Trigger und Datennahmesysteme

!"#$$%"&'()&*+,%((+-.%/0/,%.%

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Trigger and data accepting systems

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9(-+:,

• ;"<=:%./,%::'($

• >%#/?#%:&@0<(:%=%(/)+'%"

• AB,%"(%&1+()=%)#($'($%(

• C<(D%?,%&'()&%,E+/&!-%<"#%

• !"#$$%"/0/,%.%&#(&)%"&F<G-%(%"$#%?-0/#H

• F+")E+"%,"#$$%"

• 2<IE+"%,"#$$%"

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example lifetime of Myons

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external boundary conditions

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concept and some theory

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way of looking at the problem

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triggersystems in HEP

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;"<=:%./,%::'($

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way of looking at the problem

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;"<=:%./,%::'($

!""#$%

JFK&'()&L!JL2M&C<::#/#<(/"+,%&&N7&@FD&O)4-4&L::%&63(/PM&6Q&#(%:4&RR&?%"&C<::#/#<(M&*+,%("+,%&843&@>&SN7@FD&T&U7&!>V/M&2?%#G-%""+,%&677FD

!"#$%&'$()(*+!#(/,+,+-.QN+/#M8'M8

N

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kollisonrate

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datarate

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datasaving rate

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;"<=:%./,%::'($

• WX(:#(%Y&Z&2%:%H[<(&W$',%"Y&A"%#$(#//%

• \(,%")"]GH'($&)%/&\(,%"$"'()/

• 2,%'%"(&)%"&*%,%H,<"+'/:%/%

• ^'/+..%(_]-"'($&)%"&*+,%(&+'/&`%"/G-#%)%(%(&2'=M*%,%H,<"%(

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online selection of "good" events

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suppression of the background

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controlling the detector selection

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combining the data of various subdetectors

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• 01$2231

– 45'(+3$%+613$2%$'+7&(3%8399+$%(313'':%(;<

• =:(3%%:>#3'?'(3#

– @"'93'3+A31+B"CA3(3D(&13%+"%A+E"':##3%FG>1"%2+A31+

5%F&1#:8&%3%+$%+3$%+46H3%(IJ3/&1A<

• 5%+J3:9$()(*+401$2231I+"%A+=:(3%%:>#3'?'(3#<

– 3%2+#$(3$%:%A31+H31D%G7K

– :"F3$%:%A31+:C23'8##(

– 23#3$%':#+3%(L$/D39(

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Is the event possibly interesting?

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data acceptingsystem

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getting the information form the subdetectors and combine the information in an "event-record"

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closely related to each other

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hammonized

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developed at the same time

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L!JL2&!"#$$%"M&'()&*+,%((+-.%/0/,%.

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problem set up

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• M3''71$%N$7– @CC13#'3%+3$%3'+M?&%'+:"'+A31+D&'#$'/>3%+B(1:>9"%2

– M3''"%2+A3'+E31F:99'+µ+IO+3!µ!3+A"1/>+P:/>L3$'+A3'+693D(1&%'

– Q3'8##"%2+A31+E31F:99'N3$(+FG1+H$393+M?&%3%R+6S7&%3%8:9T(+:%+A$3+U31(3$9"%2+A31+E31F:99'N3$(3%

!µµ

%!3

BN$%899:(&1C9&/D

@"'93'3393D(1&%$D+VW>&(&#"9879$31R+

++++++++++++++++++++++++++++++++++=$'D1$#$%:(&1R+

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measurement of the Myon lifetime

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measurement principle

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resducing the speed of the cosmic Myon

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measuring the decay, by detecting the electron

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determine the decay time of many Myons, exponential fit of the distribution of the decay times

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@%//'($&)%"&@0<(:%=%(/)+'%"

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measuring the Myon lifetime

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stopping puls

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decay puls

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@%//'($&)%"&@0<(:%=%(/)+'%"

