ALKALI ION GUN / POWER SUPPLYELECTRON GUNSIGS-4 / IGPS-450 eV to 5 keVCs, Li, Na, K, Rb ALKALI METAL ION BEAMSFOR USE IN:ION GUNSSECONDARY ION MASS
SPECTROMETRYION ACCELERATORSSURFACE PHYSICSVACUUM PHYSICSFEATURES / OPTIONS:BEAM CURRENTS up to 5 μA
WIDE OPERATING ENERGY RANGE
UNUSUALLY SIMPLE OPERATIONCONTAMINATION IMMUNITYRASTERINGLOW POWER CONSUMPTIONBAKEABLE TO 350°C
INTERCHANGEABLE WITHGAS ION SOURCESCOMPUTER / REMOTE CONTROLThe IGPS-4 Power Supply Unit contains all power supplies necessary
to generate the required voltages to run an IGS-4 Ion Gun. All power
supplies are electronically regulated. An external connector allows
control of all gun power supplies, including the floating supplies, via 0
to 10 V analog inputs at ground potential (deflection supplies use -10 V
to +10 V analog inputs). All common computer interface bus types canbe accommodated, by use of appropriate D to A converters.

DETECTORSUHV technology is used throughout. The source may be completely
disassembled for cleaning or repair. Source firing units are user
replaceable, and can be inexpensively rebuilt at Kimball Physics. Thesource is not damaged by repeated exposure to atmospheric gases orwater vapor when cold; and it may be run in vacuums from 10-11 torr to10-5 torr. It is bakeable up to 350°C with cables removed.
Non-standard mountings are available.

ISPS-4 Ion Source Power SupplyToll Free: 1 888 KIM-PHYS (1 888 546-7497) e-mail: info@kimphys.com
Tel. 1 603 878-1616 Fax: 1 603 878-3700

2-7

INDEX / INFORMATIONCOMPONENTS

The Kimball Physics IGS-4 Ion Gun, with its matching IGPS-4 Power
Supply represents a significant advance in alkali-metal
surface-ionization ion-source technology. It is intended for use in avariety of mass spectrometry and surface physics applications. By useof different source firing units, the alkali ion beams of Cs, Li, Na, K, andRb can be generated. The alkali metal is generated as needed by asolid-solid chemical reaction, and is then surface ionized andevaporated with low energy spread. The resulting ion beams can begenerated down to low energies, and very low currents. Beamdivergence and beam alignment are both controllable using a build-in
electrostatic condenser lens and electrostatic centering deflection
plates. The ion gun with its power supply is a complete subsystem
ready to attach and turn on.

EMITTERS

IGS-4 Ion Source Mounted on a 2¾ inch CFF

IGS-4 ION GUN SPECIFICATIONSIGPS-4 ION GUN POWER SUPPLY SPECIFICATIONSBEAM ENERGYBEAM CURRENTOUTPUTSENERGY STABILITY
BEAM STABILITY

50 eV to 5 keV (Independently adjustable)
1 nA to 2 μA (Independently adjustable)
Ion species dependent
ENERGY SPREAD
Approx. 0.4 eV thermal spread, calculated
SPOT SIZE
Less than 1 mm to 10 mm (Independently adjustable)
WORKING DISTANCE Typical: 100 mm. Range: 10 mm to 200 mm
BEAM DEFLECTION
Optional: 4 Pole Electrostatic: ± 5° at 1500 eV
PULSE CAPABILITY
Optional Dual Grid Power Supply: pulse width 1 μs to(using appropriate pulse DC, rep rates to 1 kHz
generator,
not furnished)
ION SPECIES
Cs+, Li+, Na+, K+, or Rb+
ION GENERATION
Surface-ionization Alkali Alumino Silicate Plug. DirectlyMETHOD
heated, not harmed by atmospheric gases while cold
MOUNTINGFlange Adaptor with a 2¾ inch CFF
BEAM ALIGNMENT
Optional: Mechanical alignment with ±2° Port Aligner
INSERTION LENGTH
Standard: 127 mm. Range: 107 mm to 147 mm. Custom
lengths available. Gun manufactured at standard length
unless otherwise specified at time of order.
SOURCE DIAMETER
25.4 mm at gun flange. Necks up to 31.8 mm at 83 mmfrom flange
FEEDTHROUGHS
Multipin brazed ceramic, threaded stainless steel shell
CABLES /Multiconductor high voltage fully ground-shielded, withCONNECTORS
mating aluminum connector to connect gun and power
supply. Standard lengths: 3 m Optional: 5 m
MAXIMUM BAKEOUT 350°C with cables removed

