Abstract
The results of a study of the generation of a pulsed ion beam of gigawatt power formed by a diode with an explosive-emission potential electrode in a mode of magnetic self-insulation are presented. The studies were conducted at the TEMP-4M ion accelerator set in double pulse formation mode: the first pulse was negative (300-500 ns and 100-150 kV) and the second positive (150 ns, 250-300 kV). The ion current density was 20-40 A/cm 2; the beam composition was protons and carbon (70%) ions. It was shown that plasma is effectively formed over the entire working surface of the graphite potential electrode. During the ion beam generation a condition of magnetic cutoff of electrons along the entire length of the diode (B/B cr ≥ 4) is fulfilled. Because of the high drift rate the residence time of the electrons and protons in the anode-cathode gap is 3-5 ns, while for the C + ions it is more than 8 ns. This denotes low efficiency of magnetic self-insulation in a diode of such a design. At the same time it has been experimentally observed that during the generation of ion current (second pulse) the electronic component of the total current is suppressed by a factor of 1.5-2 for a strip diode with plane and focusing geometry. A new model of the effect of limiting the electron emission explaining the decrease in the electronic component of the total current in a diode with magnetic self-insulation is proposed.
| Original language | English |
|---|---|
| Title of host publication | Digest of Technical Papers-IEEE International Pulsed Power Conference |
| Pages | 881-887 |
| Number of pages | 7 |
| DOIs | |
| Publication status | Published - 2011 |
| Event | 18th IEEE International Pulsed Power Conference, PPC 2011 - Chicago, IL, United States Duration: 19 Jun 2011 → 23 Jun 2011 |
Other
| Other | 18th IEEE International Pulsed Power Conference, PPC 2011 |
|---|---|
| Country | United States |
| City | Chicago, IL |
| Period | 19.6.11 → 23.6.11 |
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ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Energy Engineering and Power Technology
Cite this
Investigation of the mechanism of electron current suppression in an ion diode with magnetic self-insulation. / Pushkarev, A.; Isakova, Y.; Guselnikov, V.
Digest of Technical Papers-IEEE International Pulsed Power Conference. 2011. p. 881-887 6191532.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Investigation of the mechanism of electron current suppression in an ion diode with magnetic self-insulation
AU - Pushkarev, A.
AU - Isakova, Y.
AU - Guselnikov, V.
PY - 2011
Y1 - 2011
N2 - The results of a study of the generation of a pulsed ion beam of gigawatt power formed by a diode with an explosive-emission potential electrode in a mode of magnetic self-insulation are presented. The studies were conducted at the TEMP-4M ion accelerator set in double pulse formation mode: the first pulse was negative (300-500 ns and 100-150 kV) and the second positive (150 ns, 250-300 kV). The ion current density was 20-40 A/cm 2; the beam composition was protons and carbon (70%) ions. It was shown that plasma is effectively formed over the entire working surface of the graphite potential electrode. During the ion beam generation a condition of magnetic cutoff of electrons along the entire length of the diode (B/B cr ≥ 4) is fulfilled. Because of the high drift rate the residence time of the electrons and protons in the anode-cathode gap is 3-5 ns, while for the C + ions it is more than 8 ns. This denotes low efficiency of magnetic self-insulation in a diode of such a design. At the same time it has been experimentally observed that during the generation of ion current (second pulse) the electronic component of the total current is suppressed by a factor of 1.5-2 for a strip diode with plane and focusing geometry. A new model of the effect of limiting the electron emission explaining the decrease in the electronic component of the total current in a diode with magnetic self-insulation is proposed.
AB - The results of a study of the generation of a pulsed ion beam of gigawatt power formed by a diode with an explosive-emission potential electrode in a mode of magnetic self-insulation are presented. The studies were conducted at the TEMP-4M ion accelerator set in double pulse formation mode: the first pulse was negative (300-500 ns and 100-150 kV) and the second positive (150 ns, 250-300 kV). The ion current density was 20-40 A/cm 2; the beam composition was protons and carbon (70%) ions. It was shown that plasma is effectively formed over the entire working surface of the graphite potential electrode. During the ion beam generation a condition of magnetic cutoff of electrons along the entire length of the diode (B/B cr ≥ 4) is fulfilled. Because of the high drift rate the residence time of the electrons and protons in the anode-cathode gap is 3-5 ns, while for the C + ions it is more than 8 ns. This denotes low efficiency of magnetic self-insulation in a diode of such a design. At the same time it has been experimentally observed that during the generation of ion current (second pulse) the electronic component of the total current is suppressed by a factor of 1.5-2 for a strip diode with plane and focusing geometry. A new model of the effect of limiting the electron emission explaining the decrease in the electronic component of the total current in a diode with magnetic self-insulation is proposed.
UR - http://www.scopus.com/inward/record.url?scp=84861414391&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84861414391&partnerID=8YFLogxK
U2 - 10.1109/PPC.2011.6191532
DO - 10.1109/PPC.2011.6191532
M3 - Conference contribution
AN - SCOPUS:84861414391
SN - 9781457706295
SP - 881
EP - 887
BT - Digest of Technical Papers-IEEE International Pulsed Power Conference
ER -