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Outline

Outline. MUCH Layout and Pad sizes Estimation of Readout Channels Readout PCBs for GEMs PCB for FEB with two NXYTERS Estimation of Readout PCBs, GEM PCBs, FEBS,ROCs Estimation of LV/HV Channels. MUCH Layout with GEM for SIS 300. Readout channels-1. R2. R1.

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Outline

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  1. Outline MUCH Layout and Pad sizes Estimation of Readout Channels Readout PCBs for GEMs PCB for FEB with two NXYTERS Estimation of Readout PCBs, GEM PCBs, FEBS,ROCs Estimation of LV/HV Channels

  2. MUCH Layout with GEM for SIS 300

  3. Readout channels-1 R2 R1 ONE LAYER A is area(shaded) for Electronics Area A = π (R2*R2 – R1*R1) Pad sizes of 4 sq mm for station 1(layers1, 2, 3) Pad sizes of 10 sq mm for stations 2 and 3, Number of channels for station1 =287500 Number of channels stations 2, 3 it is 232500. Total =520000

  4. Readout channels –2 Pad size 5 sq mm: Number of Readout channels for station1 =184,000 (52800+61200+70000) Pad size =10mm: Number of channels for station 2,3 =232,500 Total is 184000+ 232500=416500 35% Reduction Compared to 4 sq mm and 10 sq mm pads Pad sizes of 4.5 sq mm and 9 sq mm: Reduction of 21% compared to pad size of 4 sq mm for station 1 Increase of 23 % in channels for 9 sq mm compared to 10 sq mm for station 2,3 Total no of readout channels=226889+287036=513925 2 % reduction in total compared to 4 sq mm and 10 sq mm pads See below.

  5. Readout PCB –Modular design 300 pin connector for signals 1.27 mm pitch 4 layer PCB with 256 pads. 32* 8 array. Size is 135 *33.4 sq m Read by one FEB(Front End Board) One FEB has 2 N-XYTER chips each reading 128 channels Can be duplicated to larger arrays. 0.2 mm gap between pads 4 such blocks to have an array of 1024 channels Top Copper Inner 1 layer Inner2 layer Bottom copper

  6. Readout PCB –Modular design PCB Size is 135 *135 sq mm To be read by 4 FEBS. 32*32 array =1024 pads Bottom copper GND Plane Top copper 4 NO -300 Pin connectors Inner layers not shown

  7. FEB with 2 N-XYTERS Chip1 300 pin connector ADC Chip2 ROC Connector 3D View PCB size =112*31 sq mm Top Copper Bottom copper

  8. Chamber with 4 FEBs FEB 2 FEB 3 FEB 1 FEB 4 Top view with 4 sq mm pads Bottom view –Connectors for FEBs

  9. GEM Chambers - Building blocks • 2 types of modules. One with pad size 4 sq mm and other with 10 sq mm • For 32×32 array of 4 sq mm pads, GEM size is 135 ×135 sq mm. • For 32×32 array with 10 sq mm pads , GEM size is 326.2×326.2 sq mm. • Both the PCBs will connected to 1024 pads • Will be read by 4 FEBS with each FEB reading 256 channels. . Basic components of GEM chambers Drift PCB GEM PCBS Readout PCB Pads

  10. No of Readout Channels, Readout PCB s For station 1: · No of readout channels = 82500+95625+109375 = 287,500 · No of PCBs required = 281 each reading 1024 channels with 4 sq mm For Stations 2, 3: · No of read out channels = 26500+29400+32400+44300+48000+51900=232,500 · Number of PCBs required = 228each reading 1024 channels 10 sq mm pads. Requirements for GEM PCBS: · The minimum size for station 1 = 135 ×135 sq mm for 281 modules · GEM foils required =281×3(for triple GEMS) = 843 · The minimum size for station 2 and 3 = 326.2×326.2 sq mm for 228 modules · GEM foils required for station 2 and 3= 228 ×3= 684 Total GEM foils = 843+684= 1527 Requirements of Drift PCBS: · No of drift PCBs for Station 1= 281 (135×135 sq mm) No of drift PCBs for Station2 and3 = 228 (326.2×326.2 sq mm No of FEB s, ROCS required: · No of read out PCBs with 4 and 10 sq mm pads= 281+228= 509 · No of FEBS required each reading 256 channels=509×4= 2036 · No of ROC s required (each ROC reading 2 FEB s) = 2036÷2=1018

  11. HV/LV channels HV Channels: For station 1 (one for each 135*135 GEMs) , we need 281 channels. Is it OK ?? For station 2,3 ( 3 for each 326*326 GEM), we need 3 HV channels. So 684*3=2052 channels Total HV Channels= 2052+281=2333 LV Channels: With separate channels for FEB and ROC we need 2036 +1018 =3054 LV channels Power Requirements: 2chip Feb With 3.3 v supply the power dissipation =10watts. 2000 FEBs consume =2000x 10Watts =20KW. One ROC need -3.5A @5V ( one FEB ). With two FEBs it is 4A 1000 ROC s consume = 1000x5Vx4A=20KW. Power consumption for 2000FEBs +1000 ROCs = 40KW Power consumption expected to come down

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