Compact Electron Gun for High-Voltage Electron Cooling Systems

It is well known that the combination of a field emission gun (FEG) and a conventional transmission electron microscope (CTEM) is extremely important for nanometer area analysis in analytical electron microscopy. However, the smaller illumination angle and reduced energy spread of FEG than those of a conventional electron gun (W hair pin filament or LaB6) give a slowly damping envelop function in phase contrast transfer function (PCTF). Thus the FEG ensures application not only to analytical microscopy but also to high resolution electron microscopy to improve the information limit.In a high voltage electron microscope (above 200 kV), high-speed vacuum pumps have to be provided below the acceleration tube to get an ultra high vacuum (UHV) around the field emission tip located at the top of the acceleration tube. However, this method is not always the best way to provide UHV because of the poor vacuum conductance caused by the electrodes inside the acceleration tube.

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Features of cooling dynamics in a high-voltage electron cooling system of the COSY

Technical Physics ◽

10.1134/s1063784215080046 ◽

2015 ◽

Vol 60 (8) ◽

pp. 1227-1233 ◽

Cited By ~ 1

Author(s):

M. I. Bryzgunov ◽

V. S. Kamerdzhiev ◽

V. V. Parkhomchuk ◽

V. B. Reva

Keyword(s):

High Voltage ◽

Cooling System ◽

Electron Cooling ◽

Voltage Electron ◽

High Voltage Electron

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Design of a high voltage electron gun for lithography applications

Journal of Vacuum Science & Technology B Microelectronics Processing and Phenomena ◽

10.1116/1.588022 ◽

1995 ◽

Vol 13 (6) ◽

pp. 2464

Author(s):

Paul F. Petric

Keyword(s):

High Voltage ◽

Electron Gun ◽

Voltage Electron ◽

High Voltage Electron

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Electron Collector for a High-Voltage Electron-Cooling System

Physics of Particles and Nuclei Letters ◽

10.1134/s1547477120040147 ◽

2020 ◽

Vol 17 (4) ◽

pp. 429-433

Author(s):

M. I. Bryzgunov ◽

A. V. Bubley ◽

A. P. Denisov ◽

V. V. Parkhomchuk ◽

V. M. Panasyuk ◽

...

Keyword(s):

High Voltage ◽

Cooling System ◽

Electron Cooling ◽

Voltage Electron ◽

High Voltage Electron

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A double-acceleration high-voltage electron gun of novel design

Journal of Scientific Instruments ◽

10.1088/0950-7671/18/1/304 ◽

1941 ◽

Vol 18 (1) ◽

pp. 8-9

Author(s):

H Moss

Keyword(s):

High Voltage ◽

Electron Gun ◽

Voltage Electron ◽

High Voltage Electron ◽

Novel Design

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High voltage electron cooling in ion colliders

10.22323/1.282.0059 ◽

2017 ◽

Author(s):

Maxim Bryzgunov ◽

Vasily Parkhomchuk ◽

Vladimir Reva

Keyword(s):

High Voltage ◽

Electron Cooling ◽

Voltage Electron ◽

High Voltage Electron

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Aberrations of Accelerating Tube for High-Voltage Electron Microscope

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100179725 ◽

1990 ◽

Vol 48 (1) ◽

pp. 194-195

Author(s):

Toshimi Ohye ◽

Yoshiki Uchikawa ◽

Chiaki Morita ◽

Hiroshi Shimoyama

Keyword(s):

Electron Microscope ◽

High Voltage ◽

Spherical Aberration ◽

Initial Energy ◽

Electron Gun ◽

Voltage Electron ◽

High Voltage Electron Microscope ◽

High Voltage Electron ◽

Inner Diameter ◽

Paraxial Ray

The accelerating tube (AT) which accelerates electrons up to a desired energy also functions as an electrostatic lens, In the present paper, numerical calculations were conducted on the electron optical characteristics including the spherical aberration of the AT for the high voltage electron microscope. Several electron optical problems arising from a combination of the AT with a thermionic electron gun (TEG) or a field emission gun (FEG) were studied.<Estimation of aberration for AT lens> The AT consists of 34 electrodes with the inner diameter of 3.3 cm and has the overall length of 142.3 cm (Fig.l). The voltage Va is applied between the cathode and the final electrode of the AT. The initial energy of the electron incident to the AT is eVo, where Vo is the anode voltage of the electron gun mounted on the AT. The electric field inside the AT was calculated using the surface charge method. The ray tracing was carried out on the basis of the relativistic paraxial ray equation, and the cardinal elements of the AT lens were obtained.

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