Title of article :
Study of avalanche photodiodes for soft X-ray detection below 20 keV
Author/Authors :
Yatsu، نويسنده , , Y. and Kuramoto، نويسنده , , Y. and Kataoka، نويسنده , , J. and Kotoku، نويسنده , , J. and Saito، نويسنده , , T. and Ikagawa، نويسنده , , T. and Sato، نويسنده , , R. and Kawai، نويسنده , , N. and Kishimoto، نويسنده , , S. and Mori، نويسنده , , K. and Kamae، نويسنده , , T. and Ishikawa، نويسنده , , Y. and Kawabata، نويسنده , , N.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2006
Pages :
10
From page :
134
To page :
143
Abstract :
The performance of the large area reach-through avalanche photodiode (APD), manufactured by Hamamatsu Photonics, K.K. as a high resolution X-ray detector is presented. The mentioned APD has an area of 3 mm ∅ , a fast time response for signal carrier collection and its thick depletion layer of 130 μ m shows a potential to be used as an effective X-ray absorber below 20 keV. Having a capacitance of ∼ 10 pF and a low dark current of 5 nA for a gain of 15, at room temperature, this APD had demonstrated one of the best energy resolutions within this kind of devices: 6.4% (FWHM) for 5.9 keV photons with a minimum detectable energy of 0.3 keV, measured at - 20 ∘ C . The experiments for the timing property were made in a synchrotron beam facility using an 8 keV X-ray beam; the reached count rate was above 10 8 counts/s, corresponding to a very short dead time of 4.5 ns/pulse. In order to test the radiation hardness of the APD, the device was irradiated at a Ring Cyclotron Facility with a 53.5 MeV proton beam. The total dose was of 11.3 krad and no fatal damage was found in the APD, although the dark current of the APD had shown an increase of one order of magnitude. Finally, the obtained results allow us to affirm that the reach-through APD has the potential to become an excellent X-ray detector, especially in the space mission application.
Keywords :
Avalanche photodiode , X-ray detector
Journal title :
Nuclear Instruments and Methods in Physics Research Section A
Serial Year :
2006
Journal title :
Nuclear Instruments and Methods in Physics Research Section A
Record number :
2201120
Link To Document :
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