PEEM-3 Instructions-6.doc - PEEM-3 User Instruction Manual...

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PEEM-3 User Instruction Manual Updated by Pupa Gilbert on 3/23/2014 Click on the shortcut menu here to directly go to a specific location in this manual. Shortcuts: a. Sample preparation b. Sample orientation c. Changing samples , transfer failure d. Obtaining an image Straight-imaging mode, 2013 e. Adjusting the tilt , end-of-range limit f. Slits g. Tuning M101 h. Acquisition time i. KB mirrors j. Shutter k. Changing Gratings l. PIC-Stacks data taking m. PIC Stack data processing m.1. Align m.2. Normalize to Izero m.3. Div mapping m.4. ROI Manager m.5. PIC-mapping off- and on-peak n. Attenuating flux To quit a program on a PC, move the mouse to the bottom gray bar, right click on it, and select “Task Manager”, select the program (e.g. IDL) then “End Task”. a. Sample preparation Samples can be a maximum diameter of 23 mm and a maximum thickness of 3 mm . b. Sample orientation When mounting samples, make sure that the circular hole in the side of the square cap goes towards the spiral screw (down, in PEEM). This is no longer needed, the hole can go in any direction. Make the sample look like an upside-down lollipop, sample (candy) is down, and transferring handle (stick) hooked to it is up: now the sample surface is oriented exactly as it will be in PEEM images on screen, and during all sample motions in Preview during normal Lens Setup Straight Imaging. The orientation in the large FOV is inverted. c. Changing samples Insert samples in Dock 1 or Dock 2 or Dock 3. As of March 2011 all three docks work well. Dock 1 is the one closest to PEEM, Dock 3 is the farthest. 1
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Mount samples on the “handle&key” object. To secure a sample on the “handle&key”, take the coaxial “key” out, penetrate the hole in the samples, then press the key in. When handling the sample, make sure you keep the key pressed in. Let the sample rest on the Al platform while climbing up the stairs. To get the sample in Dock 1 or 2 or 3, place it in the correct position, then rotate the key clockwise ¾ of a turn . You will feel the sample going down, and clicking. The click indicates that the sample is secure. Lift the key, and remove the handle and key. To get a sample in or out of Dock 3 go to PEEM3 Mechanical Sample Transfer Tab on top left, in the Load Lock Positions box, click on LL3, so the LL3 is bright green. LL1 is good to put/take samples in/out of both Dock 1 and Dock 2. Go to the beamline monitor, in the gray “Loadlock Chamber” box, click on the word Vented and select “pump”, this will make it read Pumped For transfers, LoadLock chamber pressure must be <4 10 -7 Torr and sample transfer chamber (SAMPLE XFER) <1.5 10 -7 Torr Lens Setup Sample Voltage ZERO Check on the HV power supply that the Voltage is really 0, and manually switch the power supply off.
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