High-efficient photocathode for high-brightness electron s ource and the coherence

用于高亮度电子源和相干性的高效光电阴极

• 批准号: 22740157
• 负责人: KUWAHARA Makoto
• 金额: $ 2.66万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22740157/
• 关键词: 加速器; 半導体光物性; 量子スピン; 量子デバイス

We have achieved a highly quantum efficiency(QE) and a robustness using a wide-band-gap semiconductor. A QE of InGaN-GaN superlattice is about 1. 5% in a wavelength of 300 nm, which is tenfold higher than an ordinal photocathode such as GaAs-GaAsP superlattice. Moreover, we have also realized a high durability against residual molecules in a vacuum using the wide-band-gap semiconductor photocathode.

我们已经实现了高量子效率（QE）和鲁棒性使用宽带隙半导体。InGaN-GaN超晶格的QE约为1。在300 nm的波长中达到5%，这比GaAs-GaAsP超晶格等有序光电阴极高10倍。此外，我们还利用宽带隙半导体光电阴极实现了对真空中残余分子的高耐用性。

项目成果

Development of spin-polarized transmission electron microscope

• DOI: 10.1088/1742-6596/298/1/012016
• 发表时间: 2011-05
• 期刊: Journal of Physics: Conference Series
• 作者: M. Kuwahara;Y. Takeda;K. Saitoh;T. Ujihara;H. Asano;T. Nakanishi;N. Tanaka

Development of spin-polarized and pulsed TEM

自旋极化和脉冲 TEM 的发展

• 发表时间: 2012
• 期刊: Journal of Physics : Conference Series
• 作者: M Kuwahara;F. Ichihashi;S. Kusunoki;Y. Takeda;K. Saitoh;T. Ujihara;H. Asano;T. Nakanishi;N. Tanaka
• 通讯作者: N. Tanaka

Dark-lifetime degradation of GaAs photo-cathode at higher temperature

• DOI: 10.1016/j.nima.2010.02.029
• 发表时间: 2011-05
• 期刊: Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
• 影响因子: 1.4
• 作者: M. Kuriki;C. Shonaka;H. Iijima;D. Kubo;H. Okamoto;H. Higaki;Katsuhide Ito;M. Yamamoto;T. Konomi;S. Okumi;M. Kuwahara;T. Nakanishi

スピン偏極パルスTEM用電子源の特性評価

自旋极化脉冲TEM电子源特性评估

• 发表时间: 2010
• 作者: 桒原真人;中西彊;田中信夫;竹田美和 浅野秀文;斎藤晃;宇治原徹
• 通讯作者: 宇治原徹

Mean Transverse Energy Measurement of Negative Electron Affinity GaAs-Based Photocathode

• DOI: 10.1143/jjap.51.046402
• 发表时间: 2012-03
• 期刊: Japanese Journal of Applied Physics
• 影响因子: 1.5
• 作者: S. Matsuba;Y. Honda;X. Jin;T. Miyajima;M. Yamamoto;T. Uchiyama;M. Kuwahara;Y. Takeda