ATLAS Muon Phase 2 Resources Coordinator Page.

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 1<sup>st</sup> 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.

Introduction

Documentation

Major Procurements Via CERN

Item	wbs	date	DR/DAI	Institute	Total Value (CHF)	Total Value (€/$)	Deliverables Sharing (%)	Status	Budget
Aluminum tubes for sMDT	5.1.1.1	07/11/2019	https://edh.cern.ch/Document/SupplyChain/DepartmentRequest/8026465	UM(Michigan)	408,321	€381,680	UM(Michigan), 100	Completed	T525101
Aluminum tubes for sMDT	5.1.1.1	30/01/2020	https://edh.cern.ch/Document/SupplyChain/DAI/8139201	UM(Michigan)	408,321	€381,680	UM(Michigan), 100	Completed	T525101
Additional Aluminum tubes for sMDT	5.1.1.1	13/10/2021	https://edh.cern.ch/Document/SupplyChain/DAI/8931639	UM(Michigan)	47,352	€44,056	UM(Michigan), 100	Completed	T525101

ASD, additional 25 wafers	5.2.1.1	25/06/2020	https://edh.cern.ch/Document/SupplyChain/DAI/8319957	MPI	48,579	$51,200	MPI, 100	Completed	T525201
ASD non recurring costs (masks)	5.2.1.1	25/06/2020		MPI, Mainz(BMBF)	345,100		MPI, 38, Mainz(BMBF) 62	Completed
Connectors for flat cables	5.2.3.1	01/07/2020	https://edh.cern.ch/Document/SupplyChain/DAI/8328956	Mainz(BMBF)	20,381	€19,162	Mainz(BMBF), 100	Completed	T525203
Flat halogen-free cable	5.2.4.5	11/10/2019	https://edh.cern.ch/Document/SupplyChain/DAI/7990427	Hong Kong	175,546	159,660	Hong Kong, 100	Completed	T525100
Gas-Gaps	5.3.1	closing on Aug.3 2021	https://cds.cern.ch/record/2774725			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	5.3.3.4		https://cds.cern.ch/record/2791167			200, 000	INFN, 72, JINR, 28	DO-33060/EP/ATLAS, dead-line Jan.10th 2022
Photo incision of raw FR4 foils	5.3.3.4		https://edh.cern.ch/Document/SupplyChain/DepartmentRequest/9011953			200,000	INFN, 72, JINR, 28	Departmental Request
glue for RO planes	5.3.3.4					~20,000	INFN, 72, JINR, 28	Options being discussed
Nomex for RO planes	5.3.3.4					~50,000	INFN, 72, JINR, 28	Nothing done
Power System	5.8	closed 23 Feb.2021	https://cds.cern.ch/record/2750391			7076	Various	Market Survey MS-4661/EP/ATLAS completed, preparing the IT; discussion on how open the tender has to be (<end year?)

RPCPrototypes

-- BaroncelliToni - 2021-06-24