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Table of Contents


Introduction


The X-Ray Image Logger (XMSL) takes a series of X-Ray images 2-D x-radiographs from either whole-round sections or section-halves. Sections are measured one by one.

WARNING: This is an X-Ray You are using an imaging system which contains a radioactive works with an X-ray generator source. Do not place your hand under the source or bypass any of the security measures. Ensure that you receive the appropriate training before using the instrument; failure to do so can result in physical harm.

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  1. Double-click the IMS icon (Figure 1). IMS initializes the instrument, tests communications, homes the motion control system and verifies the Dark and Light Calibrations. For more information refer to the XMSL User Guide.



Figure 1. - IMS icon.

2. Prior to imaging cores the user must:

Test exposure parameters in the Imaging Utility (For more information see the 'Imaging Utility Section' within Instruments> Camera: Imaging Utility Section section in the XMSL User Guide).

Set exposure parameters in the Measurement Editor (DAQ > Measurement Editor).

Adjust the automatic image processing settings (Image Processing section on in the XMSL User Guide)

NOTE: Ask the PP technician to help with these steps.

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  1. Select DAQ > Measurement Editor from the IMS panel menu (Figure 2).
    1. Interval: Number of centimeters the core will move between each image. This value is hardcoded in IMS software and cannot be changed in this window. This interval guarantees image overlap and maximizes system efficiency. Default interval is set at 12 cm.
    2. Width: Fixed length of the produced image. This value is dependent on the detector and hardware setup. Default length is 15 cm.
    3. Stack: Number of x-radiographs taken at each position. These images are stacked and averaged to produce the final raw image. 20 images is the standard. Stacking more images does not improve the image quality further. See the User Guide, 'Image Stacking' section for more information.
    4. Exposure Time: Duration of each exposure in milliseconds.
    5. kV: X-ray tube voltage. Maximum voltage for the source is 120 kV. Lowering the voltage while maintaining the number of x-rays penetrating the core (longer exposure or higher current) will increase image contrast.
    6. mA: X-ray tube current. Maximum current for the source is 1 mA. Increasing the current will increase contrast if voltage is kept constant.



Figure 2. - XMSL Measurement Editor Window.

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  1. Place section in the core tray. Make sure the section is oriented blue endcap towards the X-Ray source (Figure 3).




Figure 3. - Correct core position.


2. Click START. The Section Information screen is displayed (Figure 4).


Figure 4. - XMSL Section Information Screen. 

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5. Ensure that the section is inside the track system (using the first loading door) and that all doors are properly closed. Green and yellow lights on top of the lead box should be on. If doors aren't properly closed the green light will not appear, and a error message will be displayed on the screen (Figure 5).


Figure 5. - Warning message indicating that the source is not ready to ramp up.

NOTE: If both doors are closed properly and this message is displayed, please contact the PP technician.

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8. When the section is over the detector, the x-ray source will ramp up and a status window with its status will appear will be displayed on the screen (Figure 6). Once mA and kV are stable, the window will close and image acquisition will begin. User may abort at any time by clicking the ABORT button.



Figure 6. - X-Ray status. As the source ramps up, the measured values will update.

WARNING: During X-Ray measurements a flashing red light will be on. Do not DO NOT open the doors during this period. Failure to comply, can result in physical harm.


9. System The instrument will move the core and automatically take each section down the track system, automatically taking images along the section (Figure 7). This continues, until the actuator reaches its limit switch and returns to the it's home position. 


Figure 7. - IMS display during imaging. 

10. Source The source ramps down, and a window with the message 'X-RAY OFF'  is displayed on the screen (Figure 8) will appear and the red light will turn . The red light on top of the lead box turns off.


Figure 8. X- X-Ray OFF status window.


11. XMSL Section Information window will reappear window is displayed on the screen (Figure 89).


Figure 89. - Sample Information Window- Pusher End Sequence View.

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11. Open the load door and place the Pusher section (either XMSL whole-round or section-half Pusher section ) onto the track. Close the load door.

12. Click PUSHER END SEQUENCE.  The source will ramp up back and the motion control system will continue to push the section through the x-ray system.

NOTE: If the detector grid pattern becomes visible in the images ask the Physical Properties technician  to recalibrate the detector, contact the PP technician, as the detector will have to be recalibrated. 

13. When the imaging is complete, IMS will automatically process the raw images and output them to the C:\AUX_DATA folder. The raw images output to the C:\DATA\IN folder. For more information on IMS image processing, see the 'Automatic Image Processing' section in the User Guide.

14. Each Every thirty minutes both raw an and processed images will be are automatically copied automatiacally to DATAdata1 (\\CLEVELAND)(S:)\data1\7.3 Petrophysics_XRAY\mirror). Be careful before delete a extremely careful when deleting an image on the X-Ray computer, as any change on the X-Ray computer will produce the same change on 'data1'will be automatically replicated on data1.


  • ABORT button

  1. During imaging, At any time during imaging a user can click the ABORT button to end the imaging process and ramp down the source. Once pressed, imaging will end and it will be necessary to start imaging the section from the beginning.
  2. A dialog window with different options will appear (Figure 910).


Figure 910. - Abort by User dialog box. 

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All improvements to the Quick Start Guides and User Guides are a communal effort, with honorable mention to the group of LOs, ALOs, and technicians who have helped.


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