Initial Results From a CdTe High-Energy X-ray Detector on a TEM
Energy Dispersive X-ray analysis (EDX) in the transmission electron microscope (TEM) is a well-established technique for thin films. The higher accelerating voltage and small analysis volume allow experiments not be possible in the SEM. However, there are instances where characteristic X-rays from different elements are not resolvable using conventional Si based detectors. Detection of higher energy X-rays from these elements may circumvent the overlap issues. CdTe and CdZnTe detectors have been used for a number of years in nuclear and gamma-ray spectroscopy [1]. The energy response of a typical 1mm thick detector is shown in Figure 1 [2]. These experiments were intended to see if the ability of a CdTe X-ray detector to see higher energy photons would provide the ability to see and resolve high energy X-ray peaks in the TEM.
Kurchatov synchrotron radiation source: Status report
Abstract Project parameters of the big storage ring are practically reached. At the project energy of 2.5 GeV stored current reached 72 mA. Three SR beamlines are installed on the bending magnets of the small storage ring with an electron energy of 450 MeV. Three experimental stations are installed in VUV experimental hall. Three front ends of X-ray beamline are installed on the big storage ring. One X-ray beamline is out of biological shielding of the big ring. Construction of the big experimental hall is almost completed. A status report on the first part of the active proposals is given.
Synchrotron radiation parameters registration using beam cross-section image detector: The first experiments
Abstract Possibilities of non-destructive recording of synchrotron radiation (SR) beam parameters using Beam Cross-section Image Detector (BCID), which was designed before for the diagnostic of charged beams, have been estimated. The basic principles of the work of this detector are described. A developed detector for visualization of synchrotron radiation beam cross-section image is described briefly. The first tests of this detector were provided on SR beam at LURE (Orsay). Some of the results of these tests are described and discussed. The results obtained show the possibility of the use of ionization crossection detector for a prompt beam cross-section observation. Computer data processing of beam cross-section TV image make it possible to obtain size, position and shift of gravity centre of the SR beam, angle of beam downfall on the target continuously.