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1 M. Bonesini - CM 25 RAL 5/11/09 PID status report M. Bonesini Sezione INFN Milano Bicocca.

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Presentation on theme: "1 M. Bonesini - CM 25 RAL 5/11/09 PID status report M. Bonesini Sezione INFN Milano Bicocca."— Presentation transcript:

1 1 M. Bonesini - CM 25 RAL 5/11/09 PID status report M. Bonesini Sezione INFN Milano Bicocca

2 M. Bonesini - CM 25 RAL 5/11/09 2

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4 The resolution in a given pixel can be measured before the absolute time calibration (see the plot) The expected total resolution of the detector can be calculated by the formula, where σ i is the resolution in pixel I N i is the number of events in pixel i and N tot is the total number of event.

5 Measured total resolution – 52.3ps

6 Positron peak in the TOF spectrum is used to calibrate TOF1 Expected resolution – 64.2ps Measured resolution – 68.1 ps Absolute time calibration in TOF1 is not so precise.

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8 Mark Rayner – Detector Session 8 TOFs make important physics measurements beyond PID TRP Q7Q8Q9Diffuser x, y, z p x, p y, p z I7I7 I8I8 I9I9 IDID D2 RFAbsorber t 1 x 1, y 1 t ? t ? ? Stages II - VI  x,  y , , ,  t 0 x 0, y 0 note suppressed zero True Pt (MeV/c) 20 100 Pz Resolution (MeV/c) 7 0

9 Mark Rayner – Detector Session 9 Conclusion ‏Stage I  Difficult to predict emittance  Scraping: difficult to design optics  Emittance-momentum matrix? ‏Stages II – VI  RF phase of individual muons?  Longitudinal emittance?  Longitudinal-transverse coupling?  Amplitude-Pz correlation? ‏TOF capabilities  Individually calculated and independent measurements of all phase space variables  Essential for timing  Important momentum measurement upstream of thick diffuser plates, particularly at low amplitudes ADC Digits TDC Slab hits Space points Tracks Calibration, Complete detector measurements PID, Phase space distributions at all z

10 TOF and KL FEE in different VME Crates Each crate receives separate DAQ trigger at the end of the spill Perfect Synchronization needed for correlation between TOF and KL Jean-Sebastien Graulich Synchronization can be lost because of Unstable electronics in DAQ trigger distribution Unstable behavior of the VME/Pci Interface The DAQ software release the busy and enables the DAQ trigger receiver channel after readout Must go through the VME/Pci Interface It happens that one of the two commands is not executed properly… Unpredictable Cured only by a power cycle Has to be monitored

11 M. Bonesini - CM 25 RAL 5/11/09 11

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17 M. Bonesini - CM 25 RAL 5/11/09 17 1.TOF2 counters assembled in MIB 2. last faulty H6533MOD assemblies under repair at Hamamatsu have been delivered around 20 October. 3. All PMTs have been tested after some days of burning up 4. final platform for KL+TOF2+SW from Rm3 ready 5. TOF2 mechanics + local shielding ready 6. Final assemby of TOF2 will start soon (some problems due to the weight of the detector ~200 kg with shieldings) 7.Expected transport at RAL 23/11 8.Installation/cabling foreseen for 24/11 – 28/11

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19 M. Bonesini - CM 25 RAL 5/11/09 19 Local shielding (in addition to Virostek plate) Joints to close magnetic circuit

20 M. Bonesini - CM 25 RAL 5/11/09 20

21 M. Bonesini - CM 25 RAL 5/11/09 21

22 Tests on single PMTs Dark current/spikes tests for some days Pre-calibration with YAP-CE source Tests on single counters (after assembly) Tests for light tightness Tests with laser light injection (changing HV) Tests with cosmics (changing HV) 22 M. Bonesini - CM 25 RAL 5/11/09

23 signal cables: 20 old RG213 cables 40 m long (~169.6 ns delay) + in addition other 20 RG213 cables (30 m long) from NOVACAVI Milano giving the same delay ready 1. All individually measured for delay HV cables: 40 new 31 m long cables to allow all STEPS done in MIB instead of 2m long cables ready no length problem 23 M. Bonesini - CM 25 RAL 5/11/09

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25 M. Bonesini - CM 25 RAL 5/11/09 25

26 26 EMR design & Module M0 prototype KL Movable platform (existing part to be delivered soon?) EMR EMR features: - 25 modules - 1 module is made of X&Y planes - 2950 triangular bars - nearly 11 km of WLS fibers (1.2mm diam.) - 50 multianode PMT - 50 single pixel PMT - 28 Kg per plane (1,5 Ton totally)

27 27 EMR design & Module M0 prototype FEE & Multianode PMT Single pixel PMT Fiber enclosure Supporting frame (interface)…still under investigation Outer Box 4mm gap between Electronics boxes

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33 33 EMR Integration issues @ RAL Patch panel location Crane access with the slings!! Interfere / upper platform Upper platform 80 cm Jack screws for vertical tuning FEA’s will be performed on EMR to validate the design

34 34 EMR Integration issues @ RAL KL EMR first modules

35 P Soler, MICE CM25, 5 November 2009 o Luminosity monitor to determine particle rate close to target and extract protons on target as function of depth – independent of beam loss monitors. o Luminosity monitor will record the number of particles crossing 4 scintillators for every spill – can build up high statistics to validate particle production in target. o By having a small plastic filter we can also reduce low energy protons – some sensitivity to proton energy. o Can be used to compare particle rates close to target (luminosity monitor measures mainly protons and pions) with other counters along beamline (GVA1, TOF0, CKOV, TOF1 and FBPM counters which measure pions, muons, electrons) – validate beamline simulations o For this reason, the luminosity monitor will be very useful for beam commissioning

36 P Soler, MICE CM25, 5 November 2009 o Final design of luminosity monitor: o Rate: for beam loss monitors running 50 times higher level (ie. beam loss ~2.5 V) would mean around 2000 particles/cm 2 in final 2 ms of spill (ie ~4 MHz proton rate in 4 cm 2 ) Cuts off: protons ~500 MeV/c pions ~150 MeV/c Beam

37 P Soler, MICE CM25, 5 November 2009 o PMTs: Hamamatsu H5783P — 0.8 ns rise time — ~1x10 6 gain — Only need to provide 15V to power PMT oCost: £632/PMT. Had two already, only needed to buy two extra (~£1300) oReadout: use NIM coincidence units and count three channels using VME scalers already in DAQ 50 mm High rate capability with 10 ns coincidence gate If rate still an issue, can make more shielding

38 TOF0,TOF1,KL, CKOV work horses working well Soon delivery of TOF2 + final downstream platform EMR expected for mid 2010 Luminosity monitors soon available A lot of activities around; PID is in good shape 38 M. Bonesini - CM 25 RAL 5/11/09

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