Properties of CdTe thin films prepared by hot wall epitaxy

CdTe thin films were grown on different substrates: BaF₂ (111), polished Si (100), SiO₂, bulk CdTe (110) and HgxCd₁₋xTe layers by hot wall epitaxy (HWE). Chosen temperature parame-ters and technological process of thin film fabrication provided the growth rate of about 0.03 mm/min. The current-voltage characteristics and transmission spectra were measured. X-ray diffrac-tion data (XRD) measurements were carried out as well

A novel ultra-short scanning nuclear microprobe: Design and preliminary results

The paper describes an optimized scanning nuclear microprobe (MP) with a new ultra-short (total length of 1.85 m) probe forming system based on a divided Russian quadruplet (DRQ) of magnetic quadrupole lenses. Modern electrostatic accelerators have a comparatively high beam brightness of about 10–25 pA/μm2/mrad2/MeV. This allows the MP proposed to provide a high lateral resolution even with large (1%) parasitic (sextupole and octupole) pole tip field components in all lenses. The features of the design permit the MP operation in the high current and low current modes with a short working distance and inexpensive quadrupole lenses. A new quadrupole doublet design has been developed for the MP. In the present work the calculated features of the new MP are compared with preliminary experimental results obtained with a similar system (total length of 2.3 m) at the INP in Cracow. The new MP is promising for studies of solids or biological samples with high resolutions (0.08–2 μm) in both modes under ambient conditions. A vertical version of the ultra-short MP can be very useful for single ion bombardments of living cells