• M3'':"[:"+$#+W1$%N$7+&D+V61L:1(3+\+W"9'3*+M?&%+"%A+693D(1&%Z

• W1&C93#3*+– M?&%1:(3+'3>1+>&/>+VH$393+A"1/>23>3%A3+M?&%3%Z

– 5A3%8TN$31"%2+3$%3'+E31F:99'+ µ+IO+3!µ!3+

!µµ

%!3

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@"'93'3393D(1&%$D+VW>&(&#"9879$31R+

++++++++++++++++++++++++++++++++++=$'D1$#$%:(&1R+

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measurement of the life time

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main idea of the setup clear (2 expected pulses:Myon and electron

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Probems

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high Myon rate

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identificatoin of the decay

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!"#$$%"=%)#($'($a&2-&b&2\&b&K&b&2]c

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measurement of the myon lifetime

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triggercondition

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yes

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yes

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yes

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no

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delay

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AB,%"(%&1+()=%)#($'($%(

!"#$$%"M&'()&*+,%((+-.%/0/,%.

>%/G-:%'(#$%"M&1+,%M&^%#,/"'H,'"

;-0/#HM&1+,%M&2%:%H[<(/_d-#$H%#,

AB?%"#.%(,=%,"#%=M&2,+=#:#,d,M&!<,D%#,

*+,%(+(+:0/%M&AeD#%(DM&;"%/G+:%

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accelerator

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rate

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timestructure

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rate

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ability to select

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operation the experiment

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stability

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dead time (?)

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data analysis

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efficiency

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• L$%'(&T&):gF OhB%)&,+"$%,P• L$%'(&T&fC

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• ^%#,/,"'H,'"– i<"$%$%=%(&)'"G-&)+/&F<G-_"%j'%(D/0/,%.&D'"&>%/G-:%'(#$'($

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luminescence

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event

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d-beam cross section, I- targetlength, F- target konstant

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F- particle flux, N - particles per bunch, f- frequency, k - number of bunches

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time structure

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determined by the highfrequenzysystem for the acceleration

6S(31%3+J:%AC3A$%2"%23%*+

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lifetime

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time to make a decision for the lowest trigging rate

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szintillatorsurface

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• @0<(:%=%(/)+'%"– 2#$(+:&#.&2D#([:+,<"k&H%#(%&/?%D#h/G-%&@0<(&<)%"&A:%H,"<(/%:%H[<(

• L!JL2– 9)%([hD#%"'($&'()&&&&i%".%//'($&`<(&

&&&!%#:G-%(&#(&AG-,D%#,

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Myon life time

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signal inside the szintilator, no specific Myon or electron selection

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real time identification and scale measurement of the particles

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C<(D%?,%a&!<,D%#,A#(_+G-%/&!"#$$%"&'()&*+,%((+-.%/0/,%.&&M&2%(/<"&OD4>4&2#:#D#'.&*%,%H,<"P&&M&;"dD#/#<(/)#$#,+:#/#%"'($&)%/&2#$(+:/&&M&*#$#,+:%&;"<D%//#%"'($&'()&2?%#G-%"'($&&M&2,+",&)'"G-&%#(&/G-(%::%/&!"#$$%"&2#$(+:&&&&&OD4>4&2G-E%::%()#/H"#.#(+,<"P

@l$:#G-%&J#.#[%"'($&&M&:+($/+.%"&L*K&H+((&Ed-"%()&)%"&C<(M&&&&&`%"[%"'($&(#G-,&(%'&$%/,+",%,&E%")%(&&M&:+($/+.%"&;"<D%//<"&'()&2?%#G-%"&Hl((%(&&&&&('"&=%$"%(D,&*+,%(&+'_(%-.%(

&&&&Mm&!<,D%#,&Mm&>'/0MJ<$#H

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concepts: 'dead time'

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easy trigger and data accepting system

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precisiondigitalisation of the signal

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digital processing and saving

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starts using a fast trigger signal

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possible limitations

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slow ADC cannot be restarted while converting

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slow processor and memory can only save a limited amount of data

