april 21st 2010jacques lefrancois1 upgrade news scope of upgrade presented by andrei in upgrade...

April 21st 2010 Jacques Lefrancois1

UPGRADE NEWS

• Scope of upgrade presented by Andrei in upgrade meeting April 16th

• Role of trigger presented by Hans in upgrade electronics meeting April 15th

• Progress on other detectors (my selection):• OT electronics for 40 MHz readout presented April 15th

• Muon and Rich upgrade solution presented on April 16th

• Eventual Role of PS/SPD in upgrade• Hugo's presentation at last meeting => rediscussed last Friday =>

comments => suggestion for decision

• Role for photon offline ID => presentation by Frederic next

• Role for off line electron id => Victor and Dimitri at a future meeting.


Scope of upgrade (Andrei's presentation)


Andrei's presentation/ continuation


Conclusion

• Limitation to 10**33 well accepted

• Limitation in cost and scope more controversial but on average positive reaction => request for cost evaluation

• Scope defined => need to write calo part of LOI =>target date for first draft June!!!


Role of trigger (Hans 15/04/2010)

• In the 40 MHz readout the main trigger is software => HLT1 and HLT2

• However an efficient HLT1 requires seeds for tracks in various alleys => HLT1 HLT2 philosophy so hard to implement, we should change as little as possible in 2016 => need muon, HCAL, electron, gamma seeds and alleys

• In case the farm cannot accept 40 MHz in 2016 one should preserve if possible L0 information => using this information events can be rejected in TELL40 or early in the farm keeping the best candidates but with a limit at 5,10 or 20 MHz


Hans1


Hans2


Hans3


Hans4


Conclusion for Calo group on Trigger

• Should put more effort in transmission of L0 information => seeds transmitted at 40 MHz => needs to redo the selection boards which transmit seeds at 1 MHz in present system

• Cyril has accepted to take over this problem => next meeting "his presentation"!


Other detectors at 40 MHz

• OT tracker

• Muon

• RICH (mainly work on MAPMT analog readout)

• VELO ongoing: VELO upgrade electronics discussion April 21st

• IT : difficult problem


LHCb OT upgrade , intro

1. GOL/AUX board= FE interface boardNEW: GBT , Opto , reg

2. Otis board = TDC boardNEW: FPGA’s , adc and dac-high speed output-Zero suppress

3. Optical comunication system

Same:ASDBLR board= Amp /discriminator boardInside: HV signal separation board=

incl Detector interface to 128 straws

HV cable

Control cable

Fiber

So what must be NEW ?

Front End Boards

April 21st 2010 Jacques Lefrancois13April 20, 2023 Outer Tracker Upgrade 13

OT FE Upgrate proposal (40 MHz)OT FE Upgrate proposal (40 MHz)

ReplacesGol/AuxBoard

Replaces OtisBoard

2 x ASDBLR

LVDS Drivers

FPGATDC 16ch

2 x GBTX10 Gb/s

2 x GBTX10 Gb/s

2 x GBTX10 Gb/s

2 x GBTX10 Gb/s

8 Fibers40 Gb/s

FPGATDC 16ch

Replaces OtisBoard

2 x ASDBLR

LVDS Drivers

FPGATDC 16ch

FPGATDC 16ch

Replaces OtisBoard

2 x ASDBLR

LVDS Drivers

FPGATDC 16ch

FPGATDC 16ch

Replaces OtisBoard

2 x ASDBLR

LVDS Drivers

FPGATDC 16ch

FPGATDC 16ch


Test AssemblyTest Assembly

April 20, 2023 Outer Tracker Upgrade 14


Two slides for muon 40 MHz

• Pier Luigi presentation April 16th.


16


17

FROM DETECTOR

FROM DETECTOR42k LOG Channels

100 new ODE

200 new ODEno X&Y, 3D pads


Calo upgrade: role of PS/SPD at 40 MHzHugo's presentation X_Y_2010

• For trigger: Define the electron and photon alleys

• Photon alley the most costly per event since there is no track candidate for IP => all VELO track have to be tested

• For photon alley start by rejecting merged Pizero in photon candidate gain about factor 3 at high Pt Then confirm absence of track by tracking in T station

• For electron alley => find electron candidate track => continue to VELO => find IP


Current HLT1 alleys (HUGO-1)

19

L0-e (~50%)

e-line

-line from e

-line from e

• If e and threshold are similar:

• My interpretation from yesterday’s Mariusz talk at http://indico.cern.ch/conferenceDisplay.py?confId=67047

confirm

anti-confirm

anti-confirm

confirm, cut IP (not for J/)

look for 1(2) kaon cands

with IP

NameL0

T stations VELO T stations

HLT

L0-e (~50%)

-line from

confirm kaons, cut

on their pT -removal

No straight-forward to estimate effect of SPD/PS on timing


Efficiency vs rate, electrons (Hugo-2)

20

170

kHz

B+e+e-K- Be+e-K*

170

kHz

> 2 GeV

>5 GeV


Efficiency vs rate, photons (Hugo-3)

21

Using only ECAL clusters matched to MC (< 60 cm)

No dfifference between both plots only the true is able to trigger L0-em

65 k

Hz

65k

Hz

Cut at 3 GeV

Cut at 4.25 GeV

Do better withot SPD/PS???

Bs Bs


Conclusion on PS/SPD

• Discussion on telephone conference April 16th (Hugo, Miriam, Marie-Noelle , Pascal, Frederic, J.L.)

• PS/SPD role minor for photon trigger

• PS/SPD changes candidates by about 1.6 for electron trigger

• Conclusion• It would be nice to redo main plots with higher luminosity Monte Carlo

selecting events with multiple interaction (Hugo's but not immediatly)

• One should check with Hans (i.e. trigger group) the fraction of time spent in tract finding in T stations ONCE THE TRACK LOCATION IS DEFINED BY THE ECAL CLUSTER (Hans intuition => smaller cluster => smaller road => faster than for Hadron trigger with HCAL seed )

• Frederic checks role of PS/SPD in off line photon ID

• In // study of offline role of PS/SPD for electron ID (Victor+Dimitri)

• The decision based for trigger on cost of PS/SPD 40MHz vs bigger farm

april 21st 2010jacques lefrancois1 upgrade news scope of upgrade presented by andrei in upgrade...

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