| Autor: |
I. A. Chernyavskiy, D. Chernin, A.N. Vlasov, B. Levush, T.M. Antonsen, J. Legarra |
| Rok vydání: |
2011 |
| Předmět: |
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| Zdroj: |
2011 Abstracts IEEE International Conference on Plasma Science. |
| Popis: |
Summary form only given. Coupled-cavity travelling-wave tubes (TWTs) are well-known microwave devices that are capable of producing high amplification at high frequencies and with a wide bandwidth. In recent years a series of Ka-band coupled-cavity TWTs has been successfully developed, built, and tested at CPI in collaboration with the NRL and SAIC. The design and optimization of the coupled cavity TWTs include their modeling using different simulation tools. One such tool is the large-signal 2.5D code TESLA-CC. TESLA CC resolves features very important to the device's operation, including an accurate reproduction of the EM-fields inside the beam-tunnel and inclusion of 2D effects, such as focusing by a finite non-uniform magnetic field and transverse motion of the beam electrons. We present here results of the TESLA-CC modeling of the experimental coupled-cavity TWTs and detailed comparisons of such modeling with experimental data. These comparisons were performed for different regimes of the device's operation, including the small signal, intermediate and large signal (near-saturation) regimes. Varying the main parameters of the device helped us to find the best match with experimental data and helped to resolve an observed discrepancy between measurements and the code's predictions. The work performed here can be considered as a validation study for the code TESLA-CC, which will contribute in the understanding of this type of devices' operation and to the process of its optimization. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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