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Your search keyword '"Sethumadhavan, B."' showing total 13 results
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13 results on '"Sethumadhavan, B."'

1. Charge Distribution about an Ionizing Electron Track in Liquid Helium

Author

Seidel, G. M., Ito, T. M., Ghosh, A., and Sethumadhavan, B.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Experiment, Nuclear Experiment, Physics - Instrumentation and Detectors
Abstract

The dependence on an applied electric field of the ionization current produced by an energetic electron stopped in liquid helium can be used to determine the spatial distribution of secondary electrons with respect to their geminate partners. An analytic expression relating the current and distribution is derived. The distribution is found to be non-Gaussian with a long tail at larger distances., Comment: 9 pages, 5 figures, submitted to Phys. Rev. C

Published
2013
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2. Potential for Precision Measurement of Solar Neutrino Luminosity by HERON

Author

Huang, Y. H., Lanou, R. E., Maris, H. J., Seidel, G. M., Sethumadhavan, B., and Yao, W.

Subjects
Astrophysics, Nuclear Experiment, Physics - Instrumentation and Detectors
Abstract

Results are presented for a simulation carried out to test the precision with which a detector design (HERON) based on a superfluid helium target material should be able to measure the solar pp and Be7 fluxes. It is found that precisions of +/- 1.68% and +/- 2.97% for pp and Be7 fluxes, respectively, should be achievable in a 5-year data sample. The physics motivation to aim for these precisions is outlined as are the detector design, the methods used in the simulation and sensitivity to solar orbit eccentricity., Comment: 15 pages, 11 figures

Published
2007
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10. Charge Transport in Liquid Helium at Low Temperatures

Author

Sethumadhavan, B., primary, Yao, W., additional, Eguchi, H., additional, Ghosh, A., additional, Huang, Y. H., additional, Kim, Y. H., additional, Lanou, R. E., additional, Maris, H. J., additional, Mocharnuk-Macchia, A. N., additional, and Seidel, G. M., additional

Published
2006
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12. The suitability of sapphire for large-area calorimeters: The transfer of energy to gold films.

Author

Kim, Y. H., Eguchi, H., Enss, C., Fleischmann, A., Huang, Y. H., Lanou, R. E., Maris, H. J., Mocharnuck, A. N., Seidel, G. M., Sethumadhavan, B., and Yao, W.

Subjects
CALORIMETERS, GOLD films, SAPPHIRES
Abstract

The transmission of energy across the interface of a gold film with bulk sapphire has been studied using a metallic magnetic calorimeter. The transfer of energy by both high frequency and thermal phonons is found to be dependent upon the thickness of the gold film. For high frequency phonons the thickness dependence occurs when the size of the attenuation length in gold becomes comparable to the thickness. When the wavelength of the thermal phonons is larger than the thickness of the film, the density of modes of such phonons is altered from that of the bulk and the energy transmission is decreased. [ABSTRACT FROM AUTHOR]

Published
2002

13. Electrical breakdown in helium cells at low temperature.

Author

Sethumadhavan B, Yao W, Huang YH, Lanou RE, Maris HJ, and Seidel GM

Abstract

Electrical breakdown of partially filled helium cells below 0.5 K is shown to be the result of Penning ionization of metastable triplet helium excimers bound to the surface of the liquid.

Published
2006
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