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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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Presentation Transcript
outline
Outline

X-ray calibration

  • Design
  • Apparatus
  • Background run
  • Am-241 run
  • Conclusion
  • To do
design
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
apparatus
Apparatus
  • Well made MASK(Thx TC)
    • Same geometry as theUBAT mask
    • Made by Lead
apparatus1
Apparatus
  • MAPMT tube

Cables

Preamp

MAPMT

apparatus2
Apparatus
  • Mask slot
background run
Background Run
  • About 0.3Hz for every channels.

Hz

Pixel #

americium run
Americium Run
  • 293Hz totally.

Pixel #

Hz

?

americium run1
Americium Run
  • Threshold ~ 5keV
conclusion and to do
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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