Beam Viewers

There are a number of X-ray cameras along the beamline for diagnostic and focusing applications. Below is a summary of the beam viewers installed at the moment.

White beam viewer before the monochromator

We have a white beam viewer (wbv2) before the monochromator that can be inserted into the beam to ensure the beam is entering the optics hutch (OH2). Remember you should first close the safety shutter to OH2 before moving wbv2. You can control the wbv2 movement through the MxControl panel GUI (filters tab) or via the OH2 spec session by typing 'wbv2 <0, 1 or 2>; 0 = pyrocarbon foil for alignments; 1 = Diamond foil (250 microns) for viewing with an optical camera; 2 = Hole. The white beam can be viewed by typing 'wbv2 1' and looking on the right screen above artemis2 (control PC). You need to select the 'OH2' tab in the firefox webviewer using the mouse for pc144cuda. Remember to open the OH2 safety shutter. You should see a rectangle shaped beam in the top left quadrant.

Flouresence detector after the monochromator

We also have a retractable YAG screen (mbv1) after the mono that can be inserted into the beam to ensure the beam is exiting the monochromator. To insert mbv1 you can either use the MxControl panel GUI (filters tab) or via the OH2 spec session by typing 'mbv1 <0, 1 or 2>; 0 = pyrocarbon foil for alignments; 1 = YAG florescence screen for viewing with an optical camera; 2 = Hole. The monochromatic beam can be viewed by typing 'mbv1 1' and looking on the right screen above artemis2 (control PC). You need to select the 'OH2' tab in the firefox webviewer using the mouse for pc144cuda and you should see a very bright spot in the right top quadrant.

X-ray camera after the torrodial mirror (MBV2) 

We also have a retractable YAG screen after the mirror. To insert the YAG screen you need to use either the MxControl panel GUI (filters tab) or the OH2 spec session by typing 'mbv2 <0, 1 or 2>; 0 = pyrocarbon foil for alignments; 1 = YAG florescence screen for viewing with an optical camera; 2 = Hole. You then need to start the camera (XC-HR50) device server on leda (the windows PC in CC4) by double clicking on the 'XCamera' icon. You can then either use PyDis or beamview software to see the images.

For beamview software, simply type '>beamview oh2' in any shell window and a simple gui interface will appear for the oh2 camera installed

For PyDis software you need to start a 'camoh2' spec session and type >camall ExpTime Wait (eg 0.2 0.2). You then need to start 'PyDis' and connect to the camoh2 session image[0]. The YAG screen images are then displayed.