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dead time --> busy-logic

C<(D%?,%a&!<,D%#,>'/0&J<$#H&&M&/,+",%,&*#$#,+:#/#%"'($&'()&;"<D%//#%"'($&&M&/%,D,&g:#?Mg:<?&&&M&`%"-#()%",&L((+-.%&E%#,%"%"&!"#$$%"&&&&Mm&>%$#(&)%"&!<,D%#,&&M&*#$#,+:#/#%"'($&=%(l[$,&H<(/,+(,%&&^%#,&&M&;"<D%//#%"'($&-d($,&`<.&*+,%(`<:'.%(&&&&&+=&&M&;"<D%//<"&:l/G-,&)+/&g:#?Mg:<?&&&&Mm&A()%&)%"&!<,D%#,

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starts signal digitisation and starts processing

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positions (?) flip flop

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stops accepting trigger

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dead time starts

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the signal digitisation needs a constant time

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the prossesing depends on the amount of data

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processor delates flip flop

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the dead time ends

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>%"%G-('($&)%"&!<,D%#,

• L((+-.%a&(#%)"#$%&1+,%&'()&(#%)"#$%&!<,D%#,

7 !!"#$$%"&.#,&1+,%&n

!<,D%#,&t

1%:+[`%&!<,D%#,&*!&T&r&Ta&nt>%#/?#%:a&&n&T&87&FDk&&t&T&8&./&&&Tm&*!&T&7478&T&8n

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calculation of the dead time

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assumption: low rate and low dead time

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trigger with rate n

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dead time

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example

>%"%G-('($&)%"&!<,D%#,

• C<""%H,%&>%"%G-('($a

7 !!"#$$%"&.#,&1+,%&n

!<,D%#,&t(1:23%+%$/>(+N"1+0&(N3$(+C3$

1%:+[`%&!<,D%#,&*!&T&r/(1+r)&Ta&nt/(1+nt)>%#/?#%:a&&n&T&87&FDk&&t&T&8&./&&&&&Tm&*!&T&7477oo78&T&74oo78n&&&&&&&&&&&&&&&&&n&T&87&FDk&&t&T&87&./&&&Tm&*!&T&747o7o&&&&&T&o47on n&T&87&FDk&&t&T&37&./&&&Tm&*!&T&74QQ&&&&&&&&&&T&QQn

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calculation of the dead time

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accurate calculation

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trigger with rate n

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dead time

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don't contribute to the dead time

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relative dead time

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example

>%"%G-('($&)%"&!<,D%#,a&F%":%#,'($

n&T&(V! L(D+-:&)%"&!"#$$%"&(&?"<&p%/+.,D%#,&!k&!<,D%#,&t

1%#-%(%(,E#GH:'($a&&&&&&&&&&&&&&t-&T&t O!<,D%#,&_]"&%#(&A"%#$(#//P&&&&&&&&&&&&&&t\&T&t-&q&t O8Mt-V!P&T&6t&M6t\V!&&&&&&O!<,D%#,&_]"&DE%#&A"%#$(#//%P&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&4444

Q3$'7$39+d-+6S731$#3%(*+t,-#'R+=0,-.e+IO+n,-..dN

.#, O!<,D%#,&_]"&(&A"%#$(#//%P

Tm Tm

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calulation of the dead time: derivation

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number of trigger n occuring during time T, dead time t

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series expansion

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dead time for one event

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dead time for 2 events

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dead time for n events

6fN$3%N'(3$231"%2+A"1/>+NL3$(3+

+L'/:%/%D%#,&t

2%:%H[<(aE(,/G-%#)'($/D%#, t21%)'H[<(/_+H,<"&C

@#r:%"%&L(H'(I/D%#,&t:

t\st

9)%%a&M&`%"E%"_%&'(#(,%"%//+(,%&A"%#$(#//%&&&&&/%-"&/G-(%::&t\M&`%"/G-E%()%&H%#(%&^%#,&.#,&)%"&L'/:%/%&&&&'(#(,%"%//+(,%"&A"%#$(#//%M&:%/%&('"&#(,%"%//+(,%&A"%#$(#//%&+'/

g3%:"3+=3T%$8&%3%+"%A+#:(>3#:8'/>3+=3(:$9'

