Technische Universität München Forschungs-Neutronenquelle Garching, ZWE FRM-II Neutron Radioscopy of a compressor type refrigerator Johannes Brunner, Marton.

Präsentation zum Thema: "Technische Universität München Forschungs-Neutronenquelle Garching, ZWE FRM-II Neutron Radioscopy of a compressor type refrigerator Johannes Brunner, Marton."—  Präsentation transkript:

1 Technische Universität München Forschungs-Neutronenquelle Garching, ZWE FRM-II Neutron Radioscopy of a compressor type refrigerator Johannes Brunner, Marton Balaskó Technische Universität München, Physik E21 KFKI research institute, Budapest, Hungary

2 Technische Universität München Forschungs-Neutronenquelle Garching, ZWE FRM-II In the evaporator the cooling liquid (boiling temperature –30°) evaporates and cooles the inside of the refrigerator. A compressor pumps the gas into the condenser at a pressure of 10 bar. The gas condensates and transfers its energy to the ambient. Through the capillary the cooling liquid passes again to the evaporator system. How does a refrigerator work?

3 Technische Universität München Forschungs-Neutronenquelle Garching, ZWE FRM-II

4 empty refrigerator in action Neutron radiography detector neutrons

5 Technische Universität München Forschungs-Neutronenquelle Garching, ZWE FRM-II Neutron Radiography of the freezer box of the refrigerator time resolution: 1ms spatial resolution: 1.5 mm relative noise: 4% field of view: 120 x120 mm 2 (680 x 680 pixel) neutron flux: 10 8 n/cm 2 s

6 Technische Universität München Forschungs-Neutronenquelle Garching, ZWE FRM-II liquid buffer of the freezer box border of the freezing box tube of the cooling liquid normalized Neutron Radiography of the refrigerator

7 Technische Universität München Forschungs-Neutronenquelle Garching, ZWE FRM-II Determination of the volume of the liquid V...volume of the liquid A...area on the scintillator corresponding to one pixel I... neutron intensity (grey level) of the open beam I 0.. neutron intensity (grey level) in the radiography of the refrigerator µ...attenuation coefficient of the cooling liquid

8 Technische Universität München Forschungs-Neutronenquelle Garching, ZWE FRM-II area of the buffer inspection calibration area

9 Technische Universität München Forschungs-Neutronenquelle Garching, ZWE FRM-II

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