MPD concept, structure & plans V.Kekelidze, Round Table IV, Dubna 1 11 September 2009

2 The MultiPurpose Detector (MPD) is proposed for a study of hot and dense baryonic matter in collisions of heavy ions over mass range A=1-197 at a centre-of-mass energy √s NN = 4-11 GeV ( +79 Au). The MPD experiment is foreseen to be carried out at a future JINR accelerator complex facility NICA which is designed for averaged luminosity L = cm -2 s September 2009V.Kekelidze, Round Table IV Introduction

Main goal – search for mixed phase and critical end-point 3 Proposed tasks  Yield & spectra of particles (charged, neutrals, strange / multi )  Study of the K/π (strangeness to entropy) ratio  Anisotropic collective flow  Femtoscopy (momentum correlations)  e-m probes  P (CP) - asymmetry Other studies with MPD  Dense cold matter at NICA 11 September 2009 V.Kekelidze, Round Table IV11 September 2009

4 Physics motivation LE-RHIC scan LE-RHIC scan NICA energy range NICA energy range 11 September 2009V.Kekelidze, Round Table IV

 Joint Institute for Nuclear Research  Institute for Nuclear Research, RAS, RF  Bogolyubov Institute for Theoretical Physics, NAS, Ukraine  Nuclear Physics Institute of MSU, RF  Institute Theoretical & Experimental Physics, RF  St.Petersburg State University, RF  Institute of Applied Physics, AS, Moldova  Institute for Nuclear Research & Nuclear Energy BAS, Sofia, Bulgaria  Institute for Scintillation Materials, Kharkov, Ukraine  State Enterprise Scientific & Technology Research Institute for Apparatus construction, Kharkov, Ukraine  Particle Physics Center of Belarusian State University 5 Members of the Collaboration  JINR ~ 100  Other institutes 39 Institutions  JINR  10 institutes from 5 countries The Collaboration is permanently growing New members – are welcome 11 September 2009V.Kekelidze, Round Table IV MPD Collaboration

6 Progress of the MPD project preparation The first MPD concept was presented in LoI issued in February it is now modified The first version of MPD CDR was issued in June 2009 Now the version 0.6 is available It will be developed until ~ mid of September 2009V.Kekelidze, Round Table IV Editorial board  Golovatyuk V.  Kekelidze V.  Madigozhin D.  Murin Yu.  Nikitin V.  Rogachevsky O.  Toneev V. Referee board  Gorbunov N.  Kolesnikov V.  Meshkov I.  Olchevski A.  Potrebenikov Yu.  Topilin N.  Tyapkin I.  Zanevsky Yu.

7 CDR preparation Responsibilities  Physics coordination - Sisakian A., Sorin A., Toneev V.  Technical coordinator - Golovatyuk V.  Software, MC & tracking coordinator- Rogachevsky O. 11 September 2009V.Kekelidze, Round Table IV  Kolesnikov V.I.  Krumshtein Z.V.  Lednicky R.  Lokhtin I.P.  Malinina L.V.  Musulmanbekov G.J.  Murin Yu.A.  Nikitin V.A.  Olchevski A.G.  Stavinskiy A.V.  Toneev V.D.  Tyapkin I.A. Main contributors to the physics tasks

8 Subdetector groups  TPC - Yu.Zanevski et. al.  ECal - I.Tyapkin, A.Olchevsky et.al.  TOF- V.Golovatyuk et.al.  Straw wheels- V.Peshekhonov et.al.  ZCal - A.Kurepin et.al.  CPC- Yu.Kiryushin et.al.  FFD- V.Yurevich et.al.  BBC- R.Zulkarneev et.al.  DAQ- V.Slepnev, S.Bazylev et.al.  IT- Yu.Murin, V.Nikitin et.al. 11 September 2009V.Kekelidze, Round Table IV The CBM-MPD STS consortium … in IT silicon module development is well progressing

9 Charge multiplicity distribution in central Au-Au collisions 11 September 2009V.Kekelidze, Round Table IV

10 Geant-4 simulation Au-Au collision at 9 GeV/n for three regions of pseudorapidity |η| < < η < 2.65 η > September 2009V.Kekelidze, Round Table IV Particle momenta in the MPD

11 The detector to explore phase diagram of strongly interacting matter in a high track multiplicity environment  has to cover a phase space: |η|<2, p = GeV/c  be functional at high interaction rates (several kHz),  comprise high efficiency & good particle identification capabilities  based on the recent detector developments  to be of reasonable cost. Requirements to the Detector 11 September 2009V.Kekelidze, Round Table IV

MPD general view Central Detector - CD & two Forward Spectrometers (optional) – FS-A & FS-B September 2009V.Kekelidze, Round Table IV

11 September V.Kekelidze, Round Table IV CD dimension

11 September V.Kekelidze, Round Table IV TPC ECal ZDC TOF RPC EC Tracker MPD scheme 3 stages of putting into operation 2-nd stage IT,EC-subdetectors 3-d stage F-spectrometers (optional ?) 1-st stage barrel part (TPC, Ecal, TOF) + ZDC, BBC, S-SC, …

CD η-regions 11 September V.Kekelidze, Round Table IV

CD parts in η-regions 11 September V.Kekelidze, Round Table IV

TPC new approach 17  New electronics providing the rate of ~ 6 kHz  Max transparency (low X 0) of end cap structure  Spatial resolution σz = 1 mm, σx = 0.6 mm 11 September 2009V.Kekelidze, Round Table IV

TPC: Read-Out electronics requirement and design September 2009V.Kekelidze, Round Table IV

Conceptual layout of IT September 2009V.Kekelidze, Round Table IV Strip pitch = 100 mkm Stereo angle = 15 0 provides σ xy = 23μm and σ z =120 μm

Neutral kaon & hyperon detection September 2009V.Kekelidze, Round Table IV Neutral kaon & Lambda decays invariant mass reconstruction V 0 reconstruction

Particle identification TPC using ionization TPC (ionization) & TPC+TOF (mass reconstruction) September 2009V.Kekelidze, Round Table IV

New design of straw wheels September 2009V.Kekelidze, Round Table IV

23 11 September 2009V.Kekelidze, Round Table IV ECAL – “ shashlyk” type modules with APD readout

Cathode pad chamber tracker September 2009V.Kekelidze, Round Table IV based on Rochacell 31HF foam

Integration and services September 2009V.Kekelidze, Round Table IV

Installation sequence & support structure Solenoid + ECal ECal Solenoid + ECal +TOF Solenoid + ECal +TOF+TPC 26 rails 11 September 2009V.Kekelidze, Round Table IV

CD assembly completed (without IT) Rails Solenoid ECa l TOF September 2009V.Kekelidze, Round Table IV TPC

Timetable of the MPD works 28 the first colliding beams for MPD is expected in September 2009V.Kekelidze, Round Table IV

 The version 0.6 of CDR is available  MPD main features (advantages)  The CDR development is continued  R&D activity is in progress  The MPD Collaboration is growing Summary  capability to work at high luminosity  high rate of event recording  hermeticity - towards 4  geometry  smooth scan in - relevant energy region - A-number - b-parameter September 2009V.Kekelidze, Round Table IV

30 “The one who knows his limits never fails...”...From the book "Dao De Jing" (author Lao Tzu)... VI-V century BC Thank you! 11 September 2009V.Kekelidze, Round Table IV