Portal de Periódicos da CAPES

Indigenous Development of Gamma Compensated Boron Lined Neutron Chambers

2003; NISCAIR; Volume: 62; Issue: 11 Linguagem: Inglês

0975-1084

Mary Alex, D.N. Prasad, K. R. Prasad, S. K. Kataria, S. N. Athavale, A. L. Pappachan, Chidambaram Subramanian, A. K. Grover, Anil Suri,

Radiation Detection and Scintillator Technologies

reacto rs us in g in expe ns ive and easil y a va il abl e po lyeth e r eth er keto ne (PEE K) in sul atin g mate ri a l as an alt e rn ative to a lu mina. The c hamber has o vera ll d iam of 8 .Sc m an d 3 1.S e m le ngth. 0 .7g o f indi genous ly deve lo ped 4 0.S per ce nt e nric hed bo ro n is d ip coated on th e e lectrodes. The chamber has neutro n sens it ivit y of S.5fAln v and an average y-co mpe nsati o n facto r of 4 per cent. The pe rformance o f the ne utron detecto r is co mpared wi th a simil ar detecto r wi th alumina d iscs. The use o f sui tab ly s haped PEEK insert s at the e nds o f th e e lec trodes e li minates extra-came ra l vo lu me. This result s in mo re uniform e lectri c fIeld and we ll -de fi ned sensiti ve vo lume between th e e lectrodes. As a result th e c hamber with PEE K insert requires SOY to saturate as co mpared to 100Y in th e case o f th e c hamber with alumina d iscs whe n ex posed to the rmal neutron fl u x of 10xnv. T he variati o n in y-compe nsati o n fa cto r red uces from ± 9 to ± 4 .S per ce nt between 300 to 3 1S 0 R/ h. T he ind igeno us developme nt o f th e detecto r he lps a vo id lo ng-term depende nce on imports and a lso sa ves substant ial amount o f fo re ign exchange.