing Radiation written by and published by . This book was released on 1977 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book IEEE Standard Test Procedures for Germanium Gamma ray Detectors written by and published by . This book was released on 1997 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 325 1986 IEEE Standard Test Procedures for Germanium Gamma Ray Detectors written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Searching for Neutrinoless Double beta Decay of Germanium 76 in the Presence of Backgrounds written by Alexis G. Schubert and published by . This book was released on 2012 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: The neutrino, an elementary particle, has been the subject of experimental investigation for over 50 years. Recent experiments have shown that neutrinos have mass and oscillate, but questions about fundamental properties of the neutrino remain. The observation of neutrinoless double-beta decay could determine whether lepton number is violated, discover whether the neutrino is its own antiparticle, and provide information about the absolute scale of neutrino mass. The MAJORANA Collaboration will search for neutrinoless double-beta decay of germanium-76 in an array of germanium detectors. Previous experiments indicate that the half life of this decay mode is greater than 1025 years. To be sensitive to this rate, MAJORANA must construct an ultra-low-background detector. MAJORANA is building the DEMONSTRATOR, a 40-kg detector array, at the Sanford Underground Research Facility in Lead, South Dakota. The neutrinoless double-beta decay of 76-Ge would produce 76-Se and two electrons with 2039 keV of energy. The physics reach of the DEMONSTRATOR will be determined by the background count rate in a 4-keV energy region surrounding the 2039-keV Q-value. MAJORANA has a background goal of less than three counts in the energy region of interest per tonne-year of DEMONSTRATOR exposure. Projections of the DEMONSTRATOR's sensitivity are determined from a background energy-spectrum model based on material assay data and Monte Carlo simulation results. Understanding and minimization of backgrounds is critical to the success of the DEMONSTRATOR. MAJORANA Collaborators operate a low-background detector in a shielded environment at the Kimballton Underground Research Facility near Ripplemeade, Virginia. The contents of the detector cryostat are well known, making it a good candidate for testing the MAJORANA background model. This dissertation describes the creation of a background energy- spectrum model for the Kimballton detector. Energy spectra measured with the detector at Kimballton are compared to results of the background model, and implications for the DEMONSTRATOR are explored.
Download or read book Monographs for Use in the Fabrication and Testing of GE Li Detectors written by Alvin H. Sher and published by . This book was released on 1970 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nomographs for Use in the Fabrication and Testing of Ge Li Detectors Classic Reprint written by Alvin H. Sher and published by Forgotten Books. This book was released on 2018-10-02 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Nomographs for Use in the Fabrication and Testing of Ge (Li) Detectors During the fabrication of ge(li) detectors and in their testing, the need often arises to compare various sets of parameters or to estimate certain quantities from experimental data. By using nomo graphs, the need for repetitive or relatively complicated calculations can often be eliminated. To this end, nomographs relating the most commonly used detector parameters were constructed. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book IEEE Std 325 1971 ANSI N42 8 1972 IEEE Standard Test Procedures for Germanium Gamma Ray Detectors written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Test Procedures for Germanium Gamma ray Detectors written by IEEE Nuclear and Plasma Sciences Society. Nuclear Instruments and Detectors Committee and published by . This book was released on 1985 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Compton Suppression Tests on Ge and BGO Prototype Detectors for Gammasphere written by and published by . This book was released on 1992 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last decade the application of arrays of 10--30 Compton Suppressed germanium (CSG) detectors in the field of [gamma]-ray spectroscopy has led to a number of significant advances in studies of nuclear structure. Despite the success of these instruments, most of them are limited to detecting two-fold (and in a few cases three-fold) coincidences from highmultiplicity cascades. To increase the detection sensitivity for weak cascades, proposals have recently emerged for construction of much larger arrays. In the USA, the proposed array, called GAMMASPHERE, is to have 110 large CSG detectors which will subtend a solid angle of almost 2[pi] steradians, sufficient to permit routine acquisition of up to 5-fold coincidences from high-multiplicity cascades. This together with other improvements, will yield a resolving power several orders of magnitude greater than currents arrays. In Europe, an array of similar size and power, called EUROGAM, is currently being constructed. In this paper, we report on measurements of the Compton suppression and overall P/T ratio of two Ge detectors in a BGO shield of the honeycomb pattern. These were the first prototype CSG detector assemblies for GAMMASPHERE.
Download or read book An American National Standard written by and published by . This book was released on 1986 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
