Status of the FMD LHCC referees meeting 10
- Slides: 12
Status of the FMD LHCC referees meeting, 10 October 2005 Børge Svane Nielsen Niels Bohr Institute LHCC referees meeting, 10 October 2005 Børge Svane Nielsen, NBI 1
Prototype status Hamamatsu sensor prototype: well within specs → Inner production started, delivery end November → Outer design done, prototype ordered IDEAS inner hybrid prototype: VA 1_3 chips within specs, all produced → 2 nd hybrid prototype delivered and tested → Hybrid production starting Prototype module (sandwich) status: MIP particles seen (680 Me. V e-) Noise level as expected or better → 2 nd prototype tested in e- beam early October Readout electronics status: → Prototype VA 1 -Digitizer-RCU chain working Mechanics: → TPC-ITS-T 0 -V 0 -FMD assembly test done LHCC referees meeting, 10 October 2005 Børge Svane Nielsen, NBI 2
Silicon sensors Inner prototype: 300 μm thick 2 x 512 strips Bonding pads 250 μm pitch Leakage current (specs < 3 μA) 300 n. A Bias voltage 300 V Detector capacitance 13 cm 2 n. F Bonding pads LHCC referees meeting, 10 October 2005 Bias voltage Børge Svane Nielsen, NBI 300 V 3
Prototype module § 3 prototype inner detector sandwich modules built: Hybrids glued to sensors with thin ceramic spacers Readout pads bonded to silicon at periphery of hybrid bonds hybrid sensor LHCC referees meeting, 10 October 2005 Børge Svane Nielsen, NBI 4
LHCC referees meeting, 10 October 2005 Børge Svane Nielsen, NBI 5
Beam test of modules 680 Me. V e- beam test at ASTRID ring at Aarhus University, DK FMD module e- beam LHCC referees meeting, 10 October 2005 Børge Svane Nielsen, NBI 6
Noise estimate Inner sensor noise estimate Noise Source Short strips Long Strips (14 mm) (50 mm) Elect. + cap. 263 e- 309 e- Bias 208 e- 47 e- 88 e- 338 e- 390 e- 22000 e- Ileak Total Signal (1 MIP) Signal/Noise 65 56 LHCC referees meeting, 10 October 2005 Børge Svane Nielsen, NBI 7
Test beam results, July § Tested prototype with high energy electron beam (680 Me. V) § Clear signal peak § Signal/Noise 60 LHCC referees meeting, 10 October 2005 Børge Svane Nielsen, NBI 8
Test beam results, October S/N=56 S/N=47 S/N=58 S/N=56 LHCC referees meeting, 10 October 2005 Børge Svane Nielsen, NBI 9
Read-out electronics Lab test with sandwich and prototype Digitizer+RCU readout RCU Good progress with prototype Digitizer and USB version of RCU - prototype Digitizer card + firmware built - complete Digitizer+RCU chain works - first beam tests with full electronics chain successfull - preparing for final version LHCC referees meeting, 10 October 2005 Digitizer Børge Svane Nielsen, NBI 10
Integration test Installation of FMD 3 and FMD 2 together with ITS, etc. Beam pipe support LHCC referees meeting, 10 October 2005 Børge Svane Nielsen, NBI 11
Conclusions § FMD prototype modules show excellent signal to noise characteristics ( 60: 1). § Hit sharing accounts for most of the particles seen between the MIP peak and the noise peak. § Production of inner sensors and hybrids started. § Final design of outer module, digitizer and mechanics progressing well. LHCC referees meeting, 10 October 2005 Børge Svane Nielsen, NBI 12
