Ultra-thin AP5 X-ray Windows
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Ultra-thin AP5 X-ray Windows AP5 ultra-thin polymer windows are the highest performing x-ray windows available for low and high energy x-ray analysis. AP5 windows are ideal for applications that require maximum transmission of low energy x-rays, high mechanical strength, light rejection, vacuum tightness, reliability, and increased solid angle. AP5 windows are used in applications where high temperature, light element detection is important and beryllium windows are ineffective (see Figure 1 and 2). AP5 windows can be used in all applications where AP3 windows are used. Mounted AP5 X-ray Window Applications X-ray Detectors ■■Silicon Drift Detectors (SDD) ■■Si(Li) Detectors ■■Si-PIN Detectors Ultra-thin polymer film Maximum transmission of low energy x-rays Charge dissipation UV, IR and visible light rejection Corrosion resistant, hermetic seal High mechanical strength, durable Improved x-ray transmission Unique design geometries possible Minimal spectral contamination Consistent transmission across entire window Thin multi-layer coating Carbon support structure High purity Uniform thickness Window Specifications Open Area: Helium Leak Rate: Max. Temp. (1 atm Differential): Max. Temp.(Zero Pressure Differential): Front Pressure Limit (Atmosphere Side): Back Pressure Limit (Vacuum Side): 74% - 79%, depending on size† <1x10-10 mbar ● L/s‡ 40°C 70°C 2 atm 0.5 atm † See “Light Rejection and Vacuum Tightness” section below Light Rejection and Vacuum Tightness AP5 windows provide good rejection of UV, IR, and visible light. AP5 windows also provide a hermetic barrier to gases. Every window is tested and is guaranteed to have a leak rate of less than 1 x 10-10 mbar ● L/s of helium. The helium leak rate is tested by exposing the parts to a minimum of 0.5 SCFH helium sprayed immediately above and around the window on a calibrated helium leak detector for a minimum of 30 seconds. Test conditions may need to be adjusted depending on mount geometry. WIN-DATA-1006, Rev A Subject to technical change without notice

Window Composition and Structure AP5 windows are composed of ultra-thin layers of polymer, and other thin films with low Z compositions. AP5 windows are supported by a carbon support structure designed to add support for the film at a minimal profile with maximum open area and acceptance angle. Moxtek® attaches each window to a mount using vacuum compatible epoxy adhesive. AP3 Thickness (μm) Rib width (μm) Opening width (μm) Open Area % Acceptance Angle † Opening Width Mechanical Strength AP5 windows are supported by a rigid carbon grid. This patented window design enables the AP5 window to...

Acceptange Angle Graphic Improvement in Solid Angle AP5 vs AP3 Distance (mm) From Sample to Window Subject to technical change without notice

X-ray Transmission, Composite Film and Grid Figure 1 0-2 keV X-ray Transmisson of AP3 and AP5 Windows Figure 2 0-25 keV X-ray Transmisson of AP3 and AP5 Windows Mount Design Please refer to WIN-TECH-1003 for Ultra-thin AP X-ray Window Mount Design requirements, available at www.moxtek.com. 452 West 1260 North / Orem, UT 84057 Phone 801.225.0930 / Fax 801.221.1121 www.moxtek.com info@moxtek.com WIN-DATA-1001a, Rev B Subject to technical change without notice