公开(公告)号：US09778384B1

公开(公告)日：2017-10-03

申请号：US15163212

申请日：2016-05-24

Applicant: THERMO FISHER SCIENTIFIC MESSTECHNIK GMBH

Inventor： Michael Iwatschenko-Borho ,  Reinhard Loew

IPC: G01T3/00

CPC classification number: G01T3/00 ,  G01V5/0008

Abstract: A method of verifying the operational status of a neutron detecting device includes at least partially enclosing a neutron detecting device including a neutron detector in a container having outer walls comprising a thermal neutron absorber material, and determining an attenuated neutron count rate of the neutron detecting device. The method then includes removing the neutron detecting device from the container, exposing the neutron detecting device to neutron radiation originating from cosmic ray background, determining an operational neutron count rate of the neutron detecting device, determining a ratio between the operational neutron count rate and the attenuated neutron count rate, and verifying the operational status of the neutron detecting device if the operational neutron count rate is higher than the attenuated neutron count rate by at least a predetermined amount and the ratio is in a predetermined range.

公开(公告)号：US09739899B1

公开(公告)日：2017-08-22

申请号：US15163212

申请日：2016-05-24

Applicant: THERMO FISHER SCIENTIFIC MESSTECHNIK GMBH

Inventor： Michael Iwatschenko-Borho ,  Reinhard Loew

IPC: G01T3/00

Abstract: A method of verifying the operational status of a neutron detecting device includes at least partially enclosing a neutron detecting device including a neutron detector in a container having outer walls comprising a thermal neutron absorber material, and determining an attenuated neutron count rate of the neutron detecting device. The method then includes removing the neutron detecting device from the container, exposing the neutron detecting device to neutron radiation originating from cosmic ray background, determining an operational neutron count rate of the neutron detecting device, determining a ratio between the operational neutron count rate and the attenuated neutron count rate, and verifying the operational status of the neutron detecting device if the operational neutron count rate is higher than the attenuated neutron count rate by at least a predetermined amount and the ratio is in a predetermined range.