Investigation of the mechanism of electron current suppression in an ion diode with magnetic self-insulation

A. Pushkarev, Y. Isakova, V. Guselnikov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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 languageEnglish
Title of host publicationDigest of Technical Papers-IEEE International Pulsed Power Conference
Pages881-887
Number of pages7
DOIs
Publication statusPublished - 2011
Event18th IEEE International Pulsed Power Conference, PPC 2011 - Chicago, IL, United States
Duration: 19 Jun 201123 Jun 2011

Other

Other18th IEEE International Pulsed Power Conference, PPC 2011
CountryUnited States
CityChicago, IL
Period19.6.1123.6.11

Fingerprint

Insulation
Diodes
Electrons
Ions
Ion beams
Protons
Electrodes
Electron emission
Particle accelerators
Anodes
Graphite
Cathodes
Current density
Plasmas
Carbon
Geometry
Chemical analysis

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology

Cite this

Pushkarev, A., Isakova, Y., & Guselnikov, V. (2011). Investigation of the mechanism of electron current suppression in an ion diode with magnetic self-insulation. In Digest of Technical Papers-IEEE International Pulsed Power Conference (pp. 881-887). [6191532] https://doi.org/10.1109/PPC.2011.6191532

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 proceedingConference contribution

Pushkarev, A, Isakova, Y & Guselnikov, V 2011, Investigation of the mechanism of electron current suppression in an ion diode with magnetic self-insulation. in Digest of Technical Papers-IEEE International Pulsed Power Conference., 6191532, pp. 881-887, 18th IEEE International Pulsed Power Conference, PPC 2011, Chicago, IL, United States, 19.6.11. https://doi.org/10.1109/PPC.2011.6191532
Pushkarev A, Isakova Y, Guselnikov V. Investigation of the mechanism of electron current suppression in an ion diode with magnetic self-insulation. In Digest of Technical Papers-IEEE International Pulsed Power Conference. 2011. p. 881-887. 6191532 https://doi.org/10.1109/PPC.2011.6191532
Pushkarev, A. ; Isakova, Y. ; Guselnikov, V. / Investigation of the mechanism of electron current suppression in an ion diode with magnetic self-insulation. Digest of Technical Papers-IEEE International Pulsed Power Conference. 2011. pp. 881-887
@inproceedings{0c2153f419c6445bb0cc8357e2069548,
title = "Investigation of the mechanism of electron current suppression in an ion diode with magnetic self-insulation",
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.",
author = "A. Pushkarev and Y. Isakova and V. Guselnikov",
year = "2011",
doi = "10.1109/PPC.2011.6191532",
language = "English",
isbn = "9781457706295",
pages = "881--887",
booktitle = "Digest of Technical Papers-IEEE International Pulsed Power Conference",

}

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

SN - 9781457706295

SP - 881

EP - 887

BT - Digest of Technical Papers-IEEE International Pulsed Power Conference

ER -