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X-ray Calibration Progress Report - April 5th, 2012

This progress report outlines the X-ray calibration project conducted by Yenyun Chang on April 5th, 2012. It covers the design of the apparatus, background and Am-241 runs, conclusions drawn, and future tasks. The report discusses using Americium as the source, hitting rate, apparatus design, background and Americium run results, and suggested changes for better image quality.

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X-ray Calibration Progress Report - April 5th, 2012

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  1. Progress Report Apr., 5th, 2012 Yenyun Chang

  2. Outline X-ray calibration • Design • Apparatus • Background run • Am-241 run • Conclusion • To do

  3. Design • Source  4m  MAPMT, . • Use our Americium instead of CGU’s X-ray source. • Hitting rate was ~800Hz, 50cm away, trig. by 1 pixel. • Wrap the pipe by aluminum foil

  4. Design

  5. Apparatus • Well made MASK(Thx TC) • Same geometry as theUBAT mask • Made by Lead

  6. Apparatus • MAPMT tube Cables Preamp MAPMT

  7. Apparatus • Mask slot

  8. Alignment

  9. Background Run • About 0.3Hz for every channels. Hz Pixel #

  10. Americium Run • 293Hz totally. Pixel # Hz ?

  11. Americium Run • Threshold ~ 5keV

  12. Conclusion and To Do • Looks like the image is pretty smeared… • Rotate the mask or MAPMT to confirm that the image is really from the mask pattern. • Higher the threshold to >10keV and try again. • ROOT’s TGraph2D has a undesirable auto interpolating function. • Change to 2D histogram.

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