Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Johnny S. T. Ng"'
Autor:
R. Hupe, Joshua A. Gordon, J. Lam, Patrick Allison, Konstantin Belov, D.R. Walz, B. Dailey, R. J. Nichol, C. L. Hebert, P. F. Dowkontt, J. Kowalski, D. Z. Besson, J. Stockham, Andres Romero-Wolf, John G. Learned, Pisin Chen, M. Mottram, G. S. Varner, D. Goldstein, K. J. Palladino, C. J. Naudet, S. Matsuno, J. M. Clem, B. Rotter, Cosmin Deaconu, B. C. Mercurio, J. T. Link, Elizabeth R Lusczek, J. J. Beatty, Amy Connolly, Tsung-Che Liu, L. L. Ruckman, B. D. Fox, Michael DuVernois, Peter Gorham, Harm Schoorlemmer, P. Cao, K. Mulrey, K. M. Liewer, L. Cremonesi, Chiang-Mei Chen, S. Hoover, J. W. Russell, M. Stockham, Stephanie Wissel, David Saltzberg, Abigail G. Vieregg, D. Seckel, B. Strutt, P. Miočinović, Jiwoo Nam, K. Hughes, R. C. Field, Johnny S. T. Ng, F. Wu, W. R. Binns, O. Banerjee, M. Rosen, A. Javaid, C. Hast, Brian Rauch, C. Miki, B. Hill, S. Stafford, M. H. Israel, Kevin Reil, J. Roberts, K. Tatem, V. Bugaev
Publikováno v:
Physical review letters. 117(7)
We report on four radio-detected cosmic-ray (CR) or CR-like events observed with the Antarctic Impulsive Transient Antenna (ANITA), a NASA-sponsored long-duration balloon payload. Two of the four were previously identified as stratospheric CR air sho
Autor:
F. Cooper, B. Kuekan, M.T.F. Pivi, D. Kharakh, R.E. Kirby, Johnny S. T. Ng, Tor Raubenheimer, C.M. Spencer, Lanfa Wang, F. K. King
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 621:33-38
The first experimental observation of magnetic resonances in electron clouds is reported. The resonance was observed as a modulation in cloud intensity for uncoated as well as TiN-coated aluminum surfaces in the positron storage ring of the PEP-II co
Autor:
Johnny S. T. Ng, Robert Teed, Sunil Bodapati, Shay Keren, Bryan Ronain Smith, Meike L. Schipper, Adam de la Zerda, Sanjiv S. Gambhir
Publikováno v:
Molecular Imaging and Biology. 12:500-508
Purpose: We quantified the performance of time-domain imaging (TDI) and spectral imaging (SI) for fluorescence imaging of quantum dots (QDs) in three distinct imaging instruments: eXplore Optix (TDI, Advanced Research Technologies Inc.), Maestro (SI,
Autor:
M. Ueno, G. S. Varner, Pisin Chen, Y. Umeki, C. Marini Bettolo, Stefan Larsson, T. Thurston, T. Tanaka, Hiromitsu Takahashi, G. Bogaert, N. Kawai, Mark Pearce, Mózsi Kiss, T. Kamae, Felix Ryde, Y. Kanai, Wlodzimierz Klamra, Grzegorz Madejski, S. Kishimoto, Magnus Axelsson, Makoto Arimoto, Tadayuki Takahashi, Tsunefumi Mizuno, H. Tajima, Yasushi Fukazawa, S. Rydström, W. Craig, J. Katsuta, Hiroaki Yoshida, Jun Kataoka, Shuichi Gunji, Johnny S. T. Ng, K. Kurita
Publikováno v:
Nuclear Instruments & Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment. 600(3):609-617
The energy response of plastic scintillators (Eljen Technology EJ-204) to polarized soft gamma-ray photons below 100 keV has been studied, primarily for the balloon-borne polarimeter, PoGOLite. The response calculation includes quenching effects due
Autor:
W-Y. Pauchy Hwang, J. R. Thomas, Douglas Bergman, D. Walz, B. F. Jones, F. Y. Chang, John Belz, Pierre Sokolsky, C. W. Chen, Johnny S. T. Ng, Rasha Abbasi, Pisin Chen, C. C. Chen, Gordon Thomson, Kevin Reil, Y. Fedorova, D. Rodriguez, J. D. Smith, M. Dalton, N. Manago, Z. Cao, A.C. Odian, John N. Matthews, P. Hüntemeyer, M. A. Huang, R. W. Springer, Guey-Lin Lin, C. C. H. Jui, S. B. Thomas, R. Iverson, K. Martens, A. Zech, C. Field, Tareq Abu-Zayyad, E. C. Loh, Konstantin Belov, C. Hast, M. M. Maestas
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 597:37-40
