1
AFPATLAS Forward Proton Upgrade
Project
• AFP physics goals• AFP where and how• AFP plans• Work to be done:
Integration in the LHC (ECR, specifications, work packages, reviews, …)
Status of AFP components (pot, station, infrastructure, detectors)
• Conclusions
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Michael Rijssenbeek (PL)
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APPROVED
TO BE REVIEWED
(2017)
AFP Physics in Run 2 (and 3?)• Single Diffraction (a single forward proton, ‘stuff’ in center)
– large cross sections, ~mb– special, low-μ runs; β*=0.55 m or 90 m
• Central Diffraction (two forward protons, ‘stuff’ in center)– modest cross sections, ~nb– special μ~1 runs; β*=0.55 m or 90 m
• Central Exclusive Diffraction (two forward protons, and only dijet in center)– small cross sections, ~pb– standard runs; β*=0.55 m
• Di-Photon exchange (two forward protons, and only W+W– in center)– small cross sections, ~fb– standard runs; β*=0.55 m – Anomalous Quartic Gauge Couplings !
pp→pF jj XF (SD jj)
pp→pFXF jj YFpF (CD jj)
pp→pF + jj + pF (CED jj)
pp→pF + WW + pF
(DPhE)
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LHC Sector A6R1 (Q5 – Q6)
• Possible locations for the Roman pot stations:– limited only by QRL bellows and TCL6
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Possible RPS Locations Space reservation: D. Macina, LHC-XAFP-EC-0001-10-00 (11 Jun 2012)
ATLAS Forward Protons at 210 m
Hit pattern in AFP is determined by the LHC opticsFor β*=0.55 m:– upward tilt for protons with
energy loss is caused by vertical crossing angle in Point 1
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p/cm2/100 fb–1
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AFP Beam Interface• Horizontal Roman pot stations (a la TOTEM)
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AFP Roman pot
TOTEM Horizontal Roman pot assembly
ALFA Vertical Roman pot
station
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Status of AFP• AFP was approved as ATLAS Phase 1 Upgrade Project
in March.
• TDR vs 5.1 in CDS, finished in Collaboration review:ATL-COM-UPGRADE-2015-006 at https://cds.cern.ch/record/1999192
• Funds in place for AFP0+2 (two stations in Right arm)
– funds for AFP2+2 under discussion
• Draft TDR was presented to LHCC in March 3
• Final LHCC approval expected June 3
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AFP PlansStart with: Single Arm, 2 Roman Pot Stations• Earliest opportunity to install: Winter 2015-16 SSD
– AFP Beam Pipe section ~10 m– RP Stations + BPM– Cables– Vacuum, Cooling
• Tracking detectors (SiT)– 4 planes of 3-D Silicon Pixels; edgeless (190 um)– provide L1 Trigger from FE-I4 HitOR outputs (e.g. 3 planes out of 4)– SiT can be installed during a short (6 hr) access
• NO Time-of-Flight (ToF) for AFP0+2– ToF not needed/useful for 1-arm physics …
• only for study of time structure of backgrounds …
install only if the rest is done !
Complete: Two-Arm AFP2+2: in Winter 2016-2017 (19 wks)
LHCC 3MAR2015 7
a VERY large job in VERY little time !
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AFP PlansConsiderations:– Winter 2015-16 shut down is VERY short – may not be able to
install …– time to Dec’15 is VERY short – may not be able to commission
and certify 2 stations …– But:
• Winter 2015-16 shutdown length is uncertain; may be longer (or shorter!). We should be prepared to take advantage …
• Anything (cables, patch panels, beam pipe mods) that can be installed will reduce load for Winter 2016-17 shutdown …
• Keep AFP momentum going …• Huge pay-off IF we can install even one station and detector:
– gain crucial operational experience ! both for AFP and LHC– measurements of backgrounds !– early physics …
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Run 2 and BeyondPlans for Run 2:– AFP0+2 in 2015/16 SSD (?); AFP2+2 in 2016/17– Special high β* runs in 2016-2017– Standard optics runs to measure environment
Participate in Run 3 if:– standard optics
works for AFP (review)
– High Lumi AFP program is approved (review)
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Run 1
Run 2
Run 3
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Resources, Work Packages, etc.
