At the FAIR (Facility for Antiproton and Ion Research, Darmstadt, Germany) accelerator complex under construction, one of the key experiments is the PANDA experiment. The main field of the PANDA spectrometer is provided by a superconducting solenoid. The energy of the magnetic field stored in a superconducting solenoid reaches 22 MJ at an operating current of 5100 A. In the case of the transition of the superconducting cable used for the solenoid winding into a resistive state, the safe extraction of stored energy is required to protect the magnet. The energy extraction system proposed by the authors provides energy dissipation inside the external dump resistor, and not in the section of the superconducting cable that has passed into resistive state, while preventing its damage. The most critical elements of the energy extraction system are the current breaker, with the help of which the dump resistor is introduced into the power circuit of the superconducting solenoid, and the dump resistor itself. A modernized three-phase circuit breaker was chosen as current breaker. A unique design of the energy extraction system including dump resistor with a low parasitic inductance has been developed.

A time-of-flight detector based on microchannel plates (MCP) is under development. The main goal is the creation of a radiation hard large area detector providing similar to 10 ps time resolution for single charged particle in strong magnetic field. Conceptually, the detector consists of Cherenkov radiator covered with semitransparent photocathode followed by a chevron pair of MCPs. The detector design and the status of the development are reported.

BINP presents the design of a 2T cryogenic solenoid for the PANDA detector at the Facility for Antiproton and Ion Research (FAIR). The paper describes the design of the cold mass, calculations of mechanical and thermal loads of the solenoid.

A time-of-flight detector based on microchannel plates (MCP) is under development. The main goal of this work is the creation of a radiation hard large area detector providing 10 ps time resolution in strong magnetic field. The conceptual detector design is described in details.

The beam energy measurement system is of great importance for both BEPC-II accelerator and BES-III detector. The system is based on measuring the energies of Compton back-scattered photons. In order to meet the requirements of data taking and improve the measurement accuracy, the system has continued to be upgraded, which involves the updating of laser and optics subsystems, replacement of a view-port of the laser to the vacuum insertion subsystem, the use of an electric cooling system for a high purity germanium detector, and improvement of the data acquisition and processing subsystem. The upgrade system guarantees the smooth and efficient measurement of beam energy at BEPC-II and enables accurate offline energy values for further physics analysis at BES-III.

The system for insertion of a laser beam into the vacuum chamber of high-energy storage ring is described. The main part of the system is the high-vacuum viewport for the IR radiation, based on ZnSe or GaAs crystals. The design of the viewports is presented.

The beam energy measurement system for the VEPP-2000 electron-positron collider is described. The method of Compton backscattering of CO laser photons on the electron beam is used. The relative systematic uncertainty of the beam energy determination is estimated as 6 x 10(-5). It was obtained through comparison of the results of the beam energy measurements using the Compton backscattering and resonance depolarization methods. (C) 2014 Elsevier B.V. All rights reserved.

Vacuum chamber for the beam energy measurement system based on the Compton backscattering method is presented. The main elements of the chamber are GaAs entrance viewport and a copper mirror. The viewport design provides baking out of the vacuum chamber up to 250 °C. To produce the viewport, an original technology based on brazing GaAs plate by lead has been developed. The vacuum chambers were installed at the BEPC-II and VEPP-4 M colliders. After installation the residual gas pressure is about 10-10 Torr.

The beam energy measurement system (BEMS) for the upgraded Beijing electron-positron collider BEPC-II is described. The system is based on measuring the energies of Compton back-scattered photons. The relative systematic uncertainty of the electron and positron beam energy determination is estimated as 2 x 10(-5). The relative uncertainty of the beam's energy spread is about 6%. (C) 2011 Elsevier B.V. All rights reserved.

The BEPC-II collider beam energy calibration system is discussed. The system is based on the Compton backscattering method. The expected precision of the electron and positron beam energy epsilon determination is delta epsilon/epsilon approximate to 3 . 10(-5).

Streak camera with spiral scanning will allow measuring a single light signal with duration up to ten nanoseconds with sub-picoseconds time resolution during all signal duration by means of using the whole 2D surface of screen. For creation such a streak camera it is necessary to have a high density of photoelectron beam in order to have small beam size and enough quantity of electrons in the resolution element. But the beam density increasing is limited by different effects including temperature relaxation. Quite the contrary in typical streak cameras the beam density is reduced down to single photoelectrons in the resolution element and then the number of electrons is integrated either on recurring signal or along streak. Another way is the significant increase of electrons energy. This idea has been realized in the streak camera with photoelectron energy up to 90kV and circular scanning by means of high quality RF cavity. The results of testing of this streak camera are presented. The design of streak camera with spiral scanning is presented.

