• 120 likes • 203 Views
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.
E N D
Progress Report Apr., 5th, 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. • Wrap the pipe by aluminum foil
Apparatus • Well made MASK(Thx TC) • Same geometry as theUBAT mask • Made by Lead
Apparatus • MAPMT tube Cables Preamp MAPMT
Apparatus • Mask slot
Background Run • About 0.3Hz for every channels. Hz Pixel #
Americium Run • 293Hz totally. Pixel # Hz ?
Americium Run • Threshold ~ 5keV
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.