RUGGED and UHV P22 PHOSPHORPHOSPHOR:

FOR USE IN:

ION GUNSZnS:Ag Type 1330 (P-22 Blue)3 x 10-2 Amps/cm2450 nanometers
1 Watt/cm25 x 10-5 Watts/cm2

FEATURES / OPTIONS:HIGH LUMINOSITY P22 PHOSPHORSENSITIVE TO ELECTRONS,STARTING AT 500 eV
EASY HANDLING / HIGH ABRASIONRESISTANCE (RUGGED SCREENS)UHV COMPATIBLE, BAKEABLEMETAL or GLASS BACKING
STANDARD SIZES MATCH eV Parts®
RAPID AVAILABILITY, LOW COSTUHV Phosphor Screens (designated by UP22), with no binder, arecompatible with vacuums better than 1 x 10-8 torr. Although thesescreens are better for ultra high vacuum, they are more fragile andrequire greater care when handling; since the phosphor coating isdelicate and can be easily destroyed. Damage will result from touchinga UHV Phosphor coating; shock from knocking or dropping the screen
may cause the phosphor coating to flake off. Standard UHV screens
are shipped with a stainless steel protective cover. The thickness of theUHV phosphor ranges from 50 µm to 70 µm.
The phosphor can be deposited either on a 0.012 or 0.025 inch thick304 stainless steel plate (SS) or on 0.030 inch thick conductive glass(GL) fitted into a stainless plate for mounting. The screens depositedon metal must be viewed from the electron impact side (since the metalis opaque). The screens deposited on glass and held in a metal frame,can be viewed from either side (since the glass is transparent).

3) Ruggedized screens are bakeable up to 200°C; UHV screens arebakeable up to 350°C.
4) Larger screens, mounted in either six or eight inch viewports arealso available. The diameter of a screen for a six inch viewport
would be 4.2 inch and the diameter of a screen for a eight inch
viewport would be 6.2 inch. These larger phosphor screens can bedeposited on leaded glass if required.
5) Rugged screens on stainless steel are deposited directly on thesquare plate. UHV screens on stainless steel are deposited on around stainless steel plate that is affixed to the square mounting
plate by four equally-spaced tabs spot-welded to the square
mounting plate and to the underside of the round (phosphorcoated) plate.
6) Standard phosphor screens deposited on conductive glass (bothRugged and UHV) are held between two stainless steel plates,
within a center hole, by four equally-spaced tabs on both sides ofthe screen. The tabs, which are spot-welded to the stainless steel
plates, also serve to bleed off charge from the screens.

Custom Phosphor Screens can be deposited on almost any metal,
glass, or ceramic surface on a special order basis. Round screen
diameters can range from 10 mm diameters, up to more than 200 mmin diameter. Rugged phosphor screens can be made in a variety ofcustom sizes and shapes; rectangles, strips, and patterned shapes arepossible; edge definition is better than 100 micrometers. Custom
screen can be made up even in quantities of one. Contact Kimball
Physics Engineering for more information.

Maltese-cross shaped spot from an unfocused LaB6 cathodeseen on a custom phosphor screen inside the vacuum chamber
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

EMITTERS2) When using the phosphor screen, input power density should notexceed 1 Watt/cm2, or the phosphor coating may be damaged To
preserve screen brightness, it is advisable to use the lowest beam
power density that provides a clear spot. Normal usage will resultin gradual browning of the screen.

4-6

DETECTORS

Rugged Phosphor Screens (designated by RP22) are easy to handle
and unusually resistant to mechanical damage and rough handling.
Ruggedized Screens are bonded to their metal or glass backings using
a bonding agent which has a low but non-zero vapor pressure. Due tothe binder, the rugged phosphor is only suitable for vacuum pressures
down to 10-8 torr (at the lower end of this operating range, someoutgassing may be observed). The rugged screens are particularly
suited for use in experimental vacuum systems. Rugged screens havea phosphor thickness of approximately 75 µm.

NOTES:1) Using the phosphor screens at electron energies below the firstunity-secondary-emission crossover point may cause the screen to
charge up to electron cathode potential, at which point the screen
temporarily goes out.

COMPONENTS

Kimball Physics Phosphor Screens are made of high luminosity P22phosphor (ZnS:Ag). The screens are sensitive to electrons starting at
approximately 500 eV with a threshold of 1 x 10-7 A/cm2 at 500 eV. Themaximum recommended input beam power density is 1 Watt/cm2.
Two general types of phosphor screens are made by Kimball Physics:
UHV screens and Rugged screens.

6 inch CF thin flange-mounted UHV Phosphor Screen andthree standard Phosphor Screens on 0.7, 1.4, and 2.0 inch squares

INDEX / INFORMATIONBEAM DETECTION
BEAM ALIGNMENTLENS TESTING
UNIFORMITY TESTINGSURFACE PHYSICSUHV EXPERIMENTS

PHOSPHOR TYPE:
SATURATION THRESHOLD:PEAK EMITTED WAVELENGTH:
MAXIMUM INPUT POWER DENSITY:MINIMUM POWER DENSITY:

ELECTRON GUNSPHOSPHOR SCREENSPHOSPHOR SCREENSPHOSPHOR SCREEN PART NUMBERS AND DESCRIPTIONS:
PHOS-RP22SS-B5x5-R500 (Rugged)
PHOS-UP22SS-B5x5-R500 (UHV)
0.50 inch phosphor on 0.700 inch square,
0.012 inch thick stainless steel B5x5 plate

