BOS-25

            BOS-25 Beam Observation System





In standard form, the model BOS-25 Beam Observation system has a 25mm diameter active area MCP and P-43 phosphor screen assembly, housed within a 4.50" (114mm) conflat flange with glass viewport. Electrical connections to the phosophor screen and MCP are made with MHV feedthroughs.

Optional configurations are discussed in detail below and include 6" (152mm) flange mount (BOS-25-6), dual MCP plates (chevron), SHV feedthroughs, fiberoptic windows, and CCD camera systems.

(Dimensions in inches)



SCHEMATIC VIEW, TOP, BOS-25 (4.5" Conflat)            SCHEMATIC VIEW, SIDE, BOS-25 (4.5" Conflat)

View of MCP/Phosphor Imaging Assembly, BOS-25 with dual MCP (4.5" Conflat)

BOS-25 SPECIFICATIONS

Imaging Area:

25mm Diameter

MCP: (Standard)

1.289" Diam. (BOS-25), 10 micron channel diameter, Imaging Grade
25mm active area, 12 micron pitch, 12° Bias Angle, 40:1 Aspect Ratio (Standard, BOS-25)
Max. Gain: 2 x 104 (single plate, Std.) 1000V > 107 (chevron, OPT-01), 2000V

Phosphor Screen (Standard)

P-43 with aluminum overcoat. P-43 Peak Wavelength: λ= 545 nm.

Power Supply Requirements:

0 - + 1000V, 1mA single MCP (Standard)
0 - + 2000V, 1mA dual MCP (OPT-01)
0 - + 5000V, 1 mA Phosphor Screen

Beam Energy Range:

1 eV to over 50 keV

Beam Current Range:

< 10 μA (with optional beam attenuation grids)

Vacuum: 1 x 10-6 Torr or better required to operate MCP

UHV compatible, maximum bakeout temperature 300 C

Welded Glass Windows (Standard)

A non-removable glass window that is welded to the flange is standard. This allows bakeout temperatures > 200C.

OPTIONAL EQUIPMENT

6" Flange Mount (Model BOS-25-6)



   BOS-25-6 (Standard) with Welded glass window



The model BOS-25 is available with a 6" (152mm) flange mount. Feedthroughs are available on edge of flange, or out of the face of the flange (see welded glass window version above) . A welded glass window is standard, with optional removeable fiberoptic window version (BOS-25-6/FO) and 3-3/8" conflat window (BOS-25-6/3.38) version.

Dual MCP systems, MCP Coatings and MCP Type:

Model BOS-25 with BOS-25-OPT-01 dual MCP option
MCPs with optional coating for enhanced imaging of UV and X-rays (KBr, CsI, Cu, CuI, MgO, Au,MgF2)
MCPs with high gain and resolution
MCPs with matched characteristic impedance

PHOSPHOR SCREEN

P-43 is standard but other phosphors are available and include including P1, P11, P15, P20, P22, P24, P31, P45, P46, P47, P48, and P53. See our phosphor screen page for more information. Screens have a standard aluminum overcoat but Indium-Tin-Oxide (ITO) undercoating is also available.

Stand alone MCP/Phosphor assemblies (IDA)  (Optional)

The MCP/Phosphor screen assemblies used by the BOS-40 are available separately.



Model BOS-25-CH-IDA (25mm dual MCP with P-43 phosphor screen)

Extended Platform Mounts  (Optional)

The MCP/Phosphor screen assemblies can be mounted on an extended platform at a specific distance from the vacuum sealing surface or BOS window. This distance is specified by the customer . BOS-40 systems with extended platforms are shown below.

Coherent Fiberoptic Windows (Optional)

Using a fiberoptic faceplate for the vacuum window is the optical equivalent of a zero thickness window.  Phosphor is coated on the vacuum side surface of the fiberoptic window. The image created at the surface of the phosphor is transmitted through the optical fibers of the window to the front surface (air side) of the window by for easy viewing of the image by eye or mountable camera systems. This design allows the phosophor screen to be removed and re-coated or replaced with a different kind of phosphor, without having to remove the MCP assembly.



Model BOS-25-6-FO uses the with removeable fiberoptic window with phosphor coating on the vacuum side surface shown above.

Image Processing Systems   (Optional)

           Model IPS-1 (Frame grabber (PCI bus), cables, software)

Power Supplies   (Optional)

           Model MCPPS-1 (MCP Power Supply, Single MCP, 0-1kV)

           Model MCPPS-2 (MCP Power Supply, Dual MCP, 0-2kV)

           Model PHSPS-1 (Phosphor Screen Power Supply, 0-5kV)

Removeable Glass Windows

          BOS-25, 50mm Dia., 3mm thick, BK7, Pyrex, Fused Silca, Sapphire

Miscellaneous Options

          SHV, SHV-B, BNC Fedthroughs, Electron suppression grids

           Beam attenuation grids (90%, 99%, 99.9%)

                Please use these criteria when determining number of attenuation grids needed:

Ion beams greater than 3.2 nA/mm2, 90% beam attenuation (1 grid)

Ion beams greater than 31.8 nA/mm2, 99% beam attenuation (2 grids)

Ion beams greater than 318.nA/mm2, 99.9% beam attenuation (3 grids)



BOS camera options and specifications

*All camera systems include lens, BOS mounting hardware, video cable, and 12" high-resolution

monochrome monitor*

BOS Model Option

BOS-OPT-02/2622

BOS-OPT-02/2722

BOS-OPT-02/3710

Camera

COHU 2622

COHU 2722 (DualGain)

CIDTEC 3710D

Optical Format

1/2" diagonal

1/2" diagonal

2/3" diagonal

Resolution

768H x 494V RS-170

752 X 582      CCIR

755H x 488V RS-170

752 X 582      CCIR

755H x 484V RS-170

752 X 582      CCIR

Element Pitch (μm)

8.4 x 9.8

8.4 x 9.8

12.0 x 13.7

Area (mm)

6.4 x 4.8

6.4 x 4.8

9.05 x 6.83

Scanning Formats

(Please Specify)

EIA RS-170

CCIR

EIA RS-170

CCIR

RS-170, 2:1 Interlace

CCIR

Electronic Shutter

1/60 - 1/10,000 sec.

1/60 - 1/100,000 sec.

Sync. System

Int./Ext.

Int./Ext.

Int./Ext.

Signal to Noise (db)

>55

58

50

Sensitivity (Face Plate Illumination)

Full Output: .65 lux

Full Output: 0.0012 lux

Full Output: 0.5fc

Input Power (Watts)

3.6

6 max.

8.5 max.

Input Voltage (Volts)

+12 VDC

+24VDC or 115 VAC

+ 15VDC nominal