### Abstract

The motion of high-energy electrons was studied in a helium hollow cathode discharge using Monte Carlo simulation. The calculations were carried out in the pressure range of 2-10 mbar. The length of the cathode dark space (CDS) was determined by simulation in an iterative way using experimental voltage-current density characteristics of the discharge. At the lowest helium pressure (2 mbar) the concentration of high-energy electrons was found to be the same at the CDS-negative glow boundary and at the midplane of the discharge while at 8 mbars it was found to be by 1-2 orders of magnitude smaller. The results of our calculations support the existence of “oscillating” electrons. The probability of 1, 2 and 3 transfers through the negative glow (NG) for primary electrons was found to be 37%, 11 % and 2%, respectively, at 2 mbar pressure. The spatial distribution of ionizations and the angular distribution of electron velocity at the CDS-NG boundary were also investigated. The pressure dependence of the current balance at the cathode was obtained, and the results indicate that with decreasing pressure other secondary emission processes than ion impact become important in the maintenance of the discharge.

Original language | English |
---|---|

Pages (from-to) | 457-464 |

Number of pages | 8 |

Journal | Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences |

Volume | 48 |

Issue number | 3 |

DOIs | |

Publication status | Published - Mar 1 1993 |

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### Keywords

- Current balance
- Electron energy distribution
- Hollow cathode discharge
- Monte Carlo simulation
- Oscillating electrons

### ASJC Scopus subject areas

- Mathematical Physics
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry

### Cite this

**A Study of the Motion of High-Energy Electrons in a Helium Hollow Cathode Discharge.** / Donkó, Z.

Research output: Contribution to journal › Article

}

TY - JOUR

T1 - A Study of the Motion of High-Energy Electrons in a Helium Hollow Cathode Discharge

AU - Donkó, Z.

PY - 1993/3/1

Y1 - 1993/3/1

N2 - The motion of high-energy electrons was studied in a helium hollow cathode discharge using Monte Carlo simulation. The calculations were carried out in the pressure range of 2-10 mbar. The length of the cathode dark space (CDS) was determined by simulation in an iterative way using experimental voltage-current density characteristics of the discharge. At the lowest helium pressure (2 mbar) the concentration of high-energy electrons was found to be the same at the CDS-negative glow boundary and at the midplane of the discharge while at 8 mbars it was found to be by 1-2 orders of magnitude smaller. The results of our calculations support the existence of “oscillating” electrons. The probability of 1, 2 and 3 transfers through the negative glow (NG) for primary electrons was found to be 37%, 11 % and 2%, respectively, at 2 mbar pressure. The spatial distribution of ionizations and the angular distribution of electron velocity at the CDS-NG boundary were also investigated. The pressure dependence of the current balance at the cathode was obtained, and the results indicate that with decreasing pressure other secondary emission processes than ion impact become important in the maintenance of the discharge.

AB - The motion of high-energy electrons was studied in a helium hollow cathode discharge using Monte Carlo simulation. The calculations were carried out in the pressure range of 2-10 mbar. The length of the cathode dark space (CDS) was determined by simulation in an iterative way using experimental voltage-current density characteristics of the discharge. At the lowest helium pressure (2 mbar) the concentration of high-energy electrons was found to be the same at the CDS-negative glow boundary and at the midplane of the discharge while at 8 mbars it was found to be by 1-2 orders of magnitude smaller. The results of our calculations support the existence of “oscillating” electrons. The probability of 1, 2 and 3 transfers through the negative glow (NG) for primary electrons was found to be 37%, 11 % and 2%, respectively, at 2 mbar pressure. The spatial distribution of ionizations and the angular distribution of electron velocity at the CDS-NG boundary were also investigated. The pressure dependence of the current balance at the cathode was obtained, and the results indicate that with decreasing pressure other secondary emission processes than ion impact become important in the maintenance of the discharge.

KW - Current balance

KW - Electron energy distribution

KW - Hollow cathode discharge

KW - Monte Carlo simulation

KW - Oscillating electrons

UR - http://www.scopus.com/inward/record.url?scp=33747372088&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33747372088&partnerID=8YFLogxK

U2 - 10.1515/zna-1993-0303

DO - 10.1515/zna-1993-0303

M3 - Article

AN - SCOPUS:33747372088

VL - 48

SP - 457

EP - 464

JO - Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences

JF - Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences

SN - 0932-0784

IS - 3

ER -