1. FTOF Status Anton A. Izotov, Frascati 8-12.09.14

2. A.A.Izotov, PNPI, Frascati 08-12.09.14 2 FTOF TDR TABLE OF CONTENT 1. EXECUTIVE SUMMARY 2. PHYSICS CASE OF FTOF 2.1 FORWARD SPECTROMETER TOF PID 2.2 FTOF WALL COUNT RATES, BACKGROUND 2.3 HADRON DETECTION WITH FTOF WALL 2.4 STRANGE HYPERONS DETECTION 2.5 Λ C DETECTION 2.6 INTERPLAY OF FTOF WALL AND BARELL TOF 2.7 DIPOLE TOF 3.TECHNICAL DESIGN CONSIDERATIONS OF FTOF 3.1 PLASTIC SCINTILLATORS AND PHOTO DETECTORS 3.2LIGHT PROPAGATION IN SCINTILLATION SLABS 3.3 DIGITIZATION OF SCINTILLATION COUNTER RESPONSE 4.PROTOTYPING 4.1 TEST STATION 4.2 PROTPTYPING USING PROTON BEAMS, 4.3 FTOF PERFORMANCE SUMMARY 5. MECHANICS, CABLING AND INTEGRATION 6. CALIBRATION AND MONITORING 9. PROJECT MANAGEMENT ( SCHEDULE, RISK ASSESMENT, CONTRACT, ETC.) Color code: green -> well in progress Blue -> planning to start up soon Red -> not clear yet

3. A.A.Izotov, PNPI, Frascati 08-12.09.14 3 FTOF wall positioned at 7.5 m from the IP Central part 20 counters 20 plastic scintillators Bicron 408 140x5x2.5 cm 40 Hamamatsu R4998 (1”) ` Side parts 2x23 counters 46 plastic scintillators Bicron 408 140x10x2.5 cm 92 Hamamatsu R2083 (2”)

4. A.A.Izotov, PNPI, Frascati 08-12.09.14 4 Detection efficiency and count rates of charged hadrons Count rates scaled to 10 7 interactions in target Generated by DPM (80K events) Detected by BTOF (eff / N per sec) Detected by DTOF (eff / N per sec) Detected by FTOF (eff / N per sec) π -π - 906930.36 / 4.08 · 10 6 0.01 / 0.14 · 10 6 0.23 / 2.59 · 10 6 π +π + 907250.44 / 5.03 · 10 6 0.002 / 0.03 · 10 6 0.18 / 2.07 · 10 6 K - 30220.09 / 0.03 · 10 6 0.001 / 0.0004 · 10 6 0.26 / 0.1 · 10 6 K + 30820.25 / 0.09 · 10 6 0.003 / 0.001 · 10 6 0.12 / 0.046 · 10 6 p-bar420950.007/ 0.04 · 10 6 0.0002 / 0.001 · 10 6 0.62 / 3.24 · 10 6 p420030.61 / 3.19 · 10 6 0.002 / 0.012 · 10 6 0.07 / 0.35 · 10 6

5. Lambda MC A.A.Izotov, PNPI, Frascati 08-12.09.14 5

6. Coincidences A.A.Izotov, PNPI, Frascati 08-12.09.14 6

7. Background A.A.Izotov, PNPI, Frascati 08-12.09.14 7 All charged hadrons e+e- all e+e- from EMC e+e- from  0 →  

8. Prototype MC A.A.Izotov, PNPI, Frascati 08-12.09.14 8 BC408 2.5x10x140 cm 3 200, 500, 1000,1500,2000 MeV X = 0, 25, 50 cm Y = 0, 2, 4 cm

9. Test Station A.A.Izotov, PNPI, Frascati 08-12.09.14 9 R4998 1” R20832” R97791” R98002” Electron FEU187 1” SiPM S10931-50p 3x3 mm 2

10. A.A.Izotov, PNPI, Frascati 08-12.09.14 10 On beam setup at PNPI Protons 730 and 920 MeV

11. A.A.Izotov, PNPI, Frascati 08-12.09.14 11 Offline analysis 1. Coincidence of 8 planes of 4 PC 2. Coincidence of 4 TDC channels 3. Coincidence of 4 QDC channels

