Speaker
Description
RNC "Kurchatov institute" – IHEP actively took part in the creation of the MDT (monitored drift tube) chambers for the ATLAS muon spectrometer at the LHC. Drift tubes of these chambers are housed inside round aluminium tubes with 30 or 15 mm diameter and wall thickness 0.4 mm. Many years of successful operation of the ATLAS detector proves that developed design and production technology of the ATLAS MDT chambers are really good for muon registration tasks. In order to be able to use ATLAS-like MDT chambers for registration also charged hadrons and electrons, we have redesigned the drift tube by such a way that, to diminish amount of passive material (aluminium), its aluminum body is changed to one made of 0.125 mm thickness mylar film aluminized from both sides. Technology of mylar body manufacturing is described: a mylar strip is wrapped around the mandrell of needed diameter, then the long sides of the strip are welded together using ultrasonic welding installation. The pipe made in this way is airtight and has the correct round shape. A single drift tube is self-supported structure withstanding 350 grams tension of 50 microns sense wire without supports and internal overpressure. About 50 drift chambers totally consisting of more than 7’000 mylar drift tubes with length up to 2.5 m are successfully operating in the experimental facilities on 70-GeV proton accelerator of RNC "Kurchatov institute" – IHEP. Some their technical and physical characteristics are presented.
The 10 sq. m muon hodoscope made of drift tubes housed in aluminium body with length 3.7 m and diameter 52 mm is under development and construction in NRC “Kurchatov institute” – IHEP. Totally 768 drift tubes are grouped into 6 identical multilayers, each consisting of two tube layers with parallelly placed tubes. Tube orientation in adjacent multilayers is orthogonal, thus the hodoscope has six X and six Y tube layers. Such hodoscopes can be used for the tasks like monitoring the fluxes of cosmic ray particles or cosmic ray muon tomography of large-scale objects. Expected characteristics and some test results are presented.
| Position | senior scientist |
|---|---|
| Affiliation | NRC "Kurchatov institute" - IHEP |
| Country | Russia |