A trap-based positron beamline for the study of materials

作者：Sullivan J P^*; Roberts J; Weed R W; Went M R; Newman D S; Buckman S J

来源：Measurement Science and Technology, 2010, 21(8): 085702.

DOI：10.1088/0957-0233/21/8/085702

• positron annihilation lifetime spectroscopy
• nanoporosity
• positron beams
• slow positron techniques

We present the design of a new positron beamline for lifetime and Doppler studies of materials. The design is based on the Surko buffer gas trap system and is capable of producing sub-nanosecond pulses with a spot size at the sample of 10 mm. The present timing resolution of approximate to 800 ps allows lifetimes as small as 500 ps to be resolved. Typically count rates are between 100 and 150 counts per second.

• 出版日期2010-8