Measurements Of The Cosmic Ray Positron Fraction With The Heat Spectrometer (2007)
Musser Barwick Beatty, J. A. Musser, J. J. Beatty, A. Bhattacharyya, C. R. Bower, C. J. Chaput, ...
In this paper we present the results of two measurements of the cosmic-ray positron fraction as a function of energy, obtained using the High Energy Antimatter Telescope (HEAT) balloon-borne...
A New Measurement of the Positron Fraction at High Energies (2007)
Tarl'e Barwick, S. W. Barwick, J. J. Beatty, C. R. Bower, C. Chaput, S. Coutu, ...
We present measurements of the cosmic ray positron fraction from 4.5 -- 50 GeV obtained from the first balloon flight of the High Energy Antimatter Telescope (HEAT). A superconducting magnet...
The Cosmic Positron Fraction: Implications of a New Measurement (2007)
D. Muller, S.W. Barwick, J.J. Beatty, C.R. Bower, C. Chaput, S. Coutu, ...
The first balloon flight of the HEAT instrument in 1994 yielded results on the cosmic ray positron fraction with good statistical and systematic accuracy over the range 4.5-50 GeV. These results do...
Cosmic-Ray Positrons: Are There Primary Sources? (2007)
S. Coutu, S.W. Barwick; J.J. Beatty, A. Bhattacharyya, C.R. Bower, C.J. Chaput, ...
The HEAT instrument has detected cosmic-ray electrons and positrons in two balloon flights, at energies between 1 and ΒΈ50 GeV. The combined data set indicates that the positron fraction does not...
An Integral Field Spectrograph for SNAP Supernova Identification (2006)
Ealet, A., Prieto, E., Bonissent, A., Malina, R., Bernstein, G.M., Basa, S., ...
A well-adapted spectrograph concept has been developed for the SNAP (SuperNova/Acceleration Probe) experiment. The goal is to ensure proper identification of Type Ia supernovae and to standardize the...
Wide-field surveys from the SNAP mission (2005)
Kim, A.G., Akerlof, C.W., Aldering, G., Amanullah, R., Astier, P., Barrelet, E., ...
A new measurement of the altitude dependence of the atmospheric muon intensity (2004)
Beatty, J. J., Coutu, S., Minnick, S. A., Bhattacharyya, A., Bower, C. R., Musser, J. A., ...
We present a new measurement of atmospheric muons made during an ascent of the High Energy Antimatter Telescope balloon experiment. The muon charge ratio mu+/mu- as a function of atmospheric depth in...
Overview of the SuperNova/Acceleration probe (SNAP) (2003)
Ealet, A., Prieto, E., Bonissent, A., Malina, R., Bernstein, G.M., Basa, S., ...
Overview of the SuperNova/Acceleration probe (SNAP) (2003)
Ealet, A., Prieto, E., Bonissent, A., Malina, R., Bernstein, G.M., Basa, S., ...
An integral field spectrograph for SNAP supernova studies (2002)
Ealet, Anne, Prieto, E., Bonissent, A., Malina, R., Basa, S., LeFevre, O., ...
Overview of the SuperNova/Acceleration probe (SNAP) (2002)
Aldering, Gregory L., Akerlof, C.W., Amanullah, R., Astier, P., Barrelet, E., Bebek, C., ...
Overview of the SuperNova/Acceleration probe (SNAP) (2002)
Aldering, G., Akerlof, C.W., Amanullah, R., Astier, P., Barrelet, E., Bebek, C., ...
Wide-field surveys from the SNAP mission (2002)
Kim, A.G., Akerlof, C.W., Aldering, G., Amanullah, R., Astier, P., Barrelet, E., ...
Overview of the SuperNova/Acceleration probe (SNAP) (2002)
Aldering, G., Akerlof, C.W., Amanullah, R., Astier, P., Barrelet, E., Bebek, C., ...
Wide-field surveys from the SNAP mission (2002)
Kim, A.G., Akerlof, C.W., Aldering, G., Amanullah, R., Astier, P., Barrelet, E., ...
Observation of Ultraslow Group Velocity of Light in a Solid (2000)
Turukhin, A. V., Sudarshanam, V. S., Shahriar, M. S., Musser, J. A., Hemmer, P. R.
We report ultraslow group velocities of light in a solid. Light speeds as slow as 45 m/s were observed, corresponding to a group delay of 66 ms in a 3-mm thick crystal. Reduction of the group...
Raman Excited Spin Coherences in N-V Diamond (2000)
Hemmer, P. R., Turukhin, A. V., Shahriar, M. S., Musser, J. A.
Raman excited spin coherences were experimentally observed in N-V diamond color centers via nondegenerate four-wave mixing (NDFWM) and electromagnetically induced transparency (EIT). The maximal...
Energy Spectra, Altitude Profiles and Charge Ratios of Atmospheric Muons (2000)
Coutu, S., Beatty, J. J., DuVernois, M. A., Barwick, S. W., Schneider, E., Bhattacharyya, A., ...
We present a new measurement of air shower muons made during atmospheric ascent of the High Energy Antimatter Telescope balloon experiment. The muon charge ratio mu+ / mu- is presented as a function...
Barwick, S. W., Beatty, J. J., Bower, C. R., Chaput, C. J., Coutu, S., De Nolfo, G. A., ...
Observations of cosmic-ray electrons and positrons have been made with a new balloon-borne detector, HEAT (the "High-Energy Antimatter Telescope"), first flown in 1994 May from Fort Sumner, NM. We...
Measurements of the Cosmic-Ray Positron Fraction From 1 to 50 GeV (1997)
Schneider, E., Beatty, J. J., De Nolfo, G. A., Bhattacharyya, A., Bower, C. R., ...
Two measurements of the cosmic-ray positron fraction as a function of energy have been made using the High Energy Antimatter Telescope (HEAT) balloon-borne instrument. The first flight took place...
Flight performance of EXAM -- a balloon-borne detector to search for extragalactic antimatter (1994)
Ahlen, S. P., Loomba, D., Marin, A., Zhou, B., He, Y. D., Price, P. B., ...
We describe the performance of the EXAM detector during its five hour balloon flight in 1988. EXAM is an experiment designed to search for cosmic rays of extragalactic origin which are made of...