All necessary voltages to drive the IGS-4 Ion Gun±0.01% per hour; ±0.02% per 8 hours at full output±1.0% per hour with Emission Current Control or±10% per hour after warm up without ECC
CONTROLS
Energy, Focus, Grid, Source, Emission Current Control,X and Y Deflection (optional)
COMPUTER REMOTE All power supplies (except deflection): 0 to +10 volts
CONTROL
Deflection power supplies: -10 to +10 volts
METERING
Digital: Energy, Focus, X and Y Deflection (optional);
Analog: Emission, Grid, Source Volts, Source Amps
INPUT
105 to 125 VAC switchable to 210 to 240 VAC, 47 to63 Hz, 100 W
DIMENSIONS
17 in. x 7 in. x 17 in. (432 mm x 178 mm x 432 mm);(width x height x depth) with rack mount kit, overall width is 19.5 in. (495 mm)

IGS-4 ION SOURCE(Dimensions in mm)

Typical performance;data for guidance only.

IGS-4 ION SOURCE

IGS-4A-076 / IGPS-4B-061
06/24/95

20

SOURCE CURRENT = 1.80 A
SOURCE VOLTAGE = 1.28 V
SOURCE CURRENT = 1.70 ASOURCE VOLTAGE = 1.16 V

1.51.0

FOCUS VOLTAGE = 80.4% OF ENERGYGRID = 0 V
FARADAY CUP BIAS = -50 V
WORKING DISTANCE = 55 mm-7
CHAMBER PRESSURE = 9.0 x 10 torr

0.5500

IGS-4-095 / ISPS-4B-073
1/21/99

ENERGY = 5000 eV
GRID = 0 V
SOURCE CURRENT = 1.70 A
SOURCE VOLTAGE = 1.12 V
WORKING DISTANCE = 100 mm-7
CHAMBER PRESSURE = 5.0 x 10 torr

15105

CIGS4095a_00.jnb
C4A076_2.JNB

0.0600SPOT SIZE vs FOCUS VOLTAGE (CESIUM SOURCE)
IGS-4 ION SOURCESPOT SIZE (mm)2.00.0BEAM CURRENT (nanoamps)

25BEAM CURRENT vs ENERGY (CESIUM SOURCE)

1.02.0

3.0

ENERGY (keV)

4.005.0

IGS-4 ION SOURCE

IGS-4A-081 / IGPS-4B-064
07/30/96
SOURCE CURRENT = 1.80 A
SOURCE VOLTAGE = 1.31 V
SOURCE CURRENT = 1.70 A
SOURCE VOLTAGE = 1.21 V
SOURCE CURRENT = 1.60 A
SOURCE VOLTAGE = 1.11 V

400300200100

FOCUS VOLTAGE = 70% OF ENERGYGRID = 0 V
WORKING DISTANCE = 95 mm
CHAMBER PRESSURE = 9.0 x 10 -7 torr00.01.02.0

3.0

ENERGY (keV)

4.002.4

BEAM CURRENT vs ENERGY (LITHIUM SOURCE)

BEAM CURRENT (microamps)

BEAM CURRENT (microamps)

2.51000

2000

5.0

5000

BEAM CURRENT vs ENERGY (POTASSIUM SOURCE)

2.0

IGS-4A-067 / IGPS-4B-055
03/08/95
GRID = 0 V
WORKING DISTANCE = 100 mm-7
CHAMBER PRESSURE = 2.0 x 10 torr

1.6
1.20.8SOURCE CURRENT = 1.45 A
SOURCE VOLTAGE = 1.0 V

0.4
NOTE: FOCUS ADJUSTED FOR MAXIMUM CURRENTAT 5.0 kV AND REMAINS PROPORTIONALC4A_067_1.JNB

0.0

2-8

4000

IGS-4 ION SOURCE

0.0

C4A081_01.JNB

3000

FOCUS VOLTAGE (volts)

1.0

2.0

3.0

ENERGY (keV)

4.0

5.0

It is not necessarily possible to achieve all maximum specifications
simultaneously. Specifications Subject to Change Without Notice.