Neutralizer for TRIUMF's experiment for measurements of parity non-conservation in francium*

The experiment at TRIUMF for measurements of parity non-conservation (PNC) effects in magneto-optically trapped (MOT) isotopes of francium to test the Standard Model at low energies underwent significant development. In particular, we have overhauled the design of the neutralizer, which catches ionized atoms from the ISAC radioactive beam facility and releases them in neutral form for trapping. We have adopted the design idea, proposed by group of researchers from State University of New York, Stony Brook. It assumed sequential collecting of radioactive species on cold foil, transport them to capture cell and release during short time heating of the foil. We have modified original electric connections to the foil, the way of mounting foil and replaced yttrium foil by zirconium one, more robust. Such modifications allowed us to ensure an operation of the neutralizer through more than 500,000 cycles (this makes possible continuous taking of data during 2 months) with the release about 10\% of embedded atoms per cycle.