PID session summary M Bonesini Sezione INFN Milano

PID session summary M. Bonesini Sezione INFN Milano Bicocca M. Bonesini - CM 22 RAL October 08 1

PID meeting schedule (from Vittorio) M. Bonesini - CM 22 RAL October 08 2

Tof I Cage Tof II EMR (? ) M. Bonesini - CM 22 RAL October 08 3

TOF 0 status problems with H 6533 assemblies (mainly 15% of broken divider during tests !!!) best H 6533 assemblies used for TOF 0 installed at end June 08 and in DAQ since July 08 e+ beam data used to test detector performances (thanks Yordan ) M. Bonesini - CM 22 RAL October 08 4

TOF 0 assembly in Milano M. Bonesini - CM 22 RAL October 08 5

Preliminary installation before Q 7 (July 08) Installation in final position inside DSA M. Bonesini - CM 22 RAL October 08 6

During data taking: one broken PMT (channel # 28, it was one of 3 discharging ones as discovered from preliminary tests at RAL after transport in June) M. Bonesini - CM 22 RAL October 08 7

The same time difference but in run 684. Probably the beam is a mixture of pions and positrons. P = 300 Me. V/c

The TOF results from Frascati BTF. P = 250 Me. V/c (from Yordan) Time-walk effect can be suppressed by imposing a constrain in the difference of obtained time resolutions of the ADC pulse height in the bars. In the bars in the analysed run. plot : No constrain (up) , delta ADC < 25% (middle) and delta ADC <10% (down).

TOF 1/2 status all TOF 1 detector items ready. H 6533 assemblies under test (28 needed). 6 refurbished assemblies with extended kapton insulation delivered on Thursday 16/10/08 by Hamamatsu (under test) TOF 1 delivery foreseen for this year TOF 2 lightguides production finished, counter assembly started TOF 2 delivery date expected beginning 2009 M. Bonesini - CM 22 RAL October 08 10

Baseline local shielding for TOF 2 • baseline shielding 6. 6 cm thick ARMCO iron bar, with equidistant holes (32. 5 mm diameter) to accommodate H 6533 assemblies M. Bonesini - CM 22 RAL October 08 11

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Needs to be sure about Virostek plate details … M. Bonesini - CM 22 08 RAL October 16

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EMR project preliminary R&D going on good design in hands, but needs approval + funding from INFN (NTA November ? ) + clarify full costing (nothing left in the corner ? ) M. Bonesini - CM 22 RAL October 08 20

The bars will be made with the Minerva die set which gives a triangle with a base of 33 mm and height of 17 mm nominal. Alan Bross Each layer 59 triangular bars: 30 triangular bars x 33 mm =990 mm + 29 matching triangular bars Half triangular edge mechanical elements Each layer Active Scintillator region : 990 mm x 17 mm Thickness ~17 mm Total=17 mm x 40 layers = 680 mm M. Bonesini - CM 22 RAL October 08 21

M. Bonesini - CM 22 RAL October 08 22

General layout of the EMR electronics. 1 -The frontend electronics Organized in piggy back boards (overall called FEB, Front-End-Board): • FEB-ASIC (located inside the detector box) - It will host the PMT (through a dedicated socket), the two frontend ASICs (VA 64 TAP 3 and LS 64 2) and the Altera CYCLONE III for the ASICs digital output handling. - The FEB-ASIC will be connected directly to the digital configuration board in the VME crate, to the FEB-MEM and to the FEB-ADC • FEB-ADC used for the acquisition of the analog information from every bar. This last block is used to test that all the ASICs are correctly working. • FEB-CAL is the frontend block responsible of the calibration: the side of every bar not Bonesini -with CM 22 RAL October • FEB-MEM hosting the memory to store interfaced with the PMT will be M. equipped 08 23 an LED for calibration and test purposes. the data collected during the spill

M. Bonesini - CM 22 RAL October 08 24

Conclusions TOF 0, KL, CKOVa/b on floor and taking data TOF 1 will soon arrive, followed by TOF 2 (PMTs problem still hanging around): a bottle of champagne has been bet with Mike about who will arrive first between solenoid and TOF 2 EMR project in good shape but … needs approval+funding clarification M. Bonesini - CM 22 RAL October 08 25