Calorimeter Upgrade Meeting - News

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Presentation transcript:

Calorimeter Upgrade Meeting - News F. Machefert LAL, Orsay Frédéric Machefert – Calo Upgrade Meeting

Electronics tests Carlos came to LAL in November A few issues solved on the digital board (→ Olivier's presentation) Oscillations on the analog part (→ Carlos' presentation) Joined test in Barcelona (ASIC tests + digital electronics)  January / February ? What do we need ? Digital electronics setup (firmware → Olivier's presentation) Software : what kind of measurement ? Linearity, noise, crosstalk, spill over, ... Organization of irradiation tests of a digital board with the analog mezzanine 2 effects : Dose, SEE Beam availability will be a problem Protons (Dose – SEE) : PSI, CERN (?), CPO(Orsay) Heavy ions (SEE - Dose) : GANIL (?) Firmware has to be adapted : USB → SPECS (maybe not necessary) Mitigation of the firmware (RAM pointers, configuration registers → TVR) What version of the ASIC can be used for this (mitigation) ? December 16th, 2011 Frédéric Machefert – Calorimeter Upgrade Meeting

Electronics tests We have to prepare tests of the electronics in beam with modules/PMT/particles Linearity, spill over, noise, ... in « real » conditions 2 solutions to be looked at Can we use the same setup as the one we had for the present electronics ? Availability of the beams is an issue TDC to be used and Lecroy integration availability Probably some firmware adpatations required Could we install an acquisition setup in the cavern and use real events Can we send the signal of a few modules to both electronics Choose corners and need a shutdown to prepare this Factor 5 in the upgrade electronics → ok Need to tune the reconstruction/trigger to compensate (present data) Can we use the L0 from the experiment to perform our parallel acquisition Can be extracted from a CROC → maybe not optimal (location) Firmware has to be adapted to store a few consecutive events per L0 Would probably use the SPECS for data acquisition Difficulty to correlate new/current electronics events This would be most certainly very useful Can we locally count the number of L0 ? December 16th, 2011 Frédéric Machefert – Calorimeter Upgrade Meeting

Irradiation of Modules – PMT Gain Irradiation of the modules : Yuri 2 modules in the tunnel have to be scanned during the shutdown → Yuri's presentation How do it compare with the recent measurements ? Scan done most probably in February Need to evaluate the dose received Tunnel passive dosimeters will be read during the shutdown Asked Pascal Perret to read them with the other passive dosimeter of the Calo Almost all the Calo passive dosimeters will be read out December 16th, 2011 Frédéric Machefert – Calorimeter Upgrade Meeting

SPD / PRS decision SPD/PRS Motivations for the SPD/PRS are weak Physics gain (trigger, offline) looks small – maybe inexistant (remove lead) Not negligible technical problems (conception, manpower, cost, ...) There seems to be a general concensus on the removal of SPD/PRS Latest PID workshop conclusion : We should make a decision by the end of the year (→ Pascal's talk) No one is really involved in it This requires MC simulations → see below December 16th, 2011 Frédéric Machefert – Calorimeter Upgrade Meeting

MC productions planned There has been a MC production meeting Calorimeter short term issues SPD/PRS decisions Pile up effects on both ECAL and HCAL Calorimeter MC production proposal : 3 luminosities : 1033, 2x1033, 3x1033 No SPD/PRS type configuration → 3 samples 2 configurations 1 extra sample at 2x1033 with SPD/PRS Choose physics channels with photons 2 physics channels with photons of different Pt ranges (pile-up has varying effects with respect to the Pt) High Pt : B → K*g or B → fg Low Pt : sample with low Pt photon/p0 Only for 2x1033 and no SPD/PRS → 1 extra sample 5 samples in total Keep MC for all Keep intermediate steps for 2 samples 2x1033 High Pt and low Pt 100k per sample should be ok December 16th, 2011 Frédéric Machefert – Calorimeter Upgrade Meeting

Electronics : Not covered items The « fast signal » (GBT) implementation on the new FEB is not clear We would like to « externalize » this parts Example of the present calorimeter optical mezzanine → Bologna We could imagine building optical mezzanines (GBT, optical emitter) to plug on the FEB A new control board is needed in the crates Should provide the clock, slow control, command signals to the backplane, FEB, TVB Slow control Some parts have to be replaced and some other will be kept FEB vs LED, HV, integrators, etc... Keep SPECS everywhere would be easier for us... unless we are alone Another solution would be to change the firmware of the SPECS FPGA to be kept SPECS → I2C would become I2C(GBT) → I2C A GBT mezzanine would replace the SPECS mezzanine This looks feasible but no real work on this field yet The future TELL1 → TELL40 will have to be programmed to swallow the Calo data December 16th, 2011 Frédéric Machefert – Calorimeter Upgrade Meeting

BACKUP December 16th, 2011 Frédéric Machefert – Calorimeter Upgrade Meeting

Irradiation of Modules – PMT Gain Irradiation of the modules : Yuri 2 modules in the tunnel have to be scanned during the shutdown → Yuri's presentation How do it compare with the recent measurements ? Scan done most probably in February Need to evaluate the dose received Tunnel passive dosimeters will be read during the shutdown Asked Pascal Perret to read them with the other passive dosimeter of the Calo Almost all the Calo passive dosimeters will be read out Questions on the Gain of the PMT and the electronics Reduce the gain of the PMT by a factor 5 to keep them alive Compensate on the electronics by the same factor But we have to think of Changing the Pt range of the ECAL/HCAL to look for different physics process What is the foreseen effect of the present module/PMT ageing How can we already extrapolate it to 2018 and the upgrade December 16th, 2011 Frédéric Machefert – Calorimeter Upgrade Meeting