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03-1-1020-95/2005
Priority:1
Status: Extended

High-Acceptance Toroidal Spectrometer HADES.
R & D of New Particle Detectors

Leader:    Yu.V. Zanevsky
Scientific Programme:
  1. A high-acceptance high-resolution spectrometer for electron pair detection in heavy-ion collisions is under construction at SIS (Darmstadt). The physics motivation includes an investigation of in-medium modification of light vector mesons ( , , ) as well as a study of the dilepton continium below the /-region in hot dense hadronic matter. The main detector components include a ring-imaging Cherenkov detector (RICH) for electron identification, a superconducting magnet with toroidal geometry, a drift chamber system for tracking before and behind the field region and an electron trigger array with time-of-flight measurement and shower detection. The spectrometer has a geometric acceptance of almost 50% for the electron pair and a mass resolution of 0.8% in the /-region. Special attention will be paid to the investigation of different aspects of dilepton and photon radiation from a hot and dense nuclear medium, dilepton sources in nuclear interactions, asymmetry and anisotropy of dielectrons and photons. High-resolution low-mass multilayer drift chambers for the central part of the HADES spectrometer were constructed at VBLHE JINR. The analogue readout electronics with a high density of integration and low power dissipation was developed at VBLHE; mass production of this electronics was carried out for the drift chamber system of the spectrometer. The work on track-finding software in the drift chamber system is in progress.
  2. Research and development of transition radiation detectors and X-ray detectors with a high spatial resolution.


Expected main results in 2003:
List of Activities
  Activity or project Spokespersons
Status
1. HADES
2. Transition radiation detectors
and X-ray detectors with a high spatial resolution.
Yu.V. Zanevsky
Preparation

Collaboration   
Country or international
organization
City Institute or Laboratory
Czech Republic Prague IMMCh ASCR
Rez NRI
Germany Darmstadt GSI
Frankfurt/Main JWGU
Giessen JLU
Heidelberg RKU
Munich TUM
Rossendorf FZR
Italy Catania INFN LNS
Milan Univ.
Hungary Debrecen Univ.
JINR Dubna BLTP
FLNP
LIT
Poland Cracow JU
Russia Moscow SSC-ITEP
CIC RAS
MEPhI
Sweden Stockholm Univ.

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