Kimball Lanthanum Hexaboride Single Crystal Cathodes 六硼化鑭單晶陰極

Kimball Lanthanum Hexaboride Single Crystal Cathodes 六硼化鑭單晶陰極

 

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（長壽命）六硼化鑭（LaB6）陰極是一種高性能、電阻加熱的熱離子電子源。目前，它被用于許多亮度受限的電子光學(xué)系統(tǒng)：SEM、TEM、探針、電子光刻系統(tǒng)等。它基于一種經(jīng)過充分驗(yàn)證的加熱器結(jié)構(gòu)，該結(jié)構(gòu)最近被進(jìn)一步改進(jìn)，其特征包括提高加熱器電路的可靠性、提高LaB6晶體的穩(wěn)定性以及減少LaB6的暴露以減少Wehnelt孔徑污染。在具有合適的槍真空的商業(yè)SEM和TEM中，連續(xù)操作的壽命通常超過6個月。在全操作溫度下的連續(xù)操作提高了槍的熱穩(wěn)定性，從而提高了射束電流的穩(wěn)定性。

Applications

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

應(yīng)用

掃描電子顯微鏡

透射電子顯微鏡

電子光刻系統(tǒng)

電子加速器

X射線源

自由電子激光器

自定義應(yīng)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/選項：

延長使用壽命

在清潔真空中可以工作數(shù)千個工作小時

保證不會出現(xiàn)結(jié)構(gòu)安裝故障

卓越的穩(wěn)定性

精密加工碳支座

高溫耐受性

高亮度/低能量擴(kuò)散

<100>定向單晶

最佳質(zhì)量/高純度材料

發(fā)射電流密度高達(dá)30 A/cm2

工作壓力<10-7托

精確的微平臺

卓越的光學(xué)性能

受控源大小

提供標(biāo)準(zhǔn)直徑

發(fā)射表面尺寸范圍

提供定制尺寸

在AEI底座上，緊湊型CB-104底座或要求定制安裝

 

 


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