zeus experiment 2001
DESCRIPTION
ZEUS experiment 2001. Installation of Microvertex Detector Hera upgrade for higher collision rates Data analyses. Proposal, design and construction took 4 years February 2001 final transport from NIKHEF to DESY Feb/March full system test March 27th installation in ZEUS - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/1.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
ZEUS experiment 2001
• Installation of Microvertex Detector
• Hera upgrade for higher collision rates
• Data analyses
![Page 2: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/2.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
• Proposal, design and construction took 4 years• February 2001 final transport from NIKHEF to
DESY– Feb/March full system test– March 27th installation in ZEUS– July short cosmic run– December first collision(s)
Silicon Microvertex Detector
![Page 3: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/3.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
electrons protons
60 cm
32 cm
Layout Microvertex Detector
Cross section wheel Cross section barrel
Support cylinderdivided in 2 halves
=
=
![Page 4: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/4.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
Barrel Sensors
Detector side Hybrid side
2 half modules Ladder
![Page 5: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/5.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
MVD assembly
300 barrel half modules 112 wheel modules 30 ladders 8 half wheels
![Page 6: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/6.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
MVD assembly (2 halves)
![Page 7: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/7.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
MVD assembly (two halves)
![Page 8: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/8.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
Full System test
• 200 k readout channels have to function together• test final setup for the cabling• setting/monitoring low voltage front end readout• setting/monitoring bias voltage sensors• test complete readout chain analog datalink/ADC,
triggers for pedestals and testpulses• cooling • slow control monitoring• measure cosmics
• Full system operational, No bad surprises• about 1% of channels give problems
![Page 9: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/9.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
• Cosmic Ray setup at DESY
Scintillatortowers
Scintillatorplates forforward wheels
Scintillatorat the side
x-y plane z-y plane
Full System Test
![Page 10: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/10.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
• First Results Reconstruction Cosmic Rays
– Event display single track event
E.Maddox
Full System test
![Page 11: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/11.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
• First Results Reconstruction Cosmic Rays• Distribution of residuals track fit obtained
with default geometry, more survey data to be included.
Residual (mm)Residual (mm)
R Phi hits Z hits
Full System Test
![Page 12: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/12.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
• Response ‘inclined’ Tracks
clustersum
angle beta angle
angle alpha0 1.5 rad
1.5 rad0
clustersum
clustersum
Full System Test
![Page 13: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/13.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
Detailed Monte Carlo simulations exist for MVD
GEANT
Status of the new tracking software
MC tracks
Impact parameter resolution at vertex for fitted single tracks
E.Maddox
With MVD included!
Up to NOW,CTD only
xy
xy
z
z
0.4mm
0.07mm
2.2mm
0.08mm
![Page 14: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/14.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
Manifold water cooling(two mounted on top of eachother, input/output)
Polyurethane tubes
Stainless steel tube
MVD assembly (cooling)
![Page 15: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/15.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
• Monitoring Cooling system as function of Time (hor.scale hist. 12 hours)
Switch on low voltage
Water temp. (14C) Water press (1.6bar) Humidity in MVD
Temp. wheel ~23C
Temp. ladder ~18C Temp. ladder ~18CTemp. ladder ~18C
Temp. in MVD ~18C Temp. in MVD ~18CMonitor 1 Monitor 2
Cooling Performance
![Page 16: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/16.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
Inserted in front (proton side) Cables at the rear
MVD in ZEUS
March 27th 2001 in ZEUS Hall
![Page 17: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/17.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
4 years of design and construction work beautifully documented onweb page and put on CD by Marco Kraan
1 year assemblyand installation workcompiled on a 25’video byEls Koffeman
Documentation
![Page 18: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/18.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
Install quadrupoles near interaction pointinstall spinrotators, long.polarized e-beams
Luminosityx 5
1000 pb-1
end 2005
HERA +ZEUS upgrade
![Page 19: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/19.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
HELIX chips (AMS 0.8 CMOS) •tested up to 500Krad
• worse performances (S/N)• partly recoverable changing operation point
Radiation damage FE electronics
J.Velthuis
Single sensor
m
![Page 20: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/20.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
• irradiation from IP negligible•off momentum e- and e-
(<20 GeV)•Synchrotron radiation,
backscattered fromcollimators (<100 keV )complex pattern
•Proton beam loss (accidents)
Monitor radiation backgroundwith pin diodes near the beampipe inside the MVD.
