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DCS for TRD Pre-trigger Ken Oyama Jan. 22, 2007 DCS Workshop in Heidelberg
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Jan. 22, 2007K. Oyama2 Pre-trigger System Overview CLK before after L0L1 L0 p-t T0 (anti-) coincidence BPM dec. (TTCrx) BPM enc. (TTCex) BC+L0+L1 TRD control boxes L0, L1,… + pre-trigger + fast control outside magnet inside magnet V0 TOF CTP pre-trigger + trigger info ACORDE FEB FPGA
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Jan. 22, 2007K. Oyama3 Pre-trigger System Detail
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Jan. 22, 2007K. Oyama4 What to be Controlled 6 KIP DCS boards (3 for primary and 3 for backup). 8 Wiener LV supplies.
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Jan. 22, 2007K. Oyama5 Power Distribution 4 crates 18 ch. (optional) 4 crates 14 ch. All Wiener PS, same type as for TRD but smaller current. Special powering up methods (primary and secondary modes) are required next slide.
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Jan. 22, 2007K. Oyama6 Powering Up Methods (Day-I) PS Ch. [V] Purpose Normal Emergency O-08 1 -7 V0-A ON ON 2 +7 V0-A ON ON I-08 1 -7 CB-A,T0-A ON ON 2 +7 CB-A,T0-A ON ON O-29 1 -7 V0-C ON ON 2 +7 V0-C ON ON 3 -7 CB-TOF,CB-C,T0-C (primary) ON OFF 4 +7 CB-TOF,CB-C,T0-C (primary) ON OFF 5 -12 CB-TOF (primary) ON OFF 6 +12 CB-TOF (primary) ON OFF I-29 1 -12 CB-TOF (backup) OFF ON 2 +12 CB-TOF (backup) OFF ON 3 -7 CB-TOF,CB-C,T0-C (backup) OFF ON 4 +7 CB-TOF,CB-C,T0-C (backup) OFF ON Note: TRD has passive optical merger in the super-module to receive TTC (trigger and clock) via two optical fibers. If both primary and secondary system are turned on for CB-TOF, TRD will lose the TTC signal (well, will receive too many..).
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Jan. 22, 2007K. Oyama7 DCS board FPGAs Control through DCS (I) Use TRD standard infrastructure (IntercomLayer, FeeServer, DIM). Retrieve configuration data only from Database. Special “tag”? PVSS wingDB command coder InterCom Layer FEE Server (Control Engine) Device Drivers SCSN + JTAG Configuration (cfdat)
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Jan. 22, 2007K. Oyama8 Control through DCS (II) Max 5 out of 6 will be powered up at the same time. Do not configure primary and secondary system at the same time. Downloading the configurations (numbers are max. per DCS board). JTAG FPGA codes … 512k words. SCSN LE-Discriminators thresholds … 44 words. SCSN trigger elements delay setup… 44 words. SCSN (anti-)Coincidence mode setup … 1 words. TTC B-channel control (TTCrx-reset, sync, & etc)… several words. Pre-trigger commands for TRD detectors (go to acq., ADC phase fixing, & etc). Synchronization with TRD configuration is necessary … 1 words. Configuration script is given in “cfdat” structure of TRD.
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Jan. 22, 2007K. Oyama9 PVSS Logging 26 temperature sensors are available in all boxes. Live ratio and number of pre-triggers. Health condition.
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Jan. 22, 2007K. Oyama10 End of Run Procedure Readout counter values. from words 44 detector counters CB-A/C 88 44 issued counters CB-A/C 88 44 accepted counters CB-A/C 88 12 trigger element counters CB-TOF 24 12 issued counters CB-TOF 24 12 accepted counters CB-TOF 24 NOTE: 44 = 12 T0 + 32 V0. 12 = 1 TRD-alive + 8 physics + 1 CB-TOF + 1 CB-A + 1 CB-C. Reading out is done by shuttle. Implementation will be the same as for TRD.
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Jan. 22, 2007K. Oyama11 Summary and Plan Pre-trigger hardware is almost in the final shape however DCS software development just has started. Pre-trigger system needs control of only LV and Configuration through DCS board using intercom-layer. Pre-trigger use the same framework as TRD configuration therefore implementation will be straightforward and hopefully quick. Needs to be finished in half year.
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