In response to the Italian Space Agency announcement ``New Ideas for Space Missions,'' ... more In response to the Italian Space Agency announcement ``New Ideas for Space Missions,'' we have proposed an observatory ``CALorimetri per Osservazioni Solari'' (CALOS) that will perform spatially resolved (Deltatheta~2') X-ray spectroscopy of the solar corona over the 0.1-10 keV band using an array of NTD germanium microcalorimeters. The observatory will also include an X-ray polarimeter of radically new design that will study the hard X-ray solar emission and its polarization and will serve as a flare alarm. .
Physical review. E, Statistical, nonlinear, and soft matter physics, 2001
Spectra of highly charged Kr ions, produced in an electron-beam ion trap (EBIT), have been record... more Spectra of highly charged Kr ions, produced in an electron-beam ion trap (EBIT), have been recorded in a broad x-ray energy band (0.3 keV to 4 keV) with a microcalorimeter detector. Most of the spectral lines have been identified as transitions of B- to Al-like Kr. The transition energies have been determined with 0.2% uncertainty. A semi-empirical EBIT plasma model has been created to calculate a synthetic spectrum of highly charged Kr and to determine a charge state distribution of Kr ions inside the EBIT.
... 509522 ( C 2004) The Role of Depressed Mood and Anger in the Relationship Between Family Con... more ... 509522 ( C 2004) The Role of Depressed Mood and Anger in the Relationship Between Family Conflict and Delinquent Behavior Inga-Dora Sigfusdottir, 1 George Farkas, 2 and Eric Silver 3 Received January 17, 2003; revision March 3, 2004; accepted March 24, 2004 ...
This research uses specific diagnoses and symptoms of mental disorder (MDO) to predict whether in... more This research uses specific diagnoses and symptoms of mental disorder (MDO) to predict whether inmates offend in prison. Social psychological theories of aggression are used to make predictions about what types of MDO affect whether inmates commit violent and nonviolent infractions. The analysis was based on a survey of a nationally representative sample of more than 16,000 inmates from state
We have identified an inexpensive, readily available, mechanically stable, extremely smooth, elas... more We have identified an inexpensive, readily available, mechanically stable, extremely smooth, elastic, and mechanically uniform plastic suitable for thin film X-ray optics. Polyethylene terephthalate (PET) is easily deformed without losing its elastic properties or surface smoothness. Most important, PET can be coated with mono- or multilayers that reflect X-rays at grazing incidence. We have used these properties to produce X-ray
A single stage Adiabatic Demagnetization Refrigerator (ADR), has been set-up at the X-ray Astrono... more A single stage Adiabatic Demagnetization Refrigerator (ADR), has been set-up at the X-ray Astronomy Calibration and Testing (XACT) facility of INAF - Osservatorio Astronomico di Palermo G.S. Vaiana, for the development and testing of cryogenic X-ray detectors for laboratory and astrophysical applications. The ADR allows to cool detectors at temperatures below 40 mK and to maintain them at constant operating
ABSTRACT New design concepts and materials can be used to produce lightweight, thin foil approxim... more ABSTRACT New design concepts and materials can be used to produce lightweight, thin foil approximations, to Wolter I and other X-ray optics. Structures are designed around a central hub and spacers that connect two (or three) spoked wheels. Figure defining, thin pins span the distance between the wheels. Thin, metal coated or multilayered, plastic foils can be formed into full cones, cylinders or spirals for X-ray telescopes or lenses. High resolution X-ray scattering data were obtained for single foils at Cu K (8 KeV). Multi-energy (0.28 - 8 KeV) data were obtained with a multichannel plate imager in a 17 m beam line with a point-to-point focusing, cylindrical X-ray lens with 14 shells. The largest shell has a diameter of 175 mm and a length of 100 mm. Typical images have a FWHM of 20 arcsec. The results indicate that a 60 cm diameter, 4.65 m focal length X-ray telescope can have an HPD of considerably less than 2 arcmin. This research is supported, in part by NASA Grant NAG5-5268, ONR Grant N00014-95-1-1248, and by institutional funding from the Smithsonian Astrophysical Observatory. The SAO multilayer facility receives support from NASA Grant NAG5-5095. This work made use of the MRSEC Shared Experimental Facilities at MIT supported by NSF Grant DMR94-00334.
X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy, 2003
B-MINE is a concept for a balloon mission designed to probe the deepest regions of a supernova ex... more B-MINE is a concept for a balloon mission designed to probe the deepest regions of a supernova explosion by detecting 44Ti emission at 68 keV with spatial and spectral resolutions that are sufficient to determine the extent and velocity distribution of the 44Ti emitting region. The payload introduces the concept of focusing optics and microcalorimeter spectroscopy to nuclear line emission
Abstract. The X-Ray Spectroscopic Explorer (XRASE) has a unique combination of features that will... more Abstract. The X-Ray Spectroscopic Explorer (XRASE) has a unique combination of features that will make it possible to address many of NASA's scientific goals. These include how galaxy clusters form, the physics and chemistry of the ISM, the heating of stellar coronae, the amount and ...
