Introduction LOI Hardware activities and GBT Simulations 2010 beam conditions and upgrade DC-DC converters Radiation tests Calorimeter Upgrade Meeting Frédéric Machefert Friday December 10th, 2010

LOI and FPGA in radiation environment The LOI can be downloaded from https://twiki.cern.ch/twiki/pub/LHCb/LHCbUpgrade/LOI.pdf TT, Tracking, simulation and Physics are missing TT and tracking preliminary versions can be reached from https://twiki.cern.ch/twiki/bin/view/LHCb/LHCbUpgrade FPGA in radiation environment HEP/CERN working group on the use of FPGA's in radiation environments Group initiated by Jorgen Christiansen If you are interested please contact Ken Wyllie Next year → proposed agenda (follows electronics upgrade meeting) 11th February 15th April 10th June 12nd August 14th October 9th December

Hardware activities in 2011 and GBT The future digital prototypes are linked to the GBT progress The proposal is to include the GBT acquisition on the next digital prototype When will it be available ? GBT is at the development level. According to Ken GBT will probably not be ready for users in 2011 It is possible to implement an acquisition with ALTERA This would require an effort on a design which would be far from the final one The idea of GBT mezzanine is advancing Difficult for data acquisition to make it fit with constraints of different sub-detectors May be a good idea for ECS (upstream fibre) The full functionality readout of the optical links would not be ready before 2012 (Jean-Pierre Cachemiche) May hope in 2011 a “small” set-up to provide to the users (see next slide) : capture data on few GBT links, read them on a NIOS TCP/IP server through a 1 GbE link on a PC, send ECS commands and receive status through a GbE path to a GBT link, Distribute a synchronous 40 MHz clock on few GBT links eventually send few TFC-like commands

Mini-Readout setup (Jean-Pierre) But the price of such a mini-setup in 2011 would be close to 10k€ (!) Hence suppose no new digital prototype before 2012 Depending on the progress, may imagine start design (drawing) by the end of 2011

Simulations for the upgrade A first set of data has been produced (Gauss) Luminosity : 2x1033 cm-2s-1 New samples may be produced at lower luminosity in the future This sample should help people get experience with the upgrade conditions LHC structure is NOT implemented in the simulation software This is not planned in the near future Major modification Should be agreed during a dedicated meeting Impact on pile-up, spill-over, subtraction, packing studies, … But it should be possible to emulate the structure into Boole (user private code) Gauss output are kept in order to permit users to run Boole New simulation includes modification of the VELO → pixel detector Calorimeter includes SPD/PS Should not be difficult to remove them from the simulation (break trigger if still in ?) Linked to the decision on the PS/SPD Most of the sub-detectors started to work on the simulations for the upgrade We should find people in the calorimeter group to work on simulations ! Next upgrade simulation meeting in January

2010 beam conditions and the upgrade Upgrade goal Increase by a factor 5 the statistics Keep muon trigger efficiency and improve (2x) hadron efficiency 40MHz software trigger Detector efficiency overall maintained with respect to nominal Because of small number of packets we worked in 2010 mostly at a m (number of interactions per crossing) close to what should be experienced during the upgrade Nominal should be m<1 (0.4) Often ran at m>2 Ghosts appear in the tracking Partially solved by cutting on GEC SPD multiplicity But cut also interesting events ! Cannot pay such a price for the upgrade Mostly involves the tracking of LHCb But we can use the present data to get a flavour of the upgrade conditions

DC-DC converter A DC-DC convertor is being designed for the upgrade This would replace the present regulators This may be dangerous for the analog electronics Federico Fassio is “quite positive about usage in analog electronics” (Ken) Still we need to check ! Idea : solder a DC-DC converter on a digital prototype → to be looked at Specifications: input voltage: 5 to 12V output voltage: down to 1V but keep in mind this affects efficiency output current: up to 3A efficiency around 80% for conversion 10 to 2.5V (different in other conditions) footprint of the full DCDC plug-in board (excluding the area dedicated to the connectors, which can be customized to a large extend): about 13x16mm and 10mm height. These can still change by 1-2mm in each direction. Experts recommend it to be cooled There have been quite a lot of measurements on noise immunity etc. You can find various presentations at the link on the LHCb electronics upgrade page to the power working group: http://indico.cern.ch/conferenceDisplay.py?confId=85278

Radiation tests of FPGA Syracuse performed an irradiation of the Actel A3PE 1500 FPGA Beam of protons @ 226MeV Test was very ambitious But could not exploit it because of problems during the test FPGA died after 90krad No problem for us Probably a latch-up The behaviour of the chip is not understood (timing issues, etc...) Syracuse is discussing with Actel The plan is to have another irradiation with the same component (Feb/March 2011) Comment from Syracuse : This FPGA seems to have a number of drawbacks, including timing and operational issues (and perhaps even VHDL implementation) Idea of having common irradiation tests with CMS at CERN facilities neutrons and gammas Failure

Conclusion Electronics milestones Analog Characterisation of the Analog part Discrete solution ASIC Digital Implement Acquisition (January) Implement packing Test the A3PE chip Timings, Flipping bits, … Current question We need to be convinced of the (un)usefulness of the SPD/PS Work to be done (and not covered) See above → SPD/PS Simulations of the calorimeter for the upgrade