环/螺旋轨道的轨道曲率和曲率半径的精确表达式。

R. Speciale
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摘要

最近,许多多波束速调管(MBK)已经在实验中开发出来,至少有三种不同的MBK型号已经商业化。与单束速调管相比,多束速调管在更低的电子枪电压和更高的总电子枪电流下工作,从而防止了偶发的破坏性电子枪二极管放电,并将功率效率提高了75%。然而,即使在MBK中,功率效率(以输出微波功率与输入直流功率的比率来衡量)仍然是有限的,因为显然不可能从一个急剧聚集的电子束中提取所有的微波能量,而没有高空间电荷密度的减速束迫使它进入不可控的散焦。
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Exact expressions of the orbit-curvature and curvature-radius of the Toroidal/Helical orbits.
Quite recently, a number of multi-beam klystrons (MBK) have been developed experimentally, and at least three different MBK models are already commercially available. Multi-beam klystrons operate at reduced electron-gun voltage, and higher total beam-current than the single-beam designs, thus preventing occasional destructive gun- diode discharges, and increasing the power-efficiency up to ~ 75%. The power-efficiency (measured as the ratio of output microwave power to input DC power) is however still limited, even in MBK, as it is obviously impossible to extract all the microwave energy from a sharply-bunched electron-beam, without having the high space-charge-density of the slowing beam force it into uncontrollable defocusing.
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