+IO+'$3>3+BD1$7(*+=h+i323%31R+=&1(#"%A

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increasing the efficiency by using a second

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mean arrivaltime t_a

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decisionmaking time t_2

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reduction factor

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selection time t

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idea

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very fast get rid of events that are not interesting (t_2)

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don't waste time selecting non interesting events

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only select interesting events

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for further and more accurate details see D.Wegener

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J3A"N$31"%2+A31+0&(N3$(+A"1/>+NL3$(3+

pa&AeD#%(/,%#$%"'($&)'"G-&%#(%&DE%#,%&!"#$$%"/,'_%

k T&CVO8qCP

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efficiency improvement by using a second trigger level (?)

>%#/?#%:a&F8

@%-"/,'h$%/&20/,%.&!"#$$%"/0/,%..#,&/G-"#rE%#/%"&1%)'D#%"'($&)%"&1+,%

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a more level trigger system, reducing the rate step by step

L'/:%/%&.#,&>'t%">%#/?#%:a&&&M&/G-(%::%&g"<(,A()&A:%H,"<(#Ha&3./&&&M&:+($/+.%&L'/:%/%a&37./9)%%a&&&M&^E#/G-%(/?%#G-%"&`<"&)%"&L'/:%/%&&&M&>'t%"a&g9gX&&&M&^E#/G-%(/?%#G-%"&(#..,&*+,%(&&&&&&Ed-"%()&)#%&L'/:%/%&:d'I&+'_&&&M&LHD%?[%",&E%#,%"%&A"#$(#//%&&&M&@#(#.#%"'($&)%"&!<,D%#,&&&M&L(_+($%(&`<(&H'"D_"#/[$%(&&&&&&1+,%(u'H,'+[<(%(

R#%&:+($&.'//&/<&%#(&>'t%"&/%#(vR+((&:d'I&)%"&>'t%"&`<::vR#%`#%:&>'t%"&.+G-,&2#((v

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selection using a buffer

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example

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fast frontend electronics

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slow selection

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idea

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buffer before selecting

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buffer collects data during the selection

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buffers further events

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minimizes the dead time

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starts ratefluctuations limited to a very short time

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what time interval should the buffer cover?

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when is the capacity of the buffer full

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what size should your buffer have

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processor

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memory

!<,D%#,&_]"&L'/:%/%&.#,&>'t%"

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dead time for the selection with a buffer

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rate

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dead time

!<,D%#w"%#%&!"#$$%"

• !"#$$%"%(,/G-%#)'($&=%(l[$,&^%#,&Mm&!<,D%#,

• 9)%%a&– 2?%#G-%"%&*+,%(&Ed-"%()&)%"&A(,/G-%#)'($/D%#,– A"D%'$'($&`<(&!<,D%#,&%"/,&)'"G-&)#%&L'/:%/%– W;#?%:#(%)Y&!"#$$%"– C<.?:%B%&W<(M)%,%G,<"Y&A:%H,"<(#H

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trigger without deat time

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triggerselection needs time--> dead time

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idea

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save data during the time the decision is made if the data is interesting

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only create a dead time by selection of the data

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complex 'on-detector' electronics

Pipelined Trigger

;#?%:#(%&_]"&x%)%(&L'/:%/%H+(+:&#.&*%,%H,<"&&&&&&&&&&O+(+:<$&<)%"&)#$#,+:P&&&&&&&&&Jd($%&)%"&;#?%:#(%&OL!JL2P&&&&&&&&&&&T&877M86y&O643&Z&Q&µ/P

>%#/?#%:)%,%H,<"

8&L'/:%/%H+(+:&

65

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example of a pipelined trigger

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pipeline for every selection channel inside the detector

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length

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selection channel

Pipelined Trigger


>%#/?#%:)%,%H,<"

