An ESR Cavity for Performing Ultimate Sensitive ESR Spin Concentration Measurements up to 1300.deg.K

Abstract

A modification of a Varian TE 104 dual sample cavity is described. With this modified cavity, sample temperatures of up to 1300 K are reached without loss in sensitivity. The performance of this cavity allows one to measure the temperature dependence of very weak broad ( Delta H approximately=1 kG) ESR signals. Moreover, it is possible to carry out spin concentration measurements reliably. The ideas underlying this modification can be used in general for making type TE 104 or TE 102 cavities suitable for sensitive ESR measurements at high temperatures