ATLAS Muon Phase 2 Resources Coordinator Page.


ATLAS Muon Spectrometer

Muon Upgrade Phase II

The ATLAS muon spectrometer is operated in a large background of neutrons and γ rays. In order to cope with background counting rates of up to 15 kHz/cm 2 the so-called ``small wheel'' will be replaced by a new small wheel (NSW) with chambers with increased high-rate capability in the long shutdown 2. The other muon spectrometer upgrades will be carried out in long shutdown 3. In the NSW small strip TGCs (sTGCs) will be used for triggering while MicroMegas will be used for precision tracking and a refined muon momentum measurement at trigger level. The big wheel's TGCs closest to the beam pipe will be replaced with TGCs with higher spatial resolution to increase the selectivity of the 1st level muon trigger. New thin-gap RPCs will be added to the inner barrel layer to close acceptance gaps of the barrel muon trigger. To free space for the RPCs MDT chambers will need to be replaced by so-called ``sMDT chambers'' which are drift-tube chambers with 15 mm diameter tubes instead of 30 mm diameter tubes. In order to identify muons within the whole acceptance of the upgraded inner detector of |ηl<4.0 a muon tagger will be added close to the beam pipe between the forward calorimeter and the shielding disk of the NSW. Finally the new trigger architechture will require new on- and off-chamber electronics.



Major Procurements Via CERN

Item wbs date DR/DAI Institute Total Value (CHF) Total Value (/$) Deliverables Sharing (%) Status Budget
Aluminum tubes for sMDT 07/11/2019 UM(Michigan) 408,321 381,680 UM(Michigan), 100 Completed T525101
Aluminum tubes for sMDT 30/01/2020 UM(Michigan) 408,321 381,680 UM(Michigan), 100 Completed T525101
Additional Aluminum tubes for sMDT 13/10/2021 UM(Michigan) 47,352 44,056 UM(Michigan), 100 Completed T525101

ASD, additional 25 wafers 25/06/2020 MPI 48,579 $51,200 MPI, 100 Completed T525201
ASD non recurring costs (masks) 25/06/2020   MPI, Mainz(BMBF) 345,100   MPI, 38, Mainz(BMBF) 62 Completed  
Connectors for flat cables 01/07/2020 Mainz(BMBF) 20,381 19,162 Mainz(BMBF), 100 Completed T525203
Flat halogen-free cable 11/10/2019 Hong Kong 175,546 159,660 Hong Kong, 100 Completed T525100
Gas-Gaps 5.3.1 closing on Aug.3 2021     1.400,000 INFN, 50, MPI, 50 Market Survey MS-4684/EP/ATLAS will be closed on Aug, 03 2021; ongoing discussions with MPI; small fraction procured not via CERN?  
first batch of Backelite (25%) 5.3.1         60,000 INFN, 50, MPI, 50 Being discussed. DAI in ~September?  
FR4 raw foils for BIL RO planes     200, 000 INFN, 72, JINR, 28 DO-33060/EP/ATLAS, dead-line Jan.10th 2022  
Photo incision of raw FR4 foils     200,000 INFN, 72, JINR, 28 Departmental Request  
glue for RO planes         ~20,000 INFN, 72, JINR, 28 Options being discussed  
Nomex for RO planes         ~50,000 INFN, 72, JINR, 28 Nothing done  
Power System 5.8 closed 23 Feb.2021     7076 Various Market Survey MS-4661/EP/ATLAS completed, preparing the IT; discussion on how open the tender has to be (<end year?)  


DAI date Issued by Item Total Value (CHF) Total Value () Share among budgets (CHF)
8651776 24/02/2021 G.Aielli ATLAS RPC's prototypes for phase 2 19500 17679.2 12090 (T529530),7410 (T192700)

-- BaroncelliToni - 2021-06-24

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Topic revision: r16 - 2022-08-24 - BaroncelliToni
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