We will describe the design and cold-test characterization (i.e., without beam) of a broadband eight-beam, fundamental-mode multiple-beam klystron (MBK), and present preliminary experimental hot-test results. The MBK is designed to have a 3-dB instantaneous bandwidth of ～6% and uses an existing eight-beam electron gun that operates at a nominal cathode voltage of 45 kV and a total current of 32 A [1]. The 3-D particle-in-cell (PIC) code, MAGIC 3D [2], was the principle design tool used to optimize the electrodynamic circuit which consists of a two-gap input cavity, three idler cavities, and a two-gap output cavity [3]. All of the multi-gap cavities operate in the π-mode. The cavity frequencies and Q's are summarized in Table I.
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机译：我们将描述宽带八梁，基本模式多光束Klystron（MBK）的设计和冷测试表征（即，没有光束），并呈现初步实验热试验结果。 MBK设计为具有〜6％的3dB瞬时带宽，并使用现有的八光束电子枪，该八射电子枪以45kV的标称阴极电压和32a [1]的总电流。 3-D粒子 - 细胞（PIC）代码，Magic 3D [2]是用于优化由两个间隙输入腔，三个惰轮腔和双间隙组成的电动电路的原理设计工具输出腔[3]。所有多间隙空腔都在π模式下操作。腔频率和Q的总结在表I中。
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