12. A.A.Izotov, PNPI, Frascati 08-12.09.14 12 Prototyping @ COSY. Beam: protons E=2GeV, d=3cm, Collimator 0.2х3 cm, Counter: B408, 140х5х1.5 cm 3, R4998Х2, Two counters: B408, 1x1x1 cm 3, PMT-187, TRB2 24 ps/ch Marek Palka, Jagellonian University, Krakow, “The research leading to these results has received funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement # 283286.” σ PMT-187 ≤ 70 ps σ slab > 150 ps

13. A.A.Izotov, PNPI, Frascati 08-12.09.14 13 On beam results Thickness x width x length, cm Photomultiplier 1.5 x 5 x 140Hamamatsu PMT R4998 (both ends) 1.5 x 10 x 140Hamamatsu PMT R2083 (both ends) 2.5 x 2.5 x 140Hamamatsu PMT R4998 (both ends) 2.5 x.5 x 140Hamamatsu PMT R4998 (both ends) 2.5 x 10 x 140Hamamatsu PMT R2083 (both ends) 2.5 x 2.5 x 140Electron PMT 187 (both ends) 2.5 x 5 x 140Electron PMT 187 and Hamamatsu R4998 2.5 x 5 x 140Electron PMT 187 (both ends) 2.5 x 10 x 100Electron PMT 187 (both ends) 2.5 x 10 x 100Electron PMT 187 and Hamamatsu R4998 Intensity tests R4998 (May 2014) Inclusive count rate, kHz 500100014001500 σ (weighted mean), ps 67767576 Y-scan

14. A.A.Izotov, PNPI, Frascati 08-12.09.14 14 PMT R4998 & SiPM S10931-50p at the Test Stand. Run σ0σ0 σ1σ1 σ2σ2 40366326168149 40367497170142 40368486176147 σ worse than 160 пs R4998 Run σ0σ0 σ1σ1 σ2σ2 40366608195157 40367543199151 40368557193150 S10931-50p B408 – 3x3x40 mm 3 TDC – 25 ps/chan PA - ~8 times Source - 90 Sr SiPM NxN matrixes!

15. A.A.Izotov, PNPI, Frascati 08-12.09.14 15 The absolute beam intensity was determined in a standard way by measuring induced radioactivity of irradiated aluminum foils. The beam intensity during the tests was varied in the range 1.3 - 2.1x10 8 cm -2 s -1. The SiPM sample was not powered! Radiation was exposed in 10 successive periods about 10 minutes each. The integrated number of protons passing through the sensitive surface of the SiPM sample with the cross-section of 3x3 mm 2 was 0.9*10 11. By our estimations, such dose corresponds approximately to irradiation to be collected by a similar SiPM installed on a central scintillation bar of the Forward wall during 10 years of continuous beam producing hadrons off the PANDA target. SiPM parameters (dark noise, amplitude and time characteristics for different values of high voltage) were measured before and after the radiation test using test station with 90 Sr electron source. SiPM Radiation Hardness Test @ 1GeV PNPI Proton Beam. U,VI, µAA, mVNoiseNoise+ 90 Sr 72.060.154015508700 72.530.3080423018500 72.0681.0428006200 72.53113.0699000102000 As it is seen from the table the SiPM was practically killed by this dose the value of which can be taken as upper limit, Yet it is important to find out at which dose the sample start malfunctioning, It is also important to compare irradiation effect on unpowered and powered samples, All this will constitute our nearest experimental program with SiPM samples. ΔT = 0.056 C o this is not heat!

16. Conclusions and to do Physics case of FTOF, Light propagation MC, Test station, On beam tests, TDR is coming. A.A.Izotov, PNPI, Frascati 08-12.09.14 16 λ c Detection, Complete counters digitization, Test station & on beam tests with TRB! Mechanics, cabling and integration, Calibration and monitoring, Project management (schedule, risk assessment, contract, etc.)