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General Attributes:

Country of Origin: United States

Minimum Order Quantity:  1pcs

Amptek Mini-X2 X-Ray very good price

The Mini-X2 is a miniature X-ray tube system which includes the X-ray tube, the power supply, the control electronics, and the USB communications to the computer.  It is optimized for compact X-ray fluorescence (XRF) applications.  The Mini-X2 has been designed to simplify the XRF process by providing a grounded anode, USB control of current and voltage, a simple collimator mount on 50kV models, and ease of operation.

The Mini-X2 consists of two components: the Mini-X2 X-ray tube module and the Mini-X2 Controller.  The X-ray tube module includes the tube and high voltage power supply. 
Several different options are available: 

The Controller includes the USB communications and software control.  It can be configured, via software, to support any of the X-ray tube modules.  A 10 pin flex cable connects the Controller and the X-ray tube module. Connections to the Controller are 12 VDC power, USB for command and control, and an AUX connector with a safety interlock and a driver for a warning light.

 The Mini-X2 is a replacement for Amptek’s previous Mini-X product family.  The X-ray Tube Module is similar to the previous Mini-X-OEM. 

The Controller has significantly improved control features, including software configurability and faster control and readback.  It utilizes a completely different software interface, based upon the FW6 protocol used with Amptek’s digital pulse processors.

Convenient  threads for attaching collimators or filters are available on all 50kV models.  

Output Spectrum with silver (Ag) target (left) and gold (Au) target (right).  These were measured using a 1 mm thick CdTe detector located 1 meter from the Mini-X2 with a 1 mm pinhole collimator (made from tungsten) in front of the detector.

The Mini-X2 is based on the Newton Scientific Inc. miniature X-ray source.    The Mini-X2 has replaced the Mini-X(orig)

Configuration and Options

Mini-X2 X-ray Tube

Anode material:  The Mini-X2 X-ray Tube is available with one of four anode materials:  silver (Ag), gold (Au), rhodium (Rh), and tungsten (W).  (Ag not available in 70kV)

Maximum Power:  The Mini-X2 X-ray Tube is available with maximum power of 4 W or 10 W.

Maximum HV:  Mini-X2 X-ray Tube is available with an HV range of either 10 to 50 kV or 35 to 70 kV.

• Note that the mechanical dimensions depend on the HV and power options.
• Note that the higher power and/or HV variants require more radiation shielding than the lower power and/or HV variants.
• Note that the 70kV tube does not have a threaded nozzle for attaching collimators or filters.

X-ray tube interface:  The Mini-X2 interfaces with X-ray tubes supplied by NSI (Newton Scientific).  Their standard tubes use an analog interface while their new UltraMini tubes use a digital (I2C) interface.  Both are supported by the Mini-X2 Controller.

Mini-X2 Controller

There is a single Mini-X2 Controller which interfaces with all the Mini-X2 X-ray Tube modules.  Each Controller is programmed, at Amptek, for a specific X-ray Tube module, with its P/N, S/N, maximum kV, maximum power, etc.  Amptek’s Firmware Manager software can be used to reconfigure the Controller for a different tube.

Amptek’s standard Mini-X2 Controller supports only USB communication and only the standard X-ray tubes.  Contact Amptek for Controllers which interface with the UltraMini and/or which support an RS232 interface.

Vacuum Options

Amptek offers a vacuum feedthrough port for the Mini-X2 50kV units which allows customers to bring an x-ray source into a vacuum environment.  There are 2 sizes, one for the 50kV 4W tubes, and one for the 50kV 10W tubes.  

  50kV, 4W Mini-X2 uses the CP100 vacuum feedthrough pn-  ACC-XR0306A0  (ID for 1.00in OD tube)

  50kV, 10W Mini-X2 uses the CP113 vacuum feedthrough pn-  ACC-XR0307A0 (ID for 1.125in OD tube)

Specifications

Mini-X2 Design

X-ray tube

The heart of the Mini-X2 is a compact X-ray tube which uses a transmission target.  The high voltage power supply (HVPS) produces a bias voltage between the target (which is grounded) and the filament.  This voltage accelerates electrons produced at the filament into the target.  When these electrons decelerate in the target material, they produce bremsstrahlung radiation, X-rays with a continuous energy spectrum.  They also produce X-rays at the characteristic energy of the target material.  Many of these X-rays are directed towards the window, made of Be (beryllium), where they can be collimated into the sample.  The X-ray tube contains shielding which stops X-rays outside of the 120^o cone.

High Voltage Power Supply

The HVPS takes the 12 VDC input and steps it up to the commanded bias (10kV to 50kV).  It is a switch mode regulator with a conventional Cockcroft-Walton multiplier, operating between 40 and 100 kHz.

There are three inputs to the HVPS:  an analog voltage which sets the HV, an analog voltage which sets the current, and an ON/OFF logic signal.  The HV and current signals have a range of 0 to 4V, which correspond to the HPVS settings: a 2V input to the HV results in a half-scale output of 25 kV.  There are three outputs from the HVPS: an analog voltage reading the HV, an analog voltage reading the current, and a STATUS logic signal.  These have the same scale factors as the inputs.

The Mini-X2 X-ray tube modules are supplied by NSI.  NSI’s standard X-ray tube modules have analog inputs and outputs, which are the Mini-X2 Controller’s standard inputs and outputs.  NSI has recently released a smaller tube, called the “UltraMini”, which uses a digital I2C interface.  Amptek’s Mini-X2 controller can also support the I2C interface to the UltraMini.

Mini-X2 Controller

The Controller takes the control values commanded via USB and uses these to set the proper control voltages and to send the ON/OFF command.  It also reads the outputs.  There are a few key details to the control and interface module:

• The interlock circuit is very important, both for radiation safety and for successful operation of the Mini-X2. Please refer to sections 4.2 and 8.2 for details.
• The software compares the commanded values for HV and current to the outputs. If the inputs and outputs differ (outside of tolerance limits and sustained for a certain time), the HVPS is disabled.
• The Mini-X2 Controller is based on a Silicon Labs 8051 microcontroller, running the same communications software as Amptek’s digital pulse processors (DP5, X123, PX5, etc). This software interface is called FW6 and is described in the Amptek Digital Products Programmer’s Guide.