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Articles 1 - 6 of 6
Full-Text Articles in Physical Sciences and Mathematics
Mega: The Next Generation Medium Energy Gamma-Ray Telescope, James M. Ryan, R Andritsche, Peter F. Bloser, J Cravens, M L. Cherry, G Dicocco, T G. Guzik, Dieter H. Hartman, Stanley D. Hunter, G Kanbach, R M. Kippen, J Kurfess, John R. Macri, Mark L. Mcconnell, R S. Miller, W Paciesas, B F. Phlips, V Reglero, J G. Stacy, Mark Strickman, W T. Vestrand, J P. Wefel, Eric Wulf, A Zoglauer, Allen Zych
Mega: The Next Generation Medium Energy Gamma-Ray Telescope, James M. Ryan, R Andritsche, Peter F. Bloser, J Cravens, M L. Cherry, G Dicocco, T G. Guzik, Dieter H. Hartman, Stanley D. Hunter, G Kanbach, R M. Kippen, J Kurfess, John R. Macri, Mark L. Mcconnell, R S. Miller, W Paciesas, B F. Phlips, V Reglero, J G. Stacy, Mark Strickman, W T. Vestrand, J P. Wefel, Eric Wulf, A Zoglauer, Allen Zych
Space Science Center
The MEGA mission would enable a sensitive all-sky survey of the medium-energy ?-ray sky (0.3-50 MeV). This mission will bridge the huge sensitivity gap between the COMPTEL and OSSE experiments on the Compton Gamma Ray Observatory, the SPI and IBIS instruments on INTEGRAL and the visionary ACT mission. It will, among other things, serve to compile a much larger catalog of sources in this energy range, perform far deeper searches for supernovae, better measure the galactic continuum emission as well as identify the components of the cosmic diffuse emission. The large field of view will allow MEGA to continuously monitor …
Caster: A Scintillator-Based Black Hole Finder Probe, Mark L. Mcconnell, M L. Cherry, T G. Guzik, R M. Kippen, James M. Ryan, John R. Macri, R S. Miller, W Paciesas, B Schaefer, J G. Stacy, J P. Wefel, W T. Vestrand
Caster: A Scintillator-Based Black Hole Finder Probe, Mark L. Mcconnell, M L. Cherry, T G. Guzik, R M. Kippen, James M. Ryan, John R. Macri, R S. Miller, W Paciesas, B Schaefer, J G. Stacy, J P. Wefel, W T. Vestrand
Space Science Center
The primary scientific mission of the Black Hole Finder Probe (BHFP), part of the NASA Beyond Einstein program, is to survey the local Universe for black holes over a wide range of mass and accretion rate. One approach to such a survey is a hard X-ray coded-aperture imaging mission operating in the 10-600 keV energy band, a spectral range that is considered to be especially useful in the detection of black hole sources. The development of new inorganic scintillator materials provides improved performance (for example, with regards to energy resolution and timing) that is well suited to the BHFP science …
Single-Sided Czt Strip Detectors, John R. Macri, B Donmez, Mark Widholm, L A. Hamel, Manuel Julien, T Narita, James M. Ryan, Mark L. Mcconnell
Single-Sided Czt Strip Detectors, John R. Macri, B Donmez, Mark Widholm, L A. Hamel, Manuel Julien, T Narita, James M. Ryan, Mark L. Mcconnell
Space Science Center
We report progress in the study of thick CZT strip detectors for 3-d imaging and spectroscopy and discuss two approaches to device design. We present the spectroscopic, imaging, detection efficiency and response uniformity performance of prototype devices. Unlike double-sided strip detectors, these devices feature both row and column contacts implemented on the anode surface. This electron-only approach circumvents problems associated with poor hole transport in CZT that normally limit the thickness and energy range of double-sided strip detectors. These devices can achieve similar performance to pixel detectors. The work includes laboratory and simulation studies aimed at developing compact, efficient, detector …
Dedicated Polarimeter Design For Hard X-Ray And Soft Gamma-Ray Astronomy, Mark L. Mcconnell, J Ledoux, John R. Macri, James M. Ryan
Dedicated Polarimeter Design For Hard X-Ray And Soft Gamma-Ray Astronomy, Mark L. Mcconnell, J Ledoux, John R. Macri, James M. Ryan
Space Science Center
We have developed a modular design for a hard X-ray and soft gamma-ray polrimeter that we call GRAPE (Gamma RAy Polarimeter Experiment). Optimized for the energy range of 50-300 keV, the GRAPE design is a Compton polarimeter based on the use of an array of plastic scintillator scattering elements in conjunction with a centrally positioned high-Z calorimeter detector. Here we shall review the results from a laboratory model of the baseline GRAPE design. The baseline design uses a 5-inch diameter position sensitive PMT (PSPMT) for readout of the plastic scintillator array and a small array of CsI detectors for measurement …
Future Prospects For High Energy Polarimetry Of Gamma‐Ray Bursts, Mark L. Mcconnell
Future Prospects For High Energy Polarimetry Of Gamma‐Ray Bursts, Mark L. Mcconnell
Space Science Center
The recent detection of linear polarization from GRB120206 has piqued the interest of the community in this relatively unexplored avenue of research. Here, we review the current status and prospects for GRB polarimetry at hard X‐ray and soft γ‐ray energies. After reviewing the most recent results, we present a brief survey of current and planned experiments that are capable of making GRB polarization measurements in the energy range between 30 keV and 30 MeV.
Single-Sided Czt Strip Detectors, John R. Macri, L A. Hamel, Manuel Julien, R S. Miller, B Donmez, Mark L. Mcconnell, James M. Ryan, Mark Widholm
Single-Sided Czt Strip Detectors, John R. Macri, L A. Hamel, Manuel Julien, R S. Miller, B Donmez, Mark L. Mcconnell, James M. Ryan, Mark Widholm
Space Science Center
We report progress in the study of thick CZT strip detectors for 3-D imaging and spectroscopy and discuss two approaches to device design. Unlike double-sided strip detectors, these devices feature both row and column contacts implemented on the anode surface. This electron-only approach circumvents problems associated with poor hole transport in CZT that normally limit the thickness and energy range of double-sided strip detectors. The work includes laboratory and simulation studies aimed at developing compact, efficient, detector modules for 0.05 to 1 MeV gamma radiation measurements while minimizing the number and complexity of the electronic readout channels. These devices can …