MOESSBAUER CRYOSTAT WITH MOBILE ABSORBENT OF GAMMA RADIATION Russian patent published in 2009 - IPC G01T1/36 

FIELD: physics.

SUBSTANCE: holder of sample 8 is joined to modulator 9 using two parallel tractions executed in the form of muffled pipes 10, 11 which are located coaxially in basic pipelines of gas stream 12, 13, anchored on case 3 in cooling chamber 2 supplied with electrical heater of liquid coolant 6. At vibrational motion the holder of the sample 8 is cooled by stream of volatilised nitrogen in the cooling chamber 2 and arrives in ring backlashes between tractions 10, 11 and walls of pipelines 12, 13. The gas stream, transiting through dilatational cracks 19 in the case of 18 ring electrical heaters 16, 17 cools tractions 10, 11 and leaves the nozzles 39, 40 outside. Part of gas stream is pulled out through through the holes 21, 22 in vacuity of pipes 9, 10 that causes turbulence of the stream and leads to heat exchange magnification in heating area of Moessbauer radiation 14. Temperature sensing devices 23, 24, 25 and electrical heaters 6, 16, 17 are connected to the cryostat controller. The control of temperature of heating of radiant 14 and coolings of the holder of the sample 8 is carried out by data units of resistance 23, 24, 25. It is as a result excluded freezing of the mobile tractions 10, 11, source of gamma radiation 14 at a motion of the cooled holder of the sample 8.

EFFECT: maintenance of low temperature of the explored mobile sample by stream of volatilised coolant in a wide gamut of temperatures with high accuracy.

4 cl, 4 dwg