EGH-8105 / EGPS-8105
ELECTRON GUN / POWER SUPPLY

1 keV to 100 keV
FOCUSABLE FLOOD HIGH-ENERGY ELECTRON BEAMSFOR USE IN:GENERAL VACUUM PHYSICSSPACECRAFT MATERIALS TESTINGUHV CHARGINGSURFACE PHYSICSFEATURES / OPTIONS:UNIFORM FLOOD BEAM
BEAM WASHING FOR UNIFORM SPOTELECTROSTATIC FOCUSINGTWO X 1.33” INSTRUMENTATION PORTS
INTERNAL ALIGNMENT WHILE OPERATING
USER-REPLACEABLE FIRING UNITS
6 INCH CFF MOUNTINGUHV TECHNOLOGY / BAKEABLECOMPUTER / REMOTE CONTROLLABVIEWTM COMPUTER / PROGRAMMING
EGH-8105 Electron Gun System components
The Kimball Physics EGH-8105 Electron Gun with its matching
EGPS-8105 Power Supply is a complete subsystem ready to attach tothe user's vacuum system and turn on. It can deliver electrons over abroad range of energies, currents and power. The EGH-8105 is a highpower, focusable flood gun for use in spacecraft materials testing andother surface physics and general vacuum physics applications.
This is a high energy, focusable, flood electron beam system whereboth beam energy and beam current are independently adjustable overwide ranges. Energies from 1 keV to 100 keV and currents frompicoamps to tens of milliamps can be achieved. The electron beam
can be pulsed by an input signal to the control grid.
The adjustable optics of the gun can adapt to different divergences anddifferent working distances. A magnetic beam washing (“wobbling”)
option is available which provides significant improvement in beam
uniformity. An electrostatic focusing lens provides control of the spot
size, which is typically in the tens of centimeters. However as aflood-style gun, the spot size is also partially dependent on the grid,
anode and working distance.
The gun features an adjustable cathode feedthrough assembly thatallows the mechanical alignment of the firing unit with respect to theanode and the column. This alignment can be done in real time while
the gun is operating at full voltage with the beam on. The firing unit
cartridge (including the cathode, cathode-mount, and Wehneltaperture) is user-replaceable without the need to remove the gun fromthe vacuum chamber. Used firing units may be returned to the factoryfor rebuild.

Several cathode types and sizes are available: tantalum (Ta) disccathodes, yttria-coated (Y2O3) iridium cathodes, or Barium Oxide(BaO) cathodes. These cathodes (with the exception of BaO) are notdamaged by repeated exposure to atmospheric gases or water vapor
when cold.
UHV technology is used throughout. The gun can be run in vacuums
from 10-11 torr to 10-6 torr for the Ta and Y2O3 cathodes, or to 10-7 torr
for BaO cathode. The yttria-coated iridium cathode can survive a total
vacuum dump. The electron gun is bakeable to 200oC with cables
removed. The gun is usually mounted on a 6 inch CF flange, and it has
zero insertion distance into the vacuum chamber.
The EGPS-8105 Power Supply contains all necessary power supplies
to run the EGH-8105 Electron Gun. The Power Supply System design
includes a seperate H.V. Supply.
An optional LabVIEWTM computer program designed for theEGH-8105 is available for remote computer control and metering.
Software is available in two types: Using National Instrument DAQ
boards and SCSI connectors on the EGPS-8105, or via a simple serial
connector interface. The program provides a virtual panel of controls
and real-time metering on the user’s computer screen.
A typical lab set-up of a complete
Kimball Physics high energy
system with electron gun, power
supplies and optional computer
control system (details vary withgun model)

EGH-8105 ELECTRON GUN(Dimensions in mm)
Toll Free: 1 888 KIM-PHYS (1 888 546-7497) e-mail: info@kimphys.com
Tel. 1 603 878-1616 Fax: 1 603 878-3700

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EGH-8105 ELECTRON GUN SPECIFICATIONSBEAM ENERGYBEAM CURRENTENERGY SPREAD
BEAM FOCUSING
BEAM DIVERGENCE
SPOT SIZE
WORKING DISTANCE
BEAM DEFLECTION
BEAM WASHING
PULSE CAPABILITY

EGPS-8105 ELECTRON GUN POWER SUPPLY SPECIFICATIONS

1 keV to 100 keV (Independently adjustable)
50 nA to 100 μA (Independently adjustable)
High Current option: 10nA to 5 mA
Low Current option: 100pA to 100nA

OUTPUT

Approx. 0.4 eV cathode thermal spread, calculated
Magnetostatic (Quadrupole)
Optional: Magnetostatic beam shaping
Variable. Adjustable optics to adapt to different
divergences and different working distances
Variable
Variable
Magnetostatic: ± 20° at 100 keV

BEAM STABILITY±1.0% per hour with Emission Current Control or±10% per hour after warm up without ECC

CONTROLS

Energy, Focus, Anode, Grid, Source, Emission Current
Control, optional Raster X and Y Size and Frequency

ENERGY SUPPLYSTABILITYBEAM ALIGNMENT

Magnetic: Improves beam uniformity (optional)
Pulsing with grid remote control
Optional Dual Grid Power Supply: pulse width 2 μs toDC, rise/ fall 500 ns, rep rates to 5 kHzwith optional LabVIEWTM program pulse generator
Gaussian
Customer-replaceable Firing Unit Cartridge includes
precision-aligned cathode, and Wehnelt (G-1) assemblyFiring unit also includes first anodeStandard: Refractory metal cathode - Ta
Low-light barium oxide coated (BaO)
Yttria coated iridium (Y2O3)
Mechanical alignment with internal firing unit adjustment

MOUNTING

Standard: 6 inch CF flange

INSERTION LENGTH

Zero mm

GUN DIMENSIONS(outside vacuum)

Gun length: 537 mm sealing surface to end of cableconnector, Gun diameter: 203 mm
Multi-pin brazed ceramic with threaded stainless steel
shell

BEAM UNIFORMITYFIRING UNITCATHODE TYPESFEEDTHROUGHSCABLESMAXIMUM BAKEOUT

All necessary voltages to drive the EGH-8105 ElectronGun.
<0.01% per hour with 0.05% rms ripple at full output

METERING

Digital: Energy, Focus Anode, Emission, Grid, SourceVolts, Source Amps, optional Raster X Size and Y SizeCOMPUTER/REMOTE All power supplies: 0 to +10 volts or -10 to +10 volts
CONTROL & METER All meters: 0 to +2 volts
INPUT
115 VAC or 230 VAC, 50 to 60 Hz, 100 W
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 unitSOFTWARE

Optional: National Instruments LabVIEWTM file, designed
to run with computer DAQ boards NI 6713 / 6036.
Standard configuration designed for RS-232
connections.
SCSI optional

DIMENSIONS
Two units, (EGPS control unit and HV unit) total approx:(width x height x depth) 17 in. x 12 in. x 22 in. excluding handles (432 mm x 305mm x 560 mm); 19 in. rack mountable

OPTIONAL RASTERING / BEAM WASHING SPECIFICATIONS

Multiconductor high voltage fully ground-shielded Source
cable, low voltage deflection cable
200°C with cables removed

Frequency in X and Y directions can be independently
RASTER GENERATOR set. X freq. is up to 500 Hz, Y freq. 100Hz. When X freq.
exceeds 100Hz the raster angle is reduced by 25%.
All parameters controllable via RS-232, RS-422, RS485, analog input, or computer control with LabVIEWTM
software option.
DIMENSIONS
Included in dimensions for standard EGPS (above)

Typical performance;data for guidance only.

Copyright © 2010 by Kimball Physics, Inc. 06/22/10 It is not necessarily possible to achieve all maximum specifications
simultaneously. Specifications Subject to Change Without Notice.