The Mini-X-OEM is a precision x-ray generator designed for applications that require small size and low power consumption. The source includes a miniature sealed x-ray tube with a transmission-type end window and a high voltage power supply encapsulated in a single radiation-shielded unit. The source is designed specifically to be used as component of a bench-top or hand-held x-ray spectrometer for the detection of trace elements using x-ray fluorescence spectrometry.
The Mini-X-OEM differs from the Amptek Mini-X. The Mini-X has a USB interface to control the voltage and current through PC software and makes it easy to set up XRF experiments. The Mini-X-OEM version is controlled by the end user, by supplying analog voltages to control the voltage and current of the tube. This is the preferred method in table-top and hand-held OEM applications where all the functions of the instrument are controlled by a single internal computer.
|Tube voltage||5 kV – 50 kV|
|Tube current||0 - 200 µA, See Figure 2|
|Tube power||4 Watts maximum|
|Cathode type||Tungsten filament|
|X-ray window||Be, 125 µm|
|Target material||Standard: Au, Ag or Rh|
|Focal spot size||Approximately 2 mm|
|Output cone angle||120°, See Figures 3 and 4|
|Input voltage||6 - 12 VDC range|
|Input current||@ 6 VDC: 1.35 A typical, 1.5 A max|
@12 VDC: 0.70 A typical, 0.75 A max
|HV stability||< 0.1%|
|Radiation shielding||Self-shielded (except output window).|
Shielding of output window is the responsibility of the customer.
|Cooling||Conduction, Heat sink to be supplied by customer.|
|Operating temp||-10 °C min, 60 °C max. case temp|
|Ambient humidity||30 to 90% (non-condensing)|
|Dimensions||Please see mechanical drawing Figure 1.|
|PIN 1||V+, (6-12 VDC)|
|PIN 2||V+, (6-12 VDC Nom.)|
|PIN 5||Tube I Control|
Input (0-4 V = 0-200 µA)
|PIN 6||Tube HV Control|
Input (0-4 V = 0-50 kV)
|PIN 7||Filament Ready|
(0-5 V, Low = Not Ready, High = Ready)
|PIN 8||Tube Enable|
Input (0-5 V, Low = Off, High = Enable)
|PIN 9||Tube HV Monitor|
Output (0-4 V = 0-50 kV)
|PIN 10||Tube I Monitor|
Output (0-4 V = 0-200 µA)
Figure 1. Mechanical Dimensions.
Figure 2. Mini-X-OEM 4W Isopower curve.
|Energy (kV)||Pin 6 (V)||Current (µA)|
|Pin 5 (V)|
Figure 3. Mini-X-OEM Angular Response, 120° cone.
Figure 4. Mini-X-OEM 120° cone.
NOTE: When using the 2 mm collimator, the X-ray cone is 5°.
Amptek suggests that first time customers of the Mini-X-OEM purchase at least one MX50 USB controller. This USB controller interfaces with the Mini-X-OEM and provides easy software control of the unit over USB. This allows for easy troubleshooting, and rapid setup and prototyping.
Figure 5. MX50 USB Controller for the Mini-X-OEM.
Figure 6. MX50 USB Controller for the Mini-X-OEM.
Figure 7. MX50 USB Controller for the Mini-X-OEM.
Figure 8. USB Software Interface. Allows the user to set the voltage and current as well as monitor both parameters.
The Mini-X-OEM is only one component of an X-ray instrument. It is the responsibility of the OEM to provide a fail safe metal enclosure to prevent escaping radiation while their customers use this product. The OEM final instrument (turn-key system) must comply with local government regulations to protect personnel from exposure to radiation. Amptek Inc. bears no responsibility for the incorrect use of this product.
The Mini-X-OEM is manufactured and warranted (one year or 2000 hours, whichever comes first) by Newton Scientific Inc.
Mini-X-OEM X-Ray Tube in PDF
Revised August 28, 2013