Publications

1999
McConnell ML. SOLPOL: A Solar Polarimeter for Hard X-Rays and Gamma-Rays. NASA STI/Recon Technical Report N. 1999.
1998
Wunderer CB, Holslin D, Macri JR, McConnell M, Ryan JM. SONTRAC-A Low Background, Large Area Solar Neutron Spectrometer, in Conference on the High Energy Radiation Backgroun in Space. ; 1998 :73–73.
Morris DJ, McConnell ML, Ryan JM, Diehl R, Oberlack UG, Schönfelder V, Varendorff M, Weidenspointer G, DEBOER H, Bennett K. Activation in the COMPTEL Double-Scattering Gamma-Ray Telescope, in Conference on the High Energy Radiation Backgroun in Space. ; 1998 :26–26.
Kappadath SC, Ryan J, McConnell M, Bennett K, Winkler C, Bloemen H, Hermsen W, Diehl R, Schonfelder V, Varendorff M, et al. COMPTEL measurements of the Cosmic Diffuse Gamma-Ray Spectrum from 800 keV to 30 MeV, in American Astronomical Society Meeting Abstracts #192. Vol 30. ; 1998 :926–926.
McConnell ML, Macri JR, McClish M, Ryan J, Forrest DJ, Vestrand WT. Development of a hard X-ray polarimeter for astrophysics, in Conference Record of the 1998 IEEE Nuclear Science Symposium. ; 1998. Publisher's VersionAbstract
We have been developing a Compton scatter polarimeter for measuring the linear polarization of hard X-rays (100-300 keV) from astrophysical sources. A laboratory prototype polarimeter has been used to successfully demonstrate the reliability of our Monte Carlo simulation code and to demonstrate our ability to generate a polarized photon source in the lab. Our design concept places a self-containedpolarimeter module on the front-end of a a 5-inch position sensitive PMT (PSPMT). We are currently working on the fabrication of a science model based on this PSPMT concept. Although the emphasis of our development effort is towards measuring hard X-rays from solar flares, our design has the advantage that it is sensitive over a rather large field-of-view (\textgreater1 steradian), a feature that makes it especially attractive for γ-ray burst studies.
McConnell ML, Forrest DJ, Macri J, Ryan JM, Vestrand WT. Development of a hard x-ray polarimeter for gamma-ray bursts, in Gamma-Ray Bursts, 4th Hunstville Symposium. Vol 428. ; 1998 :889–893.
Rank G, Debrunner H, Lockwood J, McConnell M, Ryan J, Schonfelder V. Extended Gamma-Ray Emission from Large Coronal Loops, in CESRA Workshop on Coronal Explosive Events. ; 1998 :61–61.
Ryan J, McConnell ML, Forrest DJ, Macri JR, McClish M, Vestrand WT. A hard X-ray solar flare polarimeter design based on scintillating fibers, in AIP Conference Proceedings. ; 1998. Publisher's VersionAbstract
We have developed a design for a Compton scatter polarimeter to measure the polarization of hard X-rays (50–300 keV) from solar flares. The modular design is based on an annular array of scintillating fibers coupled to a 5-inch position-sensitive PMT. Incident photons scatter from the fiber array into a small array of NaI detectors located at the center of the annulus. The location of the interactions in both the fiber array and in the NaI array can be used to measure the linear polarization of the incident flux. This compact design may be well-suited to a variety of astrophysical applications. An extensive series of Monte Carlo simulations has been performed to characterize this design.
McConnell M, Kappadath S, Morris D, Ryan J, Collmar W, Diehl R, Schonfelder V, Varendorff M, Weidenspointner G, Wessolowski U, et al. Improving the Analysis of Gamma-Ray Data from CGRO-COMPTEL, in American Astronomical Society Meeting Abstracts #192. Vol 30. ; 1998 :827–827.