8&L'/:%/%H+(+:&

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Pipelined Trigger


J8&!"#$$%"D4>4&C+:<4&!"#$$%"

>%#/?#%:)%,%H,<"

8&L'/:%/%H+(+:&

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Pipelined Trigger


J8&!"#$$%"D4>4&C+:<4&!"#$$%"

^%(,"+:%&!"#$$%"J<$#H

>%#/?#%:)%,%H,<"

8&L'/:%/%H+(+:&

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Pipelined Trigger


L'/:%/%

J8&!"#$$%"D4>4&C+:<4&!"#$$%"

^%(,"+:%&!"#$$%"J<$#H

>%#/?#%:)%,%H,<"

8&L'/:%/%H+(+:&

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selection

Pipelined Trigger


L'/:%/%

J8&!"#$$%"D4>4&C+:<4&!"#$$%"

^%(,"+:%&!"#$$%"J<$#H

>%#/?#%:)%,%H,<"

8&L'/:%/%H+(+:&

M&J+($%&C+=%:M&J8&A(,/G-%#)'($/D%#,a&z8µ/

65

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long cables

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selection time

^E#/G-%(M^'/+..%(_+//'($

• !"#$$%"&/%:%H[%",&W#(,%"%//+(,%&A"%#$(#//%Y• 2,+",/#$(+:&)%"&*+,%(?"<D%//#%"'($VL'/:%/%• >%(l[$,&W>'/0YMJ<$#H• R#G-[$%"&g+H,<"&_]"&)+/&AB?%"#.%(,&#/,&)#%&!<,D%#,

• C<(D%?,%&D'"&1%)'D#%"'($&)%"&!<,D%#,–@%-"/,'h$%&!"#$$%"/0/,%.– L'/:%/%&>'t%"

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summary

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trigger selects 'interesting events'

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signal to start the dataproccessing/selection

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needs busy-logic

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it is important to consider the dead time

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concepts to reduce the dead time

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multilevel triggersystems

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selection with buffer

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@<)%"(%&!"#$$%"/0/,%.%

• f<,E%()#$&#(&+::%(&AB?%"#.%(,%(

• i%"E%()%,&.<)%"(/,%–@#H"<%:%H,"<(#H

– f%,DE%"H,%G-(<:<$#%– 9!M&'()&2<IE+",%G-(<:<$#%

• C"%+[`%&C<(D%?,%

• C<(D%?,%&/#()&]=%","+$=+"

• C<(H"%,%&Jl/'($%(&/#()&%B?%"#.%(,/?%hD#/G-

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modern triggersystems

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neccesary for all experiments

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uses most modern

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microelectronic

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network technology

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it- and softwaretechnology

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creative concepts

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concepts can be used for various experiments

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but depending on your own experiment you should choose the right concept

Das ATLAS Experiment!!"

#$"

Q7

%&&'('()*'+',+-(+++++I+]+!:23%+B$9$N$"#+W$S39+=3(3D(&13%

+++++I+j+!:23%+B$9$N$"#+B(13$F3%+=3(3D(&13%

+++++I+].+!:23%+kC312:%2''(1:>9"%2'A3(3D(&1

+++++I+B&93%&$A#:2%3(+V\0Z

+++++I+/:h+j.M+l:%)93

./0-(1"'+'(+++++I+a9G''$2I@12&%+l:9&1$#3(31

+++++I+W9:'8D'N$%899:(&1+l:9&1$#3(31

+++++I+/:h+\..D+l:%)93+

23-&4'+',+-('&++I+=1$K1m>13%+

++I+B/>%3993+01$2231

++++=3(3D(&13%

++I+0&1&$A#:2%3(+V.hn0Z

+I+/:h+n..D+l:%)93

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drift pipes fast trigger detectors toroidmagnet about 500k channels

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inner detector

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stripe

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liquid

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about 200k channels

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2#$(+:%&+.&JFKa&>%#/?#%:&F#$$/

i<"/%:%H[<(&.#,&C+:<"#.%,%"M&'()&@]<(/#$(+,'"%(&.l$:#G-&

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signals at LHC: ex. Higgs

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preselection with kalorimeter and myon signatures possible

