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Activities in ALICE TOF

Activities in ALICE TOF. Kangnung Univ. Ph D. Student Jin Sook KIM. Contents. 1. Multigap Resistive Plate Chamber R & D (04.2004 ~ 03.2007) (1) 10 gaps MRPC (2) 24 gaps MRPC (3) 6 gaps MRPC

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Activities in ALICE TOF

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  1. Activities in ALICE TOF Kangnung Univ. Ph D. Student Jin Sook KIM Jin Sook KIM

  2. Contents 1. Multigap Resistive Plate Chamber R & D (04.2004 ~ 03.2007) (1) 10 gaps MRPC (2) 24 gaps MRPC (3) 6 gaps MRPC 2. Time-Of-Flight Detector Assembly (04.2007 ~ 04.2008) (1) TOF detector (2) TOF detector assembly 3. Task (05.2008 ~ ) (1) TOF Commissioning (2) ALICE - KOREA FUND Account (3) Research Guide (4) Finish - PH D. Thesis Jin Sook KIM

  3. 1. MRPC R&D (04.2004 ~ 03.2007) Cross-section of the MRPC strip with 10 gas gaps (1) 10 gaps MRPC (TOF detector system) • Consist : 5 gas gaps of 2 stacks • Gap size : 250 m • Active area : 7 cm  120 cm (with 96 pads) • Pad size : 2.5 cm  3.5 cm • Time resolution : ~ 50 ps • Efficiency : ~ 99 % • Article : Aging and rate effects of the Multigap RPC studied at the Gamma Irradiation Facility at CERN. Etc..(5 more) Jin Sook KIM

  4. 1. MRPC R&D (04.2004 ~ 03.2007) Schematic cross-section of 24 gaps MRPC (2) 24 gaps MRPC • Consist : 6 gas gaps of 4 stacks • Gap size : 160 m • Active area : 7 cm  61 cm (with 24 pads ) • Pad size : 2.5 cm  7 cm • Time resolution : ~ 20 ps • Efficiency : ~ 99 % • Article : A 20 ps timing device - a multigap resistive plate chamber with 24 gas gaps Jin Sook KIM

  5. 1. MRPC R&D (04.2004 ~ 03.2007) (3) 6 gaps MRPC (Extreme Energy Events Project) • Goal(EEE Project) : build by high school students and operate at their school in Italy (using cosmic ray) • Consist : 6 gas gaps of 1 stack • Gap size : 300 m • Active area : 82 cm  158 cm (with 24 pads) • Pad size : 2.5 cm  180 cm • Time resolution : ~ 67 ps • Position resolution : ~ 0.84 cm • Article : Performance of a six gap MRPC built for large area coverage. Etc...(3 more) EEE Project poster Jin Sook KIM

  6. 1. MRPC R&D (04.2004 ~ 03.2007) Schematic cross-section of the 6 gaps MRPC Schematic representation of aluminum box Jin Sook KIM

  7. 21 schools (2 years) Jin Sook KIM

  8. 2. TOF Detector Assembly (04.2007~04.2008) The TOF detector in the Space Frame (1) Time-Of-Flight (TOF) Detector • Momentum range : 0.5 GeV/c ~ 2.5 GeV/c • Polar angles : 45<  <135 (full coverage in ) • Cover area : 160 m2 • Inner radius : 3.7 m (from the beam) • Length of the cylinder : 7.2 m • TOF Array : 18 SuperModules • 1 SuperModule : 5 modules • 90 Modules contain : 1638 MRPCs with 157248 readout channels Jin Sook KIM

  9. 2. TOF Detector Assembly (04.2007~04.2008) (2) Time-Of-Flight Detector Assembly • Cable test : Pulse cable, LV cable, HV cable, Amphenol signal cable…. • Magnetic sensible Screw change : FEE card, TRM, Amphenol cable • Participated in 15 SuperModules assembly (all 18 SM) • Installation in SM : FEA Card, Mylar, LV cable, HV cable, Amphenol cable, TRM, LTM, DRM, Cooling bar, DC/DC converter …. Jin Sook KIM

  10. 2. TOF Detector Assembly (04.2007~04.2008) Installation of Amphenol signal cables Construction of SuperModules Jin Sook KIM

  11. 3. Task (05.2008 ~ ) (1) TOF Commissioning • Maintaining and Shift (2) ALICE - KOREA FUND Account • Kangnung Univ. Kunkuk Univ. Pusan Univ. Sejong Univ. Yonsei Univ. (3) Research Guide • Student JeeWon SEO (Kunkuk Univ.) (4) Finish - PH D. Thesis Jin Sook KIM

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