Abstract
Current characteristics and operating lifetime of the explosive emission cathode based on a carbon microfiber are investigated in the pulsed-periodic mode of operation with pulse duration of about 5 ns. Long-term (for up to 3.6 million pulses) tests of the cathode operating lifetime are carried out. Specific ablation of the fiber material equal to 2.4·10–4 g/C is obtained. Change in the morphology of the fiber surface during long-time operation caused by deposition of carbon from the cathode plasma is revealed. The microscopic electric field strength on the fiber surface is estimated taking into account the surface microrelief. The efficiency of microwave generation comparable with that of a velvet cathode in low (200 kV/cm) average electric field in the gap is obtained for the Cherenkov microwave generator with vacuum diode without external magnetic field of decimeter wavelength range based on the SINUS-7 pulsed-periodic high-current electron accelerator with current pulse duration of 50 ns. The operating lifetime no less than 105 pulses is demonstrated for the carbon fiber-based cathode of the microwave generator operating in the mode of pulse batch with duration of several seconds and pulse repetition frequency of 20–50 Hz.
| Original language | English |
|---|---|
| Pages (from-to) | 565-572 |
| Number of pages | 8 |
| Journal | Russian Physics Journal |
| Volume | 57 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 1 Jan 2014 |
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Keywords
- Carbon fiber
- Explosive electron emission
- Field gain
- High-current nanosecond electron beam
- Multi-pit cathode
- operating lifetime of the explosive emission cathode
- Plasma deposition
- Specific ablation of material
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Explosive Emission Cathode Based on a Carbon Fiber for Long-Term Pulsed-Periodic Mode of Operation and its Application in a High-Power Microwave Pulse Generator Without External Magnetic Field. / Kutenkov, O. P.; Pegel, I. V.; Totmeninov, E. M.
In: Russian Physics Journal, Vol. 57, No. 5, 01.01.2014, p. 565-572.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Explosive Emission Cathode Based on a Carbon Fiber for Long-Term Pulsed-Periodic Mode of Operation and its Application in a High-Power Microwave Pulse Generator Without External Magnetic Field
AU - Kutenkov, O. P.
AU - Pegel, I. V.
AU - Totmeninov, E. M.
PY - 2014/1/1
Y1 - 2014/1/1
N2 - Current characteristics and operating lifetime of the explosive emission cathode based on a carbon microfiber are investigated in the pulsed-periodic mode of operation with pulse duration of about 5 ns. Long-term (for up to 3.6 million pulses) tests of the cathode operating lifetime are carried out. Specific ablation of the fiber material equal to 2.4·10–4 g/C is obtained. Change in the morphology of the fiber surface during long-time operation caused by deposition of carbon from the cathode plasma is revealed. The microscopic electric field strength on the fiber surface is estimated taking into account the surface microrelief. The efficiency of microwave generation comparable with that of a velvet cathode in low (200 kV/cm) average electric field in the gap is obtained for the Cherenkov microwave generator with vacuum diode without external magnetic field of decimeter wavelength range based on the SINUS-7 pulsed-periodic high-current electron accelerator with current pulse duration of 50 ns. The operating lifetime no less than 105 pulses is demonstrated for the carbon fiber-based cathode of the microwave generator operating in the mode of pulse batch with duration of several seconds and pulse repetition frequency of 20–50 Hz.
AB - Current characteristics and operating lifetime of the explosive emission cathode based on a carbon microfiber are investigated in the pulsed-periodic mode of operation with pulse duration of about 5 ns. Long-term (for up to 3.6 million pulses) tests of the cathode operating lifetime are carried out. Specific ablation of the fiber material equal to 2.4·10–4 g/C is obtained. Change in the morphology of the fiber surface during long-time operation caused by deposition of carbon from the cathode plasma is revealed. The microscopic electric field strength on the fiber surface is estimated taking into account the surface microrelief. The efficiency of microwave generation comparable with that of a velvet cathode in low (200 kV/cm) average electric field in the gap is obtained for the Cherenkov microwave generator with vacuum diode without external magnetic field of decimeter wavelength range based on the SINUS-7 pulsed-periodic high-current electron accelerator with current pulse duration of 50 ns. The operating lifetime no less than 105 pulses is demonstrated for the carbon fiber-based cathode of the microwave generator operating in the mode of pulse batch with duration of several seconds and pulse repetition frequency of 20–50 Hz.
KW - Carbon fiber
KW - Explosive electron emission
KW - Field gain
KW - High-current nanosecond electron beam
KW - Multi-pit cathode
KW - operating lifetime of the explosive emission cathode
KW - Plasma deposition
KW - Specific ablation of material
UR - http://www.scopus.com/inward/record.url?scp=84919926914&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84919926914&partnerID=8YFLogxK
U2 - 10.1007/s11182-014-0277-8
DO - 10.1007/s11182-014-0277-8
M3 - Article
VL - 57
SP - 565
EP - 572
JO - Russian Physics Journal
JF - Russian Physics Journal
SN - 1064-8887
IS - 5
ER -