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

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.

High Spin Polarization of Conduction Band Electrons in GaAs-GaAsP Strained Layer Superlattice Fabricated as a Spin-Polarized Electron Source

2004 ◽  
Vol 43 (6A) ◽  
pp. 3371-3375 ◽  
Author(s):  
Tetsuya Matsuyama ◽  
Hisaya Takikita ◽  
Hiromichi Horinaka ◽  
Kenji Wada ◽  
Tsutomu Nakanishi ◽  
...  
Keyword(s):  
Conduction Band ◽  
Spin Polarization ◽  
High Spin ◽  
Electron Source ◽  
Strained Layer ◽  
Spin Polarized ◽  
High Spin Polarization ◽  
Strained Layer Superlattice

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 Luminescence Polarization of InGaAs–AlGaAs Strained Layer Superlattice Fabricated as a Photocathode of Spin-Polarized Electron Source

2001 ◽  
Vol 40 (Part 1, No. 11) ◽  
pp. 6468-6472
Author(s):  
Tetsuya Matsuyama ◽  
Masayasu Mukai ◽  
Hiromichi Horinaka ◽  
Kenji Wada ◽  
Tsutomu Nakanishi ◽  
...  
Keyword(s):  
Electron Source ◽  
Strained Layer ◽  
Spin Polarized ◽  
Strained Layer Superlattice ◽  
Luminescence Polarization

scholarly journals New-Type Spin Polarized Electron Source and Its Applications.

Materia Japan ◽  
1998 ◽  
Vol 37 (8) ◽  
pp. 694-696
Author(s):  
Takashi Saka ◽  
Toshihiro Kato ◽  
Tsutomu Nakanishi ◽  
Shoji Okumi ◽  
Hiromichi Horinaka
Keyword(s):  
Electron Source ◽  
Spin Polarized ◽  
New Type
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