Microdosimetry II. Use of secondary electron emission to simulate two target models
نویسندگان
چکیده
منابع مشابه
Secondary electron emission studies
Secondary-electron-emission processes under electron bombardment play an important role in the performance of a variety of electron devices. While in some devices, the anode and the grid require materials that suppress the secondary-electron-generation process, the crossed-field amplifier (CFA) is an example where the cathode requires an efficient secondaryelectron-emission material. Secondary-...
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The secondary electron emission (SEE) yields were calculated for various materials and a good comparison has been obtained with the experimental data for gold measured at ANL. The calculation method uses Monte Carlo simulation, empirical theories, and close comparison to experiment, in order to parameterize the SEE yields of highly emissive materials for microchannel plates. The simulation resu...
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A bounded plasma where the hot electrons impacting the walls produce more than one secondary on average is studied via particle-in-cell simulation. It is found that no classical Debye sheath or space-charge-limited sheath exists. Ions are not drawn to the walls and electrons are not repelled. Hence the unconfined plasma electrons travel unobstructed to the walls, causing extreme particle and en...
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Grooved surfaces are effective to suppress the secondary electron emission, and can be a promising technique to mitigate the electron cloud effect in positron/proton storage rings. Aiming for the application in a dipole-type magnetic field, various shapes of triangular grooved surfaces have been studied at KEK. The grooves tested here have vertex angles of 20−30°, depths of 2.5−5.0 mm, and vert...
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ژورنال
عنوان ژورنال: Acta Radiologica: Oncology
سال: 1980
ISSN: 0349-652X
DOI: 10.3109/02841868009130154