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LHC TAN forward detectors. Outline. Location in LHC Specificities Detectors purpose Modifications in the LHC tunnel Services. TAN study group, 21/09/2012 A. L. Perrot 1. Point 4. Point 5. Point 6. Point 3.3. CMS. BRAN, CMS ZDC. - PowerPoint PPT Presentation
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TAN study group, 21/09/2012 A. L. Perrot
LHC TAN forward detectors
Outline
Location in LHC
Specificities
Detectors purpose
Modifications in the LHC tunnel
Services
TAN study group, 21/09/2012 A. L. Perrot 1
Location in LHC
LHCf, BRAN,
ATLAS ZDC
Point 5
Point 6
Point 7
Point 8
Point 1
Point 3.3
Point 3.2
Point 2
CMS
Point 4
LHC-b
ATLAS
BRAN, CMS ZDC
BRAN,
ALICE ZDC
TAN study group, 21/09/2012 A. L. Perrot 2
Location in LHC
D2Q4
TAN
Q4D2
UJ13
UJ14
US15UJ16
UJ17
USA15
Q1Q2
Q3
D1
RI13
RI17
TAN
Q2Q3
D1
Q1
Point 1
XRP2
XRP3
XRP1
XRP2
XRP1
XRP3
D2
D2
Q4
Q4
TAN
TAN
Q2Q3
Q1
Q1Q2
Q3
D1
D1
USC55
UJ53
UJ57
R57
Point 5
3
In each TAN 1 slot with 10 movable Cu bars
Possibility to add instrumentation
Slot : l1000 x w95 x h605
Location in LHC
TAN study group, 21/09/2012 A. L. Perrot 4
LHCf
ATLAS ZDC
BRAN
TAN detectors Point 1
TAN detectors Point 5
HCAL
BRAN
ECAL
CMS ZDC
Location in LHC
LHCf: LHC forward physicsBRAN: Beam RAdiation Neutrals monitorZDC: Zero Degree Calorimeter
ECAL = Electromagnetic CALorimeterHCAL = Hadronic CALorimeter
TAN study group, 21/09/2012 A. L. Perrot 5
TAN detectors in Point 1
June 2009
LHCf
BRAN -ICBRAN-Sci
IP1
ATLAS ZDC HCAL
ATLAS ZDC ECAL
TAN study group, 21/09/2012 A. L. Perrot 6
TAN detectors in Point 5
CMS ZDC HCAL
IP5
CMS ZDC ECAL
BRAN -IC
TAN study group, 21/09/2012 A. L. Perrot 7
LHC experiments detectors located inside the LHC tunnel => coordination in LHC machine & experiments caverns/services areas
inside LHC machine absorbers TAN, located all together in 1m long slots & few
mm from the beam pipe;
designed & produced in Japans/Italy/USA to be inserted in very narrow locations inside already installed LHC equipment (few mm tolerances)
exchange/removal of TAN detectors during LHC operation => radiological issues
Specificities / challenge
TAN study group, 21/09/2012 A. L. Perrot 8
LHCf
Understanding high energy cosmic ray phenomena => (calibration of MC codes at 1017 eV (Elab. equiv of LHC)help to decide which model is best for MC simul. of HECR air showers)
Understanding of the energy distribution of particles emitted in the very forward region of hadronic interactions
LHCf will measure forward production spectra of photons and π° (and neutrons)
Simulation atmospheric shower due to 1019 eV proton
Purpose:
TAN study group, 21/09/2012 A. L. Perrot 9
silicon layers
scintillators
tungsten layers
scintillators
tungsten layers
scintillating fibers
I P1Detector #1 Detector #2
(RI132- left to IP1) (RI171- right to IP1)
TAN TAN
Courtesy of LHCf Firenze teamCourtesy of LHCf Nagoya team
1 detector in the TAN absorber on each side of Point 1 e.m. calorimeters with position sensitive layers
LHCf
TAN study group, 21/09/2012 A. L. Perrot 10
LHCf
TAN study group, 21/09/2012 A. L. Perrot 11
ATLAS Zero Degree Calorimeter
ZDC detector:- tungsten/quartz-fibers layers - 2 calorimeter sections: EM and hadronic- 1 detect.= 1 mod. EM + 3 mod. Had
Location:1 detec. in each TANs around of IP1
Primary role: - event characterization in HI collisions- obs. neutral partic. produced in HI or pp collisions
Secondary role: - luminosity measurement - beam tuning
PMT PMT
Top view
Beam
Quartz windowPMT XP3292B
Tungsten
1mm quatrzrods
Steel
Glass mirrorair light pipe
Quartz windowMAPMT R7600-M16 2x3x16ch
Beam
Quartz fibers
Quartz fibers
EM module
PMT PMT
Top view
Had. module
TAN study group, 21/09/2012 A. L. Perrot 12
ATLAS Zero Degree Calorimeter
Installation in 2 phases
without LHCfwith LHCf
TAN study group, 21/09/2012 A. L. Perrot 13
Beam RAte Neutrals monitor (BRAN)
Role: monitor and optimise the LHC relative luminosity on a bunch by bunch basis(idea: utilising the very forward flux of secondaries from IP that are intercepted by the TAN)
BRAN detector:- designed and built by Berkeley - work in collaboration with BE/BI- segmented, multi-gap, pressurized Ar-N2 ionisation chamber (4 quadrants; 1 quadrant: 60 gaps of 0.5mm separated by 1mm thick Cu plates)
Location: in both TANs on each side of IP1 and IP5
Courtesy of K. Chow- LBNL
TAN study group, 21/09/2012 A. L. Perrot 14
Peel off case
Remove copper filler bars
Detail of ionization
chamber area
BRAN – inside views
Courtesy of K. Chow- LBNL
TAN study group, 21/09/2012 A. L. Perrot 15
CMS Zero Degree Calorimeter
Role: - Heavy ions physics studies (A+A, p+A and p+p collisions )- Labs of p+p, p+A, A+A coll.,- stot of p+p and A+A coll.,
ZDC detector:- a tungsten plate/quartz fiber ribbon sandwich - 2 calorimeter sections: e.m. and hadronic- 1 detect= 1 EM sect.+ 4 equal had. sect.
