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A cathode material of a low work function is needed to achieve a high performance electron source. We measured the work function of W(100) surface modified with Y2O3 by using of photoemission electron microscope. The work function of Y-oxide/W(100) surface is measured to be 2.5eV. Field emission characteristics is measured with Y-oxide/W emitter and work function is estimated by N-F plots.
A cathode material of a low work function is needed to achieve a high performance electron source. We measured the work function of W(100) surface modified with HfO2 by using of photoemission electron microscope. The work function of Hf-oxide/W(100) surface is measured to be 2.9eV.
A cathode material of a low work function is needed to achieve a high performance electron source. We measured the work function of W(100) surface modified with Er2O3 by using of photoemission electron microscope. The work function of Er-oxide/W(100) surface is measured to be 2.65eV.
A cathode material of a low work function is needed to achieve a high performance electron source. We measured the work function of W(100) surface modified with CeO2 by using of photoemission electron microscope. The work function of Er-oxide/W(100) surface is measured to be 2.45eV.
A cathode material of a low work function is needed to achieve a high performance electron source. We measured the work function of W(100) surface modified with Sc2O3 by using of photoemission electron microscope. The work function of Sc-oxide/W(100) surface is measured to be 2.5eV.
A cathode material of a low work function is needed to achieve a high performance electron source. We measured the work function of W(100) surface modified with Nd2O3 by using of photoemission electron microscope. The work function of Nd-oxide/W(100) surface is measured to be 2.5eV.
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