Determination of the masses and momenta of charged particles from multiple scattering measurements in a propane bubble chamber

Kirillov-Ugryumov, V. G.; Kotenko, L.P.; Kuznetsov, E.P.; Самойлов, А. В.

doi:10.1016/0369-643x(58)90004-5

Nuclear Instruments

1958

DOI: 10.1016/0369-643x(58)90004-5

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Determination of the masses and momenta of charged particles from multiple scattering measurements in a propane bubble chamber

V. G. Kirillov-Ugryumov¹,

L.P. Kotenko²,

E.P. Kuznetsov³

et al.

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Physical Measurements on Photographs of Particle Tracks in Bubble Chambers

Pershin¹

1961

Sov. Phys. Usp.

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A highly radiating zone (MARFE) just above the divertor X-point has been used to access the marginal transition regime P sep ≈ P thres to study the existence of a critical point for the L to H transition. Phase transition models predict that at the critical point the transition duration increases and the plasma parameters vary continuously between the L-and H-mode. In these experiments, the L to H transition duration increased 50-100 times over fast transitions. However, the evolution of E r shear, the edge density gradient, the H-mode pedestal, and fluctuations is essentially unchanged from that in fast transitions. The only difference is in the speed with which and the degree to which the fluctuation amplitudes are transiently reduced. This difference is understandable in terms of the time scales for fluctuation amplitude reduction ( 100 µs) and edge pressure gradient increase (several ms), provided the edge fluctuations are pressure-gradient driven.

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Physical Measurements on Photographs of Particle Tracks in Bubble Chambers

Pershin¹

1961

Sov. Phys. Usp.

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Heavy-Liquid Bubble Chambers

Williams¹

1959

Can. J. Phys.

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Experience with some high-Z liquids or fluid mixtures in bubble chambers, at M.I.T. and from other groups, is discussed. Measurement procedures are analyzed, and optimum methods are presented for angle measurements, pβc determination from multiple scattering, and momentum determination from magnetic curvature. Magnetic fields will be useful even in strongly scattering liquids. Combined use of magnetic and scattering determination is not much better than one alone. Results are presented on detection efficiency for high-energy gamma rays, and on the severe effects of radiation straggling on energy measurements on electron pairs.

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Determination of the masses and momenta of charged particles from multiple scattering measurements in a propane bubble chamber

Cited by 2 publications

References 1 publication

Physical Measurements on Photographs of Particle Tracks in Bubble Chambers

Physical Measurements on Photographs of Particle Tracks in Bubble Chambers

Heavy-Liquid Bubble Chambers

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