Location: in both TANs on each side of IP5.
Courtesy of CMS/ZDC team
TAN study group, 21/09/2012 A. L. Perrot 16
CMS Zero Degree Calorimeter
ZDC hadronic module (inside view)
ZDC hadronic module (ready for installation)
ZDC hadronic module (inserted in the TAN slot)
TAN study group, 21/09/2012 A. L. Perrot 17
Modifications of the LHC machine
L<1033 cm-2 s-1:LHCf and/or the ATLAS ZDC => sufficient shielding of the machine elements
L> 1033 cm-2 s-1: LHCf and/or the ATLAS ZDC =>replaced by Cu bars to avoid the quench of D2
Radio Protection requirement: remote manipulation of the detectors/Cu bars and underground storage in the machine tunnel.
Safety requirement: footbridge above the QRL
TAN study group, 21/09/2012 A. L. Perrot 18
Removal of the detectors
Point 1 remote handling system March 2009
Point 5 remote handling system under constructionInstallation during LS1
TAN study group, 21/09/2012 A. L. Perrot 19
Storage of the detectors underground
Dedicated bunkers built in adjacent UJs
Sarcophagi for ZDCs Sarcophagi for BRANs
Dedicated bunkers built in adjacent UJs
TAN study group, 21/09/2012 A. L. Perrot 20
Paths followed by CMS ZDC cables
XRP2
XRP3
XRP1
XRP2
XRP1
XRP3
D2
D2
Q4
Q4
TAN
TAN
Q2Q3
Q1
Q1Q2
Q3
D1
D1
USC55
UJ53
UJ57
R57
Point 5
CMS-ZDC rack
UL55
laser room
TAN study group, 21/09/2012 A. L. Perrot 21
Footbridge above QRL
TAN study group, 21/09/2012 A. L. Perrot 22
Footbridge above QRL
TAN study group, 21/09/2012 A. L. Perrot 23
Associated services
Work performed on TAN: holes drilling for patch-panels installation of LHCf and BRAN (TS/IC,TS/LEA).
Cables and fibers • installed between TANs and racks located in ATLAS and CMS services
areas• different paths followed (depending of cable types);• compatibility with the cables already installed/foreseen for the machine
and the ATLAS experiment.• additional cable trays installed in LHC tunnel
Additional power plugs
BRAN: - gas installation and distribution (TS/LEA/gas section)• locked caged area + change over panel (Pt1-US15 and Pt5-UJ56)• gas distribution network between the caged area and the TAN
TAN study group, 21/09/2012 A. L. Perrot 24
LOCKED CAGE
TAN
Gas distribution at Point 1
Special agreement with safety dept. to have gas bottles underground
Associated services
BRAN:
TAN study group, 21/09/2012 A. L. Perrot 25
D2
Q4
TAN
Q4D2
UJ13
UJ14
US15UJ16
UJ17
USA15
Q1Q2
Q3
D1
RI13
RI17
TAN
Q2Q3
D1
Q1
Point 1
LHCF and ATLAS ZDC racks
road 1
road 2
Paths followed by LHCf and ATLAS ZDC cables
detectors
detectors
TAN study group, 21/09/2012 A. L. Perrot 26
LSS1
LSS1
UJ13
ATLAS exp. cavern
Cables trays for LHCf and ATLAS ZDC
TAN study group, 21/09/2012 A. L. Perrot 27
Thanks for your attention
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