1 / 16

Plan for MRPC Production

Plan for MRPC Production. Yongjie Sun C enter of P article S cience and T echnology U niversity of S cience and T echnology of C hina. Outline . Material Module assembly procedure Performance test Time schedule Summary and outlook.  QC. & QA.  QC. & QA.  QC. & QA.

mircea
Télécharger la présentation

Plan for MRPC Production

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Plan for MRPC Production Yongjie Sun Center of Particle Science and Technology University of Science and Technology of China

  2. Outline • Material • Module assembly procedure • Performance test • Time schedule • Summary and outlook  QC. & QA.  QC. & QA.  QC. & QA. STAR MTD workshop, USTC

  3. 1. Material list Unit: mm • Use the same material at different sites is preferred. • Otherwise, the equivalent must be proved. STAR MTD workshop, USTC

  4. Quality control on the material • Glass • Measure the dimensions (spot check of 20%) • Check the surface quality • Pcb • Dimensions, • the scratch on the strips • Honeycomb • Dimensions, surface quality • Mylar foil: thickness • Fishing line • Dimension check of each coil • Support block: thickness Material with faults will be returned back to factory. STAR MTD workshop, USTC

  5. 2. Assembly procedure Preparations • Material cleaning • Glass washing: by hot steam and alcohol • Honeycomb, mylar, pcb, support block… • Electrode painting • Protect the edge of glass with tape (4 mm) • Applying the graphite painting • Drying for 24 hours • Measure the surface resistivity STAR MTD workshop, USTC

  6. Assembly procedure • adhere the honeycomb to pcb with double-side tape. • put the screws into the bottom pcb for supporting fishing line. STAR MTD workshop, USTC

  7. Assembly procedure • Put the mylar on the surface of pcb. • Put the outer glass (with electrode painting facing outside) on the mylar. • The HV connection was made by adhesive graphite tape at two corners where Mylar has been cut out. STAR MTD workshop, USTC

  8. Assembly procedure • Run the fishing line between the screws and put the inner glass on top of it. • …… STAR MTD workshop, USTC

  9. Assembly procedure • Put the top pcb (with honeycomb, mylar and another outer glass) on. • Put iron bricks on top of the structure and press for more than 12 hours. • Fix the structure with pins along the edges. • Install the support blocks between the pcbs. • Solder the HV wire and signal “pigtail” cable. Protect the HV solder point with CAF4 silicon. STAR MTD workshop, USTC

  10. QA. & QC. during assembly • Check the cleanness of material during the assembly. Blow off the dust with pure N2 if needed. • Measure the thickness between pcbs at 16 points along the edges. The uniformity should be less than 0.3 mm. • Check the connection of HV and signal cable. STAR MTD workshop, USTC

  11. 3. Performance test • Install the module into the gas box and flow the working gas for more than 48 hours. • Training with HV for 48 hours. • Test the leak current and noise rate. • Take the cosmic ray data at 2 different positions for efficiency and time resolution test (24h for each position). • Need all the modules take the cosmic ray test? • 20%: efficiency and time resolution • Others: leak current and noise rate STAR MTD workshop, USTC

  12. Performance standard • Noise rate: <400 Hz/strip • Leak current: < 40 nA • Efficiency: > 90% • Time resolution: < 120 ps (for 90% channels) STAR MTD workshop, USTC

  13. Documents for QA. & QC. • Recording Tables for QA check and test results • Manufacture card • QA check Cards • A web-based database will be available similar to that of STAR TOF. STAR MTD workshop, USTC

  14. 4. Time schedule • 2011.4 – 2011.6  finalizing the design • 2011.6 – 2011.11  20% • 2011.11 – 2012.5  40% • 2012.5 – 2012.11  40% STAR MTD workshop, USTC

  15. 5. Summary • QA. & QC. will be strictly performed during the construction. • Hope continue the success of STAR TOF. • Trouble: lack of FEE board. Thank You！ STAR MTD workshop, USTC

  16. STAR MTD workshop, USTC

More Related