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Assembly Materials

Silicone optical interface pads
BC-600 optical cement kit
BC-630 optical grease

An assortment of materials for an optical interface, wrapping and reflector materials are available for assembling your own detector.

  • BC-600 Optical Epoxy Cement
  • BC-631 Silicone Optical Grease
  • BC-634A Optical Interface Pad
  • BC-637 High-temperature Optical Interface Pad
  • BC-622A Reflector Paint for Liquid Scintillators
  • BC-638 Black Wrapping Tape
  • BC-640 Plastic Masking Tape
  • BC-642 PTFE Reflector Tape
  • BC-490 Plastic Scintillator Casting Resin
  • BC-498 Beta Detection Paint

 

BC-600 Optical Cement is a clear epoxy resin formulated specifically for making optical joints with plastic scintillators. BC-600 is a two-part, low viscosity adhesive that can be cured at room temperature. It has a refractive index close to that of plastic scintillators and is ideal for optically bonding them to acrylic light guides or optical windows. (Refractive index of plastic scintillators and acrylic plastic are respectively 1.59 and 1.49).

BC-600 Optical Cement Kit size & part number
500 ml 6600-00002

It is not recommended for coupling scintillators to photomultiplier tubes. For that application we recommend BC-630

BC-631 is a silicone optical coupling compound that features excellent light transmission and low evaporation and bleed at 25oC.  It has a specific gravity of 0.976 and 1.465 Index of Refraction. It is not recommended that BC-631 optical grease be used with Teflon reflector except for temporary optical coupling. We supply this single component formulation in a jar.

BC-631 Optical Grease
113 g (~ 125 ml) 6631-0113
453 g (~ 500 ml) 6631-0453

 

BC-634A is a self-wetting, flexible pad just hard enough to resist tearing while handling. It is formulated for use within the temperature range of -10 to +60oC, has an index of refraction of 1.42 and an internal transmission >98% around 400nm.

We supply BC-634 as ready-to-use disks in specified diameters and in thicknesses of 1, 3 and 6 mm.

Optical Pad Standard Sizes and Part Numbers
Diameter inches (mm)

Thickness inches (mm)

Part number
1” (25.4mm) 0.039 (1mm) 6634A-00047
1” (25.4mm) 0.118 (3mm) 6634A-00041
1" (25.4mm) 0.236 (6mm) 6634A-00165
1.5” (38.1mm) 0.039 (1mm) 6634A-00068
1.5” (38.1mm) 0.118 (3mm) 6634A-00057
1.5” (38.1mm) 0.236 (6mm) 6634A-00194
2” (50.8mm) 0.039 (1mm) 6634A-00046
2” (50.8mm) 0.118 (3mm) 6634A-00056
2” (50.8mm) 0.236 (6mm) 6634A-00096
3” (76.2mm) 0.039 (1mm) 6634A-00021
3” (76.2mm) 0.118 (3mm) 6634A-00042
3” (76.2mm) 0.236 (6mm) 6634A-00166
Typical Thickness Tolerance: +/-0.25 mm (+/-0.0098")
Typical Diameter Tolerance: +/- 1 mm (+/-0.039")

 

BC-637 interface pads are placed between the plastic and photomultiplier tube. BC-637 is rated at 200oC.

Optical Pad Standard Sizes
Diameter inches (mm)

Thickness inches (mm)

Part number
1” (25.4mm) 0.039 (1mm) 6637-00003
1” (25.4mm) 0.118 (3mm) 6637-00031
1” (25.4mm) 0.236 (6mm)  
1.5” (38.1mm) 0.039 (1mm) 6637-00054
1.5” (38.1mm) 0.118 (3mm) 6637-00056
1.5” (38.1mm) 0.236 (6mm)  
2” (50.8mm) 0.039 (1mm) 6637-00004
2” (50.8mm) 0.118 (3mm) 6637-00010
2” (50.8mm) 0.236 (6mm)  
3” (76.2mm) 0.039 (1mm) 6637-00075
3” (76.2mm) 0.118 (3mm) 6637-00024
3” (76.2mm) 0.236 (6mm)  
Typical Thickness Tolerance: +/-0.25 mm (+/-0.0098")
Typical Diameter Tolerance: +/- 1 mm (+/-0.039")

 

BC-622A is prepared from a cross-linked polyurethane resin having exceptional chemical resistance to aromatics, which makes it highly suitable for use with liquid scintillators.  BC-622A reflector paint is intended for use with liquid scintillators, is particularly useful in large, steel or aluminum tanks which require application of the paint at the research site.

BC-622A Reflector Paint for Liquid Scintillator cells
Kit sizes and part numbers
500 ml 622A-00001
1 liter 622A-00002

It is a diffuse reflector and, therefore, should not be used on the major surfaces of long, narrow tanks (total internal reflection should be employed in these).

BC-638 is a black adhesive tape 2" (50.8mm) wide by .008" (0.2mm) thick. Wrapping a plastic scintillator in one layer will give you a light-tight seal.

BC-638 Black Wrapping Tape
2" wide X 32.9m long S-1033-1

 

BC-640 is an adhesive-backed masking paper routinely used for protecting the surfaces of plastic scintillator during handling or storage.

BC-640 Plastic Masking Paper
12” (30.5cm) wide by 300' (91.4m) 6640-00002

 

BC-642 Teflon® tape is frequently used as a reflecting material for non-hygroscopic scintillators. Three layers give you optimum reflectivity.

BC-642 Teflon Tape

2" wide X 13.7m long on 3" PTFE core

.003" (0.08 mm) thick (normal)

 S-1006-7

 

BC-490 is a partially polymerized plastic scintillator that is cured to full hardness by the end user. The scintillator thus formed is clear with scintillation and mechanical properties similar to those of general-purpose plastic scintillators. It is most frequently used in applications which require other materials to be embedded in the scintillator, and which require the casting of unique shapes (often in special holders).

BC-490 Cast Resin Kit sizes and part numbers
500 ml 6490-00002
1 liter 6490-00001

BC-490 is supplied in complete kits with detailed instructions. Each kit contains three parts: partially polymerized scintillator resin, catalyst, and catalyst solvent.

BC-498 Scintillator Paint for Beta Detection is intended for the experimenter who wishes to apply thin coatings of plastic scintillator to various substrates.
BC-498 Paint
500 ml 6498-00003
1 liter 6498-00002