LAV construction Status and overview A Antonelli 12

LAV construction: Status and overview A. Antonelli 12 Settembre 2011 Referee INFN

LAV construction status: a snapshot A 1 -A 5 at CERN, ready for installation, the sliding feet drawing has been finalized. The spare feet is going to be modified in LNF workshop and tested at CERN beginning of October. Vacuum test foreseen in November A 3 repairs carried out week of 22 -25 August, no major problem in the work. WARNING the ECN 3 crane problems should be fixed A 6 under construction at Frascati New, smaller banana design 240 ch = 60 bananas total 12 installed 12 ready to install 18 need cabling and test 18 to build (=72 blocks to process) LAV construction status – M. Moulson (Frascati) – Photon Veto WG – Mainz – 6 September 2011 2

Status of A 7, A 8, A 11 • A 7: Basic construction finished, will be delivered 10/10/2011 • A 8: First pass with lathe completed, will be delivered 10/11/2011 • A 11: cutting (done), beveling, will be delivered 10/12/2011 LAV construction status – M. Moulson (Frascati) – Photon Veto WG – Mainz – 6 September 2011 3

New drawings on EDMS A 1: Drawing as-built* A 6 -8: Final drawing for construction A 2 -5: Drawing as-built* A 9 -A 11: Preliminary WARNING: LAV-Straw interface should be fixed ASAP, I remind you that A 11 is under construction, A 9 -A 10 bid will be done in September. We need coordination among the engineers. LAV construction status – M. Moulson (Frascati) – Photon Veto WG – Mainz – 6 September 2011 4

2011 Final A 3 repairs went smoothly in August 5 stations essentially ready to install (A 1, A 2, A 3, A 4, A 5) Minor work on flanges for A 1, A 4 to be done before installation A 6 being assembled now First layer installed in before August shutdown On track for delivery of A 7 and A 8 by end of year A 9 -A 10 Bid in September A 8 -A 11 construction 2012 A 12 drawing Installation and commissioning of A 1 -A 11 (A 1 -A 5 will participate to the run) LAV construction status – M. Moulson (Frascati) – Photon Veto WG – Mainz – 6 September 2011 5

Status of the LAV FEE electronics M. Raggi LNF G. Corradi, C. Paglia, D. Tagnani LNF SELF PVWG WG Mainz 6/09/2011 6

9 U cards production • PCB for 5 boards already produced and mounted and tested • 100 To. T mezzanine already produced mounted and tested • Sum 4 analog signals, 50 pieces produced and mounted Few of them tested Assemble a first full 9 U FEE prototype before the end of October. 7

TELL 1 setup • A Tell 1 already @ LNF • A NA 62 -LAV VME crate already @ LNF • Plan to startup the system during October together with the LAV FEE • New Post Doc at LNF mainly dedicated to this 8

Future plans • Assemble a first full 9 U FEE prototype before the end of October. • Test the system extensively during fall • Validate the FEE before the end of 2011 • Start a first production before the end of 2011 9

A 2 Test beam: objectives 1. Validate final version of front-end electronics plus modifications of voltage divider: a) Time-over-threshold vs. charge calibration curves b) Efficiency vs. threshold for electrons, hadrons and muons 2. Measure time and energy resolution 3. Test new FEE with TELL 1 readout All that on a full, final ANTI ring, and thus also checking: - construction techniques - cabling and connectors - new DB 37 signal flanges - new ground feed-through on HV flange T 9 beam Electrons 0, 5 – 5 Ge. V selected using cherenkov Muon run 8 Ge. V

Total charge with To. T vs. QDC To. T(ns) Q(p. C) Very basic parametrization with 4 th order polynomial of charge vs. To. T curve considering all the hit blocks together

Energy resolution and linearity 2 beam Cerenkov counters (TDC & QDC): Operated at two different pressures to selectrons in a given momentum range:

Time resolution Electrons, first hit block. Time slewing fit and corrected Time resolution after time slewing correction Respect to the trigger time Diff. of 2 subsequent blocks

MC Digi for Large Angle Vetoes Detailed PMT simulation needed to assess efficiency @ low-energy Include and correctly treat: • Gain fluctuations • Optical g’s path fluctuations • Signal generation • Time over threshold FEE Signal (m. V) N photo electrons 8. 0 MC input parameters: • Gain at operation point 6. 4 G = 1. 1 × 106 • 1 st dynode collection eff. e 1 = 0. 85 4. 8 • Intra-dynode collection eff. ed = 0. 98 3. 2 • 1 st dynode time fluctuations d. T 1 = 0. 5 ns • Intra-dynode time fluctuations d. Td = 0. 8 ns 4 3 2 1. 6 Large Angle Veto WG meeting – Mainz – 6/9/2011 1 Time (ns) 2

Present data/MC agreement For MC use: 157 p. F PMT capacitance newly measured, take into account the 33 Ohm resistor at PMT out, 9. 5 m. V threshold, 2 m. V hysteresis Data/MC agreement: now much more satisfying need to measure threshold to improve MC Data Integrated charge (p. C) Time over threshold (ns) Large Angle Veto WG meeting – Mainz – 6/9/2011 13

Conclusions We are on schedule (some months delay) Need to keep the effort in construction for the next year, the ANTI now are bigger 240 blocks 2012 will be crucial. . Many things in parallel construction, installation and commissioning, run. In parallel FEE production and test should go on and the integration with the tell 62 should proceed, all this with limited number of person Large Angle Veto WG meeting – Mainz – 6/9/2011 13

Richieste LNF INTERNO Riunioni di collaborazione, contatti con ditte per la meccanica e il FEE dei LAV, controlli di qualita' e misure (campo magnetico e vuoto) presso la ditte costruttrici Vessel, taglio laser del Tykec a INFN-GE= 9 mu 18. 00 ESTERO . Riunioni tecniche progettisti con responsabilita' sulla meccanica, installazione ed elettronica= 2 mu 8. 00 . run prova TDAQ, DRY run 2 mu 16. 00 3. installazione meccanica e test da vuoto 5 LAV al CERN, Installazione e test elettronica di 9 LAV=10 mu 40. 00 Riunioni di collaborazione e conferenze, responsabilita' Veti, 6. 5 mu 26. 00 Run 4 mu (8 settimane per due persone) 16. 00 CONSUMO Metabolismo, materiale magazzino e pool elettronica LNF e CERN per la costruzione, il cablaggio, il test elettrico e da vuoto di 4 LAV (diemetro >= 3 m) , materiale vario da ditte per piccoli tools di costruzione, estensione materassino ammortizzante, coibentazione per temperatura 40. 00 TRASPORTI Trasporto di 4 LAV al cern (4 trasporti saranno eccezionali diametro maggiore di 3 metri). 20. 00 APPARATI Completamento elettronica di front end e del sistema di calibrazione, meccanica di A 12 100. 00 Totale NA 62 Lab. Naz. di Frascati 284. 00 Large Angle Veto WG meeting – Mainz – 6/9/2011 13