Produzione dei Primi Photo Detector Module di Darkside a Pisa

 
 
Produzione dei Primi Photo Detector Module di Darkside a Pisa
Produzione dei Primi
 Photo
 Detector
 Module di
 Darkside
 a Pisa
Eugenio Paoloni per
il gruppo Darkside Pisa
Produzione dei Primi Photo Detector Module di Darkside a Pisa
Talk Outline

       Darkside 20K .

       What we have to assemble.

       What we have to test.

       How much space we do need and when.




E. Paoloni, INF N & Università di Pisa   2   Ottobre 2017, Pisa
New U.S. and international collaborators so
Darkside 20K                             (K Stands For Metric Ton)




E. Paoloni, INF N & Università di Pisa         3      Ottobre 2017, Pisa
                         19 Feb 2016                                DS-20k (C. J.
Darkside 20 Ton
    Approved by the CSN2 and endorsed with 5 M€

        940k€ assigned in 2018.

    Requires complete financial coverage (NSF, etc.)

    In review by the CTS.

    New collaboration agreement signed on June 15, 2017, with Canada
    Institutions to provide additional financial support:

        Canadian groups (Carleton, TRIUMF, Laurentian, Alberta, Queen’s and
        SNOLAB) […]with the intention of submitting a capital funding request on
        the order of at least 15-20M$ CAD in support of DarkSide-20k and the
        global argon program resulting from this collaboration.

    We are moving towards a global argon dark matter collaboration
    (September 8, 2017)
E. Paoloni, INF N & Università di Pisa                 4      Pisa, July 2017
Darkside 20 Ton
                                                           N T
    Approved by the CSN2 and endorsed with 5 M€
                                                       R A      5
                                                 F   G    2 4 1
        940k€ assigned in 2018.
                                           NS 162 D
    Requires complete financial coverage (NSF,H  Y  -      V E
                                           P  etc.)
                                                        RO
                                                    P P
    In review by the CTS.                       A
    New collaboration agreement signed on June 15, 2017, with Canada
    Institutions to provide additional financial support:

        Canadian groups (Carleton, TRIUMF, Laurentian, Alberta, Queen’s and
        SNOLAB) […]with the intention of submitting a capital funding request on
        the order of at least 15-20M$ CAD in support of DarkSide-20k and the
        global argon program resulting from this collaboration.

    We are moving towards a global argon dark matter collaboration
    (September 8, 2017)
E. Paoloni, INF N & Università di Pisa             5          Pisa, July 2017
The Detector Module
       The Detector Module will be conceptually equivalent to
       the Photo Multiplier

           A device able to detect and count photons with:

               higher efficiency: better filling factor with respect to PM

               lower backgrounds: higher radio-purity with respect to PM

           Not available on the market: we have to design and built it

       It will be the key ingredient of the future multi ton
       noble gas detectors for Dark Matter and neutrinos.

E. Paoloni, INF N & Università di Pisa                  6          Ottobre 2017, Pisa
Detector Module Components


    Tile 49.5 x 49.5 mm2 :
    24 SiPMs on sapphire substrate

    Front-end Electronics:
    4 Transimpedance Amplifiers, sum and
    analogical differential output driver

    Plastic cage to hold the Detector
    Modules components in place




E. Paoloni, INF N & Università di Pisa      7   Ottobre 2017, Pisa
Why In The Clean Room?

       We have to maintain the contamination from
       radioactive materials at a minimum (dust, finger prints,
       etc.)

       The SiPMs on the tile will have the whole surface and
       the wire bonds exposed: the clean room is the natural
       place for the assembly of the PDM.




E. Paoloni, INF N & Università di Pisa   8      Ottobre 2017, Pisa
Production Work-Flow
       Quality Control is the main assurance against Murphy’s Law
               Quality Control ( QC ) after any major/dangerous
               procedure.



      SiPM Tile                     QC
                                                                       Delivery
       Produced
          by       Shipment Reception           DM                QC
      Someone Else
                                              Construction
      Front End                          QC



E. Paoloni, INF N & Università di Pisa          10     L’Aquila, GSSI Feb 2017
Pre Production Work Flow
       Quality Control is the main assurance against Murphy’s Law
               Quality Control ( QC ) after any major/dangerous
               procedure.



    SiPM Tile                              QC
                                                                                Delivery
      Princeton
                 Shipment           Reception Pisa        DM               QC
   Gran Sasso Lab.
                                                     Construction Pisa
      Front End                            QC



E. Paoloni, INF N & Università di Pisa                    11    L’Aquila, GSSI Feb 2017
Current Status
       SiPM from FBK: production started in August

       Tile substrate layout: almost ready (Bologna)

       Front End Board circuit topology, substrate layout:
       almost ready (LNGS)

       Plastic cage design, assembly tools and procedures:
       almost ready (Pisa)

       Test stand at room temperature (Pisa) almost ready


E. Paoloni, INF N & Università di Pisa   12     Ottobre 2017, Pisa
The Big Picture
       By the end of 2017: production of the first PDM prototype
       with the almost final dimensions, SiPMs and materials.

       By the end of 2018: production and qualification at room
       temperature of 300 PDM for the Darkside 1ton prototype.

       Technology transfer to Nuova Officina Assergi of the
       know how needed to produce and test the whole batch of
       PDM for Darkside 20K (order of 8000).

       2018 - 2020: setup a test stand at cryogenic temperature
       for the next generation of PDMs.

E. Paoloni, INF N & Università di Pisa   13       Ottobre 2017, Pisa
Required Space In 2018
       Electric Test Stand:

           1 Rack: foot print 1m2, power plug O (1 kW)

              low voltage power supply, high voltage SMU, switching matrix, signal
              generator

           Workbench: foot print 3m x 1m, power plug O( 1kW)

              Laser stimulus, oscilloscope, PC

              Assembly space

           Black box: foot print 1m x 1m

           5 Closets to store the tools, the incoming parts and the complete
           parts

E. Paoloni, INF N & Università di Pisa                  14         Ottobre 2017, Pisa
Required Services In 2018

       Micro bonding: rework of bad/broken wire bonds
       among the SiPM and the Tile.

       Mechanical characterization of the incoming
       components, of the assembly tools and of the final
       product.




E. Paoloni, INF N & Università di Pisa   15    Ottobre 2017, Pisa
Required Space In 2019-2020

       We would like to extend the test stand capabilities to

           test the PDM at cryogenic temperature in vacuum,

           test the PDM immersed in purified liquid Argon/Xenon.

       This off course will require to bring up a critical mass
       on a Cryogenic facility in the clean room or in the near
       by.



E. Paoloni, INF N & Università di Pisa     16      Ottobre 2017, Pisa
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