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You searched on: Author: kevin coakley

Displaying records 31 to 40 of 57 records.
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31. Nonlinear Modeling of Tunnel Diode Detectors
Published: 9/24/2004
Authors: David K Walker, Kevin J Coakley, Jolene D Splett
Abstract: We investigate the sensitivity and nonlinear properties of a tunnel diode microwave detector as functions of the input power and the load impedance presented at the detector's output. We compare the two-tone method estimate of nonlinearity with preci ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=31739

32. Chaotic Scattering and Escape Times of Marginally Trapped Ultracold Neutrons
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: of
Published: 4/1/2004
Authors: Kevin J Coakley, J M Doyle, S N Dzhosyuk, L Yang, Paul R Huffman
Abstract: We compute classical trajectories of Ultracold neutrons (UCNs) in a superconducting Ioffe-type magnetic trap using a symplectic integration method. We find that the computed escape time for a particular set of initial conditions (momentum and posit ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150571

33. Adaptive Characterization of Jitter Noise in Sampled High-Speed Signals
Published: 10/1/2003
Authors: Kevin J Coakley, Chih-Ming Wang, Paul D Hale, Tracy S. Clement
Abstract: We estimate the root-mean-square (RMS) value of timing jitter noise in simulated signals similar to measured high-speed sampled signals. The simulated signals are contaminated by additive noise, timing jitter noise, and time shift errors. Before e ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=51084

34. Erratum: Modeling Detector Response for Neutron Depth Profiling
Published: 8/10/2003
Authors: Kevin J Coakley, R. G. Downing, George Paul Lamaze, H C Hofsass, C Ronning, J Biegel
Abstract: In a previous paper, we analyzed the Neutron Depth Profiling energy spectrum collected from a diamond-like carbon (DLC) sample doped with boron. Based on a numerical model for the Detector Response Function (DRF), we estimated a theoretical boron pr ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50792

35. Two Aspects of Thin Film Analysis: Boron Profile and Scattering Length Density Profile
Published: 6/1/2003
Authors: Huaiyu H Chen-Mayer, George Paul Lamaze, Kevin J Coakley, Sushil K Satija
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903301

36. Spatial Methods for Event Reconstruction in CLEAN
Published: 4/9/2003
Authors: Kevin J Coakley, D N Mckinsey
Abstract: In CLEAN (Cryogenic Low Energy Astrophysics with Noble gases), a proposed neutrino and dark matter detector, background discrimination is possible if one can determine the location of an event with high accuracy. Here, we develop spatial methods fo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50793

37. Estimation of Q-Factors and Resonant Frequencies
Published: 3/1/2003
Authors: Kevin J Coakley, Jolene D Splett, Michael D Janezic, R F Kaiser
Abstract: We estimate the quality factor Q and resonant frequency f^do^ of a microwave cavity based on resonance curve observations on an equally-spaced frequency grid. The observed resonance curve is the squared magnitude of an observed complex scattering pa ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=151782

38. Estimation of Q-factors and Resonant Factors
Published: 3/1/2003
Authors: Kevin J Coakley, Jolene D Splett, Michael D Janezic, Raian K. Kaiser
Abstract: We estimate the quality factor Q and resonant frequency f^d0^ of a microwave cavity based on resonance curve observations on an equally-spaced frequency grid. The observed resonance curve is the squared magnitude of an observed complex scattering par ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=31477

39. Supernova Observation Via Neutrino-Nucleus Elastic Scattering in the CLEAN Detector
Published: 2/1/2003
Authors: C J Horowitz, Kevin J Coakley, D N Mckinsey
Abstract: Development of large mass detectors for low energy neutrinos and dark matter may allow supernova detection via neutrino-nucleus elastic scattering. An elastic detector could observe a few, or more, events per ton for a galactic supernova at 10 kpc ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50799

40. Estimation of Neutron Mean Wavelength From Rocking Curve Data
Published: 1/1/2003
Authors: Kevin J Coakley, Z Chowdhuri, W M. Snow, J M Richardson, Maynard S Dewey
Abstract: At NIST, an in-beam neutron lifetime experiment is underway. In part of the experiment, a neutron detector is calibrated. The accuracy of the detector calibration depends, in part, on how accurately the mean wavelength of a neutron beam can be esti ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=151787



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