• EN-MEF support requested– integration in the tunnel (Y. Muttoni et al.):
• beam pipe modifications• cabling (V. Canale)• cooling, sec. vacuum
–ECR in preparation
• PH-DT support requested–consultations with experts (X.Pons, C.Bault)–work package/description of “Motorization” (motion, motors and
controls)
• TE-VSC–10 m of NEG-coated beam pipe (TE-VSC-BVO, G. Bregliozzi)
• Manpower:–AFP Technical staff (3.5 FTE)–ATLAS-TC Technical staff (~1 FTE)TREX 23APR2015
AFP Contact: M. Rijssenbeek, Chris Ng
AFP Contact: P. Sicho
AFP Contact: P. Sicho, M. Rijssenbeek, Chris Ng
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Integration into the LHC–LHC Tunnel: AFP Beam
Layout:–Locations of patch panels,
crates, cooling, pumps, – to be specified in the AFP
ECR …
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6L1 Region
TCL6
Table 1. Sector A6R1 LayoutFrom IP
[m]Length
[m]Name Note
200.301 0.655 VABSA.6R1.C End of Q5200.956 0.461 VCDDD.6R1.B201.417 0.300 VMAAB.6R1.B Bellow 0.3m201.717 3.119 VCD204.836 0.332 XRP.A6R1 XRP Center: 205.002205.168 0.285 VCD Placeholder for possible Strip BPM205.453 0.200 VMAAA Bellow 0.2 m205.653 3.064 VCD NEG coated beam pipe208.717 0.300 VAMFD.6R1.B VMAAF with VAZAG,VAZAE,VAZBD209.017 7.619 VCD VPIA? VGPB?216.636 0.200 VMAAA Bellow 0.2 m216.836 0.332 XRP.B6R1 XRP Center: 217.002217.168 0.285 BPMSX Strip BMP217.453 0.300 VMAAF Bellow with VPIA217.753 0.000 Placeholder217.753 0.520 VAMTK.A6R1.B218.273 1.480 TCL.6R1.B1 TCL6219.753 0.460 VAMTE.6R1.B220.213 3.104 VCDRZ.C6R1.B223.317 0.655 VADHB.6R1.C223.972 Start of Q6
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ECR in the works …1. Purpose2. AFP detector interface
a. Roman potsi. Descriptionii. RF compatibilityiii. Vacuum compatibilityiv. Cooling
b. Roman pot stationsi. Descriptionii. Motorization and motion controlsiii. Floor locations and drill patternsiv. Beam Position Monitor
c. Integration in the LHCi. New layout of the 6R1 sub-sectorii. Dummy beam pipe sectionsiii. Beam loss monitors
3. Servicesa. cables:
i. Types and numbersii. Start/end locations & connectorsiii. Patch panels, connectors & locations
b. Secondary vacuumi. Connections to ALFA vacuum racks (RR-13)
c. Cooling systemi. Dry compressed air for vortex cooling
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Contents:
??
?
?
