| Autor: |
Guangsup Cho, Jae-Jun Ko, Hee Myung Shin, M.C. Choi, Eun Ha Choi, Han-Sup Uhm, Yoonho Seo |
| Rok vydání: |
1997 |
| Předmět: |
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| Zdroj: |
IEEE Transactions on Plasma Science. 25:400-404 |
| ISSN: |
0093-3813 |
| Popis: |
The pulsewidth and rising time of a mildly relativistic electron beam (300 kV, 1-3 kA) passing through a gas-filled diode region are investigated experimentally under various gas pressures P. The pulsewidth and rising time of a relativistic electron beam (REB) were controlled by adjusting the gas pressures P of the diode region. The pulsewidth and rising time of the relativistic electron beam are experimentally found to scale as P/sup -0.807/spl plusmn/0.054/ and P/sup -0.770/spl plusmn/0.058/, respectively. The REB pulsewidth and rising time are shown to have the same scaling law, within the experimental error range as a function of pressure. In particular, the empirical scaling law of the REB pulsewidth is in remarkably good agreement with the numerical scaling law P/sup -0.809/spl plusmn/0.059/ of the full-space charge neutralization time t/sub n/ at which the ion density n/sub i/ is just equal to the electron beam density n/sub b/ at the diode region under a given gas pressure P. It also is found that ion density n/sub i/ at the full space-charge neutralization time t/sub n/ has quite a similar profile in terms of pressure P to that of the REB peak current detected by a Faraday cup. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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