Status of the CUORE Electronics and the LHCb RICH Upgrade photodetector chain Lorenzo Cassina - XXIX cycle MiB - Midterm Graduate School Seminar Day
Outline Activity on LHCb MaPTM qualification RICH Upgrade Test beam Ongoing tests on the Elementary Cell at MiB Activity on CUORE DC/DC converter Linear Power supply Optical HUB Mini-tower at LNGS Further activities and courses 2
LHCb RICH Upgrade MaPMT (INFN-Mib) Baseboard CLARO8 chip (INFN-MiB&Fe) Elementary Cell Backboard My activity has been focused on the characterization of the Multi-anode Photon Multiplier Tube and the design of the readout integrated electronics 3
MaPMT qualification (I) Several multi-anode PMTs have been characterized in Milano Bicocca this years. H9500 16x16 pixels Years 2009-10 Non negligible crosstalk and not suitable to single photons R7600 8x8 pixels Years 2010-12 OK for single photons but low active area Eight R11265 MaPMTs measured Single photon gain and uniformity Dark current Cross-talk Behaviour versus temperature Tolerance to magnetic fields and shielding Aging over 3000 hours Full equipped EC tested 4 R11265 8x8 pixels 2012-14 The Hamamatsu R11265 was chosen as the baseline according to the LHCb Upgrade TDR 10/2013 [CERN/LHCC 2013-022, LHCb TDR 14] All the results were collected on a paper and on a CERN note: Characterization of the Hamamatsu R11265-103-M64 multianode photomultiplier tube, L. Cadamuro et al., JINST, vol.9, pp.p06021 (2014). Characterization of the Hamamatsu R11265-103-M64 multianode photomultiplier tube for the LHCb RICH Upgrade, C. Matteuzzi et al., LHCb-PUB-2014-043, CERN-LHCb-PUB-2014-043.
MaPMT qualification (II) R12700 8x8 larger pixels 2014-2015 The use of a larger photon detector in the perpheral areas of the RICH-2 detector allows to significantly reduce the costs, losing only 1% of overall PID performance. The Hamamatsu H12700 (8x8, 52x52 mm 2 pixels) was fully characterized (3 samples). This device fulfills the RICH requirements (single photon sensitivity, large active area, low dark current). The recently produced Hamamatsu R12699 was also tested (2 samples). Compared to the H12700, this device is devoid of the socket provided by the manufacturer, so that better cross-talk performance can be achived. The outcomes of the characterization is going to be published on CERN Document Service (paper currently under final review) 5
RICH Test Beam (I) Beam line H8 (T4) at SPS North Area High energy and high resolution beam Beam particles: protons and pions Energy: 180 GeV 10 6 10 7 particles per spill Data acquisition and monitoring from the control room Test Box Telescope (tracking and trigger) 6
RICH Test Beam (II) Elementary Cell Beam 7
RICH Test Beam (III) Results Radius estimation from integrated events: R 60.6 mm 60.6 mm 8
RICH Test Beam (IV) Results Radius estimation from integrated events: R 60.6 mm Radius resolution: σ R 0.47 mm 9
RICH Test Beam (V) Results Radius estimation from integrated events: R 60.6 mm Radius resolution: σ R 0.47 mm Beam centre resolution: σ x 0.48 mm σ R σ y 1.79 mm (due to the MaPMT position) Optimization of the trigger thresholds Number of recorded photon per hits to the expectation 10 The system operated extremely well. The electronics could not operate with the lowest threshold values. Submission of a chip version with new output pad to solve this problem.
Ongoing tests on EC at MiB Blue LED Only one pixel illuminated Ongoing measurements - Test on the new CLARO chip data acquisition at lowest threshold values. - Cross-talk of the whole system one pixel illuminated and acquisition of the neighbouring channels - Threshold scans with the LED Optimization of the CLAROs threshold. Detection efficiency versus noise rejection - DAC scan to calibrate the chips and further tests 11
CUORE Power supply chain 12 AD/DC converter: 48 V Up to 25 A Commercially available DC/DC: Provides the bias to the linear power supply (two programmable output voltages, 6.5 V 15 V) Provides the bias to the digital system. (one programmable output voltage, 4.5 V 8 V) Linear power supply: Provides the bias to the main board and to the analogic system (dual programmable output voltage, ±2.5 V ±6.25 V)
CUORE DC/DC Commercial AC/DC Power line Backplane board (two per crate) Slow control CAN bus Additional board (one per DC/DC) Optical decoupling 13 The DC/DC additional boards are completely designed and produced. Several crates have been tested at MiB Digital block DC/DC board (6 per crate) Linear power supply
CUORE Linear Power Supply DC/DC Filter Power line Slow control CAN bus Additional board (one per LPS) Local monitoring Linear power supply (LPS) Each linear power supply is locally monitored by an additional board which also allows the CAN bus communication to the slow control. A new prototype was designed and produce and the tests of the LPS+additional board system are currently ongoing. 14
CUORE Optical HUB 15 I developed a CAN-to-Optical fiber HUB in order to optically decouple the slow control with the electronic system (linear power supply, main board, Bessel filter board). 77 boards were produced and mounted (full production complete). I designed the microcontroller firmware currently under test. These boards are going to be placed in three boxes and then mounted in the CUORE control room.
CUORE Mini-tower at LNGS I contributed to set uo a first fully-equipped CUORE tower at LNGS in November. The mini-tower includes: AC/DC (commercial) DC/DC crate controlled via CAN bus and equipped with protection filters. Linear power supply monitored by the additional board Main boards Bessel filters Pulsers to provide the reference signal. The instrumentation were optically decoupled. The whole system worked satisfactorilly and could be fully controlled by the DAQ 16
Further activity and courses I attended the following courses and PhD school so far (without taking the exams): - Experimental methods in HEP L. Moroni 40 - Introduction to Bayesian methods E. Milotti 14 - Course on C/C++ D.Menasce Ongoing - PhD school Rivelatori ed Elettronica per Fisica delle Alte Energie, Astrofisica, Applicazioni Spaziali e Fisica Medica Attended Collaboration as tutor for the Labex project. Tutor for the LHCb International Master Class in Particle Physics 2015. Tutor for the Physics Laboratory 1 course (M. Calvi). Co-tutor of a graduand student (A. Limonta). The bachelor thesis aims to develop a digital board to control the DC/DC converters for the CUORE experiment. Contribution to the measurements on scintillating bolometer in the Cryogenic LAB. Collaboration with the Prysmian to design a monitoring system operating at high temperature in a radioactive environment. Collaboration with the Tecnologix to design an acquisition system for characterizing solar cells. 17
The End Thank you for your attention!