Generisches Trigger Design

A`%(,&"+,%*+,+&`<:'.%

&&&&&&&&&&&L`+#:+=:%&&&&&&&&"%//<'"G%/;"<G%//#($&[.%

L!JL2 K@2

J%`%:&8F+")E+"%

K+:<"#.%,%"k&@'<(/

J%`%:&8F+")E+"%

K+:<"#.%,%"k&@'<(/

J%`%:&6K;\Mg+".L::&)%,%G,<"&O1<9&=+/%)P

A`%(,&g#:,%"K;\Mg+".L::&)%,%G,<"&

O?+",:0&1<9&=+/%)P

F#$-%"&J%`%:&!"#$$%"K;\Mg+".L::&)%,%G,<"&

56

758

Q6

Trigger and Data AcquisitionL!JL2 K@2

QQ

Level 1 Calorimeter Trigger

QN

,"#$$%"&,<E%"/&.+?

.h-S.h\9:6);<!<;)9:#

.hoS.ho-\n9:#);<!<;)!:=

.h\S.h\#:$);<!<;)9:6

.h-S.h-<!<;)#:$

"! S+"#&'()*'+

1%)'G%)&p"+(':+"#,0&M&!"#$$%"&!<E%"&M&/'.&'?&,<&U7&G%::/&M&/[::&h(%"&$"+(':+"#,0&&&&,-+(&%4$4&K*g

!@1+Y:9&1$#3(31p"+(':+"#,0

$

!

Level 1 Calorimeter Trigger

Q3

Y9"'(31+W1&/3''&1

>?@5A7?@

5

M&2:#)#($&R#()<E&,%G-(#j'%&&'/%)&,<&#)%([_0&%:%G,"<(/k&,+'/&+()&x%,/M&2'.&'?&!"#$$%"&!<E%"/&,<&)%,%".#(%&A0

#$''++()&A('"#++O(<&.'<(/&#(G:4P

%V! L:$<"#,-. {%,&L:$<"#,-.

Der Kalorimetertrigger

B('B(-C'DD-(6#!)"-4E0'D

?0ED+'()B(-C'DD-($F)"-4E0'D

G'+H>&'(I3)9#)"-4E0'D

2'(I1&IJ)"-4E0'D

2'(I1&I!)"-4E0'D

*1I1+/0D1I&/0'

@&/0-I')

./0-(1"'+'(D1I&/0'KLM#NNO

@&P/Q0)I'RE&4'&'(STU',+'

N:6%

N:6

N:#%

N:#

9)%([hD#%"'($&&`<(+M&A:%H,"<(%(k&;-<,<(%(&M&F+)"<(x%,/k&!+'/&M&_%-:%()%"&A(%"$#%

#(&643&µ/ QU

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idientifying:

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electrons, photons

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missing energy

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number of detected signals

Der Kalorimetertrigger

B('B(-C'DD-(6#!)"-4E0'D

?0ED+'()B(-C'DD-($F)"-4E0'D

G'+H>&'(I3)9#)"-4E0'D

2'(I1&IJ)"-4E0'D

2'(I1&I!)"-4E0'D

*1I1+/0D1I&/0'

@&/0-I')

./0-(1"'+'(D1I&/0'KLM#NNO

@&P/Q0)I'RE&4'&'(STU',+'

N:6%

N:6

N:#%

N:#

9)%([hD#%"'($&&`<(+M&A:%H,"<(%(k&;-<,<(%(&M&F+)"<(x%,/k&!+'/&M&_%-:%()%"&A(%"$#%

#(&643&µ/ QU

?0ED+'()B(-C'DD-($F)"-4E0'D

G'+H>&'(I3)9#)"-4E0'D

2'(I1&IJ)"-4E0'D

2'(I1&I!)"-4E0'D

V'/4-E+*(1W'(

6!)"-4E0'D

V'/4-E+*(1W'(

F)"-4E0'D

N:6%

N:6

N:#%

N:#

./0-(1"'+'(D1I&/0'

