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Proposed Extention of PID with Aerogel

0. 0. 0. 0. 0. 0. 4. 4. 4. 4. 4. 4. 8. 8. 8. 8. 8. 8. Pion-Kaon separation. Kaon-Proton separation. TOF. s ~100 ps. 0 - 2.5. - 5. RICH. n=1.00044 g th~34. 5 - 17. 17 -. Aerogel. n=1.01 g th~8.5. 1 - 5. 5 - 9. Proposed Extention of PID with Aerogel.

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Proposed Extention of PID with Aerogel

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  1. 0 0 0 0 0 0 4 4 4 4 4 4 8 8 8 8 8 8 Pion-Kaon separation Kaon-Protonseparation TOF s~100 ps 0 - 2.5 - 5 RICH n=1.00044 gth~34 5 - 17 17 - Aerogel n=1.01 gth~8.5 1 - 5 5 - 9 Proposed Extention of PID with Aerogel Note ; Aerogel together with TOF can extend the PID capability upto 10 GeV/c (Without TOF, no K-proton separation at < 5 GeV/c)

  2. Good/successful Example of Aerogel • KEK-B Belle Exp. • Low n = 1.01 - 1.03 • 960 modules at Barrel, 228 at Endcap. • Each module ; 12 x 12 x 12 cm3 with 2 FM-PMT • Hydrophobic ! • Stability of performance • ~ 10 - 20 p.e. for many years Journal of Non-Crys.225(1998)369

  3. PHENIX Example of Aerogel azimuthal angle vertex

  4. Proposed Extention of PID with Aerogel

  5. Implication of the index of reflection

  6. Aerogel detector for CBM experiment Aerogel subsystem

  7. Charged particle multiplicities and hit densities Local hit density on the various tracking planes as a function of the radial distance from the beam axis for Au+Au at 25 GeV/u. Charged particle multiplicity for central Au+Au collisions at 25 GeV/u as function of the laboratory polar angle. Result of a simulation using the URQMD transport code .

  8. Segmentation of Aerogel Emission angle, charged particle density, detector surface, pad size and number of cells per aerogel layer. The numbers refer to a central Au+Au collision at 25 GeV/u and an occupancy below 5%.

  9. KEK-BELLE Type Collect scattered photons Non-directional lights Area of photocathode/cell size 2 PMT per cell more expensive Mirror Type Collect direct photons Directional lights Efficient way to get light!? Sophisticated mirror design Easy to get larger cell size 1 PMT per Cell Two Design Concepts Mirror Type Belle Type http://utkhii.px.tsukuba.ac.jp/~highpt/

  10. n = 1.017 R6233 (3”,non-UV) 3 GeV/c pions Belle Type (2) Position Dep. • With Goretex, >25 p.e. obtained everywhere. • In each PMT, exponential behaviour is observed Goretex x http://utkhii.px.tsukuba.ac.jp/~highpt/

  11. n = 1.017 L R6233 (3”,non-UV) 3 GeV/c pions Belle Type (4) Thickness Dep. • Photons proportional to the thickness of the aerogel. • Consistent with; • Angular dependence • No directionality http://utkhii.px.tsukuba.ac.jp/~highpt/

  12. Mirror Type (3) Thickness Dep. • Saturate! • Difficult to get more p.e. • Due to short transmittance L R6233 (3”,non-UV) n = 1.017 Mirror Type 3 GeV/c pions http://utkhii.px.tsukuba.ac.jp/~highpt/

  13. Integration Sphere Aerogel Integration Sphere Type • Intended for Performance of Belle type and Flexibility of the Mirror type. • Empty box, integration sphere, behind the Aerogel. +2 GeV/c http://utkhii.px.tsukuba.ac.jp/~highpt/

  14. Integration Sphere Type Results • As many as 20 p.e. at the center. • Less position dep. than Belle type. +2 GeV/c +2 GeV/c http://utkhii.px.tsukuba.ac.jp/~highpt/

  15. R&D Items; Evaluate Prototypes Belle Type, Mirror Type, Integration Sphere Type Evaluate Reflectors Goretex, tyvek, etc Evaluate PMT’s Hamamatsu, Russian Evaluate Aerogel’s Matsushita, Novosibirsk Summary of Aerogel R&D

  16. Aerogel Signal for protons and pions +2 GeV/c n=1.018 • Clear separation of protons and pions observed. Pions Deuteron Proton Protons K Pion PID by TOF successful http://utkhii.px.tsukuba.ac.jp/~highpt/

  17. 0 0 0 0 0 0 4 4 4 4 4 4 8 8 8 8 8 8 Pion-Kaon separation Kaon-Protonseparation TOF s~100 ps 0 - 2.5 - 5 RICH n=1.00044 gth~34 5 - 17 17 - Aerogel n=1.01 gth~8.5 1 - 5 5 - 9 Proposed Extention of PID with Aerogel Note ; Aerogel together with TOF can extend the PID capability upto 10 GeV/c (Without TOF, no K-proton separation at < 5 GeV/c)

  18. INJECTOR Ion sources LINAC LU-20 SYNCHROPHASOTRON Experimental Hall 205 MV-1 F-3 fromNUCLOTRON SLON Polarimeter “ALPOM” Polarimeter F3Pz(+)=0.59±0.06Pz(-)=-0.63±0.06 RUN 24(Dec. 2002) Polarlzatlon Internal target & setup for experiments at NUCLOTRON MV-2 He-LiqueFier KCU-1600

  19. The NUCLOTRON beams INTENSITY (Particles per cycle) Beam 2002 YEAR 2003 YEAR 2005 p 31010 11011 21011 d 2.31010 51010 11011 4He 8 108 5109 21010 7Li 8 108 2109 2109 10B 2.3107 12C 1109 3109 21010 24Mg 2.0 107 3108 5108 40Ar ~ 106 3107 2108 56Fe 1106 1107 84Kr 1103 1105 5106 131Xe - 2106 d 3107108 3108 3109 The Nuclotron Beams *) first test in 1994

  20. LHE Accelerator Facility Beam lines layout in experimental hall 205

  21. Nuclotron • RUN 22(632 hours) • INTENSITY OF THE EXTERNAL BEAM OF MAGNESIUM IONS WAS INCREASED UP TO 108 • RUN 23(704 hours) • IONS OF ARGON WERE ACCELERATED FOR THE FIRST TIME WITH THE INTENSITY OF 1.4∙106 AND Ек1 GeV/u. • DURATION OF EXTACTED BEAM WAS INCREASED UP TO 1.9 s.

  22. New Result: Beam Spill - 5 s (March 2003) ACCELERATOR CYCLE - 8 s BEAM DUTY FACTOR - 0.61

  23. The main parameters of the spectrometer are:- acceptance 50 - 80 mstr% ;- momentum resolution P/P~0.5% ;- angles of particle detection = 200-900;- momentum range 0.3 - 2.0 GeV/c .

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