EMG-4215 / EGPS-4215
ELECTRON GUN / POWER SUPPLY

1 keV to 30 keVMedium energy electron beam, High current density
FOR USE IN:
MBE RHEED STUDIESELECTRON DIFFRACTIONSPACE PHYSICS STUDIESGAS ELECTRON FLUORESCENCE
X-RAY GENERATIONHEATING / MELTING / WELDINGVACUUM PHYSICS EXPERIMENTS

FEATURES / OPTIONS:NEW MODULAR DESIGNINTERNAL ALIGNMENT WHILE OPERATINGCOLLIMATED BEAM
SPOT SIZE DOWN TO 500 μm
MEDIUM BEAM CURRENTS uP TO 5 mA
ELECTROSTATIC FOCUSING & DEFLECTIONUHV COMPATIBLE / BAKEABLECOMPUTER / REMOTE CONTROLUSER-REPLACEABLE FIRING UNITSThe Kimball Physics EMG-4215 Electron Gun, with its matching
EGPS-4215 Power Supply, is a multi-purpose modular Electron Gun
with applications in many areas. The EMG-4215/ EGPS-4215 is acomplete subsystem ready to attach to a user's vacuum system andturn on. The gun has the capability of producing a collimated, small
spot or flood electron beam.
Beam current, beam divergence, and beam energy are all adjustable
over wide ranges. The energy can be varied from 1 keV to 30 keV.
With the lanthanum hexaboride cathode, the beam current is
independently adjustable from 1 nA to 5 mA. The gun can deliver spots
down to 500 μm. Rastering is also available as an option.
The modular design of the EMG-4215 allows either the firing unit
assembly or the lens assembly to be replaced. The firing unit cartridge(including the cathode, cathode-mount, and Wehnelt aperture) is userreplaceable without removing the entire gun from the vacuum chamber.
The anode is also replaceable. The cathode to anode spacing isinternally adjustable to vary perveance.
The gun features an adjustable cathode feedthrough assembly thatallows the mechanical alignment of the firing unit with respect to theEMG-4215A Electron Gun with 4½ inch CF mounting flange

anode and the column. This alignment can be done in real time while
the gun is operating at full voltage with beam on.
UHV technology is used throughout. The gun can be run in vacuums
from 10-11 torr up to 10-7 torr for the standard LaB6 cathode. The
electron gun is bakable to 350°C with cables removed.
Firing unit cartridges are user-replaceable, and used cartridges may bereturned to the factory for rebuild. The electron gun itself may also besent back to the factory for complete disassembly, cleaning, and rebuildof the firing unit assembly (including installation of a new cathode).
The EGPS-4215 Power Supply features a modular design withminiaturized power supply clusters, optically isolated signals, and thenew FlexPanel digital interface controller. The included power supplies
are Beam Energy, Focus, X,Y Deflection and the floating Source/ECC
and Grid supplies. The system includes a separate High Voltage
Power Supply connected to and controlled by the EGPS-4215. Arastering option can be provided by an additional separate power
supply unit, the Raster Generator Deflection Unit (RGDU).
The new FlexPanel provides a digital display screen and a keypadcontroller for programming control on the front panel. Rear panel
connectors allow remote /computer control and metering of all gun
power supplies. An RS-232 serial port and an analog input/output
connector are included on standard power supply units. All common
computer interface bus types can be accommodated, by use ofappropriate digital to analog converters. RS-422/485 conversion ispossible.
An optional LabVIEWTM computer program designed for theEMG-4215 is available for remote computer control and metering using
National Instrument DAQ boards and SCSI connectors on theEGPS-4215. The program provides a virtual panel of controls andmeters on the user’s computer screen.