810')X(-&+'&4)>0'C+(-&1CD

5@()X(-&+'&4>0'C+(-&1CD)

V'C'1W'(6#!)"-4E0'D

ATLAS: L1 Kalorimetertrigger

@&P/Q0)I'RE&4'&'(STU',+'

Y)>0',+(-&'&HBQ-+-&'&Z)))))G'+DZ)['D/"+'&'(I1'Z)))))X'Q0'&4')>&'(I1'))))))

B('B(-C'DD-(6#!)"-4E0'D

Q5

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number of detected signals

Der Kalorimetertrigger•+*+,%("%)'H[<(a&&U7!>V/&Mm&837p>V/•&N37&A:%H,"<(#H&><+")/&&&O8U7&+'/&F%#)%:=%"$P•&87&`%"/G-#%)%(%&><+")&&&!0?%(•&C<::+=<"+[<(&+'/&37&&;-0/#H%"(

Qy

PreProcessor(Heidelberg)

M&8U7&A:%H,"<(#HH+",%(M&N777&!<G-,%"H+",%(M&p%.#/G-,%/&*%/#$(&&&&O+(+:<$V)#$#,+:PM&L29K&OC9;VF*P

XE&,\-&/01+]+)M&*#$#,+:#/#%"'($&M&1+'/G-h:,%"&O)#$#,+:PM&9(,%$"+[<(&)%/&;':/%/M&>%/[..'($&)%"&2,"+-:H"%'D'($

p

,-

,-

,-

,-

/&/0-I 41I1+/0

@ED0'D'

B(-P'DD-('&

Qo

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noisefilter

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determination of beam crossing

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functionality

ATLAS: Level 1 Muon-Trigger

;"%)%h(%)&?+r%"(/&&M&/?%G#+:&!"#$$%"&&&&:+0%"/&M&/%%)%)&_"<.&&&&.#)):%&:+0%"&M&)#t%"%(,&-+")E+"%&M&<`%":+?&"%.<`+:

N7

The Region of Interest Concept (RoI)

M&1<9&_<'()&=0&J8&,"+(/_%"%)&,<&J6M&J6&'/%/&<(:0&)+,+&E#,-#(&,-%&1<9&&&O6n&<_&,<,+:&+.<'(,&<_&)+,+PM&'/%)&#(&_'::&G<(/%j%(G%&=0&L!JL2

9(&?"#(G#?:%&+:/<&+`+#:+=:%&#(&K@2

N8

Trigger Chains/Paths and F+")E+"%

J6&G:'/,%"&+:$4

J6&,"+GH&+:$4

Ag&G:'/,%"&+:$4

Ag&,"+GH&+:$4

Ag&>"%.//,"+-:4&"%G<`%"0

M!-%&!"#$$%"&?"<G%//%/&,-%&&&)+,+&#(&K-+#(/V;+,-/&M&*%G#/#<(/&+"%&,+H%(&+I%"&&&%+G-&/,%?&+()&G-+#(/V?+,-/&&&+"%&/,<??%)&+()&%`%(,'+::0&&&%`%(,/&+"%&"%x%G,%)&M&At%G[`%:0&0<'&)#`#)%&,-%&&&FJ!&#(,<&+&fM:%`%:&!"#$$%"&&&/0/,%.M&|<'&$+#(&:<,/&<_&?%"_<".+(G%&&&E4"4,&+&/0/,%.&E-%"%&0<'&_'::0&&&&"%G<(/,"'G,&,-%&%`%(,

