1 / 27

Time of Flight L/R detector

Time of Flight L/R detector. 2*891 scintillators & PMT (3.4 x 2.3 x 6,7,8)cm 3 HV System Trigger System Start Counter Signal Read Out Discriminators, TDCs, QDCs Control while data taking Calibration and TOF client. Principles of operation. Start signal from S1.

dasha
Download Presentation

Time of Flight L/R detector

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. Time of Flight L/R detector

  2. 2*891 scintillators & PMT (3.4 x 2.3 x 6,7,8)cm3 HV System Trigger System Start Counter Signal Read Out Discriminators, TDCs, QDCs Control while data taking Calibration and TOF client

  3. Principles of operation Start signal from S1 Stop signal from scintillator

  4. Current system topology Caen 5 Caen 1 Caen 5 Caen 1

  5. SY527 Main menu C.A.E.N. SY527 V3.17 Crate 01 M A I N M E N U Display Display/Modify channels Protections Set/Reset password Crate Connect a new crate Map Crate map Kill Kill all channels Alarms Reset alarms Status Select type of alarm Format Reformat EEPROM Quit Abandon program Select item

  6. SY527 Data display C.A.E.N. SY527 V3.04 A753 GROUP00 Ch_En is: On V0-SEL I0-SEL Crate 05 Page 1 * Channel HVmax Vmon Imon V0set I0set Pw Status Ch# CHANNEL07 2713 2104.00 0004.90 mA 2100.00 0013.00 mA On 3.07 CHANNEL08 2713 2153.20 0005.22 mA 2150.00 0013.00 mA On 3.08 CHANNEL00 2680 2490.20 0005.08 mA 2500.00 0013.00 mA On 5.00 CHANNEL01 2680 2540.00 0005.27 mA 2550.00 0013.00 mA On 5.01 CHANNEL02 2680 2490.00 0005.17 mA 2500.00 0013.00 mA On 5.02 CHANNEL03 2680 2190.00 0004.83 mA 2200.00 0013.00 mA On 5.03 CHANNEL04 2680 1990.80 0005.02 mA 2000.00 0013.00 mA On 5.04 CHANNEL05 2680 2240.00 0004.51 mA 2250.00 0013.00 mA On 5.05 CHANNEL06 2680 2540.20 0004.87 mA 2550.00 0013.00 mA On 5.06 CHANNEL07 2680 2490.00 0005.05 mA 2500.00 0013.00 mA On 5.07 CHANNEL08 2680 2540.00 0004.16 mA 2550.00 0013.00 mA On 5.08 CHANNEL00 2668 2502.20 0004.84 mA 2500.00 0013.00 mA On 7.00 CHANNEL01 2668 2203.00 0005.13 mA 2200.00 0013.00 mA On 7.01 CHANNEL02 2668 2102.60 0004.92 mA 2100.00 0013.00 mA On 7.02 CHANNEL03 2668 2302.40 0005.54 mA 2300.00 0013.00 mA On 7.03 CHANNEL04 2668 2152.60 0005.44 mA 2150.00 0013.00 mA On 7.04 Quit Change Update Next Prev More Switch V/Isel

  7. TOF-L/R in 2010 run

  8. 2010 Run summary

  9. Current system topology Caen 5 Caen 1 Caen 5 Caen 1

  10. Planned system topology

  11. Objectives • Improve connection reliability with crates in the pit 2) Enable remote monitoring of HV parameters 3) Enable remote control of HV parameters 4) Enable possibility for HV status logging 5) Allow possibility to send warnings to expert in case of malfunction

  12. RS232 mux candidates Remote Access Terminal Server Price: 840EUR !!! Distrelec Price ~400USD Have to be order from US Price: 420 CHF at Distrelec Deliver time: ? Techmania – stack empty Tech Mania 35CHF Topd 65CHF

  13. DELOCK OHC computers, Topd ~ 90CHF Not as elegant as Terminal Servers, but cheap!

  14. Hardware

  15. Aging problem • Communication problem persist with TOF-R crate 4! • Problems are typical aging problem (bad contact between connectors, chips and sockets etc…) • Decide to open Crate 4 in very bad working conditions • Communication restored, but we lose 2 HV distributors!

  16. QDC distribution - before

  17. QDC distribution - after

  18. TDC – single bad pixel

  19. TDC – multi bad pixel

  20. Before: 34 bad pixel (random) After: 30 (random) Before: 34 bad pixel (random) After: 30 (random) Before: 34 bad pixel (random) After: 30 (random) ToF-R bad pixels Before: 34 single bad pixel (random) After: 30 single bad pixel (random)

  21. ToF-R bad pixels Additional 59 bad pixel (4 already in random!) Crate 4, distributors 3 and 6 – 37 new bad pixel Crate 1, distributor 5 – 22 new bad pixel (HV Off!)

  22. Summary At the end of 2011 proton run ToF-L : 87 (bad pixel) (9.7%) + 17 (suspicious) (1.9%) - ------------------- 104 (11.6%) Before intervention: ToF-R: 34 (random bad pixel) After intervention: ToF-R: 30 (random bad pixel) + 37 (due to the intervention, Crate 4) + 22 (unknown reason, Crate 1) - ------------------- 89 (10.0%)

  23. Conclusion • Control and monitoring hardware upgrade successful! • For ION run, remote control, monitoring and data logging of HV status will be possible • Problems: urgently needs for spare parts for CAEN HV system, TDC and QDC • Without spare parts, the future will not be bright for ToF-LR!

  24. THE END

  25. TOF-L TDC sample

  26. TOF-L bad pixels • 87 bad pixels (count 0 in TDC) 1, 3, 14, 42, 54, 61, 63, 64, 102, 129, 133, 137, 138, 142, 154, 156, 157, 160, 163, 179, 194, 199, 216, 221, 226, 243, 250, 253, 287, 318, 320, 329, 353, 358, 379, 380, 390, 410, 411, 413, 453, 460, 469, 480, 501, 506, 529, 530, 545, 564, 570, 588, 595, 599, 627, 635, 639, 653, 660, 662, 663, 670, 681, 683, 711, 743, 748, 757, 766, 767, 771, 773, 774, 783, 787, 790, 793, 800, 805, 819, 824, 840, 861, 868, 878, 879, 883 • 17 suspicious pixels (count 1 in TDC)85, 140, 169, 376, 395, 424, 451, 549, 633, 634, 660, 720, 736, 779, 784, 819, 889

More Related