Observation of double pseudowaves in an ion–beam–plasma system<xref rid="cpb_27_8_085201fn1" ref-type="fn">*</xref> <fn id="cpb_27_8_085201fn1"><label>*</label><p>Project supported by the National Natural Science Foundation of China (Grant Nos. 11575183 and 11705201).</p></fn>

Observation of double pseudowaves in an ion–beam–plasma system* *

Project supported by the National Natural Science Foundation of China (Grant Nos. 11575183 and 11705201).

Wei Zi-An, Ma Jin-Xiu^†, Yi Kai-Yang

Sketch of the experimental setup. A: anode, F: hot filaments; SG: separation grid; CP: cylindrical probe; PP: planar probe; EG: excitation grid; RFEA: retarding field energy analyzer.