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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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Progress report apr 5 th 2012

Progress Report Apr., 5th, 2012

Yenyun Chang


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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