Digital pulse-timing technique for the neutron detector array NEDA
2015 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 775, 71-76 p.Article in journal (Refereed) Published
A new digital pulse-timing algorithm, to be used with the future neutron detector array NEDA, has been developed and tested. The time resolution of four 5 in diameter photomultiplier tubes (XP4512, R4144, R11833-100, and ET9390-kb), coupled to a cylindrical 5 in by 5 in BC501A liquict scintillator detector was measured by employing digital sampling electronics and a constant fraction discriminator (CFD) algorithm. The zero crossing of the CM algorithm was obtained with a cubic spline interpolation, which was continuous up to the second derivative. The performance of the algorithm was studied at sampling rates of 500 MS/s and 200 MS/s. The time resolution obtained with the digital electronics was compared to the values acquired with a standard analog CFD. The result of this comparison shows that the time resolution from the analog and the digital measurements at 500 MS/s and at 200 MS/s are within 15% for all the tested photomultiplier tubes.
Place, publisher, year, edition, pages
2015. Vol. 775, 71-76 p.
Digital timing, Constant fraction discriminator, Liquid scintillator, BC501A, Neutron detector, NEDA
Other Physics Topics
IdentifiersURN: urn:nbn:se:uu:diva-245338DOI: 10.1016/j.nima.2014.12.002ISI: 000348040900011OAI: oai:DiVA.org:uu-245338DiVA: diva2:792243