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TOTEM

TOTEM. 1. Measurement of the total pp cross-section. 2. Study of elastic proton scattering over a wide range in momentum transfer up to (– t)  10GeV 2. 3. Measurement of the inelastic pp interaction in the forward region. Production status: support structure. service frame.

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TOTEM

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  1. TOTEM 1. Measurement of the total pp cross-section. 2. Study of elastic proton scattering over a wide range in momentum transfer up to (– t)  10GeV2 3. Measurement of the inelastic pp interaction in the forward region.

  2. Production status: support structure service frame chamber frames • Both trusses ready in Genova • Now undergoing small upgrades to try and improve stiffness • All chamber frames in production • 5th layer frame slightly modified in order to solve interference problem with beam pipe support

  3. Production status: chamber components honeycomb panel ground plane gas frame wire-holder cathode plane • Ready: • all components for type 1P, 5P (but 5P will be re-produced); • cathode planes, wire-holders, gas frames for type 1G, 5G, 5P new production; • PCB layout for all cathode planes and wire-holders TOTEM Collaboration Meeting, December 14, 2006

  4. Chamber production at PNPI Measurement of cathode planarity TOTEM Collaboration Meeting, December 14, 2006

  5. Chamber production at PNPI Wiring TOTEM Collaboration Meeting, December 14, 2006

  6. Chamber production at PNPI Test set-up with temporary sealed chamber TOTEM Collaboration Meeting, December 14, 2006

  7. CSC characterization at PNPI 1. Very low dark current (few nA) at “usual” HV values, raise starting from HV= (3.8 - 3.9) kV; 2. After irradiation with strong 137Ce source (about 15 A), current returns to previous values  no self-sustained discharge; 3. Gain uniformity within ±15% throughout whole chamber TOTEM Collaboration Meeting, December 14, 2006

  8. CSC gas gain uniformity

  9. Production database • All results of quality controls and measurements for each chamber are stored in a database. Data will be made available through a web interface: example page (in the works) TOTEM Collaboration Meeting, December 14, 2006

  10. Test beam set-up at CERN Cathode read-out (CFEC) gas mixer LV, PMT HV, cosmics trigger logic CSC #2 CSC #1 Anode read-out (AFEC) Scintillators (+PMT) TOTEM Collaboration Meeting, December 14, 2006

  11. Dark current measurements at CERN • At high voltage values both chambers could clearly “see” the beam TOTEM Collaboration Meeting, December 14, 2006

  12. Production status: CSC components Tentative schedule for component readiness • All material for 1/4 telescope: 15/3/07 • All CSC for 1/4 telescope assembled: 30/4/07 (proposal under discussion) TOTEM Collaboration Meeting, December 14, 2006

  13. Production status: read-out electronics 64-channel CFEC (CMS digitization) VFAT simulator 128-channel CFEC (analog VFAT) TOTEM Collaboration Meeting, December 14, 2006

  14. Эксперимент «Эпикур» • (В.В.Сумачев) • Сделана часть трековой системы на базе ПК с шагом 1мм и апертурой 200*200мм. • ПК успешно прошли испытания на пучке ИТЭФ.

  15. Старение детекторов частиц в интенсивных радиационных полях

  16. Fig.1 Fig.2

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