1. BMBF-JINR PANDA Meeting, Dubna, November 15, 2013 G.Alexeev (for muon group) Status of Project and Related Topics * Report to the Muon Review Panel ( CERN, May 2013 ) * Reaction of the Review Panel ( Eugenio NAPPI/INFN - chair, Joachim BAECHLER/CERN/TOTEM, Ludovico PONTECORVO/CERN/ATLAS - June 2013 ) * Answers to the Panel’s QUIZ ( 2013 -> 2014 ) * Plans for 2013-14: - Finish answering the QUIZ (May-June 2014) - Range System and Full Size Prototypes - Possible/desirable modifications to T9 beam line

2. Panel’s Reaction

5. Panel’s QUIZ (as structured and rated by Muon Group) * Effects of MDT structure with ‘open geometry’ (plastic in the sensitive volume) on: - Aging, - Rate effects (charging up), - Electrostatics (Garfield simulation) * Grounding/screening schemes * Gas flow * Mounting/assembly * Miscellaneous issues…

6. Assembly of RSP (CERN, 2012) Mounting of one fully assembled detector layer package (12 MDTs, strip board, shielding, FEE); plane # 3 Plane#3 ADB-32 cards for strip R/O

7. Correlation of fired wires & strips for plane # 3 (CERN, 2012) (peak corresponds to beam position) Strip eff. = 83-92 % depending on events selection criteria

8. Detector plane (1x1 m) prepared for shielding MDTs HV/S-8 cards (combined in HV bus) Al foil A-32 cards Strip board

9. Testing of shielding variants 1.Repeated previous variant of aluminized mylar shielding (CERN 2012) but with thick Al foil (see photo) -> sensitive to hand touch, not stable grounding of preamplifier outputs (seldom self extinctions possible) => designed a complex “box” shielding of the preamplifier plane edge. 2.Tried shielding with open MDT end-plug sides (free access to gas connections and HV/S-8 cards)=> shielding of these sides is not necessary. 3.Tested several variants of shielding GND connections (common GND and separated GND for MDTs and strips) => chose the best variant (common grounding with HV/S-8 cover as common ground bus )

10. Final variant of detector plane shielding Preamplifier shielding box ADB-32 cards HV/S-8 cover (GND bus) Shielding free edges All results of shielding tests were applied to this final detector plane version Preamplifier shielding box consists of several Al plates which provide: -shielding of A-32 cards (from detector and each other), -shielding of input strip-to-preamp-wires -preamplifier GND connections Fully equipped detector plane was tested for a month – no performance changes were observed

11. Typical strip signals from cosmic (final variant of shielding) MDT HV = 2,3 kV Amplification ~ 400 mV/µA Low noise amplitude level ~ 80 mV ( 0,2µA @input )

12. Cosmic “test beam” R/O (21 strip & 16 wire channels) Scintillation counters (10cm x10 cm) strip’s ADB-32 cards LT card DAQ stand

13. MDT characteristics MDT counting characteristic on cosmic Discrimination curve for strips on cosmic Strip efficiency on cosmic Ar:CO2= 70:30 HV = 2.35 kV Wires - for reference Strips

14. “Beam” profiles for wires & strips on cosmic (coincidence of 2 scintillators 10 cm x 10 cm) Wire number Probability per event (%)

15. Hit multiplicity distributions (wires & strips) HV = 2.35 kV, strip threshold = 1.8 V = 1.5 = 2.5

16. SolidWorks 2011 (solvers : COSMOSM 256, Flow Simulation) IN OUT MDT – 1m Gas - Argon Δp = 10e02 mm H 2 O ΔV/V = 1/day Gas - Argon Δp = 10e02 mm H 2 O ΔV/V = 1/day

17. Flow @ 1 m MDT OUT IN Channel # 1-8: 9.0e-06, 9.8e-06, 9.5e-06, 8.4e-06, 8.3e=06, 9.2e-06, 8.8e-06, 8.4e-06. # 9.2e-06, 9.7e-06, 9.5e-06, 8.4e-06, 8.7e=06, 9.1e-06, 9.0e-06, 8.0e-06. # 9.0e-06, 8.3e-06, 8.6e-06, 9.0e-06, 9.0e=06, 8.5e-06, 8.7e-06, 8.7e-06. # 8.4e-06, 8.7e-06, 8.4e-06, 8.9e-06, 8.7e=06, 8.5e-06, 8.6e-06, 9.0e-06. IN OUT PANDA

18. Flow @ 4 m MDT Channel # 1-8: 8.9e-06, 7.5e-06, 7.5e-06, 8.2e-06, 8.1e=06, 7.2e-06, 7.3e-06, 8.1e-06. # 9.7e-06, 7.8e-06, 7.8e-06, 9.1e-06, 9.4e=06, 7.5e-06, 7.5e-06, 9.0e-06. # 8.9e-06, 7.6e-06, 7.6e-06, 9.0e-06, 9.4e=06, 7.5e-06, 7.7e-06, 9.3e-06. # 9.7e-06, 7.6e-06, 7.7e-06, 9.2e-06, 9.6e=06, 7.6e-06, 7.7e-06, 9.2e-06. OUT IN OUT

19. ` CPU MUX (master) GeSiCA MWDB ( RJ-45) port 1÷8 port 1÷8 port 1÷8 8 8 8 RW (RJ-45) 2 1 1 1 port 1÷8 Ethernet PC HD IN/OUT REG. TRIGGER VME 6U T0=1ch. BOS EOS Stand-alone DAQ Block-diagram may be used independently of COMPASS/CERN network GeSiCA

20. DAQ units for beam test (purchased in 2013) 1). VME crate x 3 units (invoice in processing): VME64 crate; 8U; 21 slots; with fan; up to 3kW; +5V 115A/230A; +/-12V 46A; auto-range AC. 2). 6U VME Single Board Computer VP 917/012-16 x 2 units (invoice in processing): 2-core 2.5 GHz i7-3555LE; 16 GB DRAM; 2 PMC/XMC slots; Ethernet port; 2.5″HDD SATA-III 500GB; Splitter cable for VGA/Keyboard/Mouse/COM-Port/USB. 3). 6U VME Single Board I/O Register V977 x 2 units (invoice in processing): 16 channels; NIM or TTL Input/Output signals. 4). 6U VME GeSiCA x 5 units + MUX x 2 units (Control and Acquisition module) readout-driver (offer in processing): 8 front-end serial interfaces (RJ-45); 512 MB internal FIFO memory, S-LINK output interface.

21. Test stand for X-ray scanner upgrade Actuator CAMAK interface for stepping motor Stepping motor

22. Plans for 2013-14: * Finish answering the QUIZ (May-June 2014) * Range System Prototype: - Tests of different screening/grounding schemes for strip R/O - Full equipment of RSP up to 4286 total channels (+24 analog R/O) - Tests of RSP performance on cosmic with different configurations of R/O - Mounting of RSP back at T9 beam line * Full Size Prototype: - Apply results of RSP screening/grounding schemes for FSP - Prepare FSP for running at COMPASS beam halo since 2014 * Possible/desirable modifications to T9 beam line: - Upgrade of beam diagnostics equipment (time-of-flight, Cerenkov counters) - Magnetic analysis of muon momenta to +/- 1% (magnet exists at PS/CERN)

23. Backup slides

24. SolidWorks 2011 (solvers : COSMOSM 256, FlowSimulation) MDT – 1m IN OUT Gas - Argon Δp = 10e02 mm H 2 O ΔV/V = 1/day Gas - Argon Δp = 10e02 mm H 2 O ΔV/V = 1/day