Investigation of emission instabilities of liquid metal ion sources

Ch Akhmadaliev; L. Bischoff; G. L.R. Mair; C. J. Aidinis; Th Ganetsos

doi:10.1016/j.mee.2004.02.027

Investigation of emission instabilities of liquid metal ion sources

Ch Akhmadaliev
, L. Bischoff
, G. L.R. Mair
, C. J. Aidinis
, Th Ganetsos

Helmholtz-Zentrum Dresden-Rossendorf
National and Kapodistrian University of Athens

Research output: Contribution to journal › Conference article › peer-review

6 Scopus citations

Abstract

Ion emission instabilities have been investigated using simultaneously taken current oscillograms and frequency spectra, for Ga, AuGe and AuGeSi liquid metal ion sources (LMISs). The current fluctuation intensity depends nonlinearly on emission current: it displays an S-like shape and tends towards saturation at currents of 70-80 μA in the case of Ga. The saturation value of the mean fluctuation amplitude (rms) is ∼5 μA about the d.c. level for this source. For alloy sources the emitter temperature was varied between 400 and 1060 °C; the onset for the appearance of current fluctuations - indicative of electrohydrodynamic instabilities at the liquid anode - varied with temperature. Moreover, it was found that with increasing temperature a LMIS becomes increasingly unstable. The experimental results are supported by existing theory.

Original language	English
Pages (from-to)	120-125
Number of pages	6
Journal	Microelectronic Engineering
Volume	73-74
DOIs	https://doi.org/10.1016/j.mee.2004.02.027
State	Published - Jun 2004
Externally published	Yes
Event	Micro and Nano Engineering 2003 - Cambridge, United Kingdom Duration: 22 Sep 2003 → 25 Sep 2003

Keywords

Electrohydrodynamic instabilities
Field ion emission
Liquid metal ion sources

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10.1016/j.mee.2004.02.027

Cite this

@article{9fa0797396234c19b5d89643462e15dd,

title = "Investigation of emission instabilities of liquid metal ion sources",

abstract = "Ion emission instabilities have been investigated using simultaneously taken current oscillograms and frequency spectra, for Ga, AuGe and AuGeSi liquid metal ion sources (LMISs). The current fluctuation intensity depends nonlinearly on emission current: it displays an S-like shape and tends towards saturation at currents of 70-80 μA in the case of Ga. The saturation value of the mean fluctuation amplitude (rms) is ∼5 μA about the d.c. level for this source. For alloy sources the emitter temperature was varied between 400 and 1060 °C; the onset for the appearance of current fluctuations - indicative of electrohydrodynamic instabilities at the liquid anode - varied with temperature. Moreover, it was found that with increasing temperature a LMIS becomes increasingly unstable. The experimental results are supported by existing theory.",

keywords = "Electrohydrodynamic instabilities, Field ion emission, Liquid metal ion sources",

author = "Ch Akhmadaliev and L. Bischoff and Mair, \{G. L.R.\} and Aidinis, \{C. J.\} and Th Ganetsos",

year = "2004",

month = jun,

doi = "10.1016/j.mee.2004.02.027",

language = "English",

volume = "73-74",

pages = "120--125",

journal = "Microelectronic Engineering",

issn = "0167-9317",

publisher = "Elsevier B.V.",

note = "Micro and Nano Engineering 2003 ; Conference date: 22-09-2003 Through 25-09-2003",

}

TY - JOUR

T1 - Investigation of emission instabilities of liquid metal ion sources

AU - Akhmadaliev, Ch

AU - Bischoff, L.

AU - Mair, G. L.R.

AU - Aidinis, C. J.

AU - Ganetsos, Th

PY - 2004/6

Y1 - 2004/6

N2 - Ion emission instabilities have been investigated using simultaneously taken current oscillograms and frequency spectra, for Ga, AuGe and AuGeSi liquid metal ion sources (LMISs). The current fluctuation intensity depends nonlinearly on emission current: it displays an S-like shape and tends towards saturation at currents of 70-80 μA in the case of Ga. The saturation value of the mean fluctuation amplitude (rms) is ∼5 μA about the d.c. level for this source. For alloy sources the emitter temperature was varied between 400 and 1060 °C; the onset for the appearance of current fluctuations - indicative of electrohydrodynamic instabilities at the liquid anode - varied with temperature. Moreover, it was found that with increasing temperature a LMIS becomes increasingly unstable. The experimental results are supported by existing theory.

AB - Ion emission instabilities have been investigated using simultaneously taken current oscillograms and frequency spectra, for Ga, AuGe and AuGeSi liquid metal ion sources (LMISs). The current fluctuation intensity depends nonlinearly on emission current: it displays an S-like shape and tends towards saturation at currents of 70-80 μA in the case of Ga. The saturation value of the mean fluctuation amplitude (rms) is ∼5 μA about the d.c. level for this source. For alloy sources the emitter temperature was varied between 400 and 1060 °C; the onset for the appearance of current fluctuations - indicative of electrohydrodynamic instabilities at the liquid anode - varied with temperature. Moreover, it was found that with increasing temperature a LMIS becomes increasingly unstable. The experimental results are supported by existing theory.

KW - Electrohydrodynamic instabilities

KW - Field ion emission

KW - Liquid metal ion sources

UR - https://www.scopus.com/pages/publications/17344390914

U2 - 10.1016/j.mee.2004.02.027

DO - 10.1016/j.mee.2004.02.027

M3 - Conference article

AN - SCOPUS:17344390914

SN - 0167-9317

VL - 73-74

SP - 120

EP - 125

JO - Microelectronic Engineering

JF - Microelectronic Engineering

T2 - Micro and Nano Engineering 2003

Y2 - 22 September 2003 through 25 September 2003

ER -

Investigation of emission instabilities of liquid metal ion sources

Abstract

Keywords

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