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“Small Parts”. Jim Fast, Craig Aalseth PNNL. Detector String = “Small Parts”. Recent Update to “Small Parts”. Set of representative drawings generated Dimensions sufficient to build GEANT model Accurate mass, volume, surface area, material Provided to Simulation Group on October 18

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“Small Parts”

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Small parts

“Small Parts”

Jim Fast, Craig Aalseth

PNNL

Majorana Collaboration Meeting

Oct 31 – Nov 2, 2005 Santa Fe, NM


Detector string small parts

Detector String = “Small Parts”

Majorana Collaboration Meeting

Oct 31 – Nov 2, 2005 Santa Fe, NM


Recent update to small parts

Recent Update to “Small Parts”

  • Set of representative drawings generated

    • Dimensions sufficient to build GEANT model

    • Accurate mass, volume, surface area, material

  • Provided to Simulation Group on October 18

    • More detail to cables, front end board

    • More detail on part size, mass and location

  • More revisions required

    • Show FET and feedback resistor explicitly

    • Add cable connection details at front end board

    • Show cables exiting cryostat explicitly

Majorana Collaboration Meeting

Oct 31 – Nov 2, 2005 Santa Fe, NM


The rest of this talk in a nutshell

The rest of this talk in a nutshell

  • Next several slides are the latest drawings

    • Details will be much to small to see here

    • Files are available as PDFs on web at Majorana/TF3

  • Mass, volume, materials summary

    • Two slides at the end of the talk

Majorana Collaboration Meeting

Oct 31 – Nov 2, 2005 Santa Fe, NM


Detector string assembly

Detector String Assembly

Majorana Collaboration Meeting

Oct 31 – Nov 2, 2005 Santa Fe, NM


Main cold plate

(Main) Cold Plate

Majorana Collaboration Meeting

Oct 31 – Nov 2, 2005 Santa Fe, NM


Stringer lid small cold plate

Stringer Lid (small cold plate)

Majorana Collaboration Meeting

Oct 31 – Nov 2, 2005 Santa Fe, NM


Support rods

Support Rods

Majorana Collaboration Meeting

Oct 31 – Nov 2, 2005 Santa Fe, NM


Germanium detector tray

Germanium Detector Tray

Majorana Collaboration Meeting

Oct 31 – Nov 2, 2005 Santa Fe, NM


Germanium crystal

Germanium Crystal

Majorana Collaboration Meeting

Oct 31 – Nov 2, 2005 Santa Fe, NM


Kapton cables

Kapton Cables

More on these tomorrow

Majorana Collaboration Meeting

Oct 31 – Nov 2, 2005 Santa Fe, NM


Contact pressure ring cable clamp

Contact Pressure Ring (cable clamp)

Majorana Collaboration Meeting

Oct 31 – Nov 2, 2005 Santa Fe, NM


Front end electronics board

Front End Electronics Board

Board size is good, but details of Cu traces, resistor and FET are not quite right yet

Majorana Collaboration Meeting

Oct 31 – Nov 2, 2005 Santa Fe, NM


Thermal shroud

Thermal Shroud

Majorana Collaboration Meeting

Oct 31 – Nov 2, 2005 Santa Fe, NM


Parts near the detectors below the cold plate

Parts Near the DetectorsBelow the Cold Plate

  • Germanium detectors

    • Mass: 57 x 1.1 kg = 62.7 kg

    • Volume: 57 x 207.67 cm3 = 11,837 cm3

    • Surface area: 57 x 213.374 cm2 = 12,162 cm2

  • Support tubes (ULB copper produced on site)

    • Mass: 19 x 3 x 4.023 g = 229.3 g

    • Volume: 19 x 3 x 0.452 cm3 = 25.764 cm3

    • Surface area: 19 x 3 x 50.88 cm2 = 2,900.16 cm2

  • Ge detector support trays (CTFE right now; PEEK and silicon also mentioned)

    • Mass: 19 x 3 x 8.637 g = 492.31 g

    • Volume: 19 x 3 x 4.055 cm3 = 231.135 cm3

    • Surface area: 19 x 3 x 44.92 cm2 = 2560.44 cm2

  • Detector to FET cables (Cu/Kapton “special materials”; Belden coax, Cu/Nb)

    • Mass: 19 x 3 x

    • Volume: 19 x 3 x 0.959 cm3 = 54.663 cm3

    • Surface area: 19 x 3 x 14.48 cm2 = 823.48 cm2

  • Thermal shroud (ULB copper produced on site)

    • Mass: 2.000 kg

    • Volume: 224.68 cm3

    • Surface area: 8993.33 cm2

Majorana Collaboration Meeting

Oct 31 – Nov 2, 2005 Santa Fe, NM


Parts near the detectors above the cold plate

Front End Board

Resistor

FET

Parts Near the DetectorsAbove the Cold Plate

  • Cold Plates (ULB copper produced on site)

    • Mass: 1 x 3.916 kg + 19 x 0.421 = 11.905 kg

    • Volume: 440.016 cm3 + 19 x 47.243cm3 = 1337.462 cm3

    • Surface area: cm2 = cm2

  • Front end electronics boards (Cu on Teflon, or Cu on Kapton)

    • Integrated feedback capacitance

    • Mass: 57 x # electrodes x (0.298 g CTFE+0.011 g Cu+0.69 mg Au)

      • 50.958 g CTFE, 1.881 g Cu, 0.118 g Au for 3 electrodes per crystal (including HV contact)

  • Feedback resistors

    • RhO2 (ROX) on Al2O3, gold contacts, wirebonds, epoxy

    • Mass: 5.9 E-4 g per resistor

  • FETs (Interfet 2N4393)

    • Silicon die, some aluminum, wirebonds, epoxy

    • Mass: 1.5E-4 g per FET

  • HV Coupling Capacitors (Kapton/Cu?)

    • Mass: ?

  • Readout cables, FET to outside (Cu/Kapton)

    • Mass: ?

Majorana Collaboration Meeting

Oct 31 – Nov 2, 2005 Santa Fe, NM


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