Levan Babukhadia
description
Transcript of Levan Babukhadia
Levan BabukhadiaLevan Babukhadia
D Collaboration Meeting, January 12 - 14, 2000, FermilabD Collaboration Meeting, January 12 - 14, 2000, Fermilab
http://www-d0.fnal.gov/~blevan
Level 1 FPS Algorithm RevisitedLevel 1 FPS Algorithm Revisited
SUNY at Stony BrookSUNY at Stony Brook
DØ Collaboration Meeting, January 12 - 14, 2000, Fermilab Levan Babukhadia
FPS ReadoutFPS Readout
16 FPS 22.5o -sectors4 layers of U- & V-strips
Shower: 144 U- & V-stripsMip: 103 U- & V-stripsSpecial: 72 U- & V-strips
Total max ~500 analog signals per FPS -sector
Two FPS -sectors Two Analog Front End (AFE) boards on a single VLPC cassette.High and Low SIFT thresholds set at AFE output (~doubles the # of analog signals).
DØ Collaboration Meeting, January 12 - 14, 2000, Fermilab Levan Babukhadia
L1FPS ArchitectureL1FPS Architecture
L2 PSpp
8N
7N
6N
5N
D4N
DB 3N
DB 2N
DB 1N
F
P
SNORTH
DB 6S
DB 5S
DB 4S
DB 3S
DB 2S
DB 1S
F
P
S SOUTH DB 7S
DB 8S
16
16
N UL3
N V L3
S UL3
S V L3
L1ftp
L3
DØ Collaboration Meeting, January 12 - 14, 2000, Fermilab Levan Babukhadia
Truncation in L1FPSTruncation in L1FPS
Possible truncation problems at the Digital Daughterboard and the Collector boardTo address this question study cluster multiplicities in MC
AFE
AFE
FPS -wedge
FPS -wedge
DB
DB
DFE COL
to L1 via BC
Glink to L2
5
5
1
11
Max # of Clusters 18for L2
Max # of Clusters 48
DØ Collaboration Meeting, January 12 - 14, 2000, Fermilab Levan Babukhadia
Cluster Occupancies from MCCluster Occupancies from MC
Dijets + 2MB MC with full detector simulation
High SIFT threshold at 5 mips
Excellent agreement withprevious results ( DØ Note 3493 )
DØ Collaboration Meeting, January 12 - 14, 2000, Fermilab Levan Babukhadia
Cluster OccupanciesCluster Occupancies
Dijets + 2MB MC with full detector
simulation
Low SIFT threshold at 3 mips
ET: 5 - 10 GeV ET: 10 - 20 GeV
ET: 20 - 40 GeV ET: 40 - 500 GeV
DØ Collaboration Meeting, January 12 - 14, 2000, Fermilab Levan Babukhadia
Title:ps/di_et3_mip05_vclusters.epsCreator:HIGZ Version 1.23/07Preview:This EPS picture was not savedwith a preview included in it.Comment:This EPS picture will print to aPostScript printer, but not toother types of printers.
Title:ps/di_et4_mip05_vclusters.epsCreator:HIGZ Version 1.23/07Preview:This EPS picture was not savedwith a preview included in it.Comment:This EPS picture will print to aPostScript printer, but not toother types of printers.
Title:ps/di_et1_mip05_vclusters.epsCreator:HIGZ Version 1.23/07Preview:This EPS picture was not savedwith a preview included in it.Comment:This EPS picture will print to aPostScript printer, but not toother types of printers.
Title:ps/di_et2_mip05_vclusters.epsCreator:HIGZ Version 1.23/07Preview:This EPS picture was not savedwith a preview included in it.Comment:This EPS picture will print to aPostScript printer, but not toother types of printers.
Cluster OccupanciesCluster Occupancies
Dijets + 2MB MC with full detector
simulation
High SIFT threshold at 5 mips
ET: 5 - 10 GeV ET: 10 - 20 GeV
ET: 20 - 40 GeV ET: 40 - 500 GeV
DØ Collaboration Meeting, January 12 - 14, 2000, Fermilab Levan Babukhadia
Title:ps/djx6_et4_mip03_vstrips.epsCreator:HIGZ Version 1.23/07Preview:This EPS picture was not savedwith a preview included in it.Comment:This EPS picture will print to aPostScript printer, but not toother types of printers.
Title:ps/djx6_et4_mip03_uclust_vs_vclust.epsCreator:HIGZ Version 1.23/07Preview:This EPS picture was not savedwith a preview included in it.Comment:This EPS picture will print to aPostScript printer, but not toother types of printers.
