Hydrostatic Level Sensors as High Precision Ground Motion Instrumentation for Tevatron and Other Energy Frontier Accelerators

Particle accelerators pushed the limits of our knowledge in search of the answers to most fundamental questions about micro-world and our Universe. In these pursuits, accelerators progressed to higher and higher energies and particle beam intensities as well as increasingly smaller and smaller beam sizes. As the result, modern existing and planned energy frontier accelerators demand very tight tolerances on alignment and stability of their elements: magnets, accelerating cavities, vacuum chambers, etc. In this article we describe the instruments developed for and used in such accelerators as Fermilab's Tevatron (FNAL, Batavia, IL USA) and for the studies toward an International Linear Collider (ILC). The instrumentation includes Hydrostatic Level Sensors (HLS) for very low frequency measurements. We present design features of the sensors, outline their technical parameters, describe test and calibration procedures and discuss different regimes of operation. Experimental results of the ground motion measurements with these detectors will be presented in subsequent paper

PERIOPERATIVE PREVENTION OF RESPIRATORY COMPLICATIONS IN PATIENTS WITH SURGERY FORMS OF LUNG CANCER

The aim of the study was to develop and apply a perioperative complex of preventive measures aimed at reducing the incidence of respiratory complications in patients with operable forms of lung cancer. Materials and methods. The study has been conducted between September 2016 and January 2018. 103 patients with operable forms of lung cancer were treated, with anatomic resection of the lungs or pneumonectomy in the conditions of the oncology department of the Tomsk Regional Oncology Center. All patients in the perioperative period used a developed set of measures aimed at preventing the development of respiratory complications. A retrospective analysis was made of the case histories of 66 patients underwent treatment in cancer department of Tomsk Regional Oncology Center between 2014 and 2016, all patients underwent surgical treatment for lung cancer using standard prevention methods. We compared the incidence and structure of respiratory complications in a group of patients using the developed complex and in the retrospective control group. Results. The analysis of groups of patients revealed statistically significant differences in the number and structure of complications. In patients who developed the prophylactic complex at the stages of treatment, respiratory complications were registered in 4 (3.9 %) cases, while in the retrospective control group, respiratory complications developed in 8 (12.1 %) patients. According to the complications structure, the results also vary, in the group with the developed complex, none of the patients registered postoperative pneumonia while in the control group pneumonia developed in 5 cases and was the cause of death in 3 patients. Conclusion. The use of the developed complex in patients with oncopulmonological profile significantly reduces the incidence of respiratory complications in the postoperative period