Cryogenic sample environment on TOSCA

2nd Dynamics of Molecules and Materials

物理学;材料科学

Down, Richard B.E.^1 ; Ramirez-Cuesta, Anibal J.^1 ; Major, Robert A.^1 ; Keeping, Jeff^1 ; Rudi, Svemir^1 ; Kirichek, Oleg^1

ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire

OX11 0QX, United Kingdom^1

关键词: Base temperature;    Cryocoolers;    Down time;    Electricity-consumption;    Sample cooling;    Sample environment;    Single shots;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/554/1/012007/pdf
DOI  :  10.1088/1742-6596/554/1/012007

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

We have developed a new top-loading cryogenic insert that forms part of the integrated cryogenic sample environment for the Tosca spectrometer at the ISIS Facility. New advanced cryo-coolers and optimised design of the cryogenic insert allowed us to dramatically decrease system cool down time from 20 to 7 hours, sample cooling time from 3 hours to 45 minutes and also reduce the base temperature of the insert from 12 K to 4.5 K in the continuous regime and ∼1.5 K in the single shot regime. We have also reduced the number of cold heads from three to two. This lets us save the significant cost of the third cold head maintenance and has cut electricity consumption by ∼30%. A much lower base temperature of 4.5 K has opened new opportunities for molecular spectroscopy studies on Tosca.