PHOS-RP22GL-B5x5-R500 (Rugged)
PHOS-UP22GL-B5x5-R500 (UHV)
0.50 inch phosphor on 0.030 inch thickconductive glass fitting in a 0.700 inch square,
0.012 inch thick stainless steel B5x5 plate

PHOS-RP22SS-B7x7-R750 (Rugged)
PHOS-UP22SS-B7x7-R750 (UHV)
0.75 inch phosphor on 1.000 inch square,
0.012 inch thick stainless steel B7x7 plate

PHOS-RP22GL-B7x7-R750 (Rugged)
PHOS-UP22GL-B7x7-R750 (UHV)
0.75 inch phosphor on 0.030 inch thickconductive glass fitting in a 1.000 inch square,
0.012 inch thick stainless steel B7x7 plate

PHOS-RP22SS-C5x5-R1000 (Rugged)
PHOS-UP22SS-C5x5-R1000 (UHV)
1.00 inch phosphor on 1.400 inch square,0.025 inch thick stainless steel C5x5 plate

PHOS-RP22GL-C5x5-R1000 (Rugged)
PHOS-UP22GL-C5x5-R1000 (UHV)
1.00 inch phosphor on 0.030 inch thickconductive glass fitting in a 1.400 inch square,0.025 inch thick stainless steel C5x5 plate

PHOS-RP22SS-C7x7-R1500 (Rugged)
PHOS-UP22SS-C7x7-R1500 (UHV)
1.50 inch phosphor on 2.000 inch square,0.025 inch thick stainless steel C7x7 plate

PHOS-RP22GL-C7x7-R1500 (Rugged)
PHOS-UP22GL-C7x7-R1500 (UHV)
1.50 inch phosphor on 0.030 inch thickconductive glass fitting in a 2.000 inch square,0.025 inch thick stainless steel C7x7 plate

Drawings shown actual size

0.5X
Phosphor Screens on conductive glass
on 0.7, 1.4, and 2.0 inch diameter stainless steel plates
4-7

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

Thin Flange Mounted Phosphor Screens
2¾ CF, 4½ CF, 6 CF and 8 CF sizes
RHEED Applications
Sandwiches between existing viewport and system CF flangeNEWTDEEORTCSION GUNSHIGH LUMINOSITY P22 PHOSPHORSENSITIVE TO ELECTRONS, STARTING AT 500 eV
AVAILABLE WITH UHV AND RUGGED PHOSPHORUHV COMPATIBLE, BAKEABLECONDUCTIVE GLASS BACKING
THIN FLANGE - MOUNTED FOR EASY INSTALLATIONBETWEEN TWO STANDARD CF FLANGESELECTRON GUNSPHOSPHOR SCREENSUHV Phosphor Screen on conductive glass, mounted in a 6 inch CF
double-sided Thin Flange
The Thin Flange is 0.4” thick and must be sandwiched between a window
flange and the corresponding system CF flange.

Separate standard CF flange glass viewports are available as a option.

PART NUMBERTYPE

PHOSPHOR SIZEPlease refer to the first page of “Phosphor Screens” for more
information.

FLANGE SIZE

PHOS-UP22GL-CF2.75 P22
PHOS-RP22GL-CF2.75 P22
PHOS-UP22GL-CF4.5 P22
PHOS-RP22GL-CF4.5 P22
PHOS-UP22GL-CF6 P22

UHVRuggedUHV
RuggedUHV

1.43 inch dia.
on conductive glass

2¾ inch CF

2.83 inch dia.
on conductive glass

4½ inch CF

4.20 inch dia.
on conductive glass

6 inch CF

PHOS-UP22GL-CF8 P22

UHV

6.20 inch dia.
on conductive glass

8 inch CFToll Free: 1 888 KIM-PHYS (1 888 546-7497) e-mail: info@kimphys.com
Tel. 1 603 878-1616 Fax: 1 603 878-3700

4-8MOUNTING
0.4 inch thick double-sided Multi-CFThin Flange
The Thin Flange must be sandwiched
between a viewport and corresponding
system CF flange.

COMPONENTS

The Thin Flange-Mounted Phosphor Screens come in 2¾ CF, 4½ CF,
6 CF and 8 CF flange sizes. All Thin Flanges are 0.4 inch thick,double-sided, and have double-density clear bolt holes. Please referto the “Thin Flange” specifications in the Multi-CF Fittings section ofthe website.

The smaller CF size flanges are available with either UHV or rugged
style phosphor screens. UHV phosphor screens are compatible withvacuums better than 1 x 10-8 torr. Careful handling is required withUHV phosphor screens as the coating is extremely delicate. Rugged
phosphor screens are easy to handle and unusually resistant tomechanical damage and rough handling. However, due to the binder,
the rugged phosphor is only suitable for vacuum pressures down to
10-8 torr, where some outgassing may be observed. Ruggedized
screens are bakeable up to 200°C, while UHV screens are bakeableup to 350°C.

INDEX / INFORMATIONThe Thin Flange Mounted Phosphor Screen
The Thin Flange-Mounted Phosphor Screen is designed for in-vacuum
mounting and must be must be used in conjunction with a separate
conflat viewport. The Thin Flange is inserted between an existing
conflat window and its mating system flange. The gasket crushingbolts pass through the Thin Flange without putting any force on it.

DETECTORS

Careful handling is required with UHV phosphor screens as
the coating is extremely delicate.

EMITTERSPHOSPHOR SPECIFICATIONS:Phosphor type: ZnS: Ag Type 1330 (P-22 Blue)
Saturation threshold: 3x10-2 A/cm2
Peak emitted wavelength: 450 nm
Max. input power density: 1 W/cm2
Min. power density for screen response: 5x10-5 W/cm2