Kimball Lanthanum Hexaboride Single Crystal Cathodes 六硼化镧单晶阴极

Kimball Lanthanum Hexaboride Single Crystal Cathodes 六硼化镧单晶阴极

Description

The Kimball Physics ES-423E (Extended Life) Lanthanum Hexaboride (LaB₆) Cathode is a high performance, resistively heated, thermionic electron source. It is currently employed in many brightness-limited electron optical systems: SEM’s, TEM’s, probes, electron lithography systems, and more. It is based on a well-proven heater structure, which has recently been further refined with features that include improved reliability of the heater circuit, improved stability of the LaB₆ crystal, and less exposure of LaB₆ to reduce Wehnelt aperture contamination. Lifetimes in excess of 6 months of continuous operation are regularly achieved in commercial SEM’s and TEM’s with suitable gun vacuum. Continuous operation at the full operating temperature improves the thermal stability of the gun and hence beam current stability.

Kimball Physics ES-423E（长寿命）六硼化镧（LaB6）阴极是一种高性能、电阻加热的热离子电子源。目前，它被用于许多亮度受限的电子光学系统：SEM、TEM、探针、电子光刻系统等。它基于一种经过充分验证的加热器结构，该结构最近被进一步改进，其特征包括提高加热器电路的可靠性、提高LaB6晶体的稳定性以及减少LaB6的暴露以减少Wehnelt孔径污染。在具有合适的枪真空的商业SEM和TEM中，连续操作的寿命通常超过6个月。在全操作温度下的连续操作提高了枪的热稳定性，从而提高了射束电流的稳定性。

Applications

• Scanning Electron Microscopes
• Transmission Electron Microscopes
• Electron Lithography Systems
• Electron Accelerators
• X-ray Sources
• Free Electron Lasers
• Custom Applications

应用

扫描电子显微镜

透射电子显微镜

电子光刻系统

电子加速器

X射线源

自由电子激光器

自定义应用程序

Features / Options:

• Extended Lifetime
  • Thousands of functional hours in
    clean vacuum
  • Guaranteed Against Structural
    Mounting Failure
• Exceptional Stability
  • Precision machined carbon mounting
  • High over-temperature tolerance
• High Brightness / Low Energy Spread
  • <100> Oriented Single Crystal
  • Best Quality / High Purity Material
  • Emission current densities up to 30 A/cm2
  • Operating pressure < 10-7 torr
• Accurate Microflats
  • Superior Optics
  • Controlled Source Size
  • Standard Diameters Available
  • Range of emission surface sizes
  • Custom sizes available
• On AEI base, compact CB-104 base or request custom mounting

功能/选项：

延长使用寿命

在清洁真空中可以工作数千个工作小时

保证不会出现结构安装故障

卓越的稳定性

精密加工碳支座

高温耐受性

高亮度/低能量扩散

<100>定向单晶

最佳质量/高纯度材料

发射电流密度高达30 A/cm2

工作压力<10-7托

精确的微平台

卓越的光学性能

受控源大小

提供标准直径

发射表面尺寸范围

提供定制尺寸

在AEI底座上，紧凑型CB-104底座或要求定制安装