BX-1 Low Energy X-ray Windows
The BX-1 X-ray window is Moxtek’s premier window and successor to the AP windows series. The BX-1 window is the ideal choice for applications requiring high transmission of low energy X-rays. BX-1 windows are constructed entirely out of low-Z materials and has improved helium permeability performance and temperature tolerance as compared to the AP3 window.
Specifications
Open Area
77%
Helium Leak Rate
< 1x10-10 mbar • L/s *
Max Temperature (1 atm differential)
200° C
Max Temperature (No pressure differential)
200° C
Front Pressure Limit (Atmosphere side)
1.2 atm
Back Pressure Limit (Vacuum Side)
1.0 atm
* 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.
Light Rejection and Vacuum Tightness
Window Compostion
Proprietary ultrathin film with aluminium light rejection layer
High temperature tolerance
Exceeds NASA criteria
Applications
• EDS • XRF • XRD
Features
High Transmission of low energy x-rays
High temperature tolerance
Corrosion resistant
Plasma resistant
Benefits
Decreased counting times for light element identification
Lithium identification possible
Improved bakeout opportunity
Mechanical Strength and Handling
The BX-1 window has been tested and shown to withstand over 3000g of acceleration/deceleration. It has also passed over 10,000 cycles, between 0 and 1.2 atm of differential pressure. As with any light element x-ray window, the BX-1 window has ultra-thin membranes and must be handled carefully to avoid damaging the window.
BX-1 Transmission Curve and Chart
Mounting Structure Requirements
Moxtek has qualified Kovar as the required mount material for BX-1 windows.
Availability
30mm2 open area windows are currently available for sampling with mount design consultation.