Trigger/inner liner work in Perugia

KOPIO collaboration KOPIO collaboration meetingmeeting

Feb 7,2004Feb 7,2004

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Trigger/Inner liner – KOPIO meeting - 7/2/04

Subjects TriggerTrigger

Ermanno’s rate/efficiency estimates 10 X 10 tunable coincidence matrix Plans for simulation of “tracking” algorithms

Inner linerInner liner The detector scheme we have in mind Test program and status Simulation plans

Manpower+financial situationManpower+financial situation

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Trigger/Inner liner – KOPIO meeting - 7/2/04

L0 trigger: the bottom line of Ermanno’s simulation

IngredientsIngredients Cluster counting on prerad+shashlik x-y “strips”

integrated in depth Penetration condition (at least two adjacent layers in

PR) Use of vetoes (±5ns time window) except

Far downstream Catcher

Prerad scintillator timing with resolution from position compensated coincidences

Typical resultsTypical results Rate 32 kHz Efficiency 62%

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Trigger/Inner liner – KOPIO meeting - 7/2/04

Ermanno’s trigger simulatiom

Further simulation plansFurther simulation plans Test pattern recognition

algorithms with sensitivity to track directions

New undergraduate (Michele Viti) will start working on this

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Trigger/Inner liner – KOPIO meeting - 7/2/04

Improve PR online time resolution

Second prototype of x-y coincidence Second prototype of x-y coincidence matrix with delay compensationmatrix with delay compensation

10 X 10 matrix on an ACTEL A54SX08A ( no placement & routing costraints )

Delay value set in 4 steps of ~0.4ns (value loaded serially)

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Trigger/Inner liner – KOPIO meeting - 7/2/04

Performance of 10 X 10 coincidence matrix

Measure delays of each output wrt first in same row/column:Measure delays of each output wrt first in same row/column: Reprogram delay values to 1.3ns per cellReprogram delay values to 1.3ns per cell Histogram Histogram =(measured value) =(measured value) –– (set value) (set value)

Small tail of delays too large at minimum setting

Can be improved with: placement/routing constraints higher speed-grade devices

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Trigger/Inner liner – KOPIO meeting - 7/2/04

I.L. : what we have in mind

Legend: shashlik

crystal

WLS bar/fibre

beambeam

Assumptions:Assumptions: IL only inside Shashlik All crystals in a row parallel to beam axis

can be read out with a single WLS plate running on top of the fins

If crystals match the Shashlik modules they can be held in the same mechanical structure

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Trigger/Inner liner – KOPIO meeting - 7/2/04

Test setup Motivated by Motivated by

Results of Woody,Stoll,Frank, IEEE Trans.Nucl.Sci 42(1995)292

BC 404: 85 p.e./MeV ( no longer produced by Bicron )

BC 408: ~25% less ( no longer produced by Bicron )

Optical simulation by Mauro Raggi We plan to testWe plan to test

Bicron BC 408 3mm Bicron BC 499 6mm Kuraray SCSN-81 3,6,9mm Kuraray SCSN-61 3mm

Test stand with tracking for cosmic raysTest stand with tracking for cosmic rays Expect to start sometimes in march

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Trigger/Inner liner – KOPIO meeting - 7/2/04

CsI crystal assembly

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Trigger/Inner liner – KOPIO meeting - 7/2/04

CsI crystal assembly

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Trigger/Inner liner – KOPIO meeting - 7/2/04

Absorption spectra

SCSF-81,61

BC-408BC-404

BC-499

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Trigger/Inner liner – KOPIO meeting - 7/2/04

Inner liner simulation studies

Need to learnNeed to learn Is inner liner needed ? Can we do without PR inner liner? What is an optimized configuration ?

ToolsTools Inner liner geometry

Basic description included in KOPIO Geant Has to be made compatible with subsequent modifications

Fast/hybrid option of KOPIO GEANT MC Developed and tested by Ermanno on version v04 If GEANT simulation only for tracks within 20 cm from the

beam hole, execution time improved by >5X Note + update to version v06 in preparation

New undergraduate (Alessandro Grelli) will start working on New undergraduate (Alessandro Grelli) will start working on thisthis

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Trigger/Inner liner – KOPIO meeting - 7/2/04

Manpower + financial situation

The work described here has been performed byThe work described here has been performed by Ermanno Imbergamo

• research contract, now Ph.D student (NA48) Riccardo Cenci

• undergraduate, now Ph.D student in Pisa Mauro Raggi

• now Ph.D. student (NA48) N.Nappi, G.Anzivino, M.Valdata, P.Cenci

None at full time + some interests are shifting Material for crystal tests bought with INFN FY 2003 moneyMaterial for crystal tests bought with INFN FY 2003 money Very small budget allocated by INFN on FY 2004Very small budget allocated by INFN on FY 2004

4.000(+4000)€ + 7000€ (travel) INFN has INFN has strongly strongly recommended to enlarge the italian recommended to enlarge the italian

component of the collaboration component of the collaboration Deadline for final assessment of interests in Perugia and ItalyDeadline for final assessment of interests in Perugia and Italy

2005 budget requests, to be filled in june