ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
An improved method of temperature control for electron-paramagnetic-resonance (EPR) spectroscopy is described that reduces the large (1°–2 °C/cm) temperature gradients along the sample associated with gas flow EPR temperature controllers. Circulation of dimethylpolysiloxane through an EPR cavity Dewar using a temperature programmable bath reduces gradients to typically 0.01 °C/cm. Temperature changes within the cavity Dewar can be programmed at rates up to 5 °C/min. This technique provides more precise control of sample temperature and allows the sample to be reset to a specified temperature with an uncertainty of less than 0.1 °C.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1138433