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ECR in the works …4. Roman pot station interlocks
a. integration with ATLAS/ALFA interlock systemb. rad monitors
5. Impactsa. On operational safety
i. “Element Important de Securite”ii. Other operational safety aspects
b. On other itemsi. LHCii. Impact on utilities & servicesiii. Impact on costsiv. Impact on schedulev. Impact on performance
6. Worksite safetya. Organizationb. Regulatory testsc. Special risks
7. Follow-up Actions8. References
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Contents:
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Status: Roman Pot• Roman pot raw material:
– 316LN 3D forged steel: Purchase Order in preparation– 2 UHV fixed flanges 295/235 mm purchased (18.60.19.295.5, CHF
615.00/ea)
• Pot production:– U Alberta (Chris Ng)– 1 prototype, 4+1 production pots– certification: CERN
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• Pot design:– U Alberta (Chris Ng)
Roman PotAFP pot very similar to TOTEM pot
–cylindrical: good RF behavior (≲1% of LHC impedance at few mm)
AFP detectors require a flat inside bottom in the pot– thin window machined on the beam side –different from
TOTEM pot–design & simulations done: satisfactory (<70% of elastic limit)–prototype in 5-10 weeks?
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0.8 mm maximum bulge (vacuum in LHC and 1 atm in
pot)
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Status: Roman Pot Station• Roman pot station:
–Manufacturer: Vakuum Praha–Technical Specification is written–Single-source PO in preparation:
• drawings package being finalized (~done)• final drawing review in 2 weeks• single-source justification written & funds in place
–1 prototype, 2+2 production stations
• Work Package to describe:–Mechanical tests of RPS Chris Ng, MR
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Roman Pot stationAFP Roman Pot station:
– Replicate TOTEM horizontal station• reliable and proven design• external manufacturer
– Interface to ALFA pedestal drawing modifications in work …
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Beam pipeBellowRoman pot
Motor drive
Rails
Slide
Vacuum Compensation system
TOTEM
ALFA
Support Bracket
Support Frame
Support Tripod
Beam Pipe
Reduce height by 32 mm
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Roman Pot StationTechnical Specification:–basis of the RPS purchase order
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+ 27 more …
Status: InfrastructureBeam instrumentation (contact: MR):– BPMSX (+DOROS) at 217 m station– beam loss monitors (LHC)
Infrastructure (contact: Petr Sicho):– Cooling for pots and detectors (dry air, 9 bar/400 L/min)– Secondary vacuum (tap into ALFA syst.)– Cables & Patchpanels:
• fast air-core cables for Trigger, Reference Clock• TDAQ Optical fibers• HV cables• LV cables• DCS CanBus cables• Optoboard Power VVDC• Station motion control• BPM signals
DCS (contact: E. Banaś):– Secondary pressure– Cooling air pressure– Temperatures
• pots, detectors, air,crates, regulators
– Voltages and currents
LHCC 3MAR2015 19Elzbieta Banaś
AIRCOOLER (Vic Vacek)
define:
~2
weeks
In the Pot: 3D Silicon Pixel Tracker
Requirements:– Resolution: σx=10 μm, σy=30 μm
– edgeless ≲200 μm
+ for high luminosity:– Radiation hard: 5×1015 p/cm2/100 fb–1
– must handle very non-uniform irradiation
ATLAS IBL technology:– 3D pixel sensors:
• 336 × 80 of 50 μm (x) × 250 μm (y)• after cut: efficient to 100-150 μm
– FE-I4b readout ASIC• rad hard – tested up to 2.5 MGy
and 5×1015 1 MeV-eq n/cm2
– non-uniform irradiation testsfew×1015 p/cm2 successful
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3D CNM pixel sensor and saw cut
In the Pot: Time-of-Flight Detector
Requirements:– high resolution: σt ≤10 ps
– high rate: ≤5 MHz– radiation hard (100-300 fb–1)– long life PMT– segmentation in x (~ξ )– L1 Trigger capability
– low mass: 1.8%λint/bar
Long-life, high-rate MCP-PMT–25 mm ×25 mm; 4×4 pixels–manufacturer: Photonis
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pdif
f
Al mirror
θC
MCP-4×4-PMT
6 mm
Radiator Design: “LQbar”– each bar σt ≤ 30 ps
– 4 independent bars: ≤15 ps
Summary• ATLAS/AFP looks forward to collaborating on the
integration of the AFP detectors in the LHC • tight collaboration is crucial to successful installation• AFP very much welcomes any suggestions and
comments from the “Tunnel Region” experts!• Please contact AFP PL: [email protected]
LHCC 3MAR2015 23
ATLAS Forward Protons
3-D Silicon Pixel TrackerTrigger:– AND of 3 planes (FE-I4 HitOR)
DAQ:– RCE-based (AdvancedTCA)– used for IBL stave testing– worked VERY well in test beam!
