LaB6single‐crystal tips as an electron source of high brightness

1975 ◽  
Vol 27 (3) ◽  
pp. 113-114 ◽  
Author(s):  
R. Shimizu ◽  
Y. Kataoka ◽  
S. Kawai ◽  
T. Tanaka
Keyword(s):  
Electron Source ◽  
High Brightness

Optical Properties of HVEM Accelerators

1975 ◽  
Vol 33 ◽  
pp. 180-181
Author(s):  
A. Strojnik ◽  
J.W. Scholl ◽  
V. Bevc
Keyword(s):  
Optical Properties ◽  
Electron Accelerator ◽  
Systematic Investigation ◽  
Electron Source ◽  
High Brightness ◽  
The Past ◽  
Wide Range ◽  
Optical Behavior

The electron accelerator, as inserted between the electron source (injector) and the imaging column of the HVEM, is usually a strong lens and should be optimized in order to ensure high brightness over a wide range of accelerating voltages and illuminating conditions. This is especially true in the case of the STEM where the brightness directly determines the highest resolution attainable. In the past, the optical behavior of accelerators was usually determined for a particular configuration. During the development of the accelerator for the Arizona 1 MEV STEM, systematic investigation was made of the major optical properties for a variety of electrode configurations, number of stages N, accelerating voltages, 1 and 10 MEV, and a range of injection voltages ϕ0 = 1, 3, 10, 30, 100, 300 kV).

A comparative study on the cold type and thermal type field emission guns used in the same electron microscope

1978 ◽  
Vol 36 (1) ◽  
pp. 58-59
Author(s):  
M. Iwatsuki ◽  
Y. Kokubo ◽  
Y. Harada
Keyword(s):  
Electron Microscope ◽  
Field Emission ◽  
Signal To Noise Ratio ◽  
Electron Source ◽  
Resolving Power ◽  
Optical Source ◽  
Experimental Conditions ◽  
High Brightness ◽  
Illumination System ◽  
Transmission Electron

On accout of its high brightness, small optical source size, and minimal energy spread, the field emission gun (FEG) has the advantage that it provides the conventional transmission electron microscope (TEM) with a highly coherent illumination system and directly improves the resolving power and signal-to-noise ratio of the scanning electron microscope (SEM). The FEG is generally classified into two types; the cold field emission (C-FEG) and thermal field emission gun (T-FEG). The former, in which a field emitter is used at the room temperature, was successfully developed as an electron source for the SEM. The latter, in which the emitter is heated to the temperature range of 1000-1800°K, was also proved to be very suited as an electron source for the TEM, as well as for the SEM. Some characteristics of the two types of the FEG have been studied and reported by many authors. However, the results of the respective types have been obtained separately under different experimental conditions.

WO3 nanowire field emission point electron source with high brightness and current stability

Vacuum ◽  
2021 ◽  
pp. 110660
Author(s):  
Zufang Lin ◽  
Huanjun Chen ◽  
Juncong She ◽  
Shaozhi Deng ◽  
Jun Chen
Keyword(s):  
Field Emission ◽  
Electron Source ◽  
High Brightness ◽  
Emission Point

Laser Focusing System for High Brightness Polarized Electron Source for SPLEEM

2007 ◽  
Author(s):  
A. Mano ◽  
N. Yamamoto ◽  
K. Tamagaki ◽  
S. Okumi ◽  
M. Yamamoto ◽  
...  
Keyword(s):  
Electron Source ◽  
High Brightness ◽  
Laser Focusing

High-Brightness Spin-Polarized Electron Source Using Semiconductor Photocathodes

2009 ◽  
Vol 48 (6) ◽  
pp. 06FF02 ◽  
Author(s):  
Tomohiro Nishitani ◽  
Masao Tabuchi ◽  
Yoshikazu Takeda ◽  
Yuji Suzuki ◽  
Kazuya Motoki ◽  
...  
Keyword(s):  
Electron Source ◽  
High Brightness ◽  
Spin Polarized

High-brightness electron source isolated from the ambient atmosphere

Vacuum ◽  
1999 ◽  
Vol 55 (1) ◽  
pp. 7-11 ◽  
Author(s):  
L.I. Antonova ◽  
V.P. Denissov
Keyword(s):  
Electron Source ◽  
Ambient Atmosphere ◽  
High Brightness

scholarly journals A high-brightness large-diameter graphene coated point cathode field emission electron source

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
Xiuyuan Shao ◽  
Avinash Srinivasan ◽  
Wei Kean Ang ◽  
Anjam Khursheed
Keyword(s):  
Field Emission ◽  
Large Diameter ◽  
Electron Source ◽  
High Brightness ◽  
Emission Electron

High Brightness and high polarization electron source using transmission photocathode

2009 ◽  
Author(s):  
Naoto Yamamoto ◽  
Xiuguang Jin ◽  
Atsushi Mano ◽  
Yasuhide Nakagawa ◽  
Tsutomu Nakanishi ◽  
...  
Keyword(s):  
Electron Source ◽  
High Brightness ◽  
High Polarization
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