NQ

HLT AlgorithmsMm&L/&G:</%&,<&<}#(%&+/&?<//#=:%k&=',&/[::&_+/,

NN

!"#$$%"/,"+,%$#%

• !"#!$%&'()*+,-./-011– 2*//)%– $3$4– #5,6.780-+)– 9:6-0;*15<)*.<5<– ====

• $*/<068-5<– 9>5+6-.<5<?&'.6.<5<– @56)A%BCD56)– EF.<5<– "08– G5'>5<;5%9<5-/*5

• $6-065/*5

Trigger menu L1 (ATLAS)SE+4/+'4Z)UED+)R-()100ED+(/\-&)^E(^-D'D

NU

Trigger menu HLT (ATLAS)SE+4/+'4Z)UED+)R-()100ED+(/\-&)^E(^-D'D

N5

Trigger rates!-"%/-<:)/&#(&!"#$$%"&@%('/&+"%&G'""%(,:0&<?[.#/%)&'/#($&@K&/#.':+[<(/

X`%"+::&"+,%&#/&.</,:0&)<.#(+,%)&_"<.&~K*&)#x%,/

Mm&2,')0&)#t%"%(,&,"#$$%"/&+()&)#t%"%(,&?-0/#G/&?"<G%//%/&,<&<?[.#D%&&&&&+::&,-"%/-<:)/&+()&,<&G<(/,"'G,&,-%&_'::&.%(' Ny

Prescales]+A$q313%(+9"#$+'/3%:1$&' F<E&,<&-+():%&-#$-&

"+,%/&<_&:<E&A!&<=x%G,/v

Mm&#(,"<)'G%&:<E&,-"%/-M-<:)/&+()&+??:0&?"%/G+:%/

;"%/G+:%&;&&Mm&<(:0&,+H%&%`%"0&;,-&%`%(,

;<E%"_':&,<<:&,<&H%%?&:<E&A!&?-0/#G/&O"%)'G%)&"+,%k&:<E&%t%G[`%&:'.#PkMm&G+:#="+[<(&,"#$$%"/k&.<(#,<"&,"#$$%"/k&%,G&444

"%713'/:93A

713'/:93A

No

!"#$$%"%eD#%(D%(

AeD#%(D&&T&L(D+-:&)%"&$%,"#$$%",%(&{%,/&V&L(D+-:&+::%"&{%,/

AeD#%(D&_]"&)+/&,"#$$%"(&%#(%/&x%,/a

1%_%"%(D,"#$$%"a&&&&&&&&&&&&&&M&/<::,%&+'G-&+'_&x%,/&,"#$$%"(&&&&&&&&&&&&&&M&.'//&/%:=/,&(#G-,&877n&%eD#%(,&/%#(&&&&&&&&&&&&&M&WH:%#(%"Y&*+,%(/+,D&"%#G-,

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trigger efficiency

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triggering efficiency for one jet

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efficiency

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= number of triggered jets/number of all jets

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referencetrigger

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should be able to trigger jests

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doesn't have to be 100% efficient

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'smal' amount of data is sufficient

!"#$$%"%eD#%(D%(L!JL2a&@#(#.'.&>#+/&2G#([:+,<"

{%,M!"#$$%"&AeD#%(D

Measuring Trigger efficiencies8/I)/&4)^(-T'a&^Mm&µµ M&,+H%&%`%(,/&E#,-&,E<& &&&"%G4&<}#(%&.'<(/&Lf*& &&&,"#$$%"%)&=0&+&/#($:%&.'<(& &&&,"#$$%" M&)%,%".#(%&,-%&('.=%"&<_&%`%(,/& &&&f-Of\PE-%"%&8O6P&.'<(/&#//'%)& &&&,-%&,"#$$%"& M&g#,&,<&,-%&%4$&^&.+//&O#(G:')#($& &&&=+GH$"<'()&>-R\+)%,%".#(+[<(P

3Q

^'/+..%(_+//'($

• !"#$$%"&#/,&%#(&C<.=#(+[<(&'()&L(E%()'($&`<(&`%"/G-#%)%(%(&C<(D%?,%(– 2,"+,%$#%– F+")E+"%– 2<IE+"%

• AB?%"#.%(,/?%D#h/G-&

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summary (2)

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trigger uses various concepts

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depending on the experiment

Trigger und Datennahmesysteme

Documents

Transcript of Trigger und Datennahmesysteme