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Richard Soluk – University of Alberta. MoEDAL LS1 Installation Plans. The LHCb VELO Region. Deployed Detectors – LT-NTDs. Each Low Threshold Nuclear Track Detector consists of multiple layers of CR39 and polycarbonate in a stack with guide dowels to ensure alignment. - PowerPoint PPT Presentation
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MOEDAL LS1 INSTALLATION PLANS
Richard Soluk – University of Alberta
R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21
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The LHCb VELO Region
R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21
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Deployed Detectors – LT-NTDs Each Low Threshold
Nuclear Track Detector consists of multiple layers of CR39 and polycarbonate in a stack with guide dowels to ensure alignment.
Stacks are sealed in aluminized mylar bags until ready for etching
R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21
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LT-NTD Mounting
Stacks (typically 6) are placed in aluminum trays and mounted on rails attached to concrete walls around the VELO area
Bar codes used to identify each stack
First 3 prototype trays installed November 2009
R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21
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Current LT-NTD Array
R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21
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Deployed Detectors - MMT
The Magnetic Monopole Trapper consists of a mass of aluminum
A magnetically charged particle that ranges out in the aluminum will be detectable by a magnetometer
Prototype consisted of 1” diameter aluminum rods located in front of the VELO below the beampipe
R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21
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MMT Prototype
R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21
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Deployed Detectors - Timepix Only active element 256x256 pixel solid
state detector 14x14mm active
area
R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21
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Timepix
One in forward direction near beamline other transverse to the IP
R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21
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New MMT Location
Located under the VELO within the VELO support stand framework
R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21
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New MMT Design
Square aluminum bars Bars held in flat trays
similar to those used for the LT-NTD stacks 2.54 x 2.54 x 19cm bars 12 rows of 3 bars per
row Approximately 12kg/tray
6 trays per layer 8 vertical layers Mass of bars 576kg
R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21
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MMT Supports
MMT not supported off the VELO frame but directly off the floor using aluminum blocks
Floor grid placed on top of blocks to form base for MMT
R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21
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LT-NTD Upgrade
All plastic was removed at the end of run 1
Will be replaced with new CR39/Makrofol stacks
New CR39 vendor identified since old production line no longer exists
R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21
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New LT-NTD Locations
Top of VELO cover Closest possible
location to IP Avoids having to
install on ceiling using scaffold
30 stacks
Underneath VELO on top of the new MMT Further from IP due
to pumps 12 stacks
R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21
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New Detector: HCC-NTD
Thin low mass detectors for highly ionizing particles
3 layers of 150μm Makrofol inside a 25μm aluminum foil bag
0.19% of a radiation length thickness
Can be taped to surfaces using kapton tape
R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21
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HCC-NTD on the Trigger Tracker Propose placing a HCC-
NTD on the downstream surface of the TT
Adds ≈0.5% to the LHCb material budget to that point
Inside the LHCb acceptance but after the VELO, RICH1 and TT measurements
R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21
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Additional Timepix
Cables will be installed now for 5 additional timepix
Routing is same as current timepix cables and does not conflict with LHCb cable runs
R. Soluk --- University of Alberta --- MoEDAL Collaboration Meeting --- CERN June 19-21
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Installation Schedule
