کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5365384 | 1388330 | 2008 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Determination of positron beam parameters by various diagnostic techniques Determination of positron beam parameters by various diagnostic techniques](/preview/png/5365384.png)
Various diagnostic techniques have been applied at the neutron-induced positron source Munich NEPOMUC in order to determine the positron beam parameters such as intensity, beam shape and energy distribution. The positron beam intensity is determined by the detection of the annihilation radiation of positrons, which annihilate in a movable target. The use of a micro-channel plate (MCP) detector with a CCD-camera allows a direct measurement of the positron beam shape and the lateral resolved intensity distribution. At NEPOMUC a movable MCP-assembly inside the evacuated beam line enables a quick examination of the beam shape during operation. A retarding grid was mounted inside the homogeneous magnetic guiding field in order to determine the distribution of the longitudinal positron momentum, and hence estimate the energy distribution of the positrons.
Journal: Applied Surface Science - Volume 255, Issue 1, 31 October 2008, Pages 50-53