Calibration of CMS calorimeters with LHC proton beam deflected by crystal

Calibration of the forward CMS hadron calorimeters in situ by the LHC beam is proposed. Simulations show that bent crystal channeling technique is feasible at the LHC, and report the experience of IHEP Protvino in bending 70 GeV protons by 9 degrees (150 mrad) during 10 years in 1994-2004 experiments. Practical realization of calibration scheme based on simulations and previous experience is proposed.Comment: Presented at CARE-HHH-APD Mini-Workshop on Crystal Collimation in Hadron Storage Rings (CC-2005), Geneva, Switzerland, 7-8 Mar 200

Development of the hybrid dome and research of its behavior under load

The hybrid dome consists of a bearer frame, covered with a flexible fabric membrane. The frame comprises rigid upper beams and cable network at the bottom. Several embodiments of the dome are examined and the best one is selected. The process of prestressing of dome’s elements is considered. The analysis of reliability of exploitation of the dome is performed

Analysis of pneumatic envelopes arranged on rectangular plan

Rectangular pneumatic envelopes, made of a polymer film, are considered. The envelopes are subjected to non-uniform external loads, which consist of symmetric and inverse-symmetric parts. The functional dependence describing the envelope’s surface is given. The improved technique for obtaining geometrical parameters of envelopes is offered. It uses the differential equation of equilibrium, the method of least squares and the linearization procedure with Taylor series. The results of the work may be used for taking into account physical non-linear properties of polymer membranes, for estimation of changes of air-pressure in pneumatic cushions, for selection the most appropriate embodiment of the cushion from a set of possible variants

Development of the hybrid dome and research of its behavior under load

The hybrid dome consists of a bearer frame, covered with a flexible fabric membrane. The frame comprises rigid upper beams and cable network at the bottom. Several embodiments of the dome are examined and the best one is selected. The process of prestressing of dome’s elements is considered. The analysis of reliability of exploitation of the dome is performed