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