34 mm
28 mm
diodes
Monitor Background Radiation
![Page 21: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/21.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
Proton structure -evolution equations -parton densitiesGluon radiation - first and higher orderHadronization - many MonteCarlo generators
‘hard scale’ : high Q2, high ET jets, high mass…...
What do we observe?
-Diffractive events-Deep inelastic scattering-multi jet events-heavy quark production….
DGLAP,BFKL,CCFM,MRS,GRV,CTEQnn,..
HVQDIS,DISENT,JETNLO,DISASTER,..
HERWIG,RAPGAP,EPSOFT,PHOJET,LEPTO,ARIADNE,CASCADE,PYTHIA,DJANGO,HERACLES….
Physics at HERA test and understanding QCD
![Page 22: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/22.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
322
22
4
2
2
2
))1(1())1(1(2
xFyFyFyxQdxdQ
dL
x fractional four-momentum of struck quarky inelasticity
Q2 four-momentum transfer squared e
N. Tuning(PhD thesis Sept.2001)
e
Proton structure function
![Page 23: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/23.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
N. Tuning
Highest x-bins
Proton structure function F2
![Page 24: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/24.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
HERA II: -improve high x,Q2 data - e-running, balance samples - progress theory (NNLO), better fits
Proton structure function xF3
322
22
4
2
2
2
))1(1())1(1(2
xFyFyFyxQdxdQ
dL
![Page 25: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/25.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
Any sign of charm production
πDD* S.Schagen.. ec
K
eOpen Charm Production in DIS
c2F
)M(Kπ)M(K-) M(K s
![Page 26: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/26.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
DD *.. ec
Kinematical quantities
S.Schagen
Open Charm Production in DIS
![Page 27: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/27.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
Contribution of charm to proton structure function F2
S.Schagen
Open Charm Production in DIS
![Page 28: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/28.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
Available data very still very scarce
Reconstruct jets and look for electrons or muonsin jet as function of
HERA II: + MicroVertex gives proper b- data + MicroVertex gives more c-decay channels, smaller Background, smaller kin extrapolations--> better measurement
Beauty Production in Photoproduction
relt
p
![Page 29: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/29.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
data? e versusein productionD differenceAny - *
More Open Charm Production in DIS
![Page 30: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/30.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
More Open Charm Production in DISNo special triggers requiredAll DIS events accepted
0KM
M 2KM3KM 00
-M
-M KK
-M KK
![Page 31: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/31.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
•Use the large number of D* collected in ZEUS (~31K)
•Select D+s1 D*+K0
S (K-++
S)(+-) + c.c.•From the well measured f(c D*+) we get the fragment. fraction f(c D+
s1)
.)%(14.0.)(.)(18.024.1)( 08.006.01 brsyststatDcf s
HERA: a Charm factory
Just an example
![Page 32: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/32.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
• D* production in diffractive DIS• Charm in Photoproduction vs NLO• Charm dijet photoproduction vs LO
and NLO• Huge D* sample in photoproduction
– charm fragmentation universal?– spectroscopy of D mesons– probe rare decays– ..
D*)f(c
Many new results
BUT HERA II + MicroVertex will do better + improved triggers
HERA: a Charm factory
![Page 33: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/33.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
![Page 34: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/34.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
![Page 35: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/35.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
![Page 36: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/36.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
![Page 37: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/37.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
![Page 38: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/38.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
322
22
4
2
2
2
))1(1())1(1(2
xFyFyFyxQdxdQ
dL
x fractional four-momentum of struck quark
Q2 four-momentum transfer squared
y inelasticity
W photon-proton centre of mass energy
22 kkQ
qp
Qx
2
2
kp
qpy
2kpW
Proton structure function
![Page 39: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/39.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
MVD assembly (two halves)
• Install Beampipe on lower MVD half• Carbonfiber tube surrounds Beampipe
– protection silicon– electrical shielding beam
• Turn upper MVD half upside down • Mount both halves together with help precision pins on
support frames• Connect both halves electrically and create Faraday cage
for the front end readout• keep supportframes attached until installation in ZEUS
![Page 40: ZEUS experiment 2001](https://reader036.vdocument.in/reader036/viewer/2022062323/5681591d550346895dc6454a/html5/thumbnails/40.jpg)
ZEUS
Dec
. 200
1 Nikhef Jamboree
Rear end MVD
Super conducting magnetburied in MVD cables
HERA +ZEUS upgrade