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

Evolutions of the wave signals with respect to the ion–beam energy ε_b, received at 123 mm from the excitation grid in the case of V_pp = 16 V and τ = 3.59 μs. DCS: directly coupled signal; F: fast beam mode; S: slow beam mode; IA: ion–acoustic mode; C: coupled signal; I: instability; P1 and P2: first and second pseudowave signals.