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Your search keyword '"Hofstadter, R."' showing total 28 results
Start Over Author "Hofstadter, R." Journal ieee transactions on nuclear science
28 results on '"Hofstadter, R."'

1. Performance of the EGRET astronomical gamma ray telescope

Author

Nolan, P.L., Bertsch, D.L., Fichtel, C.E., Hartman, R.C., Hofstadter, R., Hughes, E.B., Hunter, S.D., Kanbach, G., Kniffen, D.A., Lin, Y.C., Mattox, J.R., Mayer-Hasselwander, H.A., Michelson, P.F., Von Montigny, C., Pinkau, K., Rothermel, H., Schneid, E., Sommer, M., Sreekumar, P., and Thompson, D.J.

Subjects
Gamma rays -- Research, Telescope -- Research, Orbiting astronomical observatories -- Research, Business, Electronics, Electronics and electrical industries
Abstract

The performance of the Energetic Gamma Ray Experiment Telescope (EGRET) was evaluated while on orbit. EGRET consist of a multilayer spark chamber, a plastic scintillator trigger hodoscope, a NaI(Tl) calorimeter and a plastic scintillator anticoincidence dome to reject charged particles. The gamma ray telescope measures the highest-energy photons and tests show that its time resolution, angular resolution and gamma ray detection efficiency are within normal limits.

Published
1992

2. Plastic scintillator block as photon beam monitor for EGRET calibration

Author

Lin, Y. C, Hofstadter, R, Nolan, P. L, Walker, A. H, Mattox, J. R, and Hughes, E. B

Subjects
Instrumentation And Photography
Abstract

The EGRET (Energetic Gamma Ray Experiment Telescope) detector has been calibrated at SLAC (Stanford Linear Accelerator) and, to a lesser degree, at the MIT Bates Linear Accelerator Center. To monitor the photon beams for the calibration, a plastic scintillator block, 5 cm x 5 cm in cross section, 15 cm in length, and viewed by a single photomultiplier tube, was used for the entire beam energy range of 15 MeV to 10 GeV. The design operation, and method of analysis of the beam intensity are presented. A mathematical framework has been developed to treat the general case of a beam with multiphoton beam pulses and with a background component. A procedure to deal with the fluctuations of the beam intensity over a data-taking period was also developed. The photon beam monitor is physically sturdy, electronically steady, simple to construct, and easy to operate. Its major merits lie in its sheer simplicity of construction and operation and in the wide energy range it can cover.

Published
1991
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3. Properties of a large NaI(Tl) spectrometer for the energy measurement of high-energy gamma rays on the Gamma Ray Observatory

Author

Hughes, E. B, Finman, L. C, Hofstadter, R, Lepetich, J. E, and Lin, Y. C

Subjects
Spacecraft Instrumentation
Abstract

A large NaI(Tl) spectrometer is expected to play a crucial role in the measurement of the energy spectra from an all-sky survey of high-energy celestial gamma rays on the Gamma Ray Observatory. The crystal size and requirements of space flight have resulted in a novel crystal-packaging and optics combination. The structure of this spectrometer and the operating characteristics determined in a test program using high energy positrons are described.

Published
1986

7. The Crystal Ball Data Acquisition System.

Author

Chestnut, R., Kiesling, C., Bloom, E., Bulos, F., Gaiser, J., Godfrey, G., Oreglia, M., Partridge, R., Peck, C., Porter, F., Aschman, D., Cavali-Sforza, M., Coyne, D., Sadrozinski, H., Kollmann, W., Richardson, M., Strauch, K., Hofstadter, R., Kirkbride, I., and Kolanoski, H.

Published
1979
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13. Calibration of the Egret High-Energy Gamma-Ray Telescope in the Range 20-10,000 MeV with a Tunable Beam of Quasi-Monoenergetic Gamma Rays at SLAC.

Author

Thompson, D. J., Bertsch, D. L., Favale, A., Fichtel, C. E., Hartman, R. C., Hofstadter, R., Hughes, E. B., Hunter, S. D., Hughlock, B. W., Kanbach, G. O., Kniffen, D. A., Lin, Y. C., Mattox, J. R., Mayer-Hasselwander, H., Nolan, P. L., Pinkau, K., Rothermel, H., Schneid, E., Sommer, M., and Walker, A. H.

Published
1987
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19. Use of a Low Energy Proton Accelerator for Calibrating a Large NaI(Tl) Array in a High Energy Physics Experiment

Author

Kirkbride, G. I., O'Reilly, J. G., Tompkins, J. C., Aschman, D. G., Beron, B. L., Bloom, E. D., Bulos, F., Gaiser, J. E., Godfrey, G. L., Hofstadter, R., Hughes, E. B., Kiesling, C. M., Kolanoski, H. F., Kollmann, W. K., Liberman, A. D., Oreglia, M. J., E, Parks, R., Partridge, R. A., Peck, C. W., Porter, F. C., Sadrozinski, H. F., and Strauch, K.

Abstract

We report the use of a 500 keV Van de Graaff proton accelerator to produce ¿-rays in the range 4 - 18 MeV via nuclear reactions for the purpose of calibrating a large NaI(Tl) crystal array. Data analysis indicates an energy calibration to ~ 1% over this range.

Published
1987
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