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Proposal for TESLA beam test zone at IHEP ( Protvino )

Proposal for TESLA beam test zone at IHEP ( Protvino ). Vladimir Obraztsov Institute for High Energy Physics Protvino Moscow region, Russia. Content. 1. TESLA requirements 2. IHEP accelerator parameters 3. Beam line parameters 4. Beam tests for energy resolution

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Proposal for TESLA beam test zone at IHEP ( Protvino )

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  1. Proposalfor TESLA beam test zoneat IHEP ( Protvino ) Vladimir Obraztsov Institute for High Energy Physics Protvino Moscow region, Russia V. Obraztsov - Prague ECFA/DESY Workshop

  2. Content 1. TESLA requirements 2. IHEP accelerator parameters 3. Beam line parameters 4. Beam tests for energy resolution 5. Beam tests for energy flow analysis 6. Test zone arrangement 7. Time schedule 8. DAQ 9. Conclusion V. Obraztsov - Prague ECFA/DESY Workshop

  3. TESLA requirements 1. Calorimetric response for individual particles ( to test options and tune the simulation ) - beams: h,e, - momentum range: (1 - 50) GeV/c - different incident angles - statistics: 106 per point, ~102 points 2. JET separation (to test/tune energy flow reconstruction) - different combinations of e, h, ,  with an open angles  6 mrad V. Obraztsov - Prague ECFA/DESY Workshop

  4. IHEP accelerator parameters - IHEP accelerator is 70 GeV proton synchrotron - cycle time - 10 s - spill time - 1.8 s - intensity ~ 11013 p/cycle - RF structure: bunch length – 40 ns, bunch spacing – 160 ns - beams are from extracted protons and internal targets V. Obraztsov - Prague ECFA/DESY Workshop

  5. Electron beam Beam line parameters - Beam line #2B from internal target is used - Negative beam - Momentum range (1-45) GeV/c V. Obraztsov - Prague ECFA/DESY Workshop

  6. Electron beam Beam line parameters Beam resolution itself is not good enough to satisfy TESLA ECAL requirements V. Obraztsov - Prague ECFA/DESY Workshop

  7. Electron beam Beam line parameters Beam tagging system (BTS) to improve resolution ( BTeV PbWO4 coll., hep-ex/0208012 ) V. Obraztsov - Prague ECFA/DESY Workshop

  8. Electron beam Beam line parameters - Beam tagging system allows to keep beam resolution ~10 times better than expected ECAL resolution - Beam spot,  ~ 3 cm V. Obraztsov - Prague ECFA/DESY Workshop

  9. Electron beam Beam line parameters from PbWO4 array Admixtures of h- and -allow to measure calorimetric response simultaneously for e-, h- and -using Cherenkov counter V. Obraztsov - Prague ECFA/DESY Workshop

  10. Hadron beam Beam line parameters - Beam line #2B from internal target is used - Negative beam - Beam spot,  ~ 2.5 cm V. Obraztsov - Prague ECFA/DESY Workshop

  11. Beam line parameters Hadron beam • Momentum range (33-45) GeV/c • Beam composition Intensity for p/p = 1% V. Obraztsov - Prague ECFA/DESY Workshop

  12. Beam tests for energy resolution V. Obraztsov - Prague ECFA/DESY Workshop

  13. Beam tests for energy resolution Set up for energy resolution measurements - Minimal incident angle, min~ 630, due to leakage. - Movable platform is needed for different incident angles. Different parts of set up should be adjusted too. V. Obraztsov - Prague ECFA/DESY Workshop

  14. Beam tests for energy flow analysis Set up for EFLOW - full TESLA sector from Si to  catcher - in magnetic field - expected acceptance tgxz   0.07 tgyz   0.20 -requires to reconsider ECAL,HCAL,  ID lateral dimensions V. Obraztsov - Prague ECFA/DESY Workshop

  15. Beam tests for energy flow analysis Magnet parameters V. Obraztsov - Prague ECFA/DESY Workshop

  16. Beam tests for energy flow analysis Possible measurements - inelastic  - N interactions at (40-55) GeV/c with at least 2 particles within the set up acceptance - - p  0 n,  - p   n reactions ( ~(10-3-10-4) of tot) to study the ECAL  separation ,min = 2mm/Em V. Obraztsov - Prague ECFA/DESY Workshop

  17. Beam tests for energy flow analysis ,  ± multiplicity in acceptance  -p at 55 GeV/c  ± + ± mult2 ~80% evts V. Obraztsov - Prague ECFA/DESY Workshop

  18. Beam tests for energy flow analysis Pair angles in acceptance  -p at 55 GeV/c  V. Obraztsov - Prague ECFA/DESY Workshop

  19. Arrangement V. Obraztsov - Prague ECFA/DESY Workshop

  20. Beam detector system Arrangement / beam Set up S1S4 , A1 , A2 - scintillation counters PC1 , PC2 - proportional chambers H1 , H2 - scintillation hodoscopes C1 , C2 - threshold cherenkov counters D1 , D2 - differential cherenkov counters STOF - time-of-flight scintillation counter V. Obraztsov - Prague ECFA/DESY Workshop

  21. Possible time schedule V. Obraztsov - Prague ECFA/DESY Workshop

  22. DAQ V. Obraztsov - Prague ECFA/DESY Workshop

  23. Conclusion 1. IHEP is ideal site for TESLA beam tests. All tests can be done in one beam line 2. Energy resolution tests with beam particles e- : (1-45) GeV/c h- : (1-55) GeV/c - : (1-55) GeV/c 3. Energy flow tests with additional target Sector of full Tesla detector can be tested 4. Beam time will be IHEP contribution for Tesla R&D V. Obraztsov - Prague ECFA/DESY Workshop

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