The Reconnection And Microscale (RAM) Solar-Terrestrial Probe. [Proceedings of SPIE 4853, 436 (20... more The Reconnection And Microscale (RAM) Solar-Terrestrial Probe. [Proceedings of SPIE 4853, 436 (2003)]. Jay A. Bookbinder, Edward DeLuca, Peter Cheimets, Leon Golub, Donald M. Hassler, Clarence M. Korendyke, Paul E. Glenn, Eric H. Silver. Abstract. ...
ABSTRACT The Stellar X-ray Polarimeter (SXRP) will be the third orbiting stellar x-ray polarimete... more ABSTRACT The Stellar X-ray Polarimeter (SXRP) will be the third orbiting stellar x-ray polarimeter, and should provide an order of magnitude increase in polarization sensitivity over its predecessors. The SXRP exploits the polarization dependence of reflection from a graphite Bragg crystal and scattering from a lithium Thomson scattering target to measure the linear polarization of x- rays from astrophysical sources. In this paper, we review the status of the SXRP instrument.
OBJECTIVE To provide family physicians with practical ways of managing depressed patients respond... more OBJECTIVE To provide family physicians with practical ways of managing depressed patients responding insufficiently to initial antidepressant treatment. QUALITY OF EVIDENCE A search of MEDLINE and relevant bibliographies showed most studies could be categorized as level III evidence. Few well controlled studies (eg, level I evidence) specify treatment of next choice in rigorously defined treatment-refractory depression (TRD). MAIN MESSAGE Failure
Composite microcalorimeters using neutron transmutation-doped germanium (NTD) thermistors have be... more Composite microcalorimeters using neutron transmutation-doped germanium (NTD) thermistors have been tested at hard x-ray energies. We present a broad band spectrum showing the energy resolution at 60 keV to be approximately 50 eV. The application of these microcalorimeters to the field of nuclear line astrophysics is discussed.
We introduce focusing optics and microcalorimeter spectroscopy to nuclear line emission astrophys... more We introduce focusing optics and microcalorimeter spectroscopy to nuclear line emission astrophysics with a balloon payload concept called, B-MINE. It is designed to probe the deepest regions of a supernova explosion by detecting 44Ti emission at 68 keV with spatial and spectral resolutions that are sufficient to determine the velocity distribution of the 44Ti emitting region. B-MINE has a thin
In response to the Italian Space Agency announcement ``New Ideas for Space Missions,'' ... more In response to the Italian Space Agency announcement ``New Ideas for Space Missions,'' we have proposed an observatory ``CALorimetri per Osservazioni Solari'' (CALOS) that will perform spatially resolved (Deltatheta~2') X-ray spectroscopy of the solar corona over the 0.1-10 keV band using an array of NTD germanium microcalorimeters. The observatory will also include an X-ray polarimeter of radically new design that will study the hard X-ray solar emission and its polarization and will serve as a flare alarm. .
Physical review. E, Statistical, nonlinear, and soft matter physics, 2001
Spectra of highly charged Kr ions, produced in an electron-beam ion trap (EBIT), have been record... more Spectra of highly charged Kr ions, produced in an electron-beam ion trap (EBIT), have been recorded in a broad x-ray energy band (0.3 keV to 4 keV) with a microcalorimeter detector. Most of the spectral lines have been identified as transitions of B- to Al-like Kr. The transition energies have been determined with 0.2% uncertainty. A semi-empirical EBIT plasma model has been created to calculate a synthetic spectrum of highly charged Kr and to determine a charge state distribution of Kr ions inside the EBIT.
... 509522 ( C 2004) The Role of Depressed Mood and Anger in the Relationship Between Family Con... more ... 509522 ( C 2004) The Role of Depressed Mood and Anger in the Relationship Between Family Conflict and Delinquent Behavior Inga-Dora Sigfusdottir, 1 George Farkas, 2 and Eric Silver 3 Received January 17, 2003; revision March 3, 2004; accepted March 24, 2004 ...
