The new technique was developed in Institute of Physics of Latvian University. It is possible to use the technique in two different versions.

1) To fix a definite heat flux distribution from wall into the cooling flow and gain simultaneously the resulting temperature distribution on the wall.

2) To fix a definite temperature distribution on the wall with a simultaneous registration

of the heat flux distribution which is necessary for keeping this temperature.

The technique provides direct local heat transfer coefficient measurements with definite spatial and time resolution.

The local temperature registration at definite heat flux distribution is of great importance, for example, in situation when a thin wall is heated by radiation from one side and has contact with the cooling flow from other side. The situation is typical for high power facilities. Exploitation of the facilities at temperatures close to critical from material destruction point of view determines the temperature distribution as the item of the first importance. Presence of dead zones in cooling flow or other failures in cooling conditions will have indication in measured by the new method values.

The technique has demonstrated its usefulness in measurements of heat transfer at the beam window in a mockup target for SINQ (reported at 14th Meeting of the International Collaboration on Advanced Neutron Sources, Starved Rock Lodge, Utica Ill., USA June 14-19, 1998.)