Dijets MC with 6 MBDijets MC with 6 MBTitle:ps/djx6_et4_mip03_vclusters.epsCreator:HIGZ Version 1.23/07Preview:This EPS picture was not savedwith a preview included in it.Comment:This EPS picture will print to aPostScript printer, but not toother types of printers.
Title:ps/djx6_et4_mip03_vwidths.epsCreator:HIGZ Version 1.23/07Preview:This EPS picture was not savedwith a preview included in it.Comment:This EPS picture will print to aPostScript printer, but not toother types of printers.
Worst case: highestdijet Et 40-500 GeV
andlow SIFT threshold
at 3 mips
Also shows we aresafe at the Collector
board truncation
DØ Collaboration Meeting, January 12 - 14, 2000, Fermilab Levan Babukhadia
Title:ps/di_et3_mip03_vstrips.epsCreator:HIGZ Version 1.23/07Preview:This EPS picture was not savedwith a preview included in it.Comment:This EPS picture will print to aPostScript printer, but not toother types of printers.
Title:ps/di_et4_mip03_vstrips.epsCreator:HIGZ Version 1.23/07Preview:This EPS picture was not savedwith a preview included in it.Comment:This EPS picture will print to aPostScript printer, but not toother types of printers.
Strip MultiplicitiesStrip MultiplicitiesTitle:ps/di_et1_mip03_vstrips.epsCreator:HIGZ Version 1.23/07Preview:This EPS picture was not savedwith a preview included in it.Comment:This EPS picture will print to aPostScript printer, but not toother types of printers.
Title:ps/di_et2_mip03_vstrips.epsCreator:HIGZ Version 1.23/07Preview:This EPS picture was not savedwith a preview included in it.Comment:This EPS picture will print to aPostScript printer, but not toother types of printers.
Dijets + 2MB MC with full detector
simulation
Low SIFT threshold at 3 mips
ET: 5 - 10 GeV ET: 10 - 20 GeV
ET: 20 - 40 GeV ET: 40 - 500 GeV
DØ Collaboration Meeting, January 12 - 14, 2000, Fermilab Levan Babukhadia
Title:ps/di_et3_mip03_vwidths.epsCreator:HIGZ Version 1.23/07Preview:This EPS picture was not savedwith a preview included in it.Comment:This EPS picture will print to aPostScript printer, but not toother types of printers.
Title:ps/di_et4_mip03_vwidths.epsCreator:HIGZ Version 1.23/07Preview:This EPS picture was not savedwith a preview included in it.Comment:This EPS picture will print to aPostScript printer, but not toother types of printers.
Cluster WidthsCluster WidthsTitle:ps/di_et1_mip03_vwidths.epsCreator:HIGZ Version 1.23/07Preview:This EPS picture was not savedwith a preview included in it.Comment:This EPS picture will print to aPostScript printer, but not toother types of printers.
Title:ps/di_et2_mip03_vwidths.epsCreator:HIGZ Version 1.23/07Preview:This EPS picture was not savedwith a preview included in it.Comment:This EPS picture will print to aPostScript printer, but not toother types of printers.
Dijets + 2MB MC with full detector
simulation
Low SIFT threshold at 3 mips
ET: 5 - 10 GeV ET: 10 - 20 GeV
ET: 20 - 40 GeV ET: 40 - 500 GeV
DØ Collaboration Meeting, January 12 - 14, 2000, Fermilab Levan Babukhadia
Proposed Changes in L1FPSProposed Changes in L1FPS
Knowing which - (0.2x0.2) triggertower the FPS cluster is associated withis one way to handle truncation without
introducing physics bias.
To achieve this, U- and V-signals mustbe handled by a single DFE DB
this requires some changes in the cableroutings between AFE and DFE.
Next, the trigger equations allow to dothe - “matching” of identified
U- and V-clusters.
As an example, EQ8 = V8 ( U9 U10 U11 ), when true, will unambiguously identify a cluster as belonging to the trigger tower 2 - 1
V8
U11
U10
U9
DØ Collaboration Meeting, January 12 - 14, 2000, Fermilab Levan Babukhadia
SummarySummary
The MC studies indicate we do not have a problemin L1FPS DFE truncation at 18 H&L clusters.
Still, the proposed modifications in:
(a) cable routings between AFE and DFE to allow U-V “matching” in DFE DB
&(b) L1FPS DFE algorithm to allow the determination of the - trigger tower
assoiciation of the L1FPS cluster
are to be implemented.
As a result, the truncation is not expected to be a problem even in higher background environment during actual running.