moedal ls1 installation plans

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