FINUDA%20TRIGGER

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FINUDA TRIGGER
Simonetta Marcello - Torino Paola Gianotti -
LNF Fulvio Pompili - LNF Aldo Zenoni (MC) -
Brescia Francesca De Mori (OA) - Torino . .
Simonetta Marcello - Torino

• FINUDA Collaboration Meeting
• Trieste, May 6-7 2004

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• FINUDA TRIGGER Strategy

For more details ISEO 2002

• SELECTIVE TRIGGER based on fast detector
  (TOF) and electronics
• MODULAR and PROGRAMMABLE STRUCTURE
  to have a flexible configuration
• CARE of TRIGGER DESIGN
  from the beginning to cope
  with high rates (up to 30 MHz)
• Dedicated MC SIMULATION
  physical events, background (Touschek)
  2000 G.Gomez- 2003 A. Zenoni
• Latency 200 ns
  at
  First Level
• RF signal not used at all in the Logic
  (due to old FEE
  on detectors)
  RF 380 MHz (interbunch time
  2.6 ns)
  F rate 400 Hz , interaction time 2 ms
  HYP rate lt 1Hz
  
  Bhabha lt 200 Hz
• Asynchronous Trigger
  (continous source of events)

L 1032 cm-2 s-1
FINUDA TRIGGER - Simonetta Marcello - TS 6/5/04
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ISEO 2002
FINUDA TRIGGER - Simonetta Marcello - TS 6/5/04
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TRIGGER LOGIC
LASER
FINUDA TRIGGER - Simonetta Marcello - TS 6/5/04
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TRIGGER LOGIC
FINUDA TRIGGER - Simonetta Marcello - TS 6/5/04
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Moduli VME (Heart of Trigger Logic)progettati e
realizzati da Silvano Gallian Electronic Lab -
Torino INFN)

• Pattern Recognition LE297 BtB
  Topologies OK
• Multiplicity Selector LE308 HYP,
  BHA multiplicities OK
• Prescaler LE312 prescaling
  triggers OK
• Prompt Coincidence LE301 Dtof
  Tofino-Tofone

Not working in CRoom! Already repaired, it still
gives problems of noise. New tests and/or design
needed Estimated time 6 m.u.
FINUDA TRIGGER - Simonetta Marcello - TS 6/5/04
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MC ISEO 2002
Rate TOFINO 400 kHz !
FINUDA TRIGGER - Simonetta Marcello - TS 6/5/04
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MC ISEO 2002
FINUDA TRIGGER - Simonetta Marcello - TS 6/5/04
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TRIGGER EFFICIENCY
TRIGGER Efficiency for BHABHA selection
Beam Runs Dec 2003 with Trigger ORTofinoORTofone
Pattern Recognition exclusive BTB 1-3
Topologies 95 evaluated on TDC hits 98
evaluated on MT hits
Multiplicity Selector BTB1-3 Mult 2-7 on
Tofone 90 evaluated on TDC hits 99 evaluated on
MT hits ? evaluated on MT hits inside Tofino
gate
FINUDA TRIGGER - Simonetta Marcello - TS 6/5/04
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TRIGGER EFFICIENCY
What about Trigger Efficiencyfor HYP selection ?
Maybe not enough statistics on Beam Runs
2003-04 with Trigger ORTofinoORTofone We have to
check including last runs
FINUDA TRIGGER - Simonetta Marcello - TS 6/5/04
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Trigger Timing
FINUDA TRIGGER - Simonetta Marcello - TS 6/5/04
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Trigger Timing
MC ISEO 2002
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Common STOP
OR Tofino (Physics , Cosmics) OR Tofone
(Cosmics) Photodiode (LASER) RF (not used, but
read out on dedicated TDC)
Programmable Choice using Output Register CES1320
ST03
FINUDA TRIGGER - Simonetta Marcello - TS 6/5/04
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TO BE or NOT TO BE
RF for Physics (on all TDCs) OR RF not used,
but read out on dedicated TDC
Resolution still depends on Tofino and Tofone ones
FINUDA TRIGGER - Simonetta Marcello - TS 6/5/04
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Higher Levels of Trigger
Maybe useful at 3rd Level
TOF again at 2nd Level ?
Do we need a strict selection ?
FINUDA TRIGGER - Simonetta Marcello - TS 6/5/04