Aluminized Mylar
EJ-590/B10HH is an extremely thin polyester film coated on both sides with aluminum metal. The film is specifically fabricated for use in alpha and beta particle radiation detectors as a light-tight radiation window. Due to the extreme thinness of the material, a detector window is usually constructed with two closely laid layers of the film, thus achieving necessary light-tightness by virtue of the mis-alignment of any pinholes that may be present.
The film is typically supplied on rolls with a maximum width of 323 mm (12¾ inch) and maximum length of 7,620 mm (25 feet). It should be handled in a clean environment with care to avoid wrinkling and abrasion.
It may be cemented to support frames by using a variety of commercial adhesives including acrylics, silicones and epoxies. This is best done by carefully taping a flat piece of the film of perhaps 300 mm x 300 mm size to a clean, smooth surface such as a piece of glass plate. A thin adhesive is then applied to one side of the window frame, and the frame then is placed onto the film. This process is repeated to achieve the multiple mylar layers needed for light-tightness. The film may be cleaned by rinsing with methanol or isopropyl alcohol or by gently wiping with clean cotton soaked in alcohol.
Specifications |
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| Thickness | 2.0 micro meter (8.0 x 10-5 inch) | ||||
| Density | 0.29 mg/cm2 | ||||
| Thickness of aluminum layer | 1,000 angstroms per side | ||||
Transparency to Alpha & Beta Particles |
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| Two layers will strip approximately 1 MeV of energy from an alpha particle | |||||
| Two layers will strip approximately 20 keV of energy from a beta particle | |||||
Standard Sizes |
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| 320 mm wide x 5,800 mm long roll | |||||
| 320 mm wide x 7,500 mm long roll | |||||
| Available in widths up to 750 mm | |||||
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1300 W. Broadway, Sweetwater, TX 79556 USA
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