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Progress Report Apr., 5 th , 2012

Progress Report Apr., 5 th , 2012. Yenyun Chang. Outline. X-ray calibration Design Apparatus Background run Am-241 run Conclusion To do. Design. Source  4m  MAPMT, . Use our Americium instead of CGU’s X-ray source. Hitting rate was ~800Hz, 50cm away, trig. by 1 pixel.

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Progress Report Apr., 5 th , 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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