GTAF装置软件系统的设计和测试粒子物理与原子核物理专业毕业论文.docx

兰州大学研究生学位论文Abstract 兰州大学研究生学位论文 Abstract A 4冗total absorption barium fluoride detector GTAF(Gamma-ray Total Absorption Facility)has been designed and built amply by the C眦(the Chinese Institute of Atomic Energy)for accurate measurements of neutron capture cross sections in the keV energy range．TIlis detector has high efficiency for gamma rays．good energy and time resolution．硒e energies of豳e captured neutrons are to be measured by the TOF (time-of-flight)，for the detector has a time resolution of about 600ps．The Capture cross section ratio of two isotopes call be determined accurately with alI the features． The data acquisition of G忑皤bases on a 8 bit Flash KbC(DC 271A、made by Acqiris Co．)，and the useful physicalinformation iS obtained by也e ottline software． Thereby,me key of也is data acquisition system is a suit of suitable sol,rare． Before the design of the data acquisition software，DC 27 1As demo sottware was made use of in Windows XP to fix on the suitable parameters for the further experiment．111e physics thought was designed in data getting software，data compressing software and data storing sothvare，which considered the actual experiments．The software Was tested well by some experiments which we designed． Then the data analysis sof栅are Was designed．The physics thought was also designed in the count of energy spectrum，the count of neutron time of flight and the automatic control of high voltage software．The sothare Was also tested by 80me designed experiments． The results of the tests show that the designed sol,rare was successful．The experimental data Can be compressed accurately．TheⅡand v particles Can be discriminated rightly．The efficiency of this software meets the needs of the further experiments well．The accurate physical information can be obtained from the digital data through the designed software． 啦S work is very important for the G1=舡in the future experiments． Key words：neutron eapture cross section，barium fluoride crystals，Hash ADC， di百t,al data acqu