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. 2008 Apr 18;15(Pt 3):258–261. doi: 10.1107/S0909049507066769

Table 1. Main specifications of the electron gun.

Component Specifications
Extraction voltage 60 kV
Maximum current >100 mA
Grid type Aperture grid
Cathode emission Thermionic
Cathode material LaB6 or CeB6
Cathode diameter 2.0 mm
Cathode-grid voltage 5.0 kV (DC)/3.5 kV (pulse)
Beam size at anticathode <1.0 mm × 0.1 mm
Normalized emittance A few π mm mrad