1 / 14

High-energy Performance of X-ray Imaging Spectrometers on board Astro-E

High-energy Performance of X-ray Imaging Spectrometers on board Astro-E. Kensuke Imanishi H. Awaki, T. G. Tsuru, K. Hamaguchi, H. Murakami, M. Nishiuchi, and K. Koyama Kyoto University, Japan. XIS (X-ray Imaging Spectrometer). X-ray CCD camera on board Astro-E

shelagh-kennefick
Download Presentation

High-energy Performance of X-ray Imaging Spectrometers on board Astro-E

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. High-energy Performance of X-ray Imaging Spectrometers on board Astro-E Kensuke Imanishi H. Awaki, T. G. Tsuru, K. Hamaguchi, H. Murakami, M. Nishiuchi, and K. Koyama Kyoto University, Japan

  2. XIS (X-ray Imaging Spectrometer) • X-ray CCD camera on board Astro-E • Front illuminated, Frame transfer

  3. Pulse Height distribution of XIS (55Fe) Mn Ka (5.89keV) 104 Mn Kb (6.49keV) Low energy tail Peak structure 103 102 Counts 101 100 10 -1 0 1000 2000 Channel

  4. Divide the response function into 6 components Main peak Counts Sub peak Triangle component Si escape Si line Constant component Channel

  5. Osaka University Kyoto University Si K edge 10 0 5 X-ray Energy [ keV ] Al Fe Ni Zn Se Cl Ti 55Fe Obtained data points Fluorescent X-ray Radio isotope

  6. electron cloud X-ray Depletion Gate Insulator Main peak Main peak, Sub peak, Triangle component Sub peak Triangle component Channel Stop

  7. Channel vs X-ray energy

  8. Energy resolution (= Main peak width) 200 Energy resolution [eV] 100 Readout noise Wsi : mean ionization energy F : Fano factor Poisson statistics eV

  9. 1500 data calculation 1000 Assumption 1. Electron distribution is sphere with uniform density. 2. Electron cloud radius = 1.71X10-6E1.75 [cm] (Janesick et al. 1986) 3. Electrons generated in the insulator are not counted. Channel 500 Gate Constant component Insulator Depletion 0 103 104 102 101 100 10 -1 Counts

  10. Relative Intensity of constant component Blue : data Green : calculation result Red : multiplied the calculation result by 1.59 10 -1 Constant intensity / Main peak intensity 10 -2 10 1 Energy [keV]

  11. Si fluorescent X-ray (1.74keV) data simulation model Si line 10 Si escape 3 Energy [keV] 3 Total Si line 2 1 Si escape and Si line Si escape 2 1 10 -2 10 -3 Escape intensity/Main peak intensity

  12. Si fluorescent X-ray (1.74keV) data simulation model Si line 10 Si escape 3 Energy [keV] Total Si line 2 3 2 Si escape 2 1 10 -2 10 -4 10 -3 Si line intensity/Main peak intensity

  13. Reproducibility of the response function 55Fe (Mn) response function Ka:5.894keV Kb:6.489keV Mn L

  14. Summary • The response function of XIS CCD camera was constructed. • We considered the physical process inside the CCD, and divided the response into 6 components. • Shape and Intensity of these components were determined as a function of X-ray energy.

More Related