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HIRFL-CSR 的强子物理讨论

HIRFL-CSR 的强子物理讨论. Hushan Xu 2 Zhigang Xiao 1. 1 Institute of Modern Physics, CAS, Lanzhou 2 Department of Physics, Tsinghua Univ., Beijing. 1 HIRFL-CSR 状态 2 HIRFL-CSR 计划的强子物理 3 HPLUS 的现状 4 To Do List. North. SFC: up to 10 AMeV SSC: up to 100 AMeV. SSC. Building 2#. SFC. CSRe.

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HIRFL-CSR 的强子物理讨论

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  1. HIRFL-CSR的强子物理讨论 Hushan Xu 2 Zhigang Xiao 1 1 Institute of Modern Physics, CAS, Lanzhou 2 Department of Physics, Tsinghua Univ., Beijing 1 HIRFL-CSR 状态 2 HIRFL-CSR计划的强子物理 3 HPLUS的现状 4 To Do List

  2. North SFC: up to 10 AMeV SSC: up to 100 AMeV SSC Building 2# SFC CSRe Building 6# CSRm CSRm: 1.1 AGeV(12C6+), 2.8 GeV(p) CSRe: 0.76 AGeV (12C6+) HPLUS 1 Status of the HIRFL-CSR complex

  3. Ions: 12C6+， 36Ar18+，129Xe27+ (Not yet proton ) Energy: 1GeV/u for C & Ar in CSRm Intensity in CSRm: 10mA (7109) for C-600MeV/u in CSRm 1.2mA (4108) for Ar-368MeV/u in CSRm 0.5mA (1108) for Xe-235MeV/u in CSRm Slow-extraction: 1.2s for Ar-368MeV/u 3.0s for 12C4+-300 MeV/u Commissioning of HIRFL-CSR

  4. 2 Hadron Physics program planned at HIRFL-CSR • Hadron spectroscopy / Symmetry / Spin/isospin physics

  5. 2 Concept design of HPLUS(Hadron Physics LanzhoU Spectrometer) Some basics related to the design • Luminosity estimation: 1031/s/cm-1; • Event Rate estimation: 105/s {50mb} / 10/s {1b} • Total Space length: ~3.5m • Life time of beam estimation: 10~1000s Some Fast Simulations Results • Charged particles distribution: >85% in 90, For  and N* channels, >90% charged products dominated within 30; • TPC only insufficient for PID and p measurement, >5 single forward tracking detectors required; • For /K identification at <1.5 GeV, Flight path length up to 2.5m+; • >1000 blocks of CsI crystals needed, totally 2m3;

  6. Concept design of HPLUS

  7. 3 Status of HPLUS 3.1 MC Simulation 3.2 Detector components R&D

  8. MC Simulation started HPLUS  IO External TPC FTD MC Truth Kernel Phys. list Field Det. Constr. Det. On/off Det. Response Track gene/store HIT & Digi. Hit gen/store Data Store IO definition Det. Constr. IO implem. Det. Response Gmake env. HIT & DIGI Gmake imple. Data Store XML writer Det. Install. Def GDML writer TPC Det. Response FTD Det. Response  HIT & Digi Data Store Event Generator Pluto++/Chan. G4 Interface G4 based simulation framework

  9. pp elastic ds/d in c.m. pppp pdpp(n)‏ P in Lab  in Lab Event Generator = Pluto++ + Single Channel simu.

  10. Feasibility Study of ppppppK+K in FTD pppN*(K+) pppp*(K+K-)

  11. FTD Construction in Geant4

  12. Track Finding and momentum reconstruction Ene. Depos. Hit Elect. Drfit Digi. Tracking+Rescon.

  13. Invariant mass spectrum of K+ K-。

  14. Wiring machine MWDC prototype FTD: MWDC Prototype • Able to assemble large area MWDC • Various MWDC Prototypes have been made and the performance have been tested.

  15. drift spec. Hit multiplicity Layer multiplicity Total Hit Multi. MWDC tested by cosmic

  16. Gain VS. HV (85%Ar+15%CO2) Eff. VS. HV Tracking residual  VS. Residual MWDC tested by cosmic Position Resolution =210m

  17. TPC Prototype （R&D in Tsinghua Univ. ）

  18. Spatial Resolution and Working Gas TPC Test results (provided by Yulan Li from THU) Transverse resolution with Ar:CF4:i-C4H10=94:3:3 gas Width of pad response with Ar:CF4:i-C4H10=94:3:3 gas Transverse resolution with P10 gas at B = 1.0 T Transverse resolution with Ar:CF4:i-C4H10=94:3:3 gas at 1 T Resolution achieved: 100 m @ 1T & 10 cm drift distance

  19. EMC Calorimeter R&D CsI crystal grown in IMP. Performance ensured.

  20. CsI single unit tested with heavy ion beam S.C.H 1×1 inch IMP3  2×2 inch IMP1 1×1 inch IMP2 1×1 inch 101010 sample coupled to APD 101010 sample coupled to PD 202020 sample coupled to PD Tested at IMP

  21. R&D of the target LDPT (in collaboration with Duke) • Pellet • LDPT Pellet (in collaboration with Upp. & COSY )

  22. To do List 1 Simulation 2 Concept Design Report Version0 3 Detector R&D ( 要得到资助，可能需要将工作做到一定程度 要将工作做到一定程度，需要形成合作 我们需要建立一个合作组)

  23. Full Simulation 1 Platform (Root and G4-Based) （THU &IMP） 2 TPC (构建／信号／数字化／重建) 3 TOF (构建／信号／数字化／重建) 4 EMC (构建／信号／数字化／重建) 5 FTD (构建／信号／数字化／重建 ) （THU） 6 I/O and integration

  24. CD0 Writing • 1 Physics Interest 1). 2). 3). …(统计条件，相空间分布) • 2 条件和初步设计（Tsinghua） • 3 模拟现状和计划（Tsinghua） • 4 子探测器预研计划与进展 • 5 Collaboration List   and Responsibility

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