This research uses specific diagnoses and symptoms of mental disorder (MDO) to predict whether in... more This research uses specific diagnoses and symptoms of mental disorder (MDO) to predict whether inmates offend in prison. Social psychological theories of aggression are used to make predictions about what types of MDO affect whether inmates commit violent and nonviolent infractions. The analysis was based on a survey of a nationally representative sample of more than 16,000 inmates from state
We have identified an inexpensive, readily available, mechanically stable, extremely smooth, elas... more We have identified an inexpensive, readily available, mechanically stable, extremely smooth, elastic, and mechanically uniform plastic suitable for thin film X-ray optics. Polyethylene terephthalate (PET) is easily deformed without losing its elastic properties or surface smoothness. Most important, PET can be coated with mono- or multilayers that reflect X-rays at grazing incidence. We have used these properties to produce X-ray
A single stage Adiabatic Demagnetization Refrigerator (ADR), has been set-up at the X-ray Astrono... more A single stage Adiabatic Demagnetization Refrigerator (ADR), has been set-up at the X-ray Astronomy Calibration and Testing (XACT) facility of INAF - Osservatorio Astronomico di Palermo G.S. Vaiana, for the development and testing of cryogenic X-ray detectors for laboratory and astrophysical applications. The ADR allows to cool detectors at temperatures below 40 mK and to maintain them at constant operating
ABSTRACT New design concepts and materials can be used to produce lightweight, thin foil approxim... more ABSTRACT New design concepts and materials can be used to produce lightweight, thin foil approximations, to Wolter I and other X-ray optics. Structures are designed around a central hub and spacers that connect two (or three) spoked wheels. Figure defining, thin pins span the distance between the wheels. Thin, metal coated or multilayered, plastic foils can be formed into full cones, cylinders or spirals for X-ray telescopes or lenses. High resolution X-ray scattering data were obtained for single foils at Cu K (8 KeV). Multi-energy (0.28 - 8 KeV) data were obtained with a multichannel plate imager in a 17 m beam line with a point-to-point focusing, cylindrical X-ray lens with 14 shells. The largest shell has a diameter of 175 mm and a length of 100 mm. Typical images have a FWHM of 20 arcsec. The results indicate that a 60 cm diameter, 4.65 m focal length X-ray telescope can have an HPD of considerably less than 2 arcmin. This research is supported, in part by NASA Grant NAG5-5268, ONR Grant N00014-95-1-1248, and by institutional funding from the Smithsonian Astrophysical Observatory. The SAO multilayer facility receives support from NASA Grant NAG5-5095. This work made use of the MRSEC Shared Experimental Facilities at MIT supported by NSF Grant DMR94-00334.
X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy, 2003
B-MINE is a concept for a balloon mission designed to probe the deepest regions of a supernova ex... more B-MINE is a concept for a balloon mission designed to probe the deepest regions of a supernova explosion by detecting 44Ti emission at 68 keV with spatial and spectral resolutions that are sufficient to determine the extent and velocity distribution of the 44Ti emitting region. The payload introduces the concept of focusing optics and microcalorimeter spectroscopy to nuclear line emission
Abstract. The X-Ray Spectroscopic Explorer (XRASE) has a unique combination of features that will... more Abstract. The X-Ray Spectroscopic Explorer (XRASE) has a unique combination of features that will make it possible to address many of NASA's scientific goals. These include how galaxy clusters form, the physics and chemistry of the ISM, the heating of stellar coronae, the amount and ...
The Reconnection And Microscale (RAM) Solar-Terrestrial Probe. [Proceedings of SPIE 4853, 436 (20... more The Reconnection And Microscale (RAM) Solar-Terrestrial Probe. [Proceedings of SPIE 4853, 436 (2003)]. Jay A. Bookbinder, Edward DeLuca, Peter Cheimets, Leon Golub, Donald M. Hassler, Clarence M. Korendyke, Paul E. Glenn, Eric H. Silver. Abstract. ...
ABSTRACT The Stellar X-ray Polarimeter (SXRP) will be the third orbiting stellar x-ray polarimete... more ABSTRACT The Stellar X-ray Polarimeter (SXRP) will be the third orbiting stellar x-ray polarimeter, and should provide an order of magnitude increase in polarization sensitivity over its predecessors. The SXRP exploits the polarization dependence of reflection from a graphite Bragg crystal and scattering from a lithium Thomson scattering target to measure the linear polarization of x- rays from astrophysical sources. In this paper, we review the status of the SXRP instrument.
OBJECTIVE To provide family physicians with practical ways of managing depressed patients respond... more OBJECTIVE To provide family physicians with practical ways of managing depressed patients responding insufficiently to initial antidepressant treatment. QUALITY OF EVIDENCE A search of MEDLINE and relevant bibliographies showed most studies could be categorized as level III evidence. Few well controlled studies (eg, level I evidence) specify treatment of next choice in rigorously defined treatment-refractory depression (TRD). MAIN MESSAGE Failure
Composite microcalorimeters using neutron transmutation-doped germanium (NTD) thermistors have be... more Composite microcalorimeters using neutron transmutation-doped germanium (NTD) thermistors have been tested at hard x-ray energies. We present a broad band spectrum showing the energy resolution at 60 keV to be approximately 50 eV. The application of these microcalorimeters to the field of nuclear line astrophysics is discussed.
We introduce focusing optics and microcalorimeter spectroscopy to nuclear line emission astrophys... more We introduce focusing optics and microcalorimeter spectroscopy to nuclear line emission astrophysics with a balloon payload concept called, B-MINE. It is designed to probe the deepest regions of a supernova explosion by detecting 44Ti emission at 68 keV with spatial and spectral resolutions that are sufficient to determine the velocity distribution of the 44Ti emitting region. B-MINE has a thin
Uploads
Papers by Eric Silver