s TGC trigger processor NSW Electronics workshop November
s. TGC trigger processor NSW Electronics workshop November 2013 L. Levinson Weizmann Institute L. Levinson NSW Electronics Workshop, November 2013 1
s r te m i 7 L. Levinson f 68 s e br fro NSW Electronics Workshop, November 2013 u ro 2
Centroid algorithm • • Use average of centroids in each quad to define space points R 1 & R 2 1, 2, or even 3 of the 4 centroids of a quadruplet are omitted in averaging if: – – L. Levinson -ray's: wide (>5 strips) Neutrons: large charge or wide Noise: single strip Pileup, i. e. pulse in a component strip is active before the trigger NSW Electronics Workshop, November 2013 3
Centroid algorithm details L. Levinson NSW Electronics Workshop, November 2013 4
Centroid finder results • • 65 nsec with 200 MHz FPGA clock Cosmic ray test of one quadruplet Trigger demonstrator using Xilinx Virtex-6 evaluation board Custom mezzanine cards to accept the LVDS signals from 8 (16 -chan) TGC ASDs, 4 strip + 4 pad layers: – Triggers on 3 -out-of-4 pad layers – Calculates Time-over-Thresholds 1 ns sampling – Finds 4 centroids 1 – Selects and averages centroids – Sends inputs and outputs to ethernet for recording, playback Confirms that the output will be in time to the Sector Logic 1 Calculation done with strip number and 12 bits for the fraction of a strip L. Levinson A cosmic ray passing at an angle thru’ a quadruplet. are the centroids (values on the left) Dashed line is the calculated average. NSW Electronics Workshop, November 2013 5
One of two quadruplets L. Levinson NSW Electronics Workshop, November 2013 6
s. TGC trigger demonstrator quadruplet L. Levinson NSW Electronics Workshop, November 2013 7
s. TGC Trigger Demo-1 FPGA board for 4 layers of 64 strips Power mezz module Trigger Data Serializer FPGA (Virtex-6) 16+12 ASD connectors Pad trigger/ centroid FPGA (Kintex-7) Quad 10 G fibre interface 10 G twinax*4 connector Ethernet readout L. Levinson NSW Electronics Workshop, November 2013 8
s. TGC trigger demonstrator VMM 1 s. TGC quadruplet Pad readout Strip readout L. Levinson NSW Electronics Workshop, November 2013 9
Next steps • Basic algorithm implemented • Now: Event-by-event with cosmics • Next: pipeline the algorithm to work at 40 MHz – From Playback board using MC generated events – Play back cosmics at high rate – Playback design working in additional demo board • VMM 2 FE board with companion emulator (shown yesterday) L. Levinson NSW Electronics Workshop, November 2013 10
VMM 2 board for trigger demonstrator • 128 channels • Design in progress L. Levinson NSW Electronics Workshop, November 2013 11
Backup L. Levinson NSW Electronics Workshop, November 2013 12
How does a muon look in a background environment Need to reject bad individual layer measurements to get good coordinates -ray neutron L. Levinson, December 2012 s. TGC Electronics Overview, Les Houches NSW Electronics Workshop 13
- Slides: 13