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LaB6 Lanthanum Hexaboride Filaments

LaB6 Lanthanum Hexaboride Filaments

Kimball Physics single crystal lanthanum hexaboride (LaB₆) cathodes are available for most makes of electron microscopes and other electron beam instruments.

All prices exclude VAT.

Description Tech Data

Name & Code

Grouped product items
Code & Description	Availability	Price	Qty
AGA0692-9015 LaB6 Filament 90/15 on AEI Base for Camscan, Cameca, Electroscan, Cambridge Instruments, LEO/Leica/Zeiss Loading...	Loading...	POA	POA
AGA0692-9020 LaB6 Filament 90/20 on AEI Base for Camscan, Cameca, Electroscan, Cambridge Instruments, LEO/Leica/Zeiss Loading...	Loading...	POA	POA
AGA0692-6006 LaB6 Filament 60/06 on AEI Base for Camscan, Cameca, Electroscan, Cambridge Instruments, LEO/Leica/Zeiss Loading...	Loading...	POA	POA
AGA0690-9015 LaB6 Filament 90/15 on FEI/Philips Base (not XL30) Loading...	Loading...	POA	POA
AGA0690-9020 LaB6 Filament 90/20 on FEI/Philips Base (not XL30) Loading...	Loading...	POA	POA
AGA0690-6006 LaB6 Filament 60/06 on FEI/Philips Base (not XL30) Loading...	Loading...	POA	POA
AGA0691-9020 LaB6 Filament 90/20 on FEI XL30 Base Loading...	Loading...	POA	POA
AGA0693-9015 LaB6 Filament 90/15 on JEOL K Base Loading...	Loading...	POA	POA
AGA0693-9020 LaB6 Filament 90/20 on JEOL K Base Loading...	Loading...	POA	POA
AGA0693-6006 LaB6 Filament 60/06 for JEOL K Base Loading...	Loading...	POA	POA
AGA0694-9015 LaB6 Filament 90/15 on Zeiss Base (please specify make & model) Loading...	Loading...	POA	POA
AGA0694-9020 LaB6 Filament 90/20 on Zeiss Base (please specify make & model) Loading...	Loading...	POA	POA
AGA0694-6006 LaB6 Filament 60/06 on Zeiss Base (please specify make & model) Loading...	Loading...	POA	POA
AGA0695-9015 LaB6 Filament 90/15 on ISI/ABT/Topcon two pin Base Loading...	Loading...	POA	POA
AGA0695-9020 LaB6 Filament 90/20 on ISI/ABT/Topcon two pin Base Loading...	Loading...	POA	POA
AGA0695-6006 LaB6 Filament 60/06 on ISI/ABT/Topcon two pin Base Loading...	Loading...	POA	POA
AGA0698-9015 LaB6 Filament 90/15 on Hitachi S Base Loading...	Loading...	POA	POA
AGA0698-9020 LaB6 Filament 90/20 on Hitachi S Base Loading...	Loading...	POA	POA
AGA0698-6006 LaB6 Filament 60/06 on Hitachi S Base Loading...	Loading...	POA	POA

Product Description

High current, high brightness, single crystal
Emission current densities up to 30A/cm²
Range of emission surface sizes
Long lifetimes
Operating pressure <10^-7 torr

Kimball Physics single crystal lanthanum hexaboride (LaB₆) cathodes are available for most makes of electron microscopes and other electron beam instruments where a suitable gun vacuum in the region of 10^-7 Torr is attainable. The filament heater can then be driven by the normal power supply of the microscope.

Brightness above 1 x 10⁶ Amp/cm² steradian is achievable.

For SEM applications, the higher brightness provides better imaging resolution and improved efficiency for microanalysis. For TEM, the low energy spread of the LaB₆ filament is particularly advantageous for high resolution imaging. Alternatively, LaB₆ filaments may be used where a long filament life is important; lifetimes in excess of six months continuous operation are regularly achieved.

Technical Data

ES423E series with 90° cone and 15µm microflat
The ES423E style 90/15 cathode is the standard LaB₆ crystal filament, ground with a 90° cone, terminated with a truncation of 15µm diameter. This is the standard style of filament recommended for long life, stability and uniformity.

ES423E series with 90° cone and 20µm microflat
The ES423E style 90/20 series of LaB₆ filaments are designed to be used in scanning electron microscopes that normally operate with a high emission current in the range of 60 - 100µA. The 90° cone is terminated with a 20µm diameter microflat. A long lifetime of this filament can be achieved providing a good gun vacuum is maintained.

ES423E series with 60° cone and 6µm microflat
The ES423E style 60/06 filament has the tip of an ES423E LaB₆ crystal ground with a 60° cone, terminated with a polished truncation of 6µm diameter. This type of filament can provide a higher brightness than filaments with larger truncations. The main application of this style of filament is in high resolution TEM, where the total beam current is frequently restricted to minimise electron energy spread. With this filament, adequate axial brightness is attainable at very low emission currents. As a consequence of achieving the higher brightness, the effective lifetime of this filament is found to be slightly less than a conventional 90-15 style filament.

Stock Code	Compatibility	Notes
AGA0692	Cambridge/LEO/Zeiss (EVO) & AEI. Camscan, Cameca, Electroscan	Not compatible with Cambridge S4-10
AGA0690	FEI/Philips & AmRay/AMR	Not compatible with AmRay/AMR 1200 series
AGA0691	FEI XL30
AGA0693	Jeol K-type with metal ring
AGA0694	Zeiss DSM/TEM, LEO TEM & LEO1450	Not compatible with Zeiss EVO
AGA0695	ISI/ABT/Topcon/Coxem/Pemtron Bent Pin
AGA0698	Hitachi H/S/X Series
Please email [email protected] for any compatibility enquiries.

LaB6 Cathode Technical Datasheet LaB6 Cathode Technical Datasheet

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