We have performed a systematic investigation of boron implantation at 30 keV into <100> n-type silicon in the 77 –300 K temperature range and mostly at 9×1015 cm−2 fluence. The analyses have been performed with ion channeling and cross sectional transmission electron microscopy both in as-implanted samples and in samples annealed in vacuum furnace at 500 °C and 850 °C for 30 min. We confirm the impossibility of amorphization at room temperature and the presence of residual damage mainly located at the boron projected range. On the contrary, a continuous amorphous layer can be obtained for implants at 77 K and 193 K; the thickness of the implanted layer is increased by lowering the temperature, at the same time the amorphous-crystalline interface becomes sharper. Sheet resistance measurements performed after isochronal annealing shows an apparent reverse annealing of the dopant only in the sample implanted at 273 K. The striking differences between light and heavy ions observed at room temperature implantation disappears at 77 K and full recovery with no residual damage of the amorphous layer is observed.

KEDR is a general-purpose detector for experiments at the VEPP-4M e+e−-collider in the energy range 2E=2.0–12GeV. All detector subsystems (except the aerogel Cherenkov counters) have been installed into the detector at VEPP-4M. Some preliminary data have been taken in the energy region of the J/Ψ meson. The tuning of the detector and the VEPP-4M collider is in progress. Preliminary results on the detector performance are presented. The future experimental program for the KEDR detector is discussed.

The experiment with the prototype of liquid krypton electromagnetic calorimeter for the KEDR detector is described. The experiment was carried out at the VEPP-4M collider at the tagged photon beam. The tagged photons were obtained in the energy region 50–625 MeV using the ROKK-1M facility. The edges of the bremsstrahlung spectra were used for the energy resolution measurement in the high-energy region up to 4500 MeV. The energy resolution comparable with the resolution of the best crystal calorimeters and the excellent spatial resolution (∼1 mm) have been obtained. The results are in good agreement with the Monte-Carlo simulation.

A description of the liquid krypton calorimeter for the KEDR detector and experimental results on energy and position resolution obtained with prototypes are presented.

Charged particle (π-K) separation in the momentum range 0.5-0.7 GeV/c using a new method of shape analysis of the signal from a liquid krypton (LKr) ionization chamber has been experimentally studied. The detector has been exposed to pions and protons at the T11 test beam at the CERN PS. The shape of the preamplifier output signal was recorded by a waveform digitizer, then it was doubly “differentiated” in order to obtain few dE/dχ measurements inside a 2 cm LKr gap. Results on particle separation at three different energies are presented.

For ion beam adjustment and monitoring the diagnostic system based on Faraday cups was built. This system permits to measure the mass spectra, the size, the current of the ion beam and size the scanned area. The result of measurements are presented.

Charged particle (πK) separation in the momentum range 0.5–0.7 GeV/c using a new method of shape analysis of the signal from a liquid krypton ionization chamber has been studied experimentally. The detector has been exposed to the T11 test beam at CERN PS. The shape of the preamplifier output signal has been recorded by a waveform digitizer and differentiated to obtain multiple measurements of induced current inside a 2 cm gap. Results on particle separation are presented.

Observations have been made of the behaviour of high resistivity silicon and semi-insulating gallium arsenide ionizing radiation detectors after exposure of up to 30 Mrad 60Co photons. Results are presented on leakage current and deep level defects of the substrate material of photon damage devices. These findings have been related to the charge collection efficiency of the detectors.

Charged particle separation by the dE/dx method in a liquid krypton (LKr) ionization chamber has been experimentally studied. The detector has been exposed to pions and protons at the T11 test beam of the CERN PS. Results on particle separation at three different energies are presented. Some results on the performance of monolithic preamplifiers purposely developed to be employed at cryogenic temperatures in calorimetry applications are also presented.

A calorimeter using 30 tons of liquid krypton for the KEDR detector is being constructed. The main effects which determine the energy and space resolution have been studied. An energy resolution of 1.7% at 1.2 GeV was obtained with the prototype. A space resolution of 0.4 mm for relativistic particles has been reached with the prototype.

An investigation has been made into the behaviour of high-purity silicon (HP-Si) during the fabrication of microstrip detectors. The resistivity of the silicon used is 3 k-OMEGA cm. The investigation is centred on standard bipolar processes based on ion implantation. It is found that, comparing the processes used, the best diode characteristics are achieved when a heat treatment at 600-degrees-C is used after the ion-implantation step, whereas the worst results from an implantation and a 900-degrees-C heat treatment. Thus it is shown that if integration of the electronic circuitry and the detector on a single chip is required, then the high-temperature heat treatments must be done before the ion-implantation step needed for detector fabrication.

Results of the experimental measurement of space and energy resolutions of a liquid krypton (LKr) e.m. calorimeter are presented. A prototype has been exposed to a positron test-beam in the energy range 130–1300 MeV at the VEPP-3 storage ring.

An iron-scintillation hodoscope hadron calorimeter made up of independent sections containing four total-absorption counters with a 20 x 20-cm cross-section is described. The energy resolution for hadrons in the range of 4-40 GeV is sigma-E/E = 0.02 + 0.52E-0.5, and the average space resolution is almost-equal-to 2 cm for E = 40 GeV.

The nitrogen pulsed laser monitoring system for the outer electromagnetic calorimeter of the E687 photoproduction experiment, investigating charm and beauty states at the Fermilab Tevatron, is described. The system is reliable, economical and allows a photomultipliers gain stability control as good as 1%.

A Fe-scintillator hodoscopic hadron calorimeter is described. It consists of independent sections, each containing four total absorption counters 20×20 cm2 in cross section. The energy resolution for hadrons in the energy range E = 4–40 GeV is σE/E = 0.02 + 0.52/√E and the mean space resolution is ∼ 2 cm at 40 GeV.