A key assumption in the reconstruction of extensive air showers using the air fluorescence technique is that fluorescence is proportional to energy deposition at all depths in the shower. This ansatz, along with the supposition that particle distribu
Autor:
C. Hast, A.C. Odian, John Belz, M. A. Huang, R. W. Springer, M. Dalton, Rasha Abbasi, R. Iverson, Pierre Sokolsky, Douglas Bergman, C. C. H. Jui, Johnny S. T. Ng, C. Field, F. Y. Chang, J. R. Thomas, S. B. Thomas, J. D. Smith, D. Walz, Gordon Thomson, Tareq Abu-Zayyad, C. W. Chen, P. Hüntemeyer, Guey-Lin Lin, N. Manago, Pisin Chen, Z. Cao, Y. Fedorova, E. C. Loh, D. Rodriguez, John N. Matthews, K. Martens, A. Zech, M. M. Maestas, Konstantin Belov, W-Y. Pauchy Hwang, C. C. Chen, Kevin Reil, B. F. Jones
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 597:32-36
The fluorescence yield in air is reported for wavelength and pressure ranges of interest to ultra-high energy cosmic ray detectors. A 28.5 GeV electron beam was used to excite the fluorescence. Central to the approach was the system calibration, usin
Autor:
Johnny S. T. Ng, Tuneyoshi Kamae, Hiroaki Yoshida, Felix Ryde, Hiromitsu Takahashi, Tomas Ekeberg, Tadayuki Takahashi, Timothy Thurston, Nobuyuki Kawai, Per Carlson, Stefan Larsson, Kazuhide Yamamoto, Markus Suhonen, M. Ueno, William Craig, Mark Pearce, T. Tanaka, Olle Engdegård, G. S. Varner, Tsunefumi Mizuno, Grzegorz Madejski, G. Bogaert, Jun Kataoka, Makoto Arimoto, L. Hjalmarsdotter, Viktor Andersson, Shuichi Gunji, Yasushi Fukazawa, Bianca Iwan, C. I. Bjornsson, Mózsi Kiss, Tomi Ylinen, Hiroyasu Tajima, Jaroslav Kazejev, Y. Kanai, Magnus Axelsson, Cecilia Marini Bettolo, Y. Yamashita, Wlodzimierz Klamra
Publikováno v:
Astroparticle Physics. 30:72-84
We describe a new balloon-borne instrument (PoGOLite) capable of detecting 10% polarisation from 200mCrab point-like sources between 25 and 80keV in one 6 hour flight. Polarisation measurements in the soft gamma-ray band are expected to provide a pow
Autor:
A. Romero-Wolf, David Saltzberg, J. Jenkins, J. Kowalski, D. Walz, M. H. Israel, D. Z. Besson, Paul Dowkontt, Elizabeth R Lusczek, B. C. Mercurio, G. S. Varner, L. L. Ruckman, M. A. DuVernois, J. W. Nam, A. Goodhue, D. Seckel, Kurt Liewer, J. T. Link, R. Nichol, C. Hast, A. Connolly, C. Miki, F. Wu, Johnny S. T. Ng, Peter Gorham, S. Matsuno, J. J. Beatty, P. Miočinović, Kevin Reil, Charles J. Naudet, M. W. E. Smith, S. Hoover, S. W. Barwick, J. M. Clem, W. R. Binns, C. L. Hebert, Pisin Chen, R. C. Field, D. Goldstein, M. Rosen, K. J. Palladino, Chuan-Hua Chen, John G. Learned
Publikováno v:
Astroparticle Physics. 29:130-157
Radiowave detection of the Cherenkov radiation produced by neutrino-ice collisions requires an understanding of the radiofrequency (RF) response of cold polar ice. We herein report on a series of radioglaciological measurements performed approximatel
Autor:
Johnny S. T. Ng, Magnus Axelsson, T. Thurston, C. I. Bjornsson, B. Craig, H. Tajima, Tadayuki Takahashi, Pisin Chen, Makoto Arimoto, Tsunefumi Mizuno, Grzegorz Madejski, Y. Kanai, Hiromitsu Takahashi, T. Tanaka, Yasushi Fukazawa, G. Bogaert, Yoshitaka Saito, P. Carlson, Mózsi Kiss, Wlodzimierz Klamra, C. Marini Bettolo, M. Ueno, T. Kamae, G. S. Varner, Jun Kataoka, Shuichi Gunji, Mark Pearce, N. Kawai, Keiichiro Yamamoto, R. Rogers, Felix Ryde, S. Larsson
Publikováno v:
Physica E Low-Dimensional Systems and Nanostructures. 40:438-441
著者人数: 32名
資料番号: SA1000094000
資料番号: SA1000094000
Autor:
Johnny S. T. Ng, Robert H. Simmons
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 575:334-342
A monitor system suitable for the accurate measurement of the total charge of a 2-ps 28.5 GeV electron beam over a large dynamic range is described. Systematic uncertainties and results on absolute calibration, resolution, and long-term stability are