Author/Authors :
Mochizuki، نويسنده , , T. and Kohmura، نويسنده , , Y. and Awaji، نويسنده , , A. and Suzuki، نويسنده , , Y. and Baron، نويسنده , , A. and Tamasaku، نويسنده , , K. and Yabashi، نويسنده , , M. and Yamazaki، نويسنده , , H. and Ishikawa، نويسنده , , T.، نويسنده ,
Abstract :
A cryogenic silicon 1 1 1 cooling system has been developed for the fixed exit double-crystal monochromators. The first crystal is subjected to 76 W/mm2 with a total heat load of 693 W. The cooling of the crystals is contact cooling. Two types of the closed loop liquid nitrogen cooler are being used to cool the crystals. One is the system to cool the outer-surface of the circulating nitrogen pipe with evaporation of liquid nitrogen. The other system uses helium refrigerators to cool the circulating nitrogen, which was developed for the SPring-8 standard undulator beamlines.
Keywords :
cryogenic , Undulator beamline , SPring-8 , Monochromator