Performance:– Efficiency ≥98%/plane
(will be higher with 13° tilt)– 98% single track events,
0.4% empty triggers– Track CoG resolution:
σx=7 μm, σy=36 μm
Production Status:– Sensors cut, Under Bump Metallization done– FE-I4 in house, to be sent for UBM– Flexes to be designed critical path– Sensor card and holder: to be designed critical path
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Setup in test beam Nov 2014 CERN SPS
Beam Test: Time-of-Flight Detector
– Sit-ToF correllation: excellent (but some X-talk) ToF efficiency: >99%
– Resolution: ~30 ps (Oscilloscope)
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A B (6 mm)
1A 1B
2A 2B
3A 3B4A 4B
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AFP organization– AFP is a FWD Upgrade Project
• with its own PL (and deputy PL)• PL elected for 2 yrs or until AFP
is installed, whichever comes earlier– MR Endorsed
• After installation: merge with ALFA
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FWD PLM. Bruschi
LUCID ALFA AFP
AFP PLM.Rijssenbee
k
Physics C
C. Royon, R.
Staszewski
Project E.
Ch. Ng
DQD. Caforio
Deputy PL
J. Pinfold
OpticsM. Trzebinski
Diffraction
L. Adamczyk
Soft/SimM. Dyndal
DCSE. Banas
DAQK. Korcyl
TriggerL. Adamczyk
Run/TB C
J. Lange RPSProject Eng.
Roman Pot
Project Eng.ToFT. Sykora
SiTS. Grinstein
CoolingV. Vacek
Installation
P. Sicho
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Technical ManpowerAt CERN– 0.5 FTE of Project engineer
• 6 months at CERN in 2015, and again in 2016 :– Christopher Ng (Alberta)
– 1.5 – 2 FTE of (Senior) Technician• 6 months at CERN in 2015, and again in 2016; possibilities:
– Richard Soluk (~0.5 FTE, Applied Physicist, Alberta)– David Northacker (~0.5 FTE, Mech. Tech. (MT), Stony Brook)– Giulio Avoni (~0.3 FTE ??* ET/MT, Bologna)– Giuseppe Fiore (~0.3 FTE ??* MT, Lecce)– Paul M. Davis (~0.2 FTE, Elec.Eng., Alberta)
*) to be discussed with and agreed upon by Bologna and Lecce group responsibles
– 2-3 Graduate/Master Students• ≥ 3 months at CERN in 2015, and again in 2016• list of tasks to be defined by MR
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TDR Cover ?Cover First page
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CERN-LHCC-2015-0xxATLAS TDR xx20 May 2015
CERN-LHCC-2015-0xxATLAS TDR xx20 May 2015
AT L A SForward Protons
Te c hn i c a l De s i gn Re po r t
T D R
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EN-MEF Support, …• EN-MEF Support for AFP Roman pot station (RPS) Integration in the LHC 6R1 (and
6L1) regions between Q5 and Q6 quadrupoles. This support consists of:– Installation drawings for sectors 6R1 (and 6L1):
• RPSs to be located at positions (to be confirmed!) z=±204.8 m (near), z=±216.8 m (far) away from IP1.
• BPM (type to be determined), 0.285 m long, immediately after the far station, directly connected to flange,
• Dummy beam pipe sections of 0.332 m long that take the place of the Roman pot stations• Bellows (with RF fingers) where appropriate,• Pump ports where appropriate,• Beam pipe sections (NEG coated) where appropriate (TE-VBO), beam pipe supports where
appropriate
– Cable Installation for AFP Between AFP and USA15:• Cable list (preliminary list see Petr’s talk):• Installation period: Winter 2015-16 Short Shutdown ?