Connors A, Collmar W, Hermsen W, Kappadath S, Kippen RM, Kuiper L, McConnell M, Pelaez F, Ryan JM, Schönfelder V, et al. MeV measurements of gamma-ray bursts by CGRO-COMPTEL, in Gamma-Ray Bursts, 4th Hunstville Symposium. Vol 428. ; 1998 :344–348.
Ryan JM, Kappadath S, McConnell M, Morris D, Schönfelder V, Varendorff M, Weidenspointer G, Hermsen W, Bennett K. The Prompt Cosmic-Ray-Induced Background in the Orbiting Compton Telescope COMPTEL, in Conference on the High Energy Radiation Backgroun in Space. ; 1998 :13–13.
Stacy JG, Cherry ML, Guzik TG, Ryan JM, McConnell ML, Macri J, Matteson JL, Band DL, Zych AD, Hink PL, et al. A Coded-Aperture X-Ray/gamma-ray Telescope for arc-Minute Localization of Gamma-ray Bursts, in 19th Texas Symposium on Relativistic Astrophysics and Cosmology. ; 1998.
Rielage K, Binns WR, Buckley JH, Hink PL, Israel MH, Pendleton GN, Kippen RM, Mallozzi RS, Paciesas WS, Richardson GA, et al. FiberGLAST Engineering Test Results, in American Astronomical Society Meeting Abstracts. Vol 30. ; 1998 :1343–1343.
Paciesas WS, Pendleton GN, Kippen RM, Mallozzi RS, Richardson GA, Binns WR, Buckley JH, Hink PL, Israel MH, Rielage K, et al. FiberGLAST: The Fiber Detector Concept for NASA’s Gamma-ray Large Area Space Telescope, in American Astronomical Society Meeting Abstracts. Vol 30. ; 1998 :1343–1343.
Mallozzi RS, Pendleton GN, Paciesas WS, Kippen RM, Richardson GA, Karr G, Wallace D, Phengchamnan S, Fishman GJ, Parnell TA, et al. An Overview of the Scintillating Fiber Telescope for Energetic Radiation (SIFTER), in 19th Texas Symposium on Relativistic Astrophysics and Cosmology. ; 1998.
Ryan J, Boykin V, Kippen RM, Larson K, Macri J, Mayer M, McConnell M, Altice P, Cherry ML, Ellison SB, et al. Balloon-borne coded aperture telescope for arc-minute angular resolution at hard x-ray energies. ACTIVE EXPERIMENTS IN SPACE PLASMAS [Internet]. 1998;21 :1009–1013. Publisher's Version
Collmar W, Hermsen W, Kippen RM, Ryan JM, Connors A, Winkler C, Schonfelder V, Kuiper L, McConnell M, Varendorff M. Characteristics of gamma-ray bursts at MeV energies measured by COMPTEL. Advances in Space Research. 1998;22 :1097–1100.
Kippen RM, Ryan JM, Connors A, Winkler C, Schonfelder V, Kuiper L, McConnell M, Varendorff M, Hermsen W, Collmar W. Characteristics of gamma-ray bursts at MeV energies measured by COMPTEL. X-RAY TIMING AND COSMIC GAMMA RAY BURSTS [Internet]. 1998;22 :1097–1100. Publisher's Version
Morris DJ, Aarts H, Bennett K, Lockwood JA, McConnell ML, Ryan JM, Schonfelder V, Steinle H, Weidenspointner G. Comptel measurements of the omnidirectional high-energy neutron flux in near-earth orbit. LIFE SCIENCES: RADIATION ENVIRONMENT AND MODELLING [Internet]. 1998;21 :1789–1792. Publisher's Version
Kocharov L, Debrunner H, Kovaltsov G, Lockwood J, McConnell M, Nieminen P, Rank G, Ryan J, Schonfelder V. Deduced spectrum of interacting protons accelerated after the impulsive phase of the 15 June 1991 solar flare. ASTRONOMY & ASTROPHYSICS [Internet]. 1998;340 :257–264. Publisher's Version

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