[en] This work details the method of obtaining time-integrated images of laser--plasma x-ray emission using charge-injection devices (CIDs), as has been demonstrated on the University of Rochester's 60-beam UV OMEGA laser facility [T. R. Boehly , Opt. Commun. 133, 495 (1997)]. The CID has an architecture similar to a charge-coupled device. The differences make them more resistant to radiation damage and, therefore, more appropriate for some application in laser--plasma x-ray imaging. CID-recorded images have been obtained with x-ray pinhole cameras, x-ray microscopes, x-ray spectrometers, and monochromatic x-ray imaging systems. Simultaneous images obtained on these systems with calibrated x-ray film have enabled determination of the absolute detection efficiency of the CIDs in the energy range from 2 to 8 keV

[en] The Moessbauer spectroscopic measurements have been carried out on (Fe_1-xRu_x)₂P (x=0 and 0.02) at T=5 and 300 K. The magnetic moment in Fe₂P in the ferromagnetically ordered state has been estimated to be about 0.76 μ_B and 1.97 μ_B for Fe site I and II, respectively at T=5 K. For (Fe_0.98Ru_0.02)₂P, however, it is found that there are three sites I, II, and III, ordering antiferromagnetically, and the magnetic moments are estimated to be about 0.66 μ_B and 1.89 μ_B for Fe(I) and Fe(II), respectively

[en] The RARF (RIKEN Accelerator Research Facility) has an accelerator complex consisting of the K540 RIKEN Ring Cyclotron (RRC) as a main accelerator and its two injectors; variable frequency RIKEN heavy-ion linac (RILAC) and K70 AVF Cyclotron (AVF). The RRC together with the AVF and the RILAC have provided routinely a beam time of more than 4400 hours through a year since 1993. Present status of the RARF operation and recent advances are reported. (author)

[en] This paper reports on superconducting coupling nature at grain boundaries in Bi₂Sr₂CaCu₂O_x glass-ceramics which consist mainly of the low-T_c phase first examined by measuring superconducting properties and temperature or ac field dependence of ac complex susceptibility. It was found from the ac loss peaks that superconducting coupling at grain boundaries was basically characterized by three types of weak links. The weak-link behaviors at grain boundaries depended strongly on cooling conditions after annealing and annealing time and temperature. Particularly, it was found that the weak links at grain boundaries were improved by prolonged annealing at 840 degrees C. The furnace-cooled glass-ceramics obtained by annealing at 820 degrees or 840 degrees C for about 200 h exhibited a critical transport current density (77 K, zero magnetic field) of about 200 A/cm²

[en] The dissolution amount of Zn plate was 0.058 mg/cm² in the non-magnetically treated solution, and was 0.059 mg/cm² in the magnetically treated solution after 24 hour of immersion. The magnetic treatment had no effect to corrosion of Zn plate as pH on surface was not recognized the difference. The addition of Zn(II) ion in the solution was prepared to the effects of corrosion and dissolution of Fe. The regularity was not obtained the effect of the magnetic treatment on the dissolution of Fe plate

[en] RIKEN Heavy Ion Linac, RILAC, has been operating for ten years with use of a PIG ion source and has been used for studies in atomic physics, solid state physics, radiation and nuclear chemistry, and others. It also is used as an injector for RIKEN Ring Cyclotron. To get higher charge-state ion beams and the large number of ion species, we replaced the PIG ion source by an ECR ion source on the 500 kV injector in the last year. We bought the ECR ion source, NEOMAFIOS, from C.E.N.G. in France. This ECR ion source should be an ideal source for RILAC injector because it is compact and it consumes less than 10 kW electric power. With this improvement the maximum energies of ions having a mass number larger than 16 are expected about to be twice as large as previously obtained. The performance of this ECR ion source and the beam acceleration are described. (author)

[en] In this paper we present methods for the miniaturization of superconducting filters. We consider two designs of seventh-order bandpass Chebyshev filters based on lumped elements and a novel quasi-lumped element resonator. In both designs the area of the filters, with a central frequency of 2-5 GHz, is less than 1.2 mm². Such small filters can be readily integrated on a single board for multi-channel microwave control of superconducting qubits. The filters have been experimentally tested and the results are compared with simulations. The miniaturization resulted in parasitic coupling between resonators and within each resonator that affected primarily the stopband and increased the bandwidth. The severity of the error depends on the design in particular, and was less sensitive when a groundplane was used under the inductances of the resonators. The best performance was reached for the quasi-lumped filter with central frequency of 4.45 GHz, quality factor of 40 and 50 dB stopband

[en] The Ag-coated superconducting Bi₂Sr₂CaCu₂O_x glass-ceramic fibers were successfully prepared. The glass fibers with a length of 50 cm, a width of 100--200 μm, and a thickness of about 20 μm were first drawn from glass plates with a thickness of 1 mm and then silver pastes were coated on the smooth surface of glass fibers. The Ag-coated glass fibers were converted into superconductors after annealing at temperatures of 820--860 degree C. The main crystalline phase in the glass-ceramic fibers was the superconducting low T_c phase. The Ag-coated glass-ceramic fibers obtained by annealing at 840 degree C for 5 h in air exhibited superconductivity with a T_c(zero)=70 K and a critical current density (60 K, zero magnetic field) of more than 40 A/cm²

[en] Primary aortoduodenal fistula (ADF) is a direct communication between the abdominal aorta and the gastrointestinal tract without any previous vascular intervention and represents a rare but critical cause of repeated and massive gastrointestinal bleeding. Primary ADF often occurs as a result of atherosclerotic aneurysm and infection, but ADF involving a normal-size aorta is rare; furthermore, ADF related to radiation therapy is extremely rare. We present the case of a 56-year-old man with a history of bowel obstruction due to radiation enteritis who was admitted with severe hematemesis and hemorrhagic shock. Gastroduodenal endoscopy and contrast-enhanced computed tomography findings were unremarkable. Aortoduodenal fistula was suspected based on the diffuse calcification of the abdominal aorta confined to the radiation field and the presence of an aortoduodenal communication on angiography. Endovascular repair with a s tent graft seemed to be a safer option than open surgery and was suited to the rapid control of bleeding from ADF because of the patients unstable hemodynamic state and the presence of intestinal adhesions. The fistula was successfully sealed by endovascular stent graft placement. Hematemesis did not recur postoperatively and anemia gradually improved. The patient died from pneumonia 33 days later

[en] ⁵⁷Fe Moessbauer measurements have been performed for Fe-Ta-N films deposited by reactive sputtering method. The effect of annealing at various temperatures on the phase decomposition and the magnetic structure of these films has been investigated. For the as-deposited specimen, the ⁵⁷Fe Moessbauer spectra consist of a paramagnetic component and a magnetically-split component. After annealing at 773 K, the spectra are dominated by a magnetically-split component having a sharp absorption line. (orig.)