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Production of high-energy photons from flash x-ray sources powered by stacked Blumlein generators (1990)

Coogan, J. J. ; Davanloo, F. ; Collins, C. B.

[S.l.] : American Institute of Physics (AIP)

Review of Scientific Instruments 61 (1990), S. 1448-1456

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ISSN: 1089-7623

Quelle: AIP Digital Archive

Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik

Notizen: Described here is the design and construction of a pulse-power generator capable of discharging at high repetition rates. It consists of eight triaxial Blumleins stacked in series at one end. These lines are charged in parallel and synchronously commuted with a single thyratron at the other end to produce an open circuit voltage across a stack of six times the charging voltage. An x-ray diode has been constructed and matched to this pulse-power source making possible the emission of an average bremsstrahlung exposure rate of 17 R/S from a sequence of 40-ns pulses. When operated at 60-kV charging voltage, direct spectral measurements show the output to be a true continuum, peaking at intensities in excess of 5×108 photons/keV/shot and containing useful intensities of photons having energies of 300 keV.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.1141150

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Digitale Medien

Observation of screening effect in large-area, cold-cathode diodes (1992)

Coogan, J. J. ; Rose, E. A.

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 60 (1992), S. 2062-2064

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ISSN: 1077-3118

Quelle: AIP Digital Archive

Thema: Physik

Notizen: In this work we report the first observation of the screening effect in large-area, cold-cathode diodes. A framing camera was used to observe the formation of emission centers (ECs) on a 200 cm2 velvet emitter. The density of ECs increased as a function of applied magnetic field as predicted. The current per EC decreased as the magnetic field was increased. These phenomena suggest methods of increasing the spatial and temporal uniformity of high-power electron beams.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.107439

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