• Chris Ng will do the modifications in design drawings of the support of the Roman Pot stations:– Small design changes needed to adapt the ALFA support to the TOTEM Horiz. RPS.
Affected EDMS drawings are: • ATLUR___0067 Roman Pot Support (ALFA Vertical Roman Pot Station)• ATLUR___0053 Roman Pot Support Base Plate (ALFA Vertical Roman Pot Station)• LHCXRP__0133 Roman Pot Support Lateral Wall (TOTEM Horizontal Roman Pot Station)
– Modified drawings needed for the Purchase order, which is on the critical path for AFP installation.
• Review of the final drawing package before PO to Vakuum Praha:– committee of experts (including ALFA expert)– in a few weeks at the latest … (early May, before Copenhagen mtg?)
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PH-DT Support• PH-DT support for AFP Roman pot station (RPS)`Motorization’:
– PH-DT will provide a short document describing work/costs for purchase and commissioning of motorization, controls, DCS, and infrastructure for RPS
– Payment for these AFP CORE items will come from AFP account T537124 (Roman pot)
• ATLAS-TC and PH-DT assistance with Purchase Order for prototype Roman Pot Station to VAKUUM PRAHA. – Chris will modify the 3 RPS support drawings– we need a committee review of full drawing package before ordering (1-2 weeks?) . See
Table of Drawings in ATL-U-ES-0xxx_SpecsAFP-RPS.
• PH-DT technical/instrumentation short-term consultation assistance:– Consultation will be on an as-needed basis with technical expertise. – The final responsibility for the tests will lie with AFP (Rijssenbeek, Chris Ng, Pinfold;
applied physicist R. Soluk; Technicians G. Avoni and D. Northacker). In addition, ATLAS TC may provide a full-time Technician.
– Types of tests foreseen:• UHV testing (Pumps, He Leak test), • RF testing (RF signal instrumentation), • survey and motion testing (LEICA Laser survey system, Motorization items above),• Thermal loading of the Roman pot and ferrites,
• Cabling inside the tunnel by CERN-EN, inside cavern and USA15 by ATLAS-TC• Thermal Simulations of 3D Silicon sensors and FE-I4 Frontend chip for cooling in
the secondary vacuum of the Roman pot ?
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Other CERN Support• TE-VSC: (Technology – Vacuum, Surfaces and Coatings)
– Vacuum:• Advice on placement of UHV beam pump port(s) and pumps placement(s) in AFP beam pipe• local primary vacuum monitoring, interlock, …• Advice on secondary vacuum pump: type, monitoring, ...• Advice on NEG coatings
– LHC Acceptance tests:• Prototype Roman pot (leak test, outgassing)• Production pots and ferrites (leak test, outgassing)• Ferrites: high-temperature bake-out• Acceptance testing of Roman pot stations (leak test, outgassing, bake-out)• In-situ bake-out
• TE-MPE: (Technology – Machine Protection and Electrical Integrity)– AFP Interlocks (ongoing):
• ATLAS TC (Siegfried Wenig) & AFP (Rijssenbeek) & TE-MPE (R. Schmidt, M. Zerlauth) are providing the AFP LHC Interlock systems.
• Annecy has agreed to duplicate the ALFA interlock logic board for AFP; LHC will provide the interface instrumentation.
• BE-BI: (Beams – Beam Instrumentation)– Beam Loss Monitors (BE-BI-BL)
• Acquisition, locations, installation, cabling, readout, …
– Beam Position Monitors (BE-BI-QP)• BPMSX: strip BPM, 80 mm aperture, 285 mm long, with DOROS Data Acquisition system for best
accuracy• Meeting on Wednesday 7:30 …
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