کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1833106 | 1526501 | 2006 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Measurement of neutron flux and beam divergence at the cold neutron guide system of the new Munich research reactor FRM-II Measurement of neutron flux and beam divergence at the cold neutron guide system of the new Munich research reactor FRM-II](/preview/png/1833106.png)
A sophisticated neutron guide system has been installed at the new Munich neutron source FRM-II to transport neutrons from the D2 cold neutron source to several instruments, which are situated in a separate neutron guide hall. The guide system takes advantage of supermirror coatings and includes a worldwide unique “twisted” guide for a desired phase space transformation of the neutron beam. During the initial reactor commissioning in summer 2004, the integral and differential neutron flux as well as the distribution of beam divergence at the exit of two representative and the twisted neutron guide were measured using time-of-flight spectroscopy and gold-foil activation. The experimental results can be compared to extensive simulation calculations based on MCNP and McStas. The investigated guides fulfill the expectations of providing high neutron fluxes and reveal good quality with respect to the reflective coatings and the installation precision.
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 560, Issue 2, 10 May 2006, Pages 444–453