Linear Theory of Instabilities Generated by an Electron Beam in a Metamaterial-Loaded Waveguide
<|begin_of_text|><|start_header_id|>system<|end_header_id|> You are a research archivist expert in dataset metadata. Answer the question truthfully.  <|eot_id|><|start_header_id|>user<|end_header_id|> Here is the Description of a dataset. Description:'We present the linear theory of the starting current of Cherenkov-cyclotron and Cherenkov instabilities generated by an electron beam passing through a metamaterial-loaded waveguide. Effective medium theory is used to represent the metamaterial structure properties. The theory predicts that the instabilities compete, with the Cherenkov-cyclotron mode dominating at lower magnetic ﬁeld and the Cherenkov instability at higher magnetic ﬁeld. The theoretical results are compared to results from recent experiments at MIT using a 490 kV, 84 A electron beam in magnetic ﬁelds of 300 G to 1500 G. For an effective medium model ﬁtted to the MIT experimental parameters, theory predicts that the Cherenkov-cyclotron mode will dominate below 780 G and the Cherenkov mode above 780 G, in good agreement with experimental observations of switching between ' . Please return only a json list of at most 3 Keywords corresponding to the Description:.<|eot_id|><|start_header_id|>assistant<|end_header_id|> {"Answer" : ["Cherenkov radiation","cyclotron instability","high power microwave source","metamaterial","vacuum electronics"]} <|eot_id|>
 Here is the Description of a dataset. Description:'We present the linear theory of the starting current of Cherenkov-cyclotron and Cherenkov instabilities generated by an electron beam passing through a metamaterial-loaded waveguide. Effective medium theory is used to represent the metamaterial structure properties. The theory predicts that the instabilities compete, with the Cherenkov-cyclotron mode dominating at lower magnetic ﬁeld and the Cherenkov instability at higher magnetic ﬁeld. The theoretical results are compared to results from recent experiments at MIT using a 490 kV, 84 A electron beam in magnetic ﬁelds of 300 G to 1500 G. For an effective medium model ﬁtted to the MIT experimental parameters, theory predicts that the Cherenkov-cyclotron mode will dominate below 780 G and the Cherenkov mode above 780 G, in good agreement with experimental observations of switching between ' . Please return only a json list of at most 3 Keywords corresponding to the Description:.
We present the linear theory of the starting current of Cherenkov-cyclotron and Cherenkov instabilities generated by an electron beam passing through a metamaterial-loaded waveguide. Effective medium theory is used to represent the metamaterial structure properties. The theory predicts that the instabilities compete, with the Cherenkov-cyclotron mode dominating at lower magnetic ﬁeld and the Cherenkov instability at higher magnetic ﬁeld. The theoretical results are compared to results from recent experiments at MIT using a 490 kV, 84 A electron beam in magnetic ﬁelds of 300 G to 1500 G. For an effective medium model ﬁtted to the MIT experimental parameters, theory predicts that the Cherenkov-cyclotron mode will dominate below 780 G and the Cherenkov mode above 780 G, in good agreement with experimental observations of switching between 
Cherenkov radiation; cyclotron instability; high power microwave source; metamaterial; vacuum electronics