0000000000255734
AUTHOR
A. Kiseleva
showing 3 related works from this author
Development of an array of calorimetric low-temperature detectors for heavy ion physics
2006
Abstract Calorimetric low-temperature detectors have been investigated for several applications in heavy ion physics within the last 15 years. The detectors used consist of sapphire absorbers of 2×3×0.33 mm 3 and superconducting aluminum transition edge sensors operated at T ≈1.5 K. To fully exploit the potential of such detectors for heavy ion physics, a detector array is developed. For this purpose, a specially adapted 4 He bath cryostat with a base temperature of 1.2 K, which allows an active detector area of 30×80 mm 2 , was constructed. As different detectors have different transition temperatures, each detector pixel has to be adjusted to its specific working point and temperature sta…
First application of calorimetric low-temperature detectors in accelerator mass spectrometry
2004
Abstract For the first time, calorimetric low-temperature detectors were applied in accelerator mass spectrometry, a well-known method for determination of very small isotope ratios with high sensitivity. The aim of the experiment was to determine with high accuracy the isotope ratio of 236U/238U for several samples of natural uranium, 236U being known as a sensitive monitor for neutron flux. Measurements were performed at the VERA tandem accelerator at Vienna, Austria. The detectors consist of sapphire absorbers and superconducting transition edge thermometers operated at T≈ 1.5 K. The relative energy resolution obtained for 17.39 MeV 238U is ΔE/E=4–9×10−3, depending on the experimental co…
Noise analysis for calorimetric low-temperature detectors for heavy ions
2004
The energy resolution of calorimetric low-temperature detectors for heavy ions has been analyzed. It is shown that the contribution of base line noise is small. The energy resolution is determined by intrinsic fluctuations of the detector signal. An incomplete energy thermalization during the stopping process of the heavy ion, the dependence of signal shape on impact position and fluctuations of the Al-TES thermometer response are considered as main sources of detector line broadening. Test measurements with 5 MeV α-particles are presented.