Abstract
The currents of 5-ns pulsed high-current electron beams produced in a planar vacuum diode with explosive-emission cathodes made of various materials with no external magnetic field at an average electric field strength in the gap of about 300 kV/cm have been measured and time-integrated observation of the optical luminescence of the cathode surface have been performed. Cathodes with a ceramic bushing and spring metal contacts, with ceramic plates set in a magnetic iron matrix, with blades made of stamped exfoliated graphite (Graflex), with blades made of foil fiberglass plastic, and a composite cathode made of crystalline boron and copper powders were tested. The current carried by one emission center has been estimated to range between 5 and 20 A for various cathodes. For the metal-dielectric cathode, the velocity of expansion of the cathode plasma over the ceramic surface has been estimated as 2·107 cm/s. The lifetimes of the cathodes at a pulse repetition rate of 50 Hz have been investigated.
| Original language | English |
|---|---|
| Pages (from-to) | 772-780 |
| Number of pages | 9 |
| Journal | Russian Physics Journal |
| Volume | 55 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 1 Dec 2012 |
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Keywords
- cathode plasma
- composite cathode
- explosive emission
- high-current nanosecond electron beam
- metal-ceramic cathode
- Vacuum diode
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Current characteristics of quasi-planar vacuum diodes with explosive-emission cathodes made of various materials at a high-voltage pulse duration of a few nanoseconds. / Afanas'ev, K. V.; Vagner, M. I.; Kutenkov, O. P.; Pegel, I. V.; Pribytkov, G. A.; Rostov, V. V.; Tarakanov, V. P.
In: Russian Physics Journal, Vol. 55, No. 7, 01.12.2012, p. 772-780.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Current characteristics of quasi-planar vacuum diodes with explosive-emission cathodes made of various materials at a high-voltage pulse duration of a few nanoseconds
AU - Afanas'ev, K. V.
AU - Vagner, M. I.
AU - Kutenkov, O. P.
AU - Pegel, I. V.
AU - Pribytkov, G. A.
AU - Rostov, V. V.
AU - Tarakanov, V. P.
PY - 2012/12/1
Y1 - 2012/12/1
N2 - The currents of 5-ns pulsed high-current electron beams produced in a planar vacuum diode with explosive-emission cathodes made of various materials with no external magnetic field at an average electric field strength in the gap of about 300 kV/cm have been measured and time-integrated observation of the optical luminescence of the cathode surface have been performed. Cathodes with a ceramic bushing and spring metal contacts, with ceramic plates set in a magnetic iron matrix, with blades made of stamped exfoliated graphite (Graflex), with blades made of foil fiberglass plastic, and a composite cathode made of crystalline boron and copper powders were tested. The current carried by one emission center has been estimated to range between 5 and 20 A for various cathodes. For the metal-dielectric cathode, the velocity of expansion of the cathode plasma over the ceramic surface has been estimated as 2·107 cm/s. The lifetimes of the cathodes at a pulse repetition rate of 50 Hz have been investigated.
AB - The currents of 5-ns pulsed high-current electron beams produced in a planar vacuum diode with explosive-emission cathodes made of various materials with no external magnetic field at an average electric field strength in the gap of about 300 kV/cm have been measured and time-integrated observation of the optical luminescence of the cathode surface have been performed. Cathodes with a ceramic bushing and spring metal contacts, with ceramic plates set in a magnetic iron matrix, with blades made of stamped exfoliated graphite (Graflex), with blades made of foil fiberglass plastic, and a composite cathode made of crystalline boron and copper powders were tested. The current carried by one emission center has been estimated to range between 5 and 20 A for various cathodes. For the metal-dielectric cathode, the velocity of expansion of the cathode plasma over the ceramic surface has been estimated as 2·107 cm/s. The lifetimes of the cathodes at a pulse repetition rate of 50 Hz have been investigated.
KW - cathode plasma
KW - composite cathode
KW - explosive emission
KW - high-current nanosecond electron beam
KW - metal-ceramic cathode
KW - Vacuum diode
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U2 - 10.1007/s11182-012-9880-8
DO - 10.1007/s11182-012-9880-8
M3 - Article
VL - 55
SP - 772
EP - 780
JO - Russian Physics Journal
JF - Russian Physics Journal
SN - 1064-8887
IS - 7
ER -