Optimising Foil Selection for Neutron Activation Systems

O. Wong, R. Smith, C. R. Nobs, A. M. Bruce

Research output: Contribution to journalArticlepeer-review


Neutron spectrum unfolding using activation foils is currently the primary technique planned for measuring the neutron energy spectrum at the first wall of power-generating fusion reactors. Room for improvement in the effectiveness of current foil selection was identified, and a program produced to select foils procedurally in order to maximise the accuracy of the unfolding procedure. Using Kullback–Leibler Divergence to quantify the accuracy, the spectrum unfolded by the procedurally selected set of foils is found to be more accurate than the spectrum unfolded by a set of foils used in the literature.

Original languageEnglish
Article number12
Number of pages8
JournalJournal of Fusion Energy
Issue number1
Publication statusPublished - 14 Jun 2022

Bibliographical note

This work was part funded by the EPSRC Grant [Grant Number EP/T012250/1], STFC [Grant Number ST/P003982/1 and ST/V001086/1], and the U.S. Department of Energy, Office of Science, Nuclear Physics program [Grant Number DE-FG02-94ER40870].


  • Neutron activation system
  • Neutron spectrum unfolding


Dive into the research topics of 'Optimising Foil Selection for Neutron Activation Systems'. Together they form a unique fingerprint.

Cite this