For effective work of preinjector VEPP-5 it is necessary 3 ns bunch with charge 1*10**10 electrons from termogun compress to bunch with 40 ps duration on the positron target. A new streak-camera with RF cavity on the main linac frequency is used. Streak-camera with circle scanning allows see 350 ps single light signal with sub-ps resolution. An additional slow scanning can obtain the trochoidal scanning. Thus one can see with picoseconds resolution and with less then 1psec synchronization the train of ten bunches which are spacing by 350psec. The results of worked streak-camera with RF-cavity for circle scanning are presented.

The review of the SND results of the e(+)e(-) --> pi(+)pi(-)pi(0) process study in the energy range roots- = 0.42 - 1.38 GeV at VEPP-2M collider, based on about 2 x 10(6) selected events, is presented. The total cross section, parameters of the p,omega,phi resonances, and omega',omega" states were obtained. It was found that ppi and omegapi(0) intermediate states describe the reaction dynamics. The experimental data cannot be described by a sum of only omega,phi,omega' and omega" resonances contributions. This can be interpreted as a manifestation of the p --> 3pi decay, suppressed by G-parity, with relative probability B(p --> 3pi) = (1.01 +/-(0.54)(0.36) +/- 0.034) x 10(-4).

For effective work of preinjector VEPP-5 it is necessary 3 ns bunch with charge 1*10**10 electrons from termogun compress to bunch with 40 ps duration on the positron target. A new streak-camera with RF cavity on the main linac frequency is used. Streak-camera with circle scanning allows see 350 ps single light signal with sub-ps resolution. An additional slow scanning can obtain the trochoidal scanning. Thus one can see with picoseconds resolution and with less then 1psec synchronization the train of ten bunches which are spacing by 350psec. The results of worked streak-camera with RF-cavity for circle scanning are presented.

Results of the study of the e(+)e(-) --> pi(0)gamma process with SND detector at VEPP-2M collider in the c.m.s. energy range,roots = 0.60-0.97 GeV are presented. Using 36513 selected events, corresponding to a total integrated luminosity of 3.4 pb(-1), the e(+)e(-) --> pi(0)gamma cross section was measured. The energy dependence of the cross section was analyzed in the framework of the vector meson dominance model. The data are well described by a sum of phi, omega, rho --> pi(0)gamma decay contributions with measured decay probabilities: Br(omega --> pi(0)gamma) = (9.34 +/- 0.15 +/- 0.31)% and Br(rho(0) --> pi(0)gamma) = (5.15 +/- 1.16 +/- 0.73) x 10(-4). The rho-omega relative interference phase is phi(rhoomega) = (-10.2 +/- 6.5 +/- 2.5) degrees. (C) 2003 Published by Elsevier Science B.V.

The results of testing of several photomultiplier tubes with microchannel plates (MCPTs) and phototriodes developed at the Budker Institute of Nuclear Physics in 1997-2002 are presented. The MCPTs and-several types of multianode devices were designed and tested. The counting rate capability of the devices, the dependence of the tube gain versus magnetic field and the cross talks between readout channels were studied.The development of streak camera with circular deflection of an electron beam for detecting fast light pulses is started. The design and the results of testing the streak camera are presented. (C) 2003 Elsevier Science B.V. All rights reserved.

The cross sections of the e+e−→π+π−π +π−, e+e−→π+π−π0π 0, and e+e−→ωπ→ π+π−π 0π0 processes, as well as the e+e−→π+π−π0π0 process with subtracted contribution of the ωπ intermediate state, are measured in experiments with a spherical neutral detector on the VEPP-2M collider in the energy range 0.98–1.38 GeV. About 41 000 events of the e+e−→π+π−π+π − process and more than 54 000 events of the e+e−→π+π −π0π0 process have been selected in experiment. The statistical error in determining the cross section is 2–20%, while the systematic error is 7 and 8%.

The results of tests of 1'' vacuum phototriodes in a magnetic field up to 4.5 T are presented. It was found that output amplitude decreases by about 6 % per tesla in the magnetic field range from 2.0 to 4.0 T. For devices with an anode mesh pitch of 16$\mu$m, the output amplitude at 4.0 T is 30 % lower than that at zero field.

The results of testing of several photomultiplier tubes with microchannel plates (MCP PMT) and phototriodes developed in the Budker Institute of Nuclear Physics in 1997–2002 are presented. The study includes single anode MCP PMTs and several types of multianode tubes. The results on counting rate capabilities, dependence of the tube gain on external magnetic field and cross-talks between individual channels are presented. The design of a sealed gas photomultiplier is described.