Electron Gun System: 1 eV to 2000 eV
Quick Overview
Constant beam current and spot size over wide energy range
Energy Range: 1 eV to 2000 eV
Beam Current: 1 nA to 10 µA
Spot Size: 0.5 mm to 5 mm
Mounting: 2¾CF, demountable option
Features/Options: Zoom Lens Focusing for Energy Sweeping, Deflection, Rastering, High Speed Pulsing
ELG-2 ELECTRON GUN SPECIFICATIONS：
BEAM ENERGY： 1 eV to 2 keV (Independently adjustable)
BEAM CURRENT ：Standard: 1 nA to 10 μA (Independently adjustable)
ENERGY SPREAD ：Approx. cathode thermal spread, calculated Ta – 0.5eV Y2O3 – 0.4eV BaO – 0.3eV
SPOT SIZE ：0.5 mm to 5 mm at 20 mm working distance (Independently adjustable)
WORKING DISTANCE： Range: 5 mm to 100 mm
20 mm recommended for very low energy operation
BEAM DEFLECTION ：4 pole electrostatic: ± 2.5° at 2000 eV; scales larger at lower energies
PULSE CAPABILITY(using appropriate pulse generator, not included)：Capacitive Pulse Junction Box: pulse width 20 ns to 100 μs , rise/ fall 10 ns, 50 Ω impedance, 1 W standard(higher power available)
Optional Dual Grid Power Supply: pulse width 2 μs to DC, rise/ fall 500 ns, rep rates to 5kHz (TTL required)
BEAM UNIFORMITY： Gaussian
FIRING UNIT： Customer-replaceable Firing Unit includes
precision-aligned cathode and Wehnelt (G-1) assembly and first anode, with insulators and connectors
CATHODE TYPES： Standard: Tantalum disc
Optional: Barium oxide (BaO) or Yttrium oxide (Y2O5)With the exception of Barium oxide, cathodes not harmed by repeated exposure to atmospheric gases while cold
MOUNTING： Flange Multiplexer with a 2¾ inch rotatable CF,including both tapped and clear mounting holes
Optional: Demountable (Unmounted / Mounted) with a Flange Multiplexer with a 2¾ inch rotatable CF
FARADAY CUP ：Gun mounted or stand-alone designs available
BEAM ALIGNMENT ：Optional: Mechanical alignment with ± 2° Port Aligner
INSERTION LENGTH Standard: 150 mm, Range: 110 mm to 170 mm.
Custom lengths available. Gun manufactured at standard length unless otherwise specified at time of order.
GUN DIAMETER ：25.4 mm at the gun flange, necks down to 19.1 mm at 100 mm from the flange
FEEDTHROUGHS ：Multi-pin brazed ceramic, threaded stainless steel shell
CABLES /CONNECTORS
Multiconductor high voltage fully ground-shielded cable,coaxial grid cable, low voltage deflection cable, with mating aluminum shell connectors, to connect gun and power supply. Standard lengths: 3 m Optional: 5 m
MAXIMUM BAKEOUT 350°C with cables removed (Faraday cup: removable pneumatic actuator 65°C max)
EGPS-1022 ELECTRON GUN POWER SUPPLY SPECIFICATIONS：
OUTPUT All ：necessary voltages to drive the ELG-2 Electron Gun
ENERGY STABILITY ：±0.01% per hour; ±0.02% per 8 hours at full output
BEAM STABILITY： ±0.1% per hour with Emission Current Control or ±10% per hour after warm up without ECC
CONTROLS ：FlexPanel controls: Energy, Source, Grid, First Anode,Focus, X and Y Deflection, Emission Current Control
METERING ：FlexPanel digital meters: Energy, Hi / Lo Range, Source Voltage, Source Current, Emission Current, Grid, First Anode, Focus, X and Y Deflection
COMPUTER/REMOTE CONTROL & METER
Power supplies: 0 to +10 V (-10 V to +10 V, deflection)
Metering: 0 to +2 V ( -2 V to +2 V, deflection)
Standard 50-pin connector for analog input/output and RS-232 serial port (RS-422 or RS-485 available, if specified at time of order)
Optional: SCSI metering and programming connectors
SOFTWARE ：Standard configuration designed for RS-232 connections.
Optional: National Instruments LabVIEWTM file, designed to run with computer DAQ boards NI PCI-6713 and PCIe-6341. SCSI connectors
INPUT： 115 VAC or 230 VAC, 50 to 60 Hz single phase, 250 VA
ENVIRONMENT ：Temperature: 0 to 40ºC, Relative humidity: 0 to 75% RH non condensing,
Classified as a pollution degree 2, installation category (overvoltage category) II environment unit
DIMENSIONS：(width x height x depth)
17 in. x 3.5 in. x 22 in. excluding handles
(425 mm x 90 mm x 560 mm); 19 in. rack mountable,added to main rack