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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EMG-4215 ELECTRON GUN SPECIFICATIONS

EGPS-4215 ELECTRON GUN POWER SUPPLY SPECIFICATIONSBEAM ENERGY

1 keV to 30 keV (Independently adjustable)

OUTPUTSBEAM CURRENTENERGY SPREAD
BEAM DIVERGENCE
SPOT SIZE
WORKING DISTANCE
BEAM DEFLECTION

1 nA to 5 mAApprox. 0.4 eV cathode thermal spread, calculated
Collimated beam
500 μm to 25 mm
Typical: 150 mm. Range: 100 mm to 1000 mm
4 Pole Electrostatic: ± 2° at 30 keV; scales larger atlower energies
Optional Dual Grid Power Supply: pulse width 2 μs toDC, rise/ fall 500 ns, rep rates to 5 kHz (TTL required)
Note: with High Current option, Grid may not cut off
beam at higher energies
GaussianCustomer-replaceable Firing Unit Cartridge includes
precision-aligned cathode and Wehnelt (G-1) assemblyStandard: Lanthanum Hexaboride
Adjustable Feedthrough for mechanical alignment offiring unit while gun is operating
Flange Multiplexer with a 4½ inch CFF, including both
tapped and clear mounting holes
Standard: 51 mm
Gun length in vacuum: 51 mm sealing surface to end,
51 mm dia. Outside vacuum: 295.5 mm sealing surface
to end of cableMultipin brazed ceramic, threaded stainless steel shell
Multiconductor 30 kV high voltage fully ground-shieldedcable, 20 kV focus cable, and low voltage deflection
cable, with mating aluminum connectors, to connect gun
and power supply. Standard lengths: 3 m, Optional: 5 m
350°C with cables removed

PULSE CAPABILITY(using appropriatepulse generator,not included)
BEAM UNIFORMITYFIRING UNITCATHODE TYPESINTERNAL GUN
ALIGNMENTMOUNTING
INSERTION LENGTHGUN DIMENSIONSFEEDTHROUGHSCABLES /CONNECTORSMAXIMUM BAKEOUT

ENERGY SUPPLYSTABILITYBEAM STABILITY

All necessary voltages to drive the EMG-4215 Electron
Gun (in combination with H.V. Power Supply)<0.01% per hour with 0.05% rms ripple at full output±0.1% per hour with Emission Current Control or±10% per hour after warm up without ECC
CONTROLS
FlexPanel controls: Energy, Source, Grid, Focus,
X and Y Deflection, Emission Current Control,
METERING
FlexPanel digital meters: Energy, Source Voltage,
Source Current, Emission Current, Grid, Focus, X and Y
Deflection
Power supplies: 0 to +10 V (-10 V to +10 V, deflection)
COMPUTER/REMOTE Metering: 0 to +2 V ( -2 V to +2 V, deflection)
CONTROL & METER On/off switches: 0 or +5 V
Standard 50-pin connector for analog input/output andRS-232 serial port (RS-422 or RS-485 available, if
specified at time of order)
Optional: SCSI metering and programming connectors
SOFTWARE
Optional: National Instruments LabVIEWTM file,designed to run with computer DAQ boards NI 6034E
and NI 6703
COMPUTER SYSTEM Optional: Industrial computer system including dataacquisition and control hardware DAC.
115 VAC switchable to 230 VAC, 50 to 60 Hz single
INPUT
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
Two units, total approx: 17 in. x 12.2 in. x 22 in.
(width x height x depth) excluding handles (425 mm x 310 mm x 560 mm);
19 in. rack mountable

OPTIONAL RGDU-4A RASTER GENERATOR SPECIFICATIONS
10 separate frequency selections for both X and Y
RASTER GENERATOR (X up to 1000 Hz, Y up to 50 Hz) Variable position
offset (centering). Variable window size. All controllable
remotely via RS-232, RS-422, RS-485, or analog input.
DIMENSIONS
17 in. x 3.5 in. x 22 in.excluding handles(width x height x depth) (425 mm x 90 mm x 560 mm); 19 in. rack mountable

A typical lab set-up of a complete Kimball Physics system withpower supplies, electron gun, and optional computer control
systemTypical performance;data for guidance only.
It is not necessarily possible to achieve all maximum specifications
Copyright © 2008 by Kimball Physics, Inc. 11909/08 simultaneously. Specifications Subject to Change Without Notice.