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Emittance growth from radiation fluctuations

Description: As an electron bunch travels through a transport system, fluctuations in the energy loss of individual electrons cause the size of the bunch to grow. A calculation is given of the quantum-induced growth of the emittance of a beam in one transverse coordinate, making the following approximations: (1) that the transport system is linear; (2) that there is no coupling between the two transverse motions; and (3) that the radiation effects can be described by their values on the central design traje… more
Date: December 1, 1985
Creator: Sands, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Equilibrium fluctuation energy of gyrokinetic plasma

Description: The thermal equilibrium electric field fluctuation energy of the gyrokinetic model of magnetized plasma is computed, and found to be smaller than the well-known result <deltaEdeltaE> (k)/8..pi.. = 1/2T/(1 + (klambda/sub D/)/sup 2/) valid for arbitrarily magnetized plasmas. It is shown that, in a certain sense, the equilibrium electric field energy is minimum in the gyrokinetic regime. 13 refs., 2 figs.
Date: November 1, 1985
Creator: Krommes, J. A.; Lee, W. W. & Oberman, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Neutron resonance averaging with filtered beams

Description: Neutron resonance averaging using filtered beams from a reactor source has proven to be an effective nuclear structure tool within certain limitations. These limitations are imposed by the nature of the averaging process, which produces fluctuations in radiative intensities. The fluctuations have been studied quantitatively. Resonance averaging also gives us information about initial or capture state parameters, in particular the photon strength function. Suitable modifications of the filtered … more
Date: January 1, 1985
Creator: Chrien, R. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Sources for proportional tube gain variation: What to do about it

Description: In the high-energy domain systematic uncertainties become a substantial fraction of attainable energy resolution of a proportional tube electromagnetic calorimeter. Sources of nonuniformity and fluctuation of calorimeter response are discussed and test data on the magnitude of the effects are presented. Possible ways of maintaining these effects under control are discussed and test data are discussed which demonstrated that such effects could in fact be monitored and corrected to less than 1%.
Date: October 1, 1985
Creator: Fukui, Y.; Mishina, M.; Hayashide, Y.; Kanda, S.; Kim, S.; Kondo, K. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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