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X-ray Detector

The heart of the MWL120 system is a proportional wire chamber with a 30cm x 30cm active area. The detector is equipped with a selection of four interchangeable collimators (0.5, 1.0, 2.0, and 3.0 mm), a fail-safe X-ray shutter, and a gas delivery system comprising a gas regulator with a CGA580 inlet (for a 90% Argon, 10% CO₂ gas mixture). The detector features built-in electronics for digitizing preamplifier signals, and diagnostic and gas flow readings can be viewed from within NorthStar 7, the latest version of our orientation software.

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Computer

The MWL120 system includes a computer with NorthStar 7 preloaded. This computer is tested with your detector to ensure compliance and proper functionality with your MWL120 system.

A USB printer is recommended for use with the MWL120 system. A printer is not supplied by Multiwire and must be purchased from a third party.

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X-ray Source Requirements

The MWL120 system requires an X-ray source for operation. A standard-focus tungsten X-ray tube is recommended that is continuously adjustable over the range of 9 to 25 KV and 1 to 20 mA of current, full-wave rectified or constant potential. The 9 to 20 KV operation is essential for crystals containing significant quantities of elements that may fluoresce in the 5 to 20 keV range. Low voltage operation will minimize the production of fluorescent X-rays which are also imaged by the detector system.

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Environmental Requirements

Room temperature less than 24° C (76° F) and relative humidity less than 50%.

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Power Requirements

Installation of the MWL120 system is provided at additional charge. The customer will need to provide a mounting point for the motor controller and the computer with its peripherals (monitor, keyboard, and mouse). The motor controller and computer chassis conform to a standard 19" (48cm) rack form factor. Also, a power strip with at least four outlets should complement the X-ray enclosure or rack to supply AC power to the system.

Expected Power Draw:

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X-ray Track

A cast iron track approximately 2" (5 cm) wide by 15" (38 cm) long is provided by MWL and serves as a mounting point for accessories such as the three-axis orientation stage and the leaded beam stop.

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Collimator Extension Tube

This tube, supplied with the MWL120 system, engages the camera with your X-ray shutter assembly. Typically, this is an insulated 1/2" (1.27 cm) diameter tube with a 1/8" (0.318 cm) hole through the center. Other sizes are available upon request, such as a 16.5 mm larger-head version for a Philips style X-ray tube.

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Leaded Beam Stop

The leaded beam stop clamps to the X-ray track and absorbs any direct X-rays that might otherwise reach an operator if a crystal sample is removed from the X-ray beam. The leaded beam stop is imperative for radiation safety and can be purchased with the MWL120 system.

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Gas Cylinder

A 1A size gas cylinder with a mixture of 90% Argon and 10% CO₂ is needed to operate the camera and must be available during the time of the installation.

The MWL120 system includes a gas regulator which fits a 580 cylinder outlet and includes all the requisite plumbing to service the MWL120 system. This cylinder should last 4 to 6 months during continuous trickle-flow operation.

A cylinder containing 10% bone dry CO₂ and the balance argon, unanalyzed, with a CGA580 standard outlet can be ordered from Matheson Gas Products, Inc., 1650 Enterprise Parkway, Twinsburg, Ohio 44087, USA, Phone (216)-425-4406.

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Dimensions

See the following PDF for the physical dimensions of the MWL120 system:

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Warranty

MWL provides a one year warranty on all parts and labor for the MWL120 system effective upon installation by authorized Multiwire personnel.

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