1. CMS Muon Chambers Long term studies at GIF++ Andrey Marinov On Behalf of Long Term Studies of the CMS Muon Detectors 1

2. Outline GIF++ Schedule and overview Available Infrastructure Testing the CMS Muon Detectors 2

3. Schedule 3 D. Pfeiffer (EN-MEF-LE) – 17/10/2012 FINISHED: Tender documents ready ONGOING: First draft ready to be circulated STARTED: Discussions with users about DAQ ONGOING: Bunker design (false floor, roof, cable trays) about to be finished 13/02/2013 Mid March 2015

4. H4 – PPE 154 4 Maintain possibility for H2 extension Maintain minimum 2m wide corridor (central)

5. GIF++ implementation 5

6. GIF++ Geometry 6 roof chamber Irradiator with filter frame floor chamber Steel floor (2 cm) Finetracking chamber Irradiator with lead filters RPC chambers surrounded by 4 cm of steel Floor chamber also covered by 17 cm of steel Beam trigger shielded by 5mm Tungsten rubber Roof chamber shielded by 2 cm lead plate in air Lead shield for roof chamber Beam trigger

7. GIF++ 3D View Beam 7

8. Expected Rates Expected photon rate: 400 kHz without shielding (top tracker) Smart shielding solution under study Old calculations made on the usage of Irradiator Cs-137 10Tbq 8

9. Collimation window and source Collimation window pyramid shape (converges in center of source in one point) Collimation window trapezoid shape (schematic drawing, angles should be +/-37 ° horizontally and vertically ) 9 Side view Top view LeadSteel 137 Cs Air Trapezoid shaped Pyramid shaped Using the planned Cs-137 16.6Tbq

10. Pyramid shaped collimator yz 10 Point source Cylindrical source Large difference between point and cylindrical source

11. Trapezoid shaped collimator yz 11 Point source Cylindrical source No difference between point and cylindrical source

12. Energy distribution point source 12 600 – 662 keV 300 – 600 keV0 – 300 keV

13. Cosmic and beam trigger Beam trigger uses 40 cm x 60 cm TGC quadruplets and will be used during muon beam time and when muon halo is available Beam trigger uses 5 L of mixture of CO 2 and flammable n- Pentane (heated stainless steel pipes needed -> n-Pentane liquid at room temperature) Upgrade with larger chambers is foreseen to improve halo triggering and enable triggering of horizontal cosmics Cosmic trigger uses RPCs and will be used for vertical to ~ 45 degree cosmics when beam or halo are not available Gas mixture 95% C2H2F4. (tetrafluoroethane) and 5% C4H10 (isobutane) 13

14. Cosmic Trigger Layout 14

15. Cosmic triggger: top tracker Trigger and high time resolution. – 4 independent detectors area 1x0.5 m 2. Gap structure to be finalized – strips 3 cm wide; The 1 m long strips (16 per read-out panel) in all 4 RPCs 0.5 m long strips in 2 out of 4 chambers. # strips: 64 x 2 = 128 strips Fine tracking. – One or 2 RPC 30x30 cm 2 with 1 cm strips in both direction ( 32 strips vertically + 32 strips horizontally). Centroid reconstruction in both directions. # strips: 64 40 cm 100 cm 50 cm Y-Z readout Y only readout Y-Z readout Y only readout Fine trackers 30 cm View from bottom Slide: courtesy G. Aielli 15

16. Cosmic trigger: bottom tracker Trigger and high time resolution: – One chamber 1x0.5 m 2 as for the top tracker: strips: 16 + 32 = 48 – Fine tracking: 1 chamber 30x30 cm 2 as in the previous point. # strips: 64 Underground detector – One doublet chambers: size 2.8 x 2.4 (=2x1.2) m 2 (two chambers; bi-dimensional read out with 40 mm strips.. # strips: 224 (20 E/ channel) 50 cm 100 cm 30 cm Fine tracker Y-Z readout 280 cm 240 cm 30 cm Iron shielding Slide: courtesy G. Aielli 16

17. Beam trigger: test beam setup Monitor chambers For external reference Needed to select parallel tracks sTGC quadruplets within the Mechanical frame. Allows to Adjust the quadruplet position Slide: courtesy G. Mikenberg 17

18. Installing the CMS Muon Detectors at GIF++ The CMS Muon detection Technologies can be tested at the GIF++ starting from ~ Mid March 2015. Cs137 DTRPCCSCGE1/1 Beam Cosmic 18

19. TWiki Page https://twiki.cern.ch/twiki/bin/viewauth/CMS/MuonPhase2RadTesting 19

20. Plans Follow very closely the development of the GIF++. Next meeting is foreseen to take place in 22.05.2013 Studying the option to have the CMS Muons long term test in GIF++ The exact position of the CMS Detectors is under investigation. Investigate in Details the available DAQ architectures, SRS and VME based. Revising in details the available gas supply for the CMS detectors. 20

21. Thank you Information resources GIF++ Indico pagehttp://indico.cern.ch/categoryDisplay.py?categId=1942 GIF++ Web sitehttp://cern.ch/gifpp Gif++ EDMS pagehttps://edms.cern.ch/nav/P:CERN-0000077502:V0/P:CERN- 0000088840:V0/TAB3 21