The series of high-rate and high spatial resolution gaseous detectors for diffraction studies and X-ray imaging at SR beam developed in the Budker INP is reviewed. The detectors are based on wire and ...micro-pattern gas technologies and provide spatial resolution at the level of 0.1mm together with rate capability in the range from 10MHz per detector to ∼1010Hz/channel.
The cross section of the process e+ e−→ KS KL π0 has been studied with the CMD-3 detector at the VEPP-2000 electron-positron collider in the center-of-mass energy range from 1.1 to 2 GeV. Preliminary ...results on the total cross section of the process are presented.
The tagging system (TS) of the KEDR detector is designed for study of two-photon interactions on the VEPP-4M electron-positron collider. The upgrade of the TS was completed and 8 triple-GEM detectors ...were added to the system with a single detector sensitive area up to 250*100 mu m super(2), a spatial resolution in the beam orbit plane close to 70 mu m and a small angle stereo readout providing a resolution of around 200 mu m in perpendicular direction. The triple-GEM detectors were included into the KEDR DAQ system, and since the beginning of the 2010-2011 season they have demonstrated stable operation at a gas gain of 20000-40000 and efficiency of 95-97%. The new detectors will allow performing background suppression and improving the energy resolution of the system.
Status of several projects under development in Budker INP with GEM-based detectors for synchrotron radiation imaging and particle tracking is reviewed. These are namely: the detector for imaging of ...explosions(DIMEX) at SR beam, the detector for WAXS studies at SR beam (OD4), the triple-GEM detectors for the tagging system of KEDR experiment at VEPP-4M collider and the triple-GEM detectors for the tagging system of Deuteron experiment at VEPP-3 storage ring.
The process e+ e−→ K+ K−π0 has been studied in the center-of-mass energy range from 1.2 to 2 GeV using a 80.6 pb−1 data sample collected with the CMD-3 detector at the electron-positron collider ...VEPP-2000. Preliminary results of the cross-section measurement are presented.
Using the KEDR detector at the VEPP-4M e+e− collider, we have measured the values of Ruds and R at seven points of the center-of-mass energy between 3.12 and 3.72 GeV. The total achieved accuracy is ...about or better than 3.3% at most of energy points with a systematic uncertainty of about 2.1%. At the moment it is the most accurate measurement of R(s) in this energy range.
Recent results on various cross sections of e+e−→hadrons obtained with the SND and CMD3 detectors at the VEPP-2000 collider in the energy range up to 2 GeV are presented. The final states studied ...include e+e−→π+π−, K+K−, π+π−π0, π+π−π0π0, ηπ+π−, ωη, ηγ and others. The measured cross sections are important since they contribute to the total hadronic cross section, muon g-2 and parameters of excited vector mesons. The nucleon-antinucleon production at threshold was also studied.
Gaseous Electron Multiplied(GEM)-based position sensitive detectors are used and planned to be used in several experiments in the Budker Institute of Nuclear Physics. At present eight triple-GEM ...detectors are installed in the KEDR experiment at the VEPP-4M collider where they operate in the tagging system measuring momenta of electrons and positrons after two-photon interactions. Several triple-GEM detectors made of very light components are planned to be installed in the DEUTERON experiment at the VEPP-3 storage ring. The first detector of this type is assembled and tested with dedicated electronics. We plan also to build large cylindrical GEM-based detector with two layers of cylindrical triple-GEMs of 60 cm inner diameter. This project is now discussed for the Cryogenic Magnetic Detector (CMD-3) at the VEPP-2000 collider.
Cascaded Gas Electron Multipliers (GEM) allow to construct detectors for charge particles tracking with high spatial resolution and rate capability. Such detectors can withstand high background ...fluxes up to 10 super(5) particles/mm super(2)/s and determine track coordinates with precision of 50-70 micron. These remarkable features of GEM govern the use of this technology in a number of experiments at the Budker Institute of Nuclear Physics. In this paper the current status and progress in the performance studies and the development of the detectors for the tagging system of the KEDR experiment at the VEPP-4M collider and for the DEUTERON facility at the VEPP-3 storage ring will be covered. The new proposals for the upgrade of tracking and trigger system of the CMD-3 detector, the tracking detectors for the extracted beam from the VEPP-4M storage ring and the tracking detectors for the polarimeter at the VEPP-4